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index fbb79d70a93dd0c6c46a1d24505e55f737d44189..da992dd4851dd67ab9a307c1b08ebed442e406cb 100644 (file)
--- a/diff.c
+++ b/diff.c
#include "delta.h"
#include "xdiff-interface.h"
#include "color.h"
+#include "attr.h"
#ifdef NO_FAST_WORKING_DIRECTORY
#define FAST_WORKING_DIRECTORY 0
#define FAST_WORKING_DIRECTORY 1
#endif
-static int use_size_cache;
-
static int diff_detect_rename_default;
static int diff_rename_limit_default = -1;
static int diff_use_color_default;
die("bad config variable '%s'", var);
}
+static struct ll_diff_driver {
+ const char *name;
+ struct ll_diff_driver *next;
+ char *cmd;
+} *user_diff, **user_diff_tail;
+
+/*
+ * Currently there is only "diff.<drivername>.command" variable;
+ * because there are "diff.color.<slot>" variables, we are parsing
+ * this in a bit convoluted way to allow low level diff driver
+ * called "color".
+ */
+static int parse_lldiff_command(const char *var, const char *ep, const char *value)
+{
+ const char *name;
+ int namelen;
+ struct ll_diff_driver *drv;
+
+ name = var + 5;
+ namelen = ep - name;
+ for (drv = user_diff; drv; drv = drv->next)
+ if (!strncmp(drv->name, name, namelen) && !drv->name[namelen])
+ break;
+ if (!drv) {
+ char *namebuf;
+ drv = xcalloc(1, sizeof(struct ll_diff_driver));
+ namebuf = xmalloc(namelen + 1);
+ memcpy(namebuf, name, namelen);
+ namebuf[namelen] = 0;
+ drv->name = namebuf;
+ drv->next = NULL;
+ if (!user_diff_tail)
+ user_diff_tail = &user_diff;
+ *user_diff_tail = drv;
+ user_diff_tail = &(drv->next);
+ }
+
+ if (!value)
+ return error("%s: lacks value", var);
+ drv->cmd = strdup(value);
+ return 0;
+}
+
/*
* These are to give UI layer defaults.
* The core-level commands such as git-diff-files should
diff_detect_rename_default = DIFF_DETECT_RENAME;
return 0;
}
+ if (!prefixcmp(var, "diff.")) {
+ const char *ep = strrchr(var, '.');
+
+ if (ep != var + 4 && !strcmp(ep, ".command"))
+ return parse_lldiff_command(var, ep, value);
+ }
if (!prefixcmp(var, "diff.color.") || !prefixcmp(var, "color.diff.")) {
int slot = parse_diff_color_slot(var, 11);
color_parse(value, var, diff_colors[slot]);
return 0;
}
+
return git_default_config(var, value);
}
return external_diff_cmd;
}
-#define TEMPFILE_PATH_LEN 50
-
static struct diff_tempfile {
const char *name; /* filename external diff should read from */
char hex[41];
char mode[10];
- char tmp_path[TEMPFILE_PATH_LEN];
+ char tmp_path[PATH_MAX];
} diff_temp[2];
static int count_lines(const char *data, int size)
emit_binary_diff_body(two, one);
}
-#define FIRST_FEW_BYTES 8000
-static int mmfile_is_binary(mmfile_t *mf)
+static void setup_diff_attr_check(struct git_attr_check *check)
{
- long sz = mf->size;
- if (FIRST_FEW_BYTES < sz)
- sz = FIRST_FEW_BYTES;
- return !!memchr(mf->ptr, 0, sz);
+ static struct git_attr *attr_diff;
+
+ if (!attr_diff)
+ attr_diff = git_attr("diff", 4);
+ check->attr = attr_diff;
+}
+
+static int file_is_binary(struct diff_filespec *one)
+{
+ struct git_attr_check attr_diff_check;
+
+ setup_diff_attr_check(&attr_diff_check);
+ if (!git_checkattr(one->path, 1, &attr_diff_check)) {
+ const char *value = attr_diff_check.value;
+ if (ATTR_TRUE(value))
+ return 0;
+ else if (ATTR_FALSE(value))
+ return 1;
+ }
+
+ if (!one->data) {
+ if (!DIFF_FILE_VALID(one))
+ return 0;
+ diff_populate_filespec(one, 0);
+ }
+ return buffer_is_binary(one->data, one->size);
}
static void builtin_diff(const char *name_a,
if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0)
die("unable to read files to diff");
- if (!o->text && (mmfile_is_binary(&mf1) || mmfile_is_binary(&mf2))) {
