![[tokkee]](http://tokkee.org/images/avatar.png){kind=avatar}
| author | Junio C Hamano <gitster@pobox.com> | |
| Wed, 16 Jun 2010 23:21:06 +0000 (16:21 -0700) | ||
| committer | Junio C Hamano <gitster@pobox.com> | |
| Wed, 16 Jun 2010 23:21:06 +0000 (16:21 -0700) |
* np/malloc-threading:
Thread-safe xmalloc and xrealloc needs a recursive mutex
Make xmalloc and xrealloc thread-safe
Thread-safe xmalloc and xrealloc needs a recursive mutex
Make xmalloc and xrealloc thread-safe
| 1 | 2 | |||
|---|---|---|---|---|
| builtin/grep.c | patch | | diff1 | | | | blob | history |
| builtin/pack-objects.c | patch | | diff1 | | | | blob | history |
| git-compat-util.h | patch | | diff1 | | diff2 | | blob | history |
diff --cc builtin/grep.c
index 8e928e217041a159f4a962f0883d740aa84536d7,0000000000000000000000000000000000000000..b194ea3cea531f3a6c81d6d27b5b3028641ba9ce
mode 100644,000000..100644
mode 100644,000000..100644
--- 1/builtin/grep.c
--- /dev/null
+++ b/builtin/grep.c
- #include "thread-utils.h"
+/*
+ * Builtin "git grep"
+ *
+ * Copyright (c) 2006 Junio C Hamano
+ */
+#include "cache.h"
+#include "blob.h"
+#include "tree.h"
+#include "commit.h"
+#include "tag.h"
+#include "tree-walk.h"
+#include "builtin.h"
+#include "parse-options.h"
+#include "userdiff.h"
+#include "grep.h"
+#include "quote.h"
+#include "dir.h"
+
+#ifndef NO_PTHREADS
+#include <pthread.h>
++#include "thread-utils.h"
+#endif
+
+static char const * const grep_usage[] = {
+ "git grep [options] [-e] <pattern> [<rev>...] [[--] path...]",
+ NULL
+};
+
+static int use_threads = 1;
+
+#ifndef NO_PTHREADS
+#define THREADS 8
+static pthread_t threads[THREADS];
+
+static void *load_sha1(const unsigned char *sha1, unsigned long *size,
+ const char *name);
+static void *load_file(const char *filename, size_t *sz);
+
+enum work_type {WORK_SHA1, WORK_FILE};
+
+/* We use one producer thread and THREADS consumer
+ * threads. The producer adds struct work_items to 'todo' and the
+ * consumers pick work items from the same array.
+ */
+struct work_item
+{
+ enum work_type type;
+ char *name;
+
+ /* if type == WORK_SHA1, then 'identifier' is a SHA1,
+ * otherwise type == WORK_FILE, and 'identifier' is a NUL
+ * terminated filename.
+ */
+ void *identifier;
+ char done;
+ struct strbuf out;
+};
+
+/* In the range [todo_done, todo_start) in 'todo' we have work_items
+ * that have been or are processed by a consumer thread. We haven't
+ * written the result for these to stdout yet.
+ *
+ * The work_items in [todo_start, todo_end) are waiting to be picked
+ * up by a consumer thread.
+ *
+ * The ranges are modulo TODO_SIZE.
+ */
+#define TODO_SIZE 128
+static struct work_item todo[TODO_SIZE];
+static int todo_start;
+static int todo_end;
+static int todo_done;
+
+/* Has all work items been added? */
+static int all_work_added;
+
+/* This lock protects all the variables above. */
+static pthread_mutex_t grep_mutex;
+
+/* Used to serialize calls to read_sha1_file. */
+static pthread_mutex_t read_sha1_mutex;
+
+#define grep_lock() pthread_mutex_lock(&grep_mutex)
+#define grep_unlock() pthread_mutex_unlock(&grep_mutex)
+#define read_sha1_lock() pthread_mutex_lock(&read_sha1_mutex)
+#define read_sha1_unlock() pthread_mutex_unlock(&read_sha1_mutex)
+
+/* Signalled when a new work_item is added to todo. */
+static pthread_cond_t cond_add;
+
+/* Signalled when the result from one work_item is written to
+ * stdout.
+ */
+static pthread_cond_t cond_write;
+
+/* Signalled when we are finished with everything. */
+static pthread_cond_t cond_result;
+
+static int print_hunk_marks_between_files;
+static int printed_something;
+
+static void add_work(enum work_type type, char *name, void *id)
+{
+ grep_lock();
+
+ while ((todo_end+1) % ARRAY_SIZE(todo) == todo_done) {
+ pthread_cond_wait(&cond_write, &grep_mutex);
+ }
+
+ todo[todo_end].type = type;
+ todo[todo_end].name = name;
+ todo[todo_end].identifier = id;
+ todo[todo_end].done = 0;
+ strbuf_reset(&todo[todo_end].out);
+ todo_end = (todo_end + 1) % ARRAY_SIZE(todo);
+
+ pthread_cond_signal(&cond_add);
+ grep_unlock();
+}
+
+static struct work_item *get_work(void)
+{
+ struct work_item *ret;
+
+ grep_lock();
+ while (todo_start == todo_end && !all_work_added) {
+ pthread_cond_wait(&cond_add, &grep_mutex);
+ }
+
+ if (todo_start == todo_end && all_work_added) {
+ ret = NULL;
+ } else {
+ ret = &todo[todo_start];
+ todo_start = (todo_start + 1) % ARRAY_SIZE(todo);
+ }
+ grep_unlock();
+ return ret;
+}
+
+static void grep_sha1_async(struct grep_opt *opt, char *name,
+ const unsigned char *sha1)
+{
+ unsigned char *s;
+ s = xmalloc(20);
+ memcpy(s, sha1, 20);
+ add_work(WORK_SHA1, name, s);
+}
+
+static void grep_file_async(struct grep_opt *opt, char *name,
+ const char *filename)
+{
+ add_work(WORK_FILE, name, xstrdup(filename));
+}
+
+static void work_done(struct work_item *w)
+{
+ int old_done;
+
+ grep_lock();
+ w->done = 1;
+ old_done = todo_done;
+ for(; todo[todo_done].done && todo_done != todo_start;
+ todo_done = (todo_done+1) % ARRAY_SIZE(todo)) {
+ w = &todo[todo_done];
+ if (w->out.len) {
+ if (print_hunk_marks_between_files && printed_something)
+ write_or_die(1, "--\n", 3);
+ write_or_die(1, w->out.buf, w->out.len);
+ printed_something = 1;
+ }
+ free(w->name);
+ free(w->identifier);
+ }
+
+ if (old_done != todo_done)
+ pthread_cond_signal(&cond_write);
+
+ if (all_work_added && todo_done == todo_end)
+ pthread_cond_signal(&cond_result);
+
+ grep_unlock();
+}
+
+static void *run(void *arg)
+{
+ int hit = 0;
+ struct grep_opt *opt = arg;
+
+ while (1) {
+ struct work_item *w = get_work();
+ if (!w)
+ break;
+
+ opt->output_priv = w;
+ if (w->type == WORK_SHA1) {
+ unsigned long sz;
+ void* data = load_sha1(w->identifier, &sz, w->name);
+
+ if (data) {
+ hit |= grep_buffer(opt, w->name, data, sz);
+ free(data);
+ }
+ } else if (w->type == WORK_FILE) {
+ size_t sz;
+ void* data = load_file(w->identifier, &sz);
+ if (data) {
+ hit |= grep_buffer(opt, w->name, data, sz);
+ free(data);
+ }
+ } else {
+ assert(0);
+ }
+
+ work_done(w);
+ }
+ free_grep_patterns(arg);
+ free(arg);
+
+ return (void*) (intptr_t) hit;
+}
+
+static void strbuf_out(struct grep_opt *opt, const void *buf, size_t size)
+{
+ struct work_item *w = opt->output_priv;
+ strbuf_add(&w->out, buf, size);
+}
+
+static void start_threads(struct grep_opt *opt)
+{
+ int i;
+
+ pthread_mutex_init(&grep_mutex, NULL);
+ pthread_mutex_init(&read_sha1_mutex, NULL);
+ pthread_cond_init(&cond_add, NULL);
+ pthread_cond_init(&cond_write, NULL);
+ pthread_cond_init(&cond_result, NULL);
+
+ for (i = 0; i < ARRAY_SIZE(todo); i++) {
+ strbuf_init(&todo[i].out, 0);
+ }
+
+ for (i = 0; i < ARRAY_SIZE(threads); i++) {
+ int err;
+ struct grep_opt *o = grep_opt_dup(opt);
+ o->output = strbuf_out;
+ compile_grep_patterns(o);
+ err = pthread_create(&threads[i], NULL, run, o);
+
+ if (err)
+ die("grep: failed to create thread: %s",
+ strerror(err));
+ }
+}
+
+static int wait_all(void)
+{
+ int hit = 0;
+ int i;
+
+ grep_lock();
+ all_work_added = 1;
+
+ /* Wait until all work is done. */
+ while (todo_done != todo_end)
+ pthread_cond_wait(&cond_result, &grep_mutex);
+
+ /* Wake up all the consumer threads so they can see that there
+ * is no more work to do.
+ */
+ pthread_cond_broadcast(&cond_add);
+ grep_unlock();
+
+ for (i = 0; i < ARRAY_SIZE(threads); i++) {
+ void *h;
+ pthread_join(threads[i], &h);
+ hit |= (int) (intptr_t) h;
+ }
+
+ pthread_mutex_destroy(&grep_mutex);
+ pthread_mutex_destroy(&read_sha1_mutex);
+ pthread_cond_destroy(&cond_add);
+ pthread_cond_destroy(&cond_write);
+ pthread_cond_destroy(&cond_result);
+
+ return hit;
+}
+#else /* !NO_PTHREADS */
+#define read_sha1_lock()
+#define read_sha1_unlock()
+
+static int wait_all(void)
+{
+ return 0;
+}
+#endif
+
+static int grep_config(const char *var, const char *value, void *cb)
+{
+ struct grep_opt *opt = cb;
+ char *color = NULL;
+
+ switch (userdiff_config(var, value)) {
+ case 0: break;
+ case -1: return -1;
+ default: return 0;
+ }
+
+ if (!strcmp(var, "color.grep"))
+ opt->color = git_config_colorbool(var, value, -1);
+ else if (!strcmp(var, "color.grep.context"))
+ color = opt->color_context;
+ else if (!strcmp(var, "color.grep.filename"))
+ color = opt->color_filename;
+ else if (!strcmp(var, "color.grep.function"))
+ color = opt->color_function;
+ else if (!strcmp(var, "color.grep.linenumber"))
+ color = opt->color_lineno;
+ else if (!strcmp(var, "color.grep.match"))
+ color = opt->color_match;
+ else if (!strcmp(var, "color.grep.selected"))
+ color = opt->color_selected;
+ else if (!strcmp(var, "color.grep.separator"))
+ color = opt->color_sep;
+ else
+ return git_color_default_config(var, value, cb);
+ if (color) {
+ if (!value)
+ return config_error_nonbool(var);
+ color_parse(value, var, color);
+ }
+ return 0;
+}
+
+/*
+ * Return non-zero if max_depth is negative or path has no more then max_depth
+ * slashes.
+ */
+static int accept_subdir(const char *path, int max_depth)
+{
+ if (max_depth < 0)
+ return 1;
+
+ while ((path = strchr(path, '/')) != NULL) {
+ max_depth--;
+ if (max_depth < 0)
+ return 0;
+ path++;
+ }
+ return 1;
+}
+
+/*
+ * Return non-zero if name is a subdirectory of match and is not too deep.
+ */
+static int is_subdir(const char *name, int namelen,
+ const char *match, int matchlen, int max_depth)
+{
+ if (matchlen > namelen || strncmp(name, match, matchlen))
+ return 0;
+
+ if (name[matchlen] == '\0') /* exact match */
+ return 1;
+
+ if (!matchlen || match[matchlen-1] == '/' || name[matchlen] == '/')
+ return accept_subdir(name + matchlen + 1, max_depth);
+
+ return 0;
+}
+
+/*
+ * git grep pathspecs are somewhat different from diff-tree pathspecs;
+ * pathname wildcards are allowed.
+ */
+static int pathspec_matches(const char **paths, const char *name, int max_depth)
+{
+ int namelen, i;
+ if (!paths || !*paths)
+ return accept_subdir(name, max_depth);
+ namelen = strlen(name);
+ for (i = 0; paths[i]; i++) {
+ const char *match = paths[i];
+ int matchlen = strlen(match);
+ const char *cp, *meta;
+
+ if (is_subdir(name, namelen, match, matchlen, max_depth))
+ return 1;
+ if (!fnmatch(match, name, 0))
+ return 1;
+ if (name[namelen-1] != '/')
+ continue;
+
+ /* We are being asked if the directory ("name") is worth
+ * descending into.
+ *
+ * Find the longest leading directory name that does
+ * not have metacharacter in the pathspec; the name
+ * we are looking at must overlap with that directory.
+ */
+ for (cp = match, meta = NULL; cp - match < matchlen; cp++) {
+ char ch = *cp;
+ if (ch == '*' || ch == '[' || ch == '?') {
+ meta = cp;
+ break;
+ }
+ }
+ if (!meta)
+ meta = cp; /* fully literal */
+
+ if (namelen <= meta - match) {
+ /* Looking at "Documentation/" and
+ * the pattern says "Documentation/howto/", or
+ * "Documentation/diff*.txt". The name we
+ * have should match prefix.
+ */
+ if (!memcmp(match, name, namelen))
+ return 1;
+ continue;
+ }
+
+ if (meta - match < namelen) {
+ /* Looking at "Documentation/howto/" and
+ * the pattern says "Documentation/h*";
+ * match up to "Do.../h"; this avoids descending
+ * into "Documentation/technical/".
+ */
+ if (!memcmp(match, name, meta - match))
+ return 1;
+ continue;
+ }
+ }
+ return 0;
+}
+
+static void *lock_and_read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
+{
+ void *data;
+
+ if (use_threads) {
+ read_sha1_lock();
+ data = read_sha1_file(sha1, type, size);
+ read_sha1_unlock();
+ } else {
+ data = read_sha1_file(sha1, type, size);
+ }
+ return data;
+}
+
+static void *load_sha1(const unsigned char *sha1, unsigned long *size,
+ const char *name)
+{
+ enum object_type type;
+ void *data = lock_and_read_sha1_file(sha1, &type, size);
+
+ if (!data)
+ error("'%s': unable to read %s", name, sha1_to_hex(sha1));
+
+ return data;
+}
+
+static int grep_sha1(struct grep_opt *opt, const unsigned char *sha1,
+ const char *filename, int tree_name_len)
+{
+ struct strbuf pathbuf = STRBUF_INIT;
+ char *name;
+
+ if (opt->relative && opt->prefix_length) {
+ quote_path_relative(filename + tree_name_len, -1, &pathbuf,
+ opt->prefix);
+ strbuf_insert(&pathbuf, 0, filename, tree_name_len);
+ } else {
+ strbuf_addstr(&pathbuf, filename);
+ }
+
+ name = strbuf_detach(&pathbuf, NULL);
+
+#ifndef NO_PTHREADS
+ if (use_threads) {
+ grep_sha1_async(opt, name, sha1);
+ return 0;
+ } else
+#endif
+ {
+ int hit;
+ unsigned long sz;
+ void *data = load_sha1(sha1, &sz, name);
+ if (!data)
+ hit = 0;
+ else
+ hit = grep_buffer(opt, name, data, sz);
+
+ free(data);
+ free(name);
+ return hit;
+ }
+}
+
+static void *load_file(const char *filename, size_t *sz)
+{
+ struct stat st;
+ char *data;
+ int i;
+
+ if (lstat(filename, &st) < 0) {
+ err_ret:
+ if (errno != ENOENT)
+ error("'%s': %s", filename, strerror(errno));
+ return 0;
+ }
+ if (!S_ISREG(st.st_mode))
+ return 0;
+ *sz = xsize_t(st.st_size);
+ i = open(filename, O_RDONLY);
+ if (i < 0)
+ goto err_ret;
+ data = xmalloc(*sz + 1);
+ if (st.st_size != read_in_full(i, data, *sz)) {
+ error("'%s': short read %s", filename, strerror(errno));
+ close(i);
+ free(data);
+ return 0;
+ }
+ close(i);
+ data[*sz] = 0;
+ return data;
+}
+
+static int grep_file(struct grep_opt *opt, const char *filename)
+{
+ struct strbuf buf = STRBUF_INIT;
+ char *name;
+
+ if (opt->relative && opt->prefix_length)
+ quote_path_relative(filename, -1, &buf, opt->prefix);
+ else
+ strbuf_addstr(&buf, filename);
+ name = strbuf_detach(&buf, NULL);
+
+#ifndef NO_PTHREADS
+ if (use_threads) {
+ grep_file_async(opt, name, filename);
+ return 0;
+ } else
+#endif
+ {
+ int hit;
+ size_t sz;
+ void *data = load_file(filename, &sz);
+ if (!data)
+ hit = 0;
+ else
+ hit = grep_buffer(opt, name, data, sz);
+
+ free(data);
+ free(name);
+ return hit;
+ }
+}
+
+static int grep_cache(struct grep_opt *opt, const char **paths, int cached)
+{
+ int hit = 0;
+ int nr;
+ read_cache();
+
+ for (nr = 0; nr < active_nr; nr++) {
+ struct cache_entry *ce = active_cache[nr];
+ if (!S_ISREG(ce->ce_mode))
+ continue;
+ if (!pathspec_matches(paths, ce->name, opt->max_depth))
+ continue;
+ /*
+ * If CE_VALID is on, we assume worktree file and its cache entry
+ * are identical, even if worktree file has been modified, so use
+ * cache version instead
+ */
+ if (cached || (ce->ce_flags & CE_VALID) || ce_skip_worktree(ce)) {
+ if (ce_stage(ce))
+ continue;
+ hit |= grep_sha1(opt, ce->sha1, ce->name, 0);
+ }
+ else
+ hit |= grep_file(opt, ce->name);
+ if (ce_stage(ce)) {
+ do {
+ nr++;
+ } while (nr < active_nr &&
+ !strcmp(ce->name, active_cache[nr]->name));
+ nr--; /* compensate for loop control */
+ }
+ if (hit && opt->status_only)
+ break;
+ }
+ free_grep_patterns(opt);
+ return hit;
+}
+
+static int grep_tree(struct grep_opt *opt, const char **paths,
+ struct tree_desc *tree,
+ const char *tree_name, const char *base)
+{
+ int len;
+ int hit = 0;
+ struct name_entry entry;
+ char *down;
+ int tn_len = strlen(tree_name);
+ struct strbuf pathbuf;
+
+ strbuf_init(&pathbuf, PATH_MAX + tn_len);
+
+ if (tn_len) {
+ strbuf_add(&pathbuf, tree_name, tn_len);
+ strbuf_addch(&pathbuf, ':');
+ tn_len = pathbuf.len;
+ }
+ strbuf_addstr(&pathbuf, base);
+ len = pathbuf.len;
+
+ while (tree_entry(tree, &entry)) {
+ int te_len = tree_entry_len(entry.path, entry.sha1);
+ pathbuf.len = len;
+ strbuf_add(&pathbuf, entry.path, te_len);
+
+ if (S_ISDIR(entry.mode))
+ /* Match "abc/" against pathspec to
+ * decide if we want to descend into "abc"
+ * directory.
+ */
+ strbuf_addch(&pathbuf, '/');
+
+ down = pathbuf.buf + tn_len;
+ if (!pathspec_matches(paths, down, opt->max_depth))
+ ;
+ else if (S_ISREG(entry.mode))
+ hit |= grep_sha1(opt, entry.sha1, pathbuf.buf, tn_len);
+ else if (S_ISDIR(entry.mode)) {
+ enum object_type type;
+ struct tree_desc sub;
+ void *data;
+ unsigned long size;
+
+ data = lock_and_read_sha1_file(entry.sha1, &type, &size);
+ if (!data)
+ die("unable to read tree (%s)",
+ sha1_to_hex(entry.sha1));
+ init_tree_desc(&sub, data, size);
+ hit |= grep_tree(opt, paths, &sub, tree_name, down);
+ free(data);
+ }
+ if (hit && opt->status_only)
+ break;
+ }
+ strbuf_release(&pathbuf);
+ return hit;
+}
+
+static int grep_object(struct grep_opt *opt, const char **paths,
+ struct object *obj, const char *name)
+{
+ if (obj->type == OBJ_BLOB)
+ return grep_sha1(opt, obj->sha1, name, 0);
+ if (obj->type == OBJ_COMMIT || obj->type == OBJ_TREE) {
+ struct tree_desc tree;
+ void *data;
+ unsigned long size;
+ int hit;
+ data = read_object_with_reference(obj->sha1, tree_type,
+ &size, NULL);
+ if (!data)
+ die("unable to read tree (%s)", sha1_to_hex(obj->sha1));
+ init_tree_desc(&tree, data, size);
+ hit = grep_tree(opt, paths, &tree, name, "");
+ free(data);
+ return hit;
+ }
+ die("unable to grep from object of type %s", typename(obj->type));
+}
+
+static int grep_directory(struct grep_opt *opt, const char **paths)
+{
+ struct dir_struct dir;
+ int i, hit = 0;
+
+ memset(&dir, 0, sizeof(dir));
+ setup_standard_excludes(&dir);
+
+ fill_directory(&dir, paths);
+ for (i = 0; i < dir.nr; i++) {
+ hit |= grep_file(opt, dir.entries[i]->name);
+ if (hit && opt->status_only)
+ break;
+ }
+ free_grep_patterns(opt);
+ return hit;
+}
+
+static int context_callback(const struct option *opt, const char *arg,
+ int unset)
+{
+ struct grep_opt *grep_opt = opt->value;
+ int value;
+ const char *endp;
+
+ if (unset) {
+ grep_opt->pre_context = grep_opt->post_context = 0;
+ return 0;
+ }
+ value = strtol(arg, (char **)&endp, 10);
+ if (*endp) {
+ return error("switch `%c' expects a numerical value",
+ opt->short_name);
+ }
+ grep_opt->pre_context = grep_opt->post_context = value;
+ return 0;
+}
+
+static int file_callback(const struct option *opt, const char *arg, int unset)
+{
+ struct grep_opt *grep_opt = opt->value;
+ FILE *patterns;
+ int lno = 0;
+ struct strbuf sb = STRBUF_INIT;
+
+ patterns = fopen(arg, "r");
+ if (!patterns)
+ die_errno("cannot open '%s'", arg);
+ while (strbuf_getline(&sb, patterns, '\n') == 0) {
+ /* ignore empty line like grep does */
+ if (sb.len == 0)
+ continue;
+ append_grep_pattern(grep_opt, strbuf_detach(&sb, NULL), arg,
+ ++lno, GREP_PATTERN);
+ }
+ fclose(patterns);
+ strbuf_release(&sb);
+ return 0;
+}
+
+static int not_callback(const struct option *opt, const char *arg, int unset)
+{
+ struct grep_opt *grep_opt = opt->value;
+ append_grep_pattern(grep_opt, "--not", "command line", 0, GREP_NOT);
+ return 0;
+}
+
+static int and_callback(const struct option *opt, const char *arg, int unset)
+{
+ struct grep_opt *grep_opt = opt->value;
+ append_grep_pattern(grep_opt, "--and", "command line", 0, GREP_AND);
+ return 0;
+}
+
+static int open_callback(const struct option *opt, const char *arg, int unset)
+{
+ struct grep_opt *grep_opt = opt->value;
+ append_grep_pattern(grep_opt, "(", "command line", 0, GREP_OPEN_PAREN);
+ return 0;
+}
+
+static int close_callback(const struct option *opt, const char *arg, int unset)
+{
+ struct grep_opt *grep_opt = opt->value;
+ append_grep_pattern(grep_opt, ")", "command line", 0, GREP_CLOSE_PAREN);
+ return 0;
+}
+
+static int pattern_callback(const struct option *opt, const char *arg,
+ int unset)
+{
+ struct grep_opt *grep_opt = opt->value;
+ append_grep_pattern(grep_opt, arg, "-e option", 0, GREP_PATTERN);
+ return 0;
+}
+
+static int help_callback(const struct option *opt, const char *arg, int unset)
+{
+ return -1;
+}
+
+int cmd_grep(int argc, const char **argv, const char *prefix)
+{
+ int hit = 0;
+ int cached = 0;
+ int seen_dashdash = 0;
+ int external_grep_allowed__ignored;
+ struct grep_opt opt;
+ struct object_array list = { 0, 0, NULL };
+ const char **paths = NULL;
+ int i;
+ int dummy;
+ int nongit = 0, use_index = 1;
+ struct option options[] = {
+ OPT_BOOLEAN(0, "cached", &cached,
+ "search in index instead of in the work tree"),
+ OPT_BOOLEAN(0, "index", &use_index,
+ "--no-index finds in contents not managed by git"),
+ OPT_GROUP(""),
+ OPT_BOOLEAN('v', "invert-match", &opt.invert,
+ "show non-matching lines"),
+ OPT_BOOLEAN('i', "ignore-case", &opt.ignore_case,
+ "case insensitive matching"),
+ OPT_BOOLEAN('w', "word-regexp", &opt.word_regexp,
+ "match patterns only at word boundaries"),
+ OPT_SET_INT('a', "text", &opt.binary,
+ "process binary files as text", GREP_BINARY_TEXT),
+ OPT_SET_INT('I', NULL, &opt.binary,
+ "don't match patterns in binary files",
+ GREP_BINARY_NOMATCH),
+ { OPTION_INTEGER, 0, "max-depth", &opt.max_depth, "depth",
+ "descend at most <depth> levels", PARSE_OPT_NONEG,
+ NULL, 1 },
+ OPT_GROUP(""),
+ OPT_BIT('E', "extended-regexp", &opt.regflags,
+ "use extended POSIX regular expressions", REG_EXTENDED),
+ OPT_NEGBIT('G', "basic-regexp", &opt.regflags,
+ "use basic POSIX regular expressions (default)",
+ REG_EXTENDED),
+ OPT_BOOLEAN('F', "fixed-strings", &opt.fixed,
+ "interpret patterns as fixed strings"),
+ OPT_GROUP(""),
+ OPT_BOOLEAN('n', NULL, &opt.linenum, "show line numbers"),
+ OPT_NEGBIT('h', NULL, &opt.pathname, "don't show filenames", 1),
+ OPT_BIT('H', NULL, &opt.pathname, "show filenames", 1),
+ OPT_NEGBIT(0, "full-name", &opt.relative,
+ "show filenames relative to top directory", 1),
+ OPT_BOOLEAN('l', "files-with-matches", &opt.name_only,
+ "show only filenames instead of matching lines"),
+ OPT_BOOLEAN(0, "name-only", &opt.name_only,
+ "synonym for --files-with-matches"),
+ OPT_BOOLEAN('L', "files-without-match",
+ &opt.unmatch_name_only,
+ "show only the names of files without match"),
+ OPT_BOOLEAN('z', "null", &opt.null_following_name,
+ "print NUL after filenames"),
+ OPT_BOOLEAN('c', "count", &opt.count,
+ "show the number of matches instead of matching lines"),
+ OPT__COLOR(&opt.color, "highlight matches"),
+ OPT_GROUP(""),
+ OPT_CALLBACK('C', NULL, &opt, "n",
+ "show <n> context lines before and after matches",
+ context_callback),
+ OPT_INTEGER('B', NULL, &opt.pre_context,
+ "show <n> context lines before matches"),
+ OPT_INTEGER('A', NULL, &opt.post_context,
+ "show <n> context lines after matches"),
+ OPT_NUMBER_CALLBACK(&opt, "shortcut for -C NUM",
+ context_callback),
+ OPT_BOOLEAN('p', "show-function", &opt.funcname,
+ "show a line with the function name before matches"),
+ OPT_GROUP(""),
+ OPT_CALLBACK('f', NULL, &opt, "file",
+ "read patterns from file", file_callback),
+ { OPTION_CALLBACK, 'e', NULL, &opt, "pattern",
+ "match <pattern>", PARSE_OPT_NONEG, pattern_callback },
+ { OPTION_CALLBACK, 0, "and", &opt, NULL,
+ "combine patterns specified with -e",
+ PARSE_OPT_NOARG | PARSE_OPT_NONEG, and_callback },
+ OPT_BOOLEAN(0, "or", &dummy, ""),
+ { OPTION_CALLBACK, 0, "not", &opt, NULL, "",
+ PARSE_OPT_NOARG | PARSE_OPT_NONEG, not_callback },
+ { OPTION_CALLBACK, '(', NULL, &opt, NULL, "",
+ PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
+ open_callback },
+ { OPTION_CALLBACK, ')', NULL, &opt, NULL, "",
+ PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
+ close_callback },
+ OPT_BOOLEAN('q', "quiet", &opt.status_only,
+ "indicate hit with exit status without output"),
+ OPT_BOOLEAN(0, "all-match", &opt.all_match,
+ "show only matches from files that match all patterns"),
+ OPT_GROUP(""),
+ OPT_BOOLEAN(0, "ext-grep", &external_grep_allowed__ignored,
+ "allow calling of grep(1) (ignored by this build)"),
+ { OPTION_CALLBACK, 0, "help-all", &options, NULL, "show usage",
+ PARSE_OPT_HIDDEN | PARSE_OPT_NOARG, help_callback },
+ OPT_END()
+ };
+
+ prefix = setup_git_directory_gently(&nongit);
+
+ /*
+ * 'git grep -h', unlike 'git grep -h <pattern>', is a request
+ * to show usage information and exit.