+ if (!o->text && (file_is_binary(one) || file_is_binary(two))) {
/* Quite common confusing case */
if (mf1.size == mf2.size &&
!memcmp(mf1.ptr, mf2.ptr, mf1.size))
}
free_ab_and_return:
+ diff_free_filespec_data(one);
+ diff_free_filespec_data(two);
free(a_one);
free(b_two);
return;
diff_populate_filespec(two, 0);
data->deleted = count_lines(one->data, one->size);
data->added = count_lines(two->data, two->size);
- return;
+ goto free_and_return;
}
if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0)
die("unable to read files to diff");
- if (mmfile_is_binary(&mf1) || mmfile_is_binary(&mf2)) {
+ if (file_is_binary(one) || file_is_binary(two)) {
data->is_binary = 1;
data->added = mf2.size;
data->deleted = mf1.size;
ecb.priv = diffstat;
xdl_diff(&mf1, &mf2, &xpp, &xecfg, &ecb);
}
+
+ free_and_return:
+ diff_free_filespec_data(one);
+ diff_free_filespec_data(two);
}
static void builtin_checkdiff(const char *name_a, const char *name_b,
if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0)
die("unable to read files to diff");
- if (mmfile_is_binary(&mf2))
- return;
+ if (file_is_binary(two))
+ goto free_and_return;
else {
/* Crazy xdl interfaces.. */
xpparam_t xpp;
ecb.priv = &data;
xdl_diff(&mf1, &mf2, &xpp, &xecfg, &ecb);
}
+ free_and_return:
+ diff_free_filespec_data(one);
+ diff_free_filespec_data(two);
}
struct diff_filespec *alloc_filespec(const char *path)
}
/*
- * Given a name and sha1 pair, if the dircache tells us the file in
+ * Given a name and sha1 pair, if the index tells us the file in
* the work tree has that object contents, return true, so that
* prepare_temp_file() does not have to inflate and extract.
*/
@@ -1322,61 +1399,12 @@ static int reuse_worktree_file(const char *name, const unsigned char *sha1, int
return 1;
}
-static struct sha1_size_cache {
- unsigned char sha1[20];
- unsigned long size;
-} **sha1_size_cache;
-static int sha1_size_cache_nr, sha1_size_cache_alloc;
-
-static struct sha1_size_cache *locate_size_cache(unsigned char *sha1,
- int find_only,
- unsigned long size)
-{
- int first, last;
- struct sha1_size_cache *e;
-
- first = 0;
- last = sha1_size_cache_nr;
- while (last > first) {
- int cmp, next = (last + first) >> 1;
- e = sha1_size_cache[next];
- cmp = hashcmp(e->sha1, sha1);
- if (!cmp)
- return e;
- if (cmp < 0) {
- last = next;
- continue;
- }
- first = next+1;
- }
- /* not found */
- if (find_only)
- return NULL;
- /* insert to make it at "first" */
- if (sha1_size_cache_alloc <= sha1_size_cache_nr) {
- sha1_size_cache_alloc = alloc_nr(sha1_size_cache_alloc);
- sha1_size_cache = xrealloc(sha1_size_cache,
- sha1_size_cache_alloc *
- sizeof(*sha1_size_cache));
- }
- sha1_size_cache_nr++;
- if (first < sha1_size_cache_nr)
- memmove(sha1_size_cache + first + 1, sha1_size_cache + first,
- (sha1_size_cache_nr - first - 1) *
- sizeof(*sha1_size_cache));
- e = xmalloc(sizeof(struct sha1_size_cache));
- sha1_size_cache[first] = e;
- hashcpy(e->sha1, sha1);
- e->size = size;
- return e;
-}
-
static int populate_from_stdin(struct diff_filespec *s)
{
#define INCREMENT 1024
char *buf;
unsigned long size;
- int got;
+ ssize_t got;
size = 0;
buf = NULL;
return 0;
}
+static int diff_populate_gitlink(struct diff_filespec *s, int size_only)
+{
+ int len;
+ char *data = xmalloc(100);
+ len = snprintf(data, 100,
+ "Subproject commit %s\n", sha1_to_hex(s->sha1));
+ s->data = data;
+ s->size = len;
+ s->should_free = 1;
+ if (size_only) {
+ s->data = NULL;
+ free(data);
+ }
+ return 0;
+}
+
/*
* While doing rename detection and pickaxe operation, we may need to
* grab the data for the blob (or file) for our own in-core comparison.