+ */
+ if (argc == 2 && !strcmp(argv[1], "-h"))
+ usage_with_options(grep_usage, options);
+
+ memset(&opt, 0, sizeof(opt));
+ opt.prefix = prefix;
+ opt.prefix_length = (prefix && *prefix) ? strlen(prefix) : 0;
+ opt.relative = 1;
+ opt.pathname = 1;
+ opt.pattern_tail = &opt.pattern_list;
+ opt.header_tail = &opt.header_list;
+ opt.regflags = REG_NEWLINE;
+ opt.max_depth = -1;
+
+ strcpy(opt.color_context, "");
+ strcpy(opt.color_filename, "");
+ strcpy(opt.color_function, "");
+ strcpy(opt.color_lineno, "");
+ strcpy(opt.color_match, GIT_COLOR_BOLD_RED);
+ strcpy(opt.color_selected, "");
+ strcpy(opt.color_sep, GIT_COLOR_CYAN);
+ opt.color = -1;
+ git_config(grep_config, &opt);
+ if (opt.color == -1)
+ opt.color = git_use_color_default;
+
+ /*
+ * If there is no -- then the paths must exist in the working
+ * tree. If there is no explicit pattern specified with -e or
+ * -f, we take the first unrecognized non option to be the
+ * pattern, but then what follows it must be zero or more
+ * valid refs up to the -- (if exists), and then existing
+ * paths. If there is an explicit pattern, then the first
+ * unrecognized non option is the beginning of the refs list
+ * that continues up to the -- (if exists), and then paths.
+ */
+ argc = parse_options(argc, argv, prefix, options, grep_usage,
+ PARSE_OPT_KEEP_DASHDASH |
+ PARSE_OPT_STOP_AT_NON_OPTION |
+ PARSE_OPT_NO_INTERNAL_HELP);
+
+ if (use_index && nongit)
+ /* die the same way as if we did it at the beginning */
+ setup_git_directory();
+
+ /*
+ * skip a -- separator; we know it cannot be
+ * separating revisions from pathnames if
+ * we haven't even had any patterns yet
+ */
+ if (argc > 0 && !opt.pattern_list && !strcmp(argv[0], "--")) {
+ argv++;
+ argc--;
+ }
+
+ /* First unrecognized non-option token */
+ if (argc > 0 && !opt.pattern_list) {
+ append_grep_pattern(&opt, argv[0], "command line", 0,
+ GREP_PATTERN);
+ argv++;
+ argc--;
+ }
+
+ if (!opt.pattern_list)
+ die("no pattern given.");
+ if (!opt.fixed && opt.ignore_case)
+ opt.regflags |= REG_ICASE;
+ if ((opt.regflags != REG_NEWLINE) && opt.fixed)
+ die("cannot mix --fixed-strings and regexp");
+
+#ifndef NO_PTHREADS
+ if (online_cpus() == 1 || !grep_threads_ok(&opt))
+ use_threads = 0;
+
+ if (use_threads) {
+ if (opt.pre_context || opt.post_context)
+ print_hunk_marks_between_files = 1;
+ start_threads(&opt);
+ }
+#else
+ use_threads = 0;
+#endif
+
+ compile_grep_patterns(&opt);
+
+ /* Check revs and then paths */
+ for (i = 0; i < argc; i++) {
+ const char *arg = argv[i];
+ unsigned char sha1[20];
+ /* Is it a rev? */
+ if (!get_sha1(arg, sha1)) {
+ struct object *object = parse_object(sha1);
+ if (!object)
+ die("bad object %s", arg);
+ add_object_array(object, arg, &list);
+ continue;
+ }
+ if (!strcmp(arg, "--")) {
+ i++;
+ seen_dashdash = 1;
+ }
+ break;
+ }
+
+ /* The rest are paths */
+ if (!seen_dashdash) {
+ int j;
+ for (j = i; j < argc; j++)
+ verify_filename(prefix, argv[j]);
+ }
+
+ if (i < argc)
+ paths = get_pathspec(prefix, argv + i);
+ else if (prefix) {
+ paths = xcalloc(2, sizeof(const char *));
+ paths[0] = prefix;
+ paths[1] = NULL;
+ }
+
+ if (!use_index) {
+ int hit;
+ if (cached)
+ die("--cached cannot be used with --no-index.");
+ if (list.nr)
+ die("--no-index cannot be used with revs.");
+ hit = grep_directory(&opt, paths);
+ if (use_threads)
+ hit |= wait_all();
+ return !hit;
+ }
+
+ if (!list.nr) {
+ int hit;
+ if (!cached)
+ setup_work_tree();
+
+ hit = grep_cache(&opt, paths, cached);
+ if (use_threads)
+ hit |= wait_all();
+ return !hit;
+ }
+
+ if (cached)
+ die("both --cached and trees are given.");
+
+ for (i = 0; i < list.nr; i++) {
+ struct object *real_obj;
+ real_obj = deref_tag(list.objects[i].item, NULL, 0);
+ if (grep_object(&opt, paths, real_obj, list.objects[i].name)) {
+ hit = 1;
+ if (opt.status_only)
+ break;
+ }
+ }
+
+ if (use_threads)
+ hit |= wait_all();
+ free_grep_patterns(&opt);
+ return !hit;
+}
diff --cc builtin/pack-objects.c
index 97802585ea3ac69ac6ed2e7995605bdcae84558e,0000000000000000000000000000000000000000..214d7ef2b12d41e8d70539fe4a4b16fde71a780a
mode 100644,000000..100644
mode 100644,000000..100644
--- /dev/null
+++ b/builtin/pack-objects.c
- #include "thread-utils.h"
+#include "builtin.h"
+#include "cache.h"
+#include "attr.h"
+#include "object.h"
+#include "blob.h"
+#include "commit.h"
+#include "tag.h"
+#include "tree.h"
+#include "delta.h"
+#include "pack.h"
+#include "pack-revindex.h"
+#include "csum-file.h"
+#include "tree-walk.h"
+#include "diff.h"
+#include "revision.h"
+#include "list-objects.h"
+#include "progress.h"
+#include "refs.h"
+
+#ifndef NO_PTHREADS
- pthread_mutex_init(&read_mutex, NULL);
+#include <pthread.h>
++#include "thread-utils.h"
+#endif
+
+static const char pack_usage[] =
+ "git pack-objects [{ -q | --progress | --all-progress }]\n"
+ " [--all-progress-implied]\n"
+ " [--max-pack-size=N] [--local] [--incremental]\n"
+ " [--window=N] [--window-memory=N] [--depth=N]\n"
+ " [--no-reuse-delta] [--no-reuse-object] [--delta-base-offset]\n"
+ " [--threads=N] [--non-empty] [--revs [--unpacked | --all]*]\n"
+ " [--reflog] [--stdout | base-name] [--include-tag]\n"
+ " [--keep-unreachable | --unpack-unreachable \n"
+ " [<ref-list | <object-list]";
+
+struct object_entry {
+ struct pack_idx_entry idx;
+ unsigned long size; /* uncompressed size */
+ struct packed_git *in_pack; /* already in pack */
+ off_t in_pack_offset;
+ struct object_entry *delta; /* delta base object */
+ struct object_entry *delta_child; /* deltified objects who bases me */
+ struct object_entry *delta_sibling; /* other deltified objects who
+ * uses the same base as me
+ */
+ void *delta_data; /* cached delta (uncompressed) */
+ unsigned long delta_size; /* delta data size (uncompressed) */
+ unsigned long z_delta_size; /* delta data size (compressed) */
+ unsigned int hash; /* name hint hash */
+ enum object_type type;
+ enum object_type in_pack_type; /* could be delta */
+ unsigned char in_pack_header_size;
+ unsigned char preferred_base; /* we do not pack this, but is available
+ * to be used as the base object to delta
+ * objects against.
+ */
+ unsigned char no_try_delta;
+};
+
+/*
+ * Objects we are going to pack are collected in objects array (dynamically
+ * expanded). nr_objects & nr_alloc controls this array. They are stored
+ * in the order we see -- typically rev-list --objects order that gives us
+ * nice "minimum seek" order.
+ */
+static struct object_entry *objects;
+static struct pack_idx_entry **written_list;
+static uint32_t nr_objects, nr_alloc, nr_result, nr_written;
+
+static int non_empty;
+static int reuse_delta = 1, reuse_object = 1;
+static int keep_unreachable, unpack_unreachable, include_tag;
+static int local;
+static int incremental;
+static int ignore_packed_keep;
+static int allow_ofs_delta;
+static const char *base_name;
+static int progress = 1;
+static int window = 10;
+static unsigned long pack_size_limit, pack_size_limit_cfg;
+static int depth = 50;
+static int delta_search_threads;
+static int pack_to_stdout;
+static int num_preferred_base;
+static struct progress *progress_state;
+static int pack_compression_level = Z_DEFAULT_COMPRESSION;
+static int pack_compression_seen;
+
+static unsigned long delta_cache_size = 0;
+static unsigned long max_delta_cache_size = 256 * 1024 * 1024;
+static unsigned long cache_max_small_delta_size = 1000;
+
+static unsigned long window_memory_limit = 0;
+
+/*
+ * The object names in objects array are hashed with this hashtable,
+ * to help looking up the entry by object name.
+ * This hashtable is built after all the objects are seen.
+ */
+static int *object_ix;
+static int object_ix_hashsz;
+
+/*
+ * stats
+ */
+static uint32_t written, written_delta;
+static uint32_t reused, reused_delta;
+
+
+static void *get_delta(struct object_entry *entry)
+{
+ unsigned long size, base_size, delta_size;
+ void *buf, *base_buf, *delta_buf;
+ enum object_type type;
+
+ buf = read_sha1_file(entry->idx.sha1, &type, &size);
+ if (!buf)
+ die("unable to read %s", sha1_to_hex(entry->idx.sha1));
+ base_buf = read_sha1_file(entry->delta->idx.sha1, &type, &base_size);
+ if (!base_buf)
+ die("unable to read %s", sha1_to_hex(entry->delta->idx.sha1));
+ delta_buf = diff_delta(base_buf, base_size,
+ buf, size, &delta_size, 0);
+ if (!delta_buf || delta_size != entry->delta_size)
+ die("delta size changed");
+ free(buf);
+ free(base_buf);
+ return delta_buf;
+}
+
+static unsigned long do_compress(void **pptr, unsigned long size)
+{
+ z_stream stream;
+ void *in, *out;
+ unsigned long maxsize;
+
+ memset(&stream, 0, sizeof(stream));
+ deflateInit(&stream, pack_compression_level);
+ maxsize = deflateBound(&stream, size);
+
+ in = *pptr;
+ out = xmalloc(maxsize);
+ *pptr = out;
+
+ stream.next_in = in;
+ stream.avail_in = size;
+ stream.next_out = out;
+ stream.avail_out = maxsize;
+ while (deflate(&stream, Z_FINISH) == Z_OK)
+ ; /* nothing */
+ deflateEnd(&stream);
+
+ free(in);
+ return stream.total_out;
+}
+
+/*
+ * we are going to reuse the existing object data as is. make
+ * sure it is not corrupt.
+ */
+static int check_pack_inflate(struct packed_git *p,
+ struct pack_window **w_curs,
+ off_t offset,
+ off_t len,
+ unsigned long expect)
+{
+ z_stream stream;
+ unsigned char fakebuf[4096], *in;
+ int st;
+
+ memset(&stream, 0, sizeof(stream));
+ git_inflate_init(&stream);
+ do {
+ in = use_pack(p, w_curs, offset, &stream.avail_in);
+ stream.next_in = in;
+ stream.next_out = fakebuf;
+ stream.avail_out = sizeof(fakebuf);
+ st = git_inflate(&stream, Z_FINISH);
+ offset += stream.next_in - in;
+ } while (st == Z_OK || st == Z_BUF_ERROR);
+ git_inflate_end(&stream);
+ return (st == Z_STREAM_END &&
+ stream.total_out == expect &&
+ stream.total_in == len) ? 0 : -1;
+}
+
+static void copy_pack_data(struct sha1file *f,
+ struct packed_git *p,
+ struct pack_window **w_curs,
+ off_t offset,
+ off_t len)
+{
+ unsigned char *in;
+ unsigned int avail;
+
+ while (len) {
+ in = use_pack(p, w_curs, offset, &avail);
+ if (avail > len)
+ avail = (unsigned int)len;
+ sha1write(f, in, avail);
+ offset += avail;
+ len -= avail;
+ }
+}
+
+static unsigned long write_object(struct sha1file *f,
+ struct object_entry *entry,
+ off_t write_offset)
+{
+ unsigned long size, limit, datalen;
+ void *buf;
+ unsigned char header[10], dheader[10];
+ unsigned hdrlen;
+ enum object_type type;
+ int usable_delta, to_reuse;
+
+ if (!pack_to_stdout)
+ crc32_begin(f);
+
+ type = entry->type;
+
+ /* apply size limit if limited packsize and not first object */
+ if (!pack_size_limit || !nr_written)
+ limit = 0;
+ else if (pack_size_limit <= write_offset)
+ /*
+ * the earlier object did not fit the limit; avoid
+ * mistaking this with unlimited (i.e. limit = 0).
+ */
+ limit = 1;
+ else
+ limit = pack_size_limit - write_offset;
+
+ if (!entry->delta)
+ usable_delta = 0; /* no delta */
+ else if (!pack_size_limit)
+ usable_delta = 1; /* unlimited packfile */
+ else if (entry->delta->idx.offset == (off_t)-1)
+ usable_delta = 0; /* base was written to another pack */
+ else if (entry->delta->idx.offset)
+ usable_delta = 1; /* base already exists in this pack */
+ else
+ usable_delta = 0; /* base could end up in another pack */
+
+ if (!reuse_object)
+ to_reuse = 0; /* explicit */
+ else if (!entry->in_pack)
+ to_reuse = 0; /* can't reuse what we don't have */
+ else if (type == OBJ_REF_DELTA || type == OBJ_OFS_DELTA)
+ /* check_object() decided it for us ... */
+ to_reuse = usable_delta;
+ /* ... but pack split may override that */
+ else if (type != entry->in_pack_type)
+ to_reuse = 0; /* pack has delta which is unusable */
+ else if (entry->delta)
+ to_reuse = 0; /* we want to pack afresh */
+ else
+ to_reuse = 1; /* we have it in-pack undeltified,
+ * and we do not need to deltify it.
+ */
+
+ if (!to_reuse) {
+ no_reuse:
+ if (!usable_delta) {
+ buf = read_sha1_file(entry->idx.sha1, &type, &size);
+ if (!buf)
+ die("unable to read %s", sha1_to_hex(entry->idx.sha1));
+ /*
+ * make sure no cached delta data remains from a
+ * previous attempt before a pack split occurred.
+ */
+ free(entry->delta_data);
+ entry->delta_data = NULL;
+ entry->z_delta_size = 0;
+ } else if (entry->delta_data) {
+ size = entry->delta_size;
+ buf = entry->delta_data;
+ entry->delta_data = NULL;
+ type = (allow_ofs_delta && entry->delta->idx.offset) ?
+ OBJ_OFS_DELTA : OBJ_REF_DELTA;
+ } else {
+ buf = get_delta(entry);
+ size = entry->delta_size;
+ type = (allow_ofs_delta && entry->delta->idx.offset) ?
+ OBJ_OFS_DELTA : OBJ_REF_DELTA;
+ }
+
+ if (entry->z_delta_size)
+ datalen = entry->z_delta_size;
+ else
+ datalen = do_compress(&buf, size);
+
+ /*
+ * The object header is a byte of 'type' followed by zero or
+ * more bytes of length.
+ */
+ hdrlen = encode_in_pack_object_header(type, size, header);
+
+ if (type == OBJ_OFS_DELTA) {
+ /*
+ * Deltas with relative base contain an additional
+ * encoding of the relative offset for the delta
+ * base from this object's position in the pack.
+ */
+ off_t ofs = entry->idx.offset - entry->delta->idx.offset;
+ unsigned pos = sizeof(dheader) - 1;
+ dheader[pos] = ofs & 127;
+ while (ofs >>= 7)
+ dheader[--pos] = 128 | (--ofs & 127);
+ if (limit && hdrlen + sizeof(dheader) - pos + datalen + 20 >= limit) {
+ free(buf);
+ return 0;
+ }
+ sha1write(f, header, hdrlen);
+ sha1write(f, dheader + pos, sizeof(dheader) - pos);
+ hdrlen += sizeof(dheader) - pos;
+ } else if (type == OBJ_REF_DELTA) {
+ /*
+ * Deltas with a base reference contain
+ * an additional 20 bytes for the base sha1.
+ */
+ if (limit && hdrlen + 20 + datalen + 20 >= limit) {
+ free(buf);
+ return 0;
+ }
+ sha1write(f, header, hdrlen);
+ sha1write(f, entry->delta->idx.sha1, 20);
+ hdrlen += 20;
+ } else {
+ if (limit && hdrlen + datalen + 20 >= limit) {
+ free(buf);
+ return 0;
+ }
+ sha1write(f, header, hdrlen);
+ }
+ sha1write(f, buf, datalen);
+ free(buf);
+ }
+ else {
+ struct packed_git *p = entry->in_pack;
+ struct pack_window *w_curs = NULL;
+ struct revindex_entry *revidx;
+ off_t offset;
+
+ if (entry->delta)
+ type = (allow_ofs_delta && entry->delta->idx.offset) ?
+ OBJ_OFS_DELTA : OBJ_REF_DELTA;
+ hdrlen = encode_in_pack_object_header(type, entry->size, header);
+
+ offset = entry->in_pack_offset;
+ revidx = find_pack_revindex(p, offset);
+ datalen = revidx[1].offset - offset;
+ if (!pack_to_stdout && p->index_version > 1 &&
+ check_pack_crc(p, &w_curs, offset, datalen, revidx->nr)) {
+ error("bad packed object CRC for %s", sha1_to_hex(entry->idx.sha1));
+ unuse_pack(&w_curs);
+ goto no_reuse;
+ }
+
+ offset += entry->in_pack_header_size;
+ datalen -= entry->in_pack_header_size;
+ if (!pack_to_stdout && p->index_version == 1 &&
+ check_pack_inflate(p, &w_curs, offset, datalen, entry->size)) {
+ error("corrupt packed object for %s", sha1_to_hex(entry->idx.sha1));
+ unuse_pack(&w_curs);
+ goto no_reuse;
+ }
+
+ if (type == OBJ_OFS_DELTA) {
+ off_t ofs = entry->idx.offset - entry->delta->idx.offset;
+ unsigned pos = sizeof(dheader) - 1;
+ dheader[pos] = ofs & 127;
+ while (ofs >>= 7)
+ dheader[--pos] = 128 | (--ofs & 127);
+ if (limit && hdrlen + sizeof(dheader) - pos + datalen + 20 >= limit) {
+ unuse_pack(&w_curs);
+ return 0;
+ }
+ sha1write(f, header, hdrlen);
+ sha1write(f, dheader + pos, sizeof(dheader) - pos);
+ hdrlen += sizeof(dheader) - pos;
+ reused_delta++;
+ } else if (type == OBJ_REF_DELTA) {
+ if (limit && hdrlen + 20 + datalen + 20 >= limit) {
+ unuse_pack(&w_curs);
+ return 0;
+ }
+ sha1write(f, header, hdrlen);
+ sha1write(f, entry->delta->idx.sha1, 20);
+ hdrlen += 20;
+ reused_delta++;
+ } else {
+ if (limit && hdrlen + datalen + 20 >= limit) {
+ unuse_pack(&w_curs);
+ return 0;
+ }
+ sha1write(f, header, hdrlen);
+ }
+ copy_pack_data(f, p, &w_curs, offset, datalen);
+ unuse_pack(&w_curs);
+ reused++;
+ }
+ if (usable_delta)
+ written_delta++;
+ written++;
+ if (!pack_to_stdout)
+ entry->idx.crc32 = crc32_end(f);
+ return hdrlen + datalen;
+}
+
+static int write_one(struct sha1file *f,
+ struct object_entry *e,
+ off_t *offset)
+{
+ unsigned long size;
+
+ /* offset is non zero if object is written already. */
+ if (e->idx.offset || e->preferred_base)
+ return -1;
+
+ /* if we are deltified, write out base object first. */
+ if (e->delta && !write_one(f, e->delta, offset))
+ return 0;
+
+ e->idx.offset = *offset;
+ size = write_object(f, e, *offset);
+ if (!size) {
+ e->idx.offset = 0;
+ return 0;
+ }
+ written_list[nr_written++] = &e->idx;
+
+ /* make sure off_t is sufficiently large not to wrap */
+ if (*offset > *offset + size)
+ die("pack too large for current definition of off_t");
+ *offset += size;
+ return 1;
+}
+
+static void write_pack_file(void)
+{
+ uint32_t i = 0, j;
+ struct sha1file *f;
+ off_t offset;
+ struct pack_header hdr;
+ uint32_t nr_remaining = nr_result;
+ time_t last_mtime = 0;
+
+ if (progress > pack_to_stdout)
+ progress_state = start_progress("Writing objects", nr_result);
+ written_list = xmalloc(nr_objects * sizeof(*written_list));
+
+ do {
+ unsigned char sha1[20];
+ char *pack_tmp_name = NULL;
+
+ if (pack_to_stdout) {
+ f = sha1fd_throughput(1, "<stdout>", progress_state);
+ } else {
+ char tmpname[PATH_MAX];
+ int fd;
+ fd = odb_mkstemp(tmpname, sizeof(tmpname),
+ "pack/tmp_pack_XXXXXX");
+ pack_tmp_name = xstrdup(tmpname);
+ f = sha1fd(fd, pack_tmp_name);
+ }
+
+ hdr.hdr_signature = htonl(PACK_SIGNATURE);
+ hdr.hdr_version = htonl(PACK_VERSION);
+ hdr.hdr_entries = htonl(nr_remaining);
+ sha1write(f, &hdr, sizeof(hdr));
+ offset = sizeof(hdr);
+ nr_written = 0;
+ for (; i < nr_objects; i++) {
+ if (!write_one(f, objects + i, &offset))
+ break;
+ display_progress(progress_state, written);
+ }
+
+ /*
+ * Did we write the wrong # entries in the header?
+ * If so, rewrite it like in fast-import
+ */
+ if (pack_to_stdout) {
+ sha1close(f, sha1, CSUM_CLOSE);
+ } else if (nr_written == nr_remaining) {
+ sha1close(f, sha1, CSUM_FSYNC);
+ } else {
+ int fd = sha1close(f, sha1, 0);
+ fixup_pack_header_footer(fd, sha1, pack_tmp_name,
+ nr_written, sha1, offset);
+ close(fd);
+ }
+
+ if (!pack_to_stdout) {
+ struct stat st;
+ const char *idx_tmp_name;
+ char tmpname[PATH_MAX];
+
+ idx_tmp_name = write_idx_file(NULL, written_list,
+ nr_written, sha1);
+
+ snprintf(tmpname, sizeof(tmpname), "%s-%s.pack",
+ base_name, sha1_to_hex(sha1));
+ free_pack_by_name(tmpname);
+ if (adjust_shared_perm(pack_tmp_name))
+ die_errno("unable to make temporary pack file readable");
+ if (rename(pack_tmp_name, tmpname))
+ die_errno("unable to rename temporary pack file");
+
+ /*
+ * Packs are runtime accessed in their mtime
+ * order since newer packs are more likely to contain
+ * younger objects. So if we are creating multiple
+ * packs then we should modify the mtime of later ones
+ * to preserve this property.
+ */
+ if (stat(tmpname, &st) < 0) {
+ warning("failed to stat %s: %s",
+ tmpname, strerror(errno));
+ } else if (!last_mtime) {
+ last_mtime = st.st_mtime;
+ } else {
+ struct utimbuf utb;
+ utb.actime = st.st_atime;
+ utb.modtime = --last_mtime;
+ if (utime(tmpname, &utb) < 0)
+ warning("failed utime() on %s: %s",
+ tmpname, strerror(errno));
+ }
+
+ snprintf(tmpname, sizeof(tmpname), "%s-%s.idx",
+ base_name, sha1_to_hex(sha1));
+ if (adjust_shared_perm(idx_tmp_name))
+ die_errno("unable to make temporary index file readable");
+ if (rename(idx_tmp_name, tmpname))
+ die_errno("unable to rename temporary index file");
+
+ free((void *) idx_tmp_name);
+ free(pack_tmp_name);
+ puts(sha1_to_hex(sha1));
+ }
+
+ /* mark written objects as written to previous pack */
+ for (j = 0; j < nr_written; j++) {
+ written_list[j]->offset = (off_t)-1;
+ }
+ nr_remaining -= nr_written;
+ } while (nr_remaining && i < nr_objects);
+
+ free(written_list);
+ stop_progress(&progress_state);
+ if (written != nr_result)
+ die("wrote %"PRIu32" objects while expecting %"PRIu32,
+ written, nr_result);
+}
+
+static int locate_object_entry_hash(const unsigned char *sha1)
+{
+ int i;
+ unsigned int ui;
+ memcpy(&ui, sha1, sizeof(unsigned int));
+ i = ui % object_ix_hashsz;
+ while (0 < object_ix[i]) {
+ if (!hashcmp(sha1, objects[object_ix[i] - 1].idx.sha1))
+ return i;
+ if (++i == object_ix_hashsz)
+ i = 0;
+ }
+ return -1 - i;
+}
+
+static struct object_entry *locate_object_entry(const unsigned char *sha1)
+{
+ int i;
+
+ if (!object_ix_hashsz)
+ return NULL;
+
+ i = locate_object_entry_hash(sha1);
+ if (0 <= i)
+ return &objects[object_ix[i]-1];
+ return NULL;
+}
+
+static void rehash_objects(void)
+{
+ uint32_t i;
+ struct object_entry *oe;
+
+ object_ix_hashsz = nr_objects * 3;
+ if (object_ix_hashsz < 1024)
+ object_ix_hashsz = 1024;
+ object_ix = xrealloc(object_ix, sizeof(int) * object_ix_hashsz);
+ memset(object_ix, 0, sizeof(int) * object_ix_hashsz);
+ for (i = 0, oe = objects; i < nr_objects; i++, oe++) {
+ int ix = locate_object_entry_hash(oe->idx.sha1);
+ if (0 <= ix)
+ continue;
+ ix = -1 - ix;
+ object_ix[ix] = i + 1;
+ }
+}
+
+static unsigned name_hash(const char *name)
+{
+ unsigned c, hash = 0;
+
+ if (!name)
+ return 0;
+
+ /*
+ * This effectively just creates a sortable number from the
+ * last sixteen non-whitespace characters. Last characters
+ * count "most", so things that end in ".c" sort together.