if (S_ISDIR(s->mode))
return -1;
- if (!use_size_cache)
- size_only = 0;
-
if (s->data)
- return err;
+ return 0;
+
+ if (size_only && 0 < s->size)
+ return 0;
+
+ if (S_ISDIRLNK(s->mode))
+ return diff_populate_gitlink(s, size_only);
+
if (!s->sha1_valid ||
reuse_worktree_file(s->path, s->sha1, 0)) {
struct stat st;
/*
* Convert from working tree format to canonical git format
*/
- buf = s->data;
size = s->size;
- if (convert_to_git(s->path, &buf, &size)) {
+ buf = convert_to_git(s->path, s->data, &size);
+ if (buf) {
munmap(s->data, s->size);
s->should_munmap = 0;
s->data = buf;
}
else {
enum object_type type;
- struct sha1_size_cache *e;
-
- if (size_only) {
- e = locate_size_cache(s->sha1, 1, 0);
- if (e) {
- s->size = e->size;
- return 0;
- }
+ if (size_only)
type = sha1_object_info(s->sha1, &s->size);
- if (type < 0)
- locate_size_cache(s->sha1, 0, s->size);
- }
else {
s->data = read_sha1_file(s->sha1, &type, &s->size);
s->should_free = 1;
free(s->data);
else if (s->should_munmap)
munmap(s->data, s->size);
- s->should_free = s->should_munmap = 0;
- s->data = NULL;
+
+ if (s->should_free || s->should_munmap) {
+ s->should_free = s->should_munmap = 0;
+ s->data = NULL;
+ }
free(s->cnt_data);
s->cnt_data = NULL;
}
{
int fd;
- fd = git_mkstemp(temp->tmp_path, TEMPFILE_PATH_LEN, ".diff_XXXXXX");
+ fd = git_mkstemp(temp->tmp_path, PATH_MAX, ".diff_XXXXXX");
if (fd < 0)
die("unable to create temp-file");
if (write_in_full(fd, blob, size) != size)
}
}
+static const char *external_diff_attr(const char *name)
+{
+ struct git_attr_check attr_diff_check;
+
+ setup_diff_attr_check(&attr_diff_check);
+ if (!git_checkattr(name, 1, &attr_diff_check)) {
+ const char *value = attr_diff_check.value;
+ if (!ATTR_TRUE(value) &&
+ !ATTR_FALSE(value) &&
+ !ATTR_UNSET(value)) {
+ struct ll_diff_driver *drv;
+
+ if (!user_diff_tail) {
+ user_diff_tail = &user_diff;
+ git_config(git_diff_ui_config);
+ }
+ for (drv = user_diff; drv; drv = drv->next)
+ if (!strcmp(drv->name, value))
+ return drv->cmd;
+ }
+ }
+ return NULL;
+}
+
static void run_diff_cmd(const char *pgm,
const char *name,
const char *other,
struct diff_options *o,
int complete_rewrite)
{
+ if (!o->allow_external)
+ pgm = NULL;
+ else {
+ const char *cmd = external_diff_attr(name);
+ if (cmd)
+ pgm = cmd;
+ }
+
if (pgm) {
run_external_diff(pgm, name, other, one, two, xfrm_msg,
complete_rewrite);
if (o->binary) {
mmfile_t mf;
- if ((!fill_mmfile(&mf, one) && mmfile_is_binary(&mf)) ||
- (!fill_mmfile(&mf, two) && mmfile_is_binary(&mf)))
+ if ((!fill_mmfile(&mf, one) && file_is_binary(one)) ||
+ (!fill_mmfile(&mf, two) && file_is_binary(two)))
abbrev = 40;
}
len += snprintf(msg + len, sizeof(msg) - len,
*/
read_cache();
}
- if (options->setup & DIFF_SETUP_USE_SIZE_CACHE)
- use_size_cache = 1;
if (options->abbrev <= 0 || 40 < options->abbrev)
options->abbrev = 40; /* full */
printf("%s ",
diff_unique_abbrev(p->two->sha1, abbrev));
}
- printf("%s%c%s", status, inter_name_termination, path_one);
+ printf("%s%c%s", status, inter_name_termination,
+ two_paths || p->one->mode ? path_one : path_two);
if (two_paths)
printf("%c%s", inter_name_termination, path_two);
putchar(line_termination);
@@ -2701,7 +2773,7 @@ static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1)
return error("unable to read files to diff");
/* Maybe hash p->two? into the patch id? */
- if (mmfile_is_binary(&mf2))
+ if (file_is_binary(p->two))
continue;
len1 = remove_space(p->one->path, strlen(p->one->path));