+ */
+ while ((c = *name++) != 0) {
+ if (isspace(c))
+ continue;
+ hash = (hash >> 2) + (c << 24);
+ }
+ return hash;
+}
+
+static void setup_delta_attr_check(struct git_attr_check *check)
+{
+ static struct git_attr *attr_delta;
+
+ if (!attr_delta)
+ attr_delta = git_attr("delta");
+
+ check[0].attr = attr_delta;
+}
+
+static int no_try_delta(const char *path)
+{
+ struct git_attr_check check[1];
+
+ setup_delta_attr_check(check);
+ if (git_checkattr(path, ARRAY_SIZE(check), check))
+ return 0;
+ if (ATTR_FALSE(check->value))
+ return 1;
+ return 0;
+}
+
+static int add_object_entry(const unsigned char *sha1, enum object_type type,
+ const char *name, int exclude)
+{
+ struct object_entry *entry;
+ struct packed_git *p, *found_pack = NULL;
+ off_t found_offset = 0;
+ int ix;
+ unsigned hash = name_hash(name);
+
+ ix = nr_objects ? locate_object_entry_hash(sha1) : -1;
+ if (ix >= 0) {
+ if (exclude) {
+ entry = objects + object_ix[ix] - 1;
+ if (!entry->preferred_base)
+ nr_result--;
+ entry->preferred_base = 1;
+ }
+ return 0;
+ }
+
+ if (!exclude && local && has_loose_object_nonlocal(sha1))
+ return 0;
+
+ for (p = packed_git; p; p = p->next) {
+ off_t offset = find_pack_entry_one(sha1, p);
+ if (offset) {
+ if (!found_pack) {
+ found_offset = offset;
+ found_pack = p;
+ }
+ if (exclude)
+ break;
+ if (incremental)
+ return 0;
+ if (local && !p->pack_local)
+ return 0;
+ if (ignore_packed_keep && p->pack_local && p->pack_keep)
+ return 0;
+ }
+ }
+
+ if (nr_objects >= nr_alloc) {
+ nr_alloc = (nr_alloc + 1024) * 3 / 2;
+ objects = xrealloc(objects, nr_alloc * sizeof(*entry));
+ }
+
+ entry = objects + nr_objects++;
+ memset(entry, 0, sizeof(*entry));
+ hashcpy(entry->idx.sha1, sha1);
+ entry->hash = hash;
+ if (type)
+ entry->type = type;
+ if (exclude)
+ entry->preferred_base = 1;
+ else
+ nr_result++;
+ if (found_pack) {
+ entry->in_pack = found_pack;
+ entry->in_pack_offset = found_offset;
+ }
+
+ if (object_ix_hashsz * 3 <= nr_objects * 4)
+ rehash_objects();
+ else
+ object_ix[-1 - ix] = nr_objects;
+
+ display_progress(progress_state, nr_objects);
+
+ if (name && no_try_delta(name))
+ entry->no_try_delta = 1;
+
+ return 1;
+}
+
+struct pbase_tree_cache {
+ unsigned char sha1[20];
+ int ref;
+ int temporary;
+ void *tree_data;
+ unsigned long tree_size;
+};
+
+static struct pbase_tree_cache *(pbase_tree_cache[256]);
+static int pbase_tree_cache_ix(const unsigned char *sha1)
+{
+ return sha1[0] % ARRAY_SIZE(pbase_tree_cache);
+}
+static int pbase_tree_cache_ix_incr(int ix)
+{
+ return (ix+1) % ARRAY_SIZE(pbase_tree_cache);
+}
+
+static struct pbase_tree {
+ struct pbase_tree *next;
+ /* This is a phony "cache" entry; we are not
+ * going to evict it nor find it through _get()
+ * mechanism -- this is for the toplevel node that
+ * would almost always change with any commit.
+ */
+ struct pbase_tree_cache pcache;
+} *pbase_tree;
+
+static struct pbase_tree_cache *pbase_tree_get(const unsigned char *sha1)
+{
+ struct pbase_tree_cache *ent, *nent;
+ void *data;
+ unsigned long size;
+ enum object_type type;
+ int neigh;
+ int my_ix = pbase_tree_cache_ix(sha1);
+ int available_ix = -1;
+
+ /* pbase-tree-cache acts as a limited hashtable.
+ * your object will be found at your index or within a few
+ * slots after that slot if it is cached.
+ */
+ for (neigh = 0; neigh < 8; neigh++) {
+ ent = pbase_tree_cache[my_ix];
+ if (ent && !hashcmp(ent->sha1, sha1)) {
+ ent->ref++;
+ return ent;
+ }
+ else if (((available_ix < 0) && (!ent || !ent->ref)) ||
+ ((0 <= available_ix) &&
+ (!ent && pbase_tree_cache[available_ix])))
+ available_ix = my_ix;
+ if (!ent)
+ break;
+ my_ix = pbase_tree_cache_ix_incr(my_ix);
+ }
+
+ /* Did not find one. Either we got a bogus request or
+ * we need to read and perhaps cache.
+ */
+ data = read_sha1_file(sha1, &type, &size);
+ if (!data)
+ return NULL;
+ if (type != OBJ_TREE) {
+ free(data);
+ return NULL;
+ }
+
+ /* We need to either cache or return a throwaway copy */
+
+ if (available_ix < 0)
+ ent = NULL;
+ else {
+ ent = pbase_tree_cache[available_ix];
+ my_ix = available_ix;
+ }
+
+ if (!ent) {
+ nent = xmalloc(sizeof(*nent));
+ nent->temporary = (available_ix < 0);
+ }
+ else {
+ /* evict and reuse */
+ free(ent->tree_data);
+ nent = ent;
+ }
+ hashcpy(nent->sha1, sha1);
+ nent->tree_data = data;
+ nent->tree_size = size;
+ nent->ref = 1;
+ if (!nent->temporary)
+ pbase_tree_cache[my_ix] = nent;
+ return nent;
+}
+
+static void pbase_tree_put(struct pbase_tree_cache *cache)
+{
+ if (!cache->temporary) {
+ cache->ref--;
+ return;
+ }
+ free(cache->tree_data);
+ free(cache);
+}
+
+static int name_cmp_len(const char *name)
+{
+ int i;
+ for (i = 0; name[i] && name[i] != '\n' && name[i] != '/'; i++)
+ ;
+ return i;
+}
+
+static void add_pbase_object(struct tree_desc *tree,
+ const char *name,
+ int cmplen,
+ const char *fullname)
+{
+ struct name_entry entry;
+ int cmp;
+
+ while (tree_entry(tree,&entry)) {
+ if (S_ISGITLINK(entry.mode))
+ continue;
+ cmp = tree_entry_len(entry.path, entry.sha1) != cmplen ? 1 :
+ memcmp(name, entry.path, cmplen);
+ if (cmp > 0)
+ continue;
+ if (cmp < 0)
+ return;
+ if (name[cmplen] != '/') {
+ add_object_entry(entry.sha1,
+ object_type(entry.mode),
+ fullname, 1);
+ return;
+ }
+ if (S_ISDIR(entry.mode)) {
+ struct tree_desc sub;
+ struct pbase_tree_cache *tree;
+ const char *down = name+cmplen+1;
+ int downlen = name_cmp_len(down);
+
+ tree = pbase_tree_get(entry.sha1);
+ if (!tree)
+ return;
+ init_tree_desc(&sub, tree->tree_data, tree->tree_size);
+
+ add_pbase_object(&sub, down, downlen, fullname);
+ pbase_tree_put(tree);
+ }
+ }
+}
+
+static unsigned *done_pbase_paths;
+static int done_pbase_paths_num;
+static int done_pbase_paths_alloc;
+static int done_pbase_path_pos(unsigned hash)
+{
+ int lo = 0;
+ int hi = done_pbase_paths_num;
+ while (lo < hi) {
+ int mi = (hi + lo) / 2;
+ if (done_pbase_paths[mi] == hash)
+ return mi;
+ if (done_pbase_paths[mi] < hash)
+ hi = mi;
+ else
+ lo = mi + 1;
+ }
+ return -lo-1;
+}
+
+static int check_pbase_path(unsigned hash)
+{
+ int pos = (!done_pbase_paths) ? -1 : done_pbase_path_pos(hash);
+ if (0 <= pos)
+ return 1;
+ pos = -pos - 1;
+ if (done_pbase_paths_alloc <= done_pbase_paths_num) {
+ done_pbase_paths_alloc = alloc_nr(done_pbase_paths_alloc);
+ done_pbase_paths = xrealloc(done_pbase_paths,
+ done_pbase_paths_alloc *
+ sizeof(unsigned));
+ }
+ done_pbase_paths_num++;
+ if (pos < done_pbase_paths_num)
+ memmove(done_pbase_paths + pos + 1,
+ done_pbase_paths + pos,
+ (done_pbase_paths_num - pos - 1) * sizeof(unsigned));
+ done_pbase_paths[pos] = hash;
+ return 0;
+}
+
+static void add_preferred_base_object(const char *name)
+{
+ struct pbase_tree *it;
+ int cmplen;
+ unsigned hash = name_hash(name);
+
+ if (!num_preferred_base || check_pbase_path(hash))
+ return;
+
+ cmplen = name_cmp_len(name);
+ for (it = pbase_tree; it; it = it->next) {
+ if (cmplen == 0) {
+ add_object_entry(it->pcache.sha1, OBJ_TREE, NULL, 1);
+ }
+ else {
+ struct tree_desc tree;
+ init_tree_desc(&tree, it->pcache.tree_data, it->pcache.tree_size);
+ add_pbase_object(&tree, name, cmplen, name);
+ }
+ }
+}
+
+static void add_preferred_base(unsigned char *sha1)
+{
+ struct pbase_tree *it;
+ void *data;
+ unsigned long size;
+ unsigned char tree_sha1[20];
+
+ if (window <= num_preferred_base++)
+ return;
+
+ data = read_object_with_reference(sha1, tree_type, &size, tree_sha1);
+ if (!data)
+ return;
+
+ for (it = pbase_tree; it; it = it->next) {
+ if (!hashcmp(it->pcache.sha1, tree_sha1)) {
+ free(data);
+ return;
+ }
+ }
+
+ it = xcalloc(1, sizeof(*it));
+ it->next = pbase_tree;
+ pbase_tree = it;
+
+ hashcpy(it->pcache.sha1, tree_sha1);
+ it->pcache.tree_data = data;
+ it->pcache.tree_size = size;
+}
+
+static void cleanup_preferred_base(void)
+{
+ struct pbase_tree *it;
+ unsigned i;
+
+ it = pbase_tree;
+ pbase_tree = NULL;
+ while (it) {
+ struct pbase_tree *this = it;
+ it = this->next;
+ free(this->pcache.tree_data);
+ free(this);
+ }
+
+ for (i = 0; i < ARRAY_SIZE(pbase_tree_cache); i++) {
+ if (!pbase_tree_cache[i])
+ continue;
+ free(pbase_tree_cache[i]->tree_data);
+ free(pbase_tree_cache[i]);
+ pbase_tree_cache[i] = NULL;
+ }
+
+ free(done_pbase_paths);
+ done_pbase_paths = NULL;
+ done_pbase_paths_num = done_pbase_paths_alloc = 0;
+}
+
+static void check_object(struct object_entry *entry)
+{
+ if (entry->in_pack) {
+ struct packed_git *p = entry->in_pack;
+ struct pack_window *w_curs = NULL;
+ const unsigned char *base_ref = NULL;
+ struct object_entry *base_entry;
+ unsigned long used, used_0;
+ unsigned int avail;
+ off_t ofs;
+ unsigned char *buf, c;
+
+ buf = use_pack(p, &w_curs, entry->in_pack_offset, &avail);
+
+ /*
+ * We want in_pack_type even if we do not reuse delta
+ * since non-delta representations could still be reused.
+ */
+ used = unpack_object_header_buffer(buf, avail,
+ &entry->in_pack_type,
+ &entry->size);
+ if (used == 0)
+ goto give_up;
+
+ /*
+ * Determine if this is a delta and if so whether we can
+ * reuse it or not. Otherwise let's find out as cheaply as
+ * possible what the actual type and size for this object is.
+ */
+ switch (entry->in_pack_type) {
+ default:
+ /* Not a delta hence we've already got all we need. */
+ entry->type = entry->in_pack_type;
+ entry->in_pack_header_size = used;
+ if (entry->type < OBJ_COMMIT || entry->type > OBJ_BLOB)
+ goto give_up;
+ unuse_pack(&w_curs);
+ return;
+ case OBJ_REF_DELTA:
+ if (reuse_delta && !entry->preferred_base)
+ base_ref = use_pack(p, &w_curs,
+ entry->in_pack_offset + used, NULL);
+ entry->in_pack_header_size = used + 20;
+ break;
+ case OBJ_OFS_DELTA:
+ buf = use_pack(p, &w_curs,
+ entry->in_pack_offset + used, NULL);
+ used_0 = 0;
+ c = buf[used_0++];
+ ofs = c & 127;
+ while (c & 128) {
+ ofs += 1;
+ if (!ofs || MSB(ofs, 7)) {
+ error("delta base offset overflow in pack for %s",
+ sha1_to_hex(entry->idx.sha1));
+ goto give_up;
+ }
+ c = buf[used_0++];
+ ofs = (ofs << 7) + (c & 127);
+ }
+ ofs = entry->in_pack_offset - ofs;
+ if (ofs <= 0 || ofs >= entry->in_pack_offset) {
+ error("delta base offset out of bound for %s",
+ sha1_to_hex(entry->idx.sha1));
+ goto give_up;
+ }
+ if (reuse_delta && !entry->preferred_base) {
+ struct revindex_entry *revidx;
+ revidx = find_pack_revindex(p, ofs);
+ if (!revidx)
+ goto give_up;
+ base_ref = nth_packed_object_sha1(p, revidx->nr);
+ }
+ entry->in_pack_header_size = used + used_0;
+ break;
+ }
+
+ if (base_ref && (base_entry = locate_object_entry(base_ref))) {
+ /*
+ * If base_ref was set above that means we wish to
+ * reuse delta data, and we even found that base
+ * in the list of objects we want to pack. Goodie!
+ *
+ * Depth value does not matter - find_deltas() will
+ * never consider reused delta as the base object to
+ * deltify other objects against, in order to avoid
+ * circular deltas.
+ */
+ entry->type = entry->in_pack_type;
+ entry->delta = base_entry;
+ entry->delta_size = entry->size;
+ entry->delta_sibling = base_entry->delta_child;
+ base_entry->delta_child = entry;
+ unuse_pack(&w_curs);
+ return;
+ }
+
+ if (entry->type) {
+ /*
+ * This must be a delta and we already know what the
+ * final object type is. Let's extract the actual
+ * object size from the delta header.
+ */
+ entry->size = get_size_from_delta(p, &w_curs,
+ entry->in_pack_offset + entry->in_pack_header_size);
+ if (entry->size == 0)
+ goto give_up;
+ unuse_pack(&w_curs);
+ return;
+ }
+
+ /*
+ * No choice but to fall back to the recursive delta walk
+ * with sha1_object_info() to find about the object type
+ * at this point...
+ */
+ give_up:
+ unuse_pack(&w_curs);
+ }
+
+ entry->type = sha1_object_info(entry->idx.sha1, &entry->size);
+ /*
+ * The error condition is checked in prepare_pack(). This is
+ * to permit a missing preferred base object to be ignored
+ * as a preferred base. Doing so can result in a larger
+ * pack file, but the transfer will still take place.
+ */
+}
+
+static int pack_offset_sort(const void *_a, const void *_b)
+{
+ const struct object_entry *a = *(struct object_entry **)_a;
+ const struct object_entry *b = *(struct object_entry **)_b;
+
+ /* avoid filesystem trashing with loose objects */
+ if (!a->in_pack && !b->in_pack)
+ return hashcmp(a->idx.sha1, b->idx.sha1);
+
+ if (a->in_pack < b->in_pack)
+ return -1;
+ if (a->in_pack > b->in_pack)
+ return 1;
+ return a->in_pack_offset < b->in_pack_offset ? -1 :
+ (a->in_pack_offset > b->in_pack_offset);
+}
+
+static void get_object_details(void)
+{
+ uint32_t i;
+ struct object_entry **sorted_by_offset;
+
+ sorted_by_offset = xcalloc(nr_objects, sizeof(struct object_entry *));
+ for (i = 0; i < nr_objects; i++)
+ sorted_by_offset[i] = objects + i;
+ qsort(sorted_by_offset, nr_objects, sizeof(*sorted_by_offset), pack_offset_sort);
+
+ for (i = 0; i < nr_objects; i++)
+ check_object(sorted_by_offset[i]);
+
+ free(sorted_by_offset);
+}
+
+/*
+ * We search for deltas in a list sorted by type, by filename hash, and then
+ * by size, so that we see progressively smaller and smaller files.
+ * That's because we prefer deltas to be from the bigger file
+ * to the smaller -- deletes are potentially cheaper, but perhaps
+ * more importantly, the bigger file is likely the more recent
+ * one. The deepest deltas are therefore the oldest objects which are
+ * less susceptible to be accessed often.
+ */
+static int type_size_sort(const void *_a, const void *_b)
+{
+ const struct object_entry *a = *(struct object_entry **)_a;
+ const struct object_entry *b = *(struct object_entry **)_b;
+
+ if (a->type > b->type)
+ return -1;
+ if (a->type < b->type)
+ return 1;
+ if (a->hash > b->hash)
+ return -1;
+ if (a->hash < b->hash)
+ return 1;
+ if (a->preferred_base > b->preferred_base)
+ return -1;
+ if (a->preferred_base < b->preferred_base)
+ return 1;
+ if (a->size > b->size)
+ return -1;
+ if (a->size < b->size)
+ return 1;
+ return a < b ? -1 : (a > b); /* newest first */
+}
+
+struct unpacked {
+ struct object_entry *entry;
+ void *data;
+ struct delta_index *index;
+ unsigned depth;
+};
+
+static int delta_cacheable(unsigned long src_size, unsigned long trg_size,
+ unsigned long delta_size)
+{
+ if (max_delta_cache_size && delta_cache_size + delta_size > max_delta_cache_size)
+ return 0;
+
+ if (delta_size < cache_max_small_delta_size)
+ return 1;
+
+ /* cache delta, if objects are large enough compared to delta size */
+ if ((src_size >> 20) + (trg_size >> 21) > (delta_size >> 10))
+ return 1;
+
+ return 0;
+}
+
+#ifndef NO_PTHREADS
+
+static pthread_mutex_t read_mutex;
+#define read_lock() pthread_mutex_lock(&read_mutex)
+#define read_unlock() pthread_mutex_unlock(&read_mutex)
+
+static pthread_mutex_t cache_mutex;
+#define cache_lock() pthread_mutex_lock(&cache_mutex)
+#define cache_unlock() pthread_mutex_unlock(&cache_mutex)
+
+static pthread_mutex_t progress_mutex;
+#define progress_lock() pthread_mutex_lock(&progress_mutex)
+#define progress_unlock() pthread_mutex_unlock(&progress_mutex)
+
+#else
+
+#define read_lock() (void)0
+#define read_unlock() (void)0
+#define cache_lock() (void)0
+#define cache_unlock() (void)0
+#define progress_lock() (void)0
+#define progress_unlock() (void)0
+
+#endif
+
+static int try_delta(struct unpacked *trg, struct unpacked *src,
+ unsigned max_depth, unsigned long *mem_usage)
+{
+ struct object_entry *trg_entry = trg->entry;
+ struct object_entry *src_entry = src->entry;
+ unsigned long trg_size, src_size, delta_size, sizediff, max_size, sz;
+ unsigned ref_depth;
+ enum object_type type;
+ void *delta_buf;
+
+ /* Don't bother doing diffs between different types */
+ if (trg_entry->type != src_entry->type)
+ return -1;
+
+ /*
+ * We do not bother to try a delta that we discarded
+ * on an earlier try, but only when reusing delta data.
+ */
+ if (reuse_delta && trg_entry->in_pack &&
+ trg_entry->in_pack == src_entry->in_pack &&
+ trg_entry->in_pack_type != OBJ_REF_DELTA &&
+ trg_entry->in_pack_type != OBJ_OFS_DELTA)
+ return 0;
+
+ /* Let's not bust the allowed depth. */
+ if (src->depth >= max_depth)
+ return 0;
+
+ /* Now some size filtering heuristics. */
+ trg_size = trg_entry->size;
+ if (!trg_entry->delta) {
+ max_size = trg_size/2 - 20;
+ ref_depth = 1;
+ } else {
+ max_size = trg_entry->delta_size;
+ ref_depth = trg->depth;
+ }
+ max_size = (uint64_t)max_size * (max_depth - src->depth) /
+ (max_depth - ref_depth + 1);
+ if (max_size == 0)
+ return 0;
+ src_size = src_entry->size;
+ sizediff = src_size < trg_size ? trg_size - src_size : 0;
+ if (sizediff >= max_size)
+ return 0;
+ if (trg_size < src_size / 32)
+ return 0;
+
+ /* Load data if not already done */
+ if (!trg->data) {
+ read_lock();
+ trg->data = read_sha1_file(trg_entry->idx.sha1, &type, &sz);
+ read_unlock();
+ if (!trg->data)
+ die("object %s cannot be read",
+ sha1_to_hex(trg_entry->idx.sha1));
+ if (sz != trg_size)
+ die("object %s inconsistent object length (%lu vs %lu)",
+ sha1_to_hex(trg_entry->idx.sha1), sz, trg_size);
+ *mem_usage += sz;
+ }
+ if (!src->data) {
+ read_lock();
+ src->data = read_sha1_file(src_entry->idx.sha1, &type, &sz);
+ read_unlock();
+ if (!src->data)
+ die("object %s cannot be read",
+ sha1_to_hex(src_entry->idx.sha1));
+ if (sz != src_size)
+ die("object %s inconsistent object length (%lu vs %lu)",
+ sha1_to_hex(src_entry->idx.sha1), sz, src_size);
+ *mem_usage += sz;
+ }
+ if (!src->index) {
+ src->index = create_delta_index(src->data, src_size);
+ if (!src->index) {
+ static int warned = 0;
+ if (!warned++)
+ warning("suboptimal pack - out of memory");
+ return 0;
+ }
+ *mem_usage += sizeof_delta_index(src->index);
+ }
+
+ delta_buf = create_delta(src->index, trg->data, trg_size, &delta_size, max_size);
+ if (!delta_buf)
+ return 0;
+
+ if (trg_entry->delta) {
+ /* Prefer only shallower same-sized deltas. */
+ if (delta_size == trg_entry->delta_size &&
+ src->depth + 1 >= trg->depth) {
+ free(delta_buf);
+ return 0;
+ }
+ }
+
+ /*
+ * Handle memory allocation outside of the cache
+ * accounting lock. Compiler will optimize the strangeness
+ * away when NO_PTHREADS is defined.
+ */
+ free(trg_entry->delta_data);
+ cache_lock();
+ if (trg_entry->delta_data) {
+ delta_cache_size -= trg_entry->delta_size;
+ trg_entry->delta_data = NULL;
+ }
+ if (delta_cacheable(src_size, trg_size, delta_size)) {
+ delta_cache_size += delta_size;
+ cache_unlock();
+ trg_entry->delta_data = xrealloc(delta_buf, delta_size);
+ } else {
+ cache_unlock();
+ free(delta_buf);
+ }
+
+ trg_entry->delta = src_entry;
+ trg_entry->delta_size = delta_size;
+ trg->depth = src->depth + 1;
+
+ return 1;
+}
+
+static unsigned int check_delta_limit(struct object_entry *me, unsigned int n)
+{
+ struct object_entry *child = me->delta_child;
+ unsigned int m = n;
+ while (child) {
+ unsigned int c = check_delta_limit(child, n + 1);
+ if (m < c)
+ m = c;
+ child = child->delta_sibling;
+ }
+ return m;
+}
+
+static unsigned long free_unpacked(struct unpacked *n)
+{
+ unsigned long freed_mem = sizeof_delta_index(n->index);
+ free_delta_index(n->index);
+ n->index = NULL;
+ if (n->data) {
+ freed_mem += n->entry->size;
+ free(n->data);
+ n->data = NULL;
+ }
+ n->entry = NULL;
+ n->depth = 0;
+ return freed_mem;
+}
+
+static void find_deltas(struct object_entry **list, unsigned *list_size,
+ int window, int depth, unsigned *processed)
+{
+ uint32_t i, idx = 0, count = 0;
+ struct unpacked *array;
+ unsigned long mem_usage = 0;
+
+ array = xcalloc(window, sizeof(struct unpacked));
+
+ for (;;) {
+ struct object_entry *entry;
+ struct unpacked *n = array + idx;
+ int j, max_depth, best_base = -1;
+
+ progress_lock();
+ if (!*list_size) {
+ progress_unlock();
+ break;
+ }
+ entry = *list++;
+ (*list_size)--;
+ if (!entry->preferred_base) {
+ (*processed)++;
+ display_progress(progress_state, *processed);
+ }
+ progress_unlock();
+
+ mem_usage -= free_unpacked(n);
+ n->entry = entry;
+
+ while (window_memory_limit &&
+ mem_usage > window_memory_limit &&
+ count > 1) {
+ uint32_t tail = (idx + window - count) % window;
+ mem_usage -= free_unpacked(array + tail);
+ count--;
+ }
+
+ /* We do not compute delta to *create* objects we are not
+ * going to pack.
+ */
+ if (entry->preferred_base)
+ goto next;
+
+ /*
+ * If the current object is at pack edge, take the depth the
+ * objects that depend on the current object into account
+ * otherwise they would become too deep.
+ */
+ max_depth = depth;
+ if (entry->delta_child) {
+ max_depth -= check_delta_limit(entry, 0);
+ if (max_depth <= 0)
+ goto next;
+ }
+
+ j = window;
+ while (--j > 0) {
+ int ret;
+ uint32_t other_idx = idx + j;
+ struct unpacked *m;
+ if (other_idx >= window)
+ other_idx -= window;
+ m = array + other_idx;
+ if (!m->entry)
+ break;
+ ret = try_delta(n, m, max_depth, &mem_usage);
+ if (ret < 0)
+ break;
+ else if (ret > 0)
+ best_base = other_idx;
+ }
+
+ /*
+ * If we decided to cache the delta data, then it is best
+ * to compress it right away. First because we have to do
+ * it anyway, and doing it here while we're threaded will
+ * save a lot of time in the non threaded write phase,
+ * as well as allow for caching more deltas within
+ * the same cache size limit.
+ * ...
+ * But only if not writing to stdout, since in that case
+ * the network is most likely throttling writes anyway,
+ * and therefore it is best to go to the write phase ASAP
+ * instead, as we can afford spending more time compressing
+ * between writes at that moment.
+ */
+ if (entry->delta_data && !pack_to_stdout) {
+ entry->z_delta_size = do_compress(&entry->delta_data,
+ entry->delta_size);
+ cache_lock();
+ delta_cache_size -= entry->delta_size;
+ delta_cache_size += entry->z_delta_size;
+ cache_unlock();
+ }
+
+ /* if we made n a delta, and if n is already at max
+ * depth, leaving it in the window is pointless. we
+ * should evict it first.
+ */
+ if (entry->delta && max_depth <= n->depth)
+ continue;
+
+ /*
+ * Move the best delta base up in the window, after the
+ * currently deltified object, to keep it longer. It will
+ * be the first base object to be attempted next.
+ */
+ if (entry->delta) {
+ struct unpacked swap = array[best_base];
+ int dist = (window + idx - best_base) % window;
+ int dst = best_base;
+ while (dist--) {
+ int src = (dst + 1) % window;
+ array[dst] = array[src];
+ dst = src;
+ }
+ array[dst] = swap;
+ }
+
+ next:
+ idx++;
+ if (count + 1 < window)
+ count++;
+ if (idx >= window)
+ idx = 0;
+ }
+
+ for (i = 0; i < window; ++i) {
+ free_delta_index(array[i].index);
+ free(array[i].data);
+ }
+ free(array);
+}
+
+#ifndef NO_PTHREADS
+
++static void try_to_free_from_threads(size_t size)
++{
++ read_lock();
++ release_pack_memory(size, -1);
++ read_unlock();
++}
++
+/*
+ * The main thread waits on the condition that (at least) one of the workers
+ * has stopped working (which is indicated in the .working member of
+ * struct thread_params).
+ * When a work thread has completed its work, it sets .working to 0 and
+ * signals the main thread and waits on the condition that .data_ready
+ * becomes 1.
+ */
+
+struct thread_params {
+ pthread_t thread;
+ struct object_entry **list;
+ unsigned list_size;
+ unsigned remaining;
+ int window;
+ int depth;
+ int working;
+ int data_ready;
+ pthread_mutex_t mutex;
+ pthread_cond_t cond;
+ unsigned *processed;
+};
+
+static pthread_cond_t progress_cond;
+
+/*
+ * Mutex and conditional variable can't be statically-initialized on Windows.
+ */
+static void init_threaded_search(void)
+{
++ init_recursive_mutex(&read_mutex);
+ pthread_mutex_init(&cache_mutex, NULL);
+ pthread_mutex_init(&progress_mutex, NULL);
+ pthread_cond_init(&progress_cond, NULL);
++ set_try_to_free_routine(try_to_free_from_threads);
+}
+
+static void cleanup_threaded_search(void)
+{
++ set_try_to_free_routine(NULL);
+ pthread_cond_destroy(&progress_cond);
+ pthread_mutex_destroy(&read_mutex);
+ pthread_mutex_destroy(&cache_mutex);
+ pthread_mutex_destroy(&progress_mutex);
+}
+
+static void *threaded_find_deltas(void *arg)
+{
+ struct thread_params *me = arg;
+
+ while (me->remaining) {
+ find_deltas(me->list, &me->remaining,
+ me->window, me->depth, me->processed);
+
+ progress_lock();
+ me->working = 0;
+ pthread_cond_signal(&progress_cond);
+ progress_unlock();
+
+ /*
+ * We must not set ->data_ready before we wait on the
+ * condition because the main thread may have set it to 1
+ * before we get here. In order to be sure that new
+ * work is available if we see 1 in ->data_ready, it
+ * was initialized to 0 before this thread was spawned
+ * and we reset it to 0 right away.
+ */
+ pthread_mutex_lock(&me->mutex);
+ while (!me->data_ready)
+ pthread_cond_wait(&me->cond, &me->mutex);
+ me->data_ready = 0;
+ pthread_mutex_unlock(&me->mutex);
+ }
+ /* leave ->working 1 so that this doesn't get more work assigned */
+ return NULL;
+}
+
+static void ll_find_deltas(struct object_entry **list, unsigned list_size,
+ int window, int depth, unsigned *processed)
+{
+ struct thread_params *p;
+ int i, ret, active_threads = 0;
+
+ init_threaded_search();
+
+ if (!delta_search_threads) /* --threads=0 means autodetect */
+ delta_search_threads = online_cpus();
+ if (delta_search_threads <= 1) {
+ find_deltas(list, &list_size, window, depth, processed);
+ cleanup_threaded_search();
+ return;
+ }
+ if (progress > pack_to_stdout)
+ fprintf(stderr, "Delta compression using up to %d threads.\n",
+ delta_search_threads);
+ p = xcalloc(delta_search_threads, sizeof(*p));
+
+ /* Partition the work amongst work threads. */
+ for (i = 0; i < delta_search_threads; i++) {
+ unsigned sub_size = list_size / (delta_search_threads - i);
+
+ /* don't use too small segments or no deltas will be found */
+ if (sub_size < 2*window && i+1 < delta_search_threads)
+ sub_size = 0;
+
+ p[i].window = window;
+ p[i].depth = depth;
+ p[i].processed = processed;
+ p[i].working = 1;
+ p[i].data_ready = 0;
+
+ /* try to split chunks on "path" boundaries */
+ while (sub_size && sub_size < list_size &&
+ list[sub_size]->hash &&
+ list[sub_size]->hash == list[sub_size-1]->hash)
+ sub_size++;
+
+ p[i].list = list;
+ p[i].list_size = sub_size;
+ p[i].remaining = sub_size;
+
+ list += sub_size;
+ list_size -= sub_size;
+ }
+
+ /* Start work threads. */
+ for (i = 0; i < delta_search_threads; i++) {
+ if (!p[i].list_size)
+ continue;
+ pthread_mutex_init(&p[i].mutex, NULL);
+ pthread_cond_init(&p[i].cond, NULL);
+ ret = pthread_create(&p[i].thread, NULL,
+ threaded_find_deltas, &p[i]);
+ if (ret)
+ die("unable to create thread: %s", strerror(ret));
+ active_threads++;
+ }
+
+ /*
+ * Now let's wait for work completion. Each time a thread is done
+ * with its work, we steal half of the remaining work from the
+ * thread with the largest number of unprocessed objects and give
+ * it to that newly idle thread. This ensure good load balancing
+ * until the remaining object list segments are simply too short
+ * to be worth splitting anymore.
+ */
+ while (active_threads) {
+ struct thread_params *target = NULL;
+ struct thread_params *victim = NULL;
+ unsigned sub_size = 0;
+
+ progress_lock();
+ for (;;) {
+ for (i = 0; !target && i < delta_search_threads; i++)
+ if (!p[i].working)
+ target = &p[i];
+ if (target)
+ break;
+ pthread_cond_wait(&progress_cond, &progress_mutex);
+ }
+
+ for (i = 0; i < delta_search_threads; i++)
+ if (p[i].remaining > 2*window &&
+ (!victim || victim->remaining < p[i].remaining))
+ victim = &p[i];
+ if (victim) {
+ sub_size = victim->remaining / 2;
+ list = victim->list + victim->list_size - sub_size;
+ while (sub_size && list[0]->hash &&
+ list[0]->hash == list[-1]->hash) {
+ list++;
+ sub_size--;
+ }
+ if (!sub_size) {
+ /*
+ * It is possible for some "paths" to have
+ * so many objects that no hash boundary
+ * might be found. Let's just steal the
+ * exact half in that case.
+ */
+ sub_size = victim->remaining / 2;
+ list -= sub_size;
+ }
+ target->list = list;
+ victim->list_size -= sub_size;
+ victim->remaining -= sub_size;
+ }
+ target->list_size = sub_size;
+ target->remaining = sub_size;
+ target->working = 1;
+ progress_unlock();
+
+ pthread_mutex_lock(&target->mutex);
+ target->data_ready = 1;
+ pthread_cond_signal(&target->cond);
+ pthread_mutex_unlock(&target->mutex);
+
+ if (!sub_size) {
+ pthread_join(target->thread, NULL);
+ pthread_cond_destroy(&target->cond);
+ pthread_mutex_destroy(&target->mutex);
+ active_threads--;
+ }
+ }
+ cleanup_threaded_search();
+ free(p);
+}
+
+#else
+#define ll_find_deltas(l, s, w, d, p) find_deltas(l, &s, w, d, p)
+#endif
+
+static int add_ref_tag(const char *path, const unsigned char *sha1, int flag, void *cb_data)
+{
+ unsigned char peeled[20];
+
+ if (!prefixcmp(path, "refs/tags/") && /* is a tag? */
+ !peel_ref(path, peeled) && /* peelable? */
+ !is_null_sha1(peeled) && /* annotated tag? */
+ locate_object_entry(peeled)) /* object packed? */
+ add_object_entry(sha1, OBJ_TAG, NULL, 0);
+ return 0;
+}
+
+static void prepare_pack(int window, int depth)
+{
+ struct object_entry **delta_list;
+ uint32_t i, nr_deltas;
+ unsigned n;
+
+ get_object_details();
+
+ /*
+ * If we're locally repacking then we need to be doubly careful
+ * from now on in order to make sure no stealth corruption gets
+ * propagated to the new pack. Clients receiving streamed packs
+ * should validate everything they get anyway so no need to incur
+ * the additional cost here in that case.
+ */
+ if (!pack_to_stdout)
+ do_check_packed_object_crc = 1;
+
+ if (!nr_objects || !window || !depth)
+ return;
+
+ delta_list = xmalloc(nr_objects * sizeof(*delta_list));
+ nr_deltas = n = 0;
+
+ for (i = 0; i < nr_objects; i++) {
+ struct object_entry *entry = objects + i;
+
+ if (entry->delta)
+ /* This happens if we decided to reuse existing
+ * delta from a pack. "reuse_delta &&" is implied.
+ */
+ continue;
+
+ if (entry->size < 50)
+ continue;
+
+ if (entry->no_try_delta)
+ continue;
+
+ if (!entry->preferred_base) {
+ nr_deltas++;
+ if (entry->type < 0)
+ die("unable to get type of object %s",
+ sha1_to_hex(entry->idx.sha1));
+ } else {
+ if (entry->type < 0) {
+ /*
+ * This object is not found, but we
+ * don't have to include it anyway.
+ */
+ continue;
+ }
+ }
+
+ delta_list[n++] = entry;
+ }
+
+ if (nr_deltas && n > 1) {
+ unsigned nr_done = 0;
+ if (progress)
+ progress_state = start_progress("Compressing objects",
+ nr_deltas);
+ qsort(delta_list, n, sizeof(*delta_list), type_size_sort);
+ ll_find_deltas(delta_list, n, window+1, depth, &nr_done);
+ stop_progress(&progress_state);
+ if (nr_done != nr_deltas)
+ die("inconsistency with delta count");
+ }
+ free(delta_list);
+}
+
+static int git_pack_config(const char *k, const char *v, void *cb)
+{
+ if (!strcmp(k, "pack.window")) {
+ window = git_config_int(k, v);
+ return 0;
+ }
+ if (!strcmp(k, "pack.windowmemory")) {
+ window_memory_limit = git_config_ulong(k, v);
+ return 0;
+ }
+ if (!strcmp(k, "pack.depth")) {
+ depth = git_config_int(k, v);
+ return 0;
+ }
+ if (!strcmp(k, "pack.compression")) {
+ int level = git_config_int(k, v);
+ if (level == -1)
+ level = Z_DEFAULT_COMPRESSION;
+ else if (level < 0 || level > Z_BEST_COMPRESSION)
+ die("bad pack compression level %d", level);
+ pack_compression_level = level;
+ pack_compression_seen = 1;
+ return 0;
+ }
+ if (!strcmp(k, "pack.deltacachesize")) {
+ max_delta_cache_size = git_config_int(k, v);
+ return 0;
+ }
+ if (!strcmp(k, "pack.deltacachelimit")) {
+ cache_max_small_delta_size = git_config_int(k, v);
+ return 0;
+ }
+ if (!strcmp(k, "pack.threads")) {
+ delta_search_threads = git_config_int(k, v);
+ if (delta_search_threads < 0)
+ die("invalid number of threads specified (%d)",
+ delta_search_threads);
+#ifdef NO_PTHREADS
+ if (delta_search_threads != 1)
+ warning("no threads support, ignoring %s", k);
+#endif
+ return 0;
+ }
+ if (!strcmp(k, "pack.indexversion")) {
+ pack_idx_default_version = git_config_int(k, v);
+ if (pack_idx_default_version > 2)
+ die("bad pack.indexversion=%"PRIu32,
+ pack_idx_default_version);
+ return 0;
+ }
+ if (!strcmp(k, "pack.packsizelimit")) {
+ pack_size_limit_cfg = git_config_ulong(k, v);
+ return 0;
+ }
+ return git_default_config(k, v, cb);
+}
+
+static void read_object_list_from_stdin(void)
+{
+ char line[40 + 1 + PATH_MAX + 2];
+ unsigned char sha1[20];
+
+ for (;;) {
+ if (!fgets(line, sizeof(line), stdin)) {
+ if (feof(stdin))
+ break;
+ if (!ferror(stdin))
+ die("fgets returned NULL, not EOF, not error!");
+ if (errno != EINTR)
+ die_errno("fgets");
+ clearerr(stdin);
+ continue;
+ }
+ if (line[0] == '-') {
+ if (get_sha1_hex(line+1, sha1))
+ die("expected edge sha1, got garbage:\n %s",
+ line);
+ add_preferred_base(sha1);
+ continue;
+ }
+ if (get_sha1_hex(line, sha1))
+ die("expected sha1, got garbage:\n %s", line);
+
+ add_preferred_base_object(line+41);
+ add_object_entry(sha1, 0, line+41, 0);
+ }
+}
+
+#define OBJECT_ADDED (1u<<20)
+
+static void show_commit(struct commit *commit, void *data)
+{
+ add_object_entry(commit->object.sha1, OBJ_COMMIT, NULL, 0);
+ commit->object.flags |= OBJECT_ADDED;
+}
+
+static void show_object(struct object *obj, const struct name_path *path, const char *last)
+{
+ char *name = path_name(path, last);
+
+ add_preferred_base_object(name);
+ add_object_entry(obj->sha1, obj->type, name, 0);
+ obj->flags |= OBJECT_ADDED;
+
+ /*
+ * We will have generated the hash from the name,
+ * but not saved a pointer to it - we can free it
+ */
+ free((char *)name);
+}
+
+static void show_edge(struct commit *commit)
+{
+ add_preferred_base(commit->object.sha1);
+}
+
+struct in_pack_object {
+ off_t offset;
+ struct object *object;
+};
+
+struct in_pack {
+ int alloc;
+ int nr;
+ struct in_pack_object *array;
+};
+
+static void mark_in_pack_object(struct object *object, struct packed_git *p, struct in_pack *in_pack)
+{
+ in_pack->array[in_pack->nr].offset = find_pack_entry_one(object->sha1, p);
+ in_pack->array[in_pack->nr].object = object;
+ in_pack->nr++;
+}
+
+/*
+ * Compare the objects in the offset order, in order to emulate the
+ * "git rev-list --objects" output that produced the pack originally.
+ */
+static int ofscmp(const void *a_, const void *b_)
+{
+ struct in_pack_object *a = (struct in_pack_object *)a_;
+ struct in_pack_object *b = (struct in_pack_object *)b_;
+
+ if (a->offset < b->offset)
+ return -1;
+ else if (a->offset > b->offset)
+ return 1;
+ else
+ return hashcmp(a->object->sha1, b->object->sha1);
+}
+
+static void add_objects_in_unpacked_packs(struct rev_info *revs)
+{
+ struct packed_git *p;
+ struct in_pack in_pack;
+ uint32_t i;
+
+ memset(&in_pack, 0, sizeof(in_pack));
+
+ for (p = packed_git; p; p = p->next) {
+ const unsigned char *sha1;
+ struct object *o;
+
+ if (!p->pack_local || p->pack_keep)
+ continue;
+ if (open_pack_index(p))
+ die("cannot open pack index");
+
+ ALLOC_GROW(in_pack.array,
+ in_pack.nr + p->num_objects,
+ in_pack.alloc);
+
+ for (i = 0; i < p->num_objects; i++) {
+ sha1 = nth_packed_object_sha1(p, i);
+ o = lookup_unknown_object(sha1);
+ if (!(o->flags & OBJECT_ADDED))
+ mark_in_pack_object(o, p, &in_pack);
+ o->flags |= OBJECT_ADDED;
+ }
+ }
+
+ if (in_pack.nr) {
+ qsort(in_pack.array, in_pack.nr, sizeof(in_pack.array[0]),
+ ofscmp);
+ for (i = 0; i < in_pack.nr; i++) {
+ struct object *o = in_pack.array[i].object;
+ add_object_entry(o->sha1, o->type, "", 0);
+ }
+ }
+ free(in_pack.array);
+}
+
+static int has_sha1_pack_kept_or_nonlocal(const unsigned char *sha1)
+{
+ static struct packed_git *last_found = (void *)1;
+ struct packed_git *p;
+
+ p = (last_found != (void *)1) ? last_found : packed_git;
+
+ while (p) {
+ if ((!p->pack_local || p->pack_keep) &&
+ find_pack_entry_one(sha1, p)) {
+ last_found = p;
+ return 1;
+ }
+ if (p == last_found)
+ p = packed_git;
+ else
+ p = p->next;
+ if (p == last_found)
+ p = p->next;
+ }
+ return 0;
+}
+
+static void loosen_unused_packed_objects(struct rev_info *revs)
+{
+ struct packed_git *p;
+ uint32_t i;
+ const unsigned char *sha1;
+
+ for (p = packed_git; p; p = p->next) {
+ if (!p->pack_local || p->pack_keep)
+ continue;
+
+ if (open_pack_index(p))
+ die("cannot open pack index");
+
+ for (i = 0; i < p->num_objects; i++) {
+ sha1 = nth_packed_object_sha1(p, i);
+ if (!locate_object_entry(sha1) &&
+ !has_sha1_pack_kept_or_nonlocal(sha1))
+ if (force_object_loose(sha1, p->mtime))
+ die("unable to force loose object");
+ }
+ }
+}
+
+static void get_object_list(int ac, const char **av)
+{
+ struct rev_info revs;
+ char line[1000];
+ int flags = 0;
+
+ init_revisions(&revs, NULL);
+ save_commit_buffer = 0;
+ setup_revisions(ac, av, &revs, NULL);
+
+ while (fgets(line, sizeof(line), stdin) != NULL) {
+ int len = strlen(line);
+ if (len && line[len - 1] == '\n')
+ line[--len] = 0;
+ if (!len)
+ break;
+ if (*line == '-') {
+ if (!strcmp(line, "--not")) {
+ flags ^= UNINTERESTING;
+ continue;
+ }
+ die("not a rev '%s'", line);
+ }
+ if (handle_revision_arg(line, &revs, flags, 1))
+ die("bad revision '%s'", line);
+ }
+
+ if (prepare_revision_walk(&revs))
+ die("revision walk setup failed");
+ mark_edges_uninteresting(revs.commits, &revs, show_edge);
+ traverse_commit_list(&revs, show_commit, show_object, NULL);
+
+ if (keep_unreachable)
+ add_objects_in_unpacked_packs(&revs);
+ if (unpack_unreachable)
+ loosen_unused_packed_objects(&revs);
+}
+
+int cmd_pack_objects(int argc, const char **argv, const char *prefix)
+{
+ int use_internal_rev_list = 0;
+ int thin = 0;
+ int all_progress_implied = 0;
+ uint32_t i;
+ const char **rp_av;
+ int rp_ac_alloc = 64;
+ int rp_ac;
+
+ read_replace_refs = 0;
+
+ rp_av = xcalloc(rp_ac_alloc, sizeof(*rp_av));
+
+ rp_av[0] = "pack-objects";
+ rp_av[1] = "--objects"; /* --thin will make it --objects-edge */
+ rp_ac = 2;
+
+ git_config(git_pack_config, NULL);
+ if (!pack_compression_seen && core_compression_seen)
+ pack_compression_level = core_compression_level;
+
+ progress = isatty(2);
+ for (i = 1; i < argc; i++) {
+ const char *arg = argv[i];
+
+ if (*arg != '-')
+ break;
+
+ if (!strcmp("--non-empty", arg)) {
+ non_empty = 1;
+ continue;
+ }
+ if (!strcmp("--local", arg)) {
+ local = 1;
+ continue;
+ }
+ if (!strcmp("--incremental", arg)) {
+ incremental = 1;
+ continue;
+ }
+ if (!strcmp("--honor-pack-keep", arg)) {
+ ignore_packed_keep = 1;
+ continue;
+ }
+ if (!prefixcmp(arg, "--compression=")) {
+ char *end;
+ int level = strtoul(arg+14, &end, 0);
+ if (!arg[14] || *end)
+ usage(pack_usage);
+ if (level == -1)
+ level = Z_DEFAULT_COMPRESSION;
+ else if (level < 0 || level > Z_BEST_COMPRESSION)
+ die("bad pack compression level %d", level);
+ pack_compression_level = level;
+ continue;
+ }
+ if (!prefixcmp(arg, "--max-pack-size=")) {
+ pack_size_limit_cfg = 0;
+ if (!git_parse_ulong(arg+16, &pack_size_limit))
+ usage(pack_usage);
+ continue;
+ }
+ if (!prefixcmp(arg, "--window=")) {
+ char *end;
+ window = strtoul(arg+9, &end, 0);
+ if (!arg[9] || *end)
+ usage(pack_usage);
+ continue;
+ }
+ if (!prefixcmp(arg, "--window-memory=")) {
+ if (!git_parse_ulong(arg+16, &window_memory_limit))
+ usage(pack_usage);
+ continue;
+ }
+ if (!prefixcmp(arg, "--threads=")) {
+ char *end;
+ delta_search_threads = strtoul(arg+10, &end, 0);
+ if (!arg[10] || *end || delta_search_threads < 0)
+ usage(pack_usage);
+#ifdef NO_PTHREADS
+ if (delta_search_threads != 1)
+ warning("no threads support, "
+ "ignoring %s", arg);
+#endif
+ continue;
+ }
+ if (!prefixcmp(arg, "--depth=")) {
+ char *end;
+ depth = strtoul(arg+8, &end, 0);
+ if (!arg[8] || *end)
+ usage(pack_usage);
+ continue;
+ }
+ if (!strcmp("--progress", arg)) {
+ progress = 1;
+ continue;
+ }
+ if (!strcmp("--all-progress", arg)) {
+ progress = 2;
+ continue;
+ }
+ if (!strcmp("--all-progress-implied", arg)) {
+ all_progress_implied = 1;
+ continue;
+ }
+ if (!strcmp("-q", arg)) {
+ progress = 0;
+ continue;
+ }
+ if (!strcmp("--no-reuse-delta", arg)) {
+ reuse_delta = 0;
+ continue;
+ }
+ if (!strcmp("--no-reuse-object", arg)) {
+ reuse_object = reuse_delta = 0;
+ continue;
+ }
+ if (!strcmp("--delta-base-offset", arg)) {
+ allow_ofs_delta = 1;
+ continue;
+ }
+ if (!strcmp("--stdout", arg)) {
+ pack_to_stdout = 1;
+ continue;
+ }
+ if (!strcmp("--revs", arg)) {
+ use_internal_rev_list = 1;
+ continue;
+ }
+ if (!strcmp("--keep-unreachable", arg)) {
+ keep_unreachable = 1;
+ continue;
+ }
+ if (!strcmp("--unpack-unreachable", arg)) {
+ unpack_unreachable = 1;
+ continue;
+ }
+ if (!strcmp("--include-tag", arg)) {
+ include_tag = 1;
+ continue;
+ }
+ if (!strcmp("--unpacked", arg) ||
+ !strcmp("--reflog", arg) ||
+ !strcmp("--all", arg)) {
+ use_internal_rev_list = 1;
+ if (rp_ac >= rp_ac_alloc - 1) {
+ rp_ac_alloc = alloc_nr(rp_ac_alloc);
+ rp_av = xrealloc(rp_av,
+ rp_ac_alloc * sizeof(*rp_av));
+ }
+ rp_av[rp_ac++] = arg;
+ continue;
+ }
+ if (!strcmp("--thin", arg)) {
+ use_internal_rev_list = 1;
+ thin = 1;
+ rp_av[1] = "--objects-edge";
+ continue;
+ }
+ if (!prefixcmp(arg, "--index-version=")) {
+ char *c;
+ pack_idx_default_version = strtoul(arg + 16, &c, 10);
+ if (pack_idx_default_version > 2)
+ die("bad %s", arg);
+ if (*c == ',')
+ pack_idx_off32_limit = strtoul(c+1, &c, 0);
+ if (*c || pack_idx_off32_limit & 0x80000000)
+ die("bad %s", arg);
+ continue;
+ }
+ if (!strcmp(arg, "--keep-true-parents")) {
+ grafts_replace_parents = 0;
+ continue;
+ }
+ usage(pack_usage);
+ }
+
+ /* Traditionally "pack-objects [options] base extra" failed;
+ * we would however want to take refs parameter that would
+ * have been given to upstream rev-list ourselves, which means
+ * we somehow want to say what the base name is. So the
+ * syntax would be:
+ *
+ * pack-objects [options] base <refs...>
+ *
+ * in other words, we would treat the first non-option as the
+ * base_name and send everything else to the internal revision
+ * walker.
+ */
+
+ if (!pack_to_stdout)
+ base_name = argv[i++];
+
+ if (pack_to_stdout != !base_name)
+ usage(pack_usage);
+
+ if (!pack_to_stdout && !pack_size_limit)
+ pack_size_limit = pack_size_limit_cfg;
+ if (pack_to_stdout && pack_size_limit)
+ die("--max-pack-size cannot be used to build a pack for transfer.");
+ if (pack_size_limit && pack_size_limit < 1024*1024) {
+ warning("minimum pack size limit is 1 MiB");
+ pack_size_limit = 1024*1024;
+ }
+
+ if (!pack_to_stdout && thin)
+ die("--thin cannot be used to build an indexable pack.");
+
+ if (keep_unreachable && unpack_unreachable)
+ die("--keep-unreachable and --unpack-unreachable are incompatible.");
+
+ if (progress && all_progress_implied)
+ progress = 2;
+
+ prepare_packed_git();
+
+ if (progress)
+ progress_state = start_progress("Counting objects", 0);
+ if (!use_internal_rev_list)
+ read_object_list_from_stdin();
+ else {
+ rp_av[rp_ac] = NULL;
+ get_object_list(rp_ac, rp_av);
+ }
+ cleanup_preferred_base();
+ if (include_tag && nr_result)
+ for_each_ref(add_ref_tag, NULL);
+ stop_progress(&progress_state);
+
+ if (non_empty && !nr_result)
+ return 0;
+ if (nr_result)
+ prepare_pack(window, depth);
+ write_pack_file();
+ if (progress)
+ fprintf(stderr, "Total %"PRIu32" (delta %"PRIu32"),"
+ " reused %"PRIu32" (delta %"PRIu32")\n",
+ written, written_delta, reused, reused_delta);
+ return 0;
+}
diff --cc git-compat-util.h
index b96912b5d36e971212e219f038b62bfcb7bdbd14,1c171db8b1fb46c5230280b0ebd872c8f23cf7c0..c4f4e15036577bc0c55d19cef26fd0ce26b233ad
--- 1/git-compat-util.h
--- 2/git-compat-util.h
+++ b/git-compat-util.h
}
#endif
+#ifndef HAVE_MEMPCPY
+#define mempcpy gitmempcpy
+static inline void *gitmempcpy(void *dest, const void *src, size_t n)
+{
+ return (char *)memcpy(dest, src, n) + n;
+}
+#endif
+
extern void release_pack_memory(size_t, int);
+ extern void set_try_to_free_routine(void (*routine)(size_t));
+
extern char *xstrdup(const char *str);
extern void *xmalloc(size_t size);
extern void *xmallocz(size_t size);