Code

standardize and improve lookup rules for external local repos
[git.git] / builtin / clone.c
index 19ed64041d0575ee1ad49071dfe1e671114b8ae3..b11dd6dd611b60a85d0a7c8d16a078c16630fa50 100644 (file)
@@ -8,7 +8,7 @@
  * Clone a repository into a different directory that does not yet exist.
  */
 
-#include "cache.h"
+#include "builtin.h"
 #include "parse-options.h"
 #include "fetch-pack.h"
 #include "refs.h"
@@ -39,12 +39,24 @@ static const char * const builtin_clone_usage[] = {
 
 static int option_no_checkout, option_bare, option_mirror;
 static int option_local, option_no_hardlinks, option_shared, option_recursive;
-static char *option_template, *option_reference, *option_depth;
+static char *option_template, *option_depth;
 static char *option_origin = NULL;
 static char *option_branch = NULL;
+static const char *real_git_dir;
 static char *option_upload_pack = "git-upload-pack";
 static int option_verbosity;
 static int option_progress;
+static struct string_list option_config;
+static struct string_list option_reference;
+
+static int opt_parse_reference(const struct option *opt, const char *arg, int unset)
+{
+       struct string_list *option_reference = opt->value;
+       if (!arg)
+               return -1;
+       string_list_append(option_reference, arg);
+       return 0;
+}
 
 static struct option builtin_clone_options[] = {
        OPT__VERBOSITY(&option_verbosity),
@@ -66,10 +78,12 @@ static struct option builtin_clone_options[] = {
                    "setup as shared repository"),
        OPT_BOOLEAN(0, "recursive", &option_recursive,
                    "initialize submodules in the clone"),
-       OPT_STRING(0, "template", &option_template, "path",
-                  "path the template repository"),
-       OPT_STRING(0, "reference", &option_reference, "repo",
-                  "reference repository"),
+       OPT_BOOLEAN(0, "recurse-submodules", &option_recursive,
+                   "initialize submodules in the clone"),
+       OPT_STRING(0, "template", &option_template, "template-directory",
+                  "directory from which templates will be used"),
+       OPT_CALLBACK(0 , "reference", &option_reference, "repo",
+                    "reference repository", &opt_parse_reference),
        OPT_STRING('o', "origin", &option_origin, "branch",
                   "use <branch> instead of 'origin' to track upstream"),
        OPT_STRING('b', "branch", &option_branch, "branch",
@@ -78,7 +92,10 @@ static struct option builtin_clone_options[] = {
                   "path to git-upload-pack on the remote"),
        OPT_STRING(0, "depth", &option_depth, "depth",
                    "create a shallow clone of that depth"),
-
+       OPT_STRING(0, "separate-git-dir", &real_git_dir, "gitdir",
+                  "separate git dir from working tree"),
+       OPT_STRING_LIST('c', "config", &option_config, "key=value",
+                       "set config inside the new repository"),
        OPT_END()
 };
 
@@ -88,7 +105,7 @@ static const char *argv_submodule[] = {
 
 static char *get_repo_path(const char *repo, int *is_bundle)
 {
-       static char *suffix[] = { "/.git", ".git", "" };
+       static char *suffix[] = { "/.git", "", ".git/.git", ".git" };
        static char *bundle_suffix[] = { ".bundle", "" };
        struct stat st;
        int i;
@@ -96,9 +113,26 @@ static char *get_repo_path(const char *repo, int *is_bundle)
        for (i = 0; i < ARRAY_SIZE(suffix); i++) {
                const char *path;
                path = mkpath("%s%s", repo, suffix[i]);
-               if (is_directory(path)) {
+               if (stat(path, &st))
+                       continue;
+               if (S_ISDIR(st.st_mode) && is_git_directory(path)) {
                        *is_bundle = 0;
-                       return xstrdup(make_nonrelative_path(path));
+                       return xstrdup(absolute_path(path));
+               } else if (S_ISREG(st.st_mode) && st.st_size > 8) {
+                       /* Is it a "gitfile"? */
+                       char signature[8];
+                       int len, fd = open(path, O_RDONLY);
+                       if (fd < 0)
+                               continue;
+                       len = read_in_full(fd, signature, 8);
+                       close(fd);
+                       if (len != 8 || strncmp(signature, "gitdir: ", 8))
+                               continue;
+                       path = read_gitfile(path);
+                       if (path) {
+                               *is_bundle = 0;
+                               return xstrdup(absolute_path(path));
+                       }
                }
        }
 
@@ -107,7 +141,7 @@ static char *get_repo_path(const char *repo, int *is_bundle)
                path = mkpath("%s%s", repo, bundle_suffix[i]);
                if (!stat(path, &st) && S_ISREG(st.st_mode)) {
                        *is_bundle = 1;
-                       return xstrdup(make_nonrelative_path(path));
+                       return xstrdup(absolute_path(path));
                }
        }
 
@@ -192,39 +226,80 @@ static void strip_trailing_slashes(char *dir)
        *end = '\0';
 }
 
-static void setup_reference(const char *repo)
+static int add_one_reference(struct string_list_item *item, void *cb_data)
 {
-       const char *ref_git;
-       char *ref_git_copy;
-
+       char *ref_git;
+       struct strbuf alternate = STRBUF_INIT;
        struct remote *remote;
        struct transport *transport;
        const struct ref *extra;
 
-       ref_git = make_absolute_path(option_reference);
-
-       if (is_directory(mkpath("%s/.git/objects", ref_git)))
-               ref_git = mkpath("%s/.git", ref_git);
-       else if (!is_directory(mkpath("%s/objects", ref_git)))
-               die("reference repository '%s' is not a local directory.",
-                   option_reference);
-
-       ref_git_copy = xstrdup(ref_git);
-
-       add_to_alternates_file(ref_git_copy);
-
-       remote = remote_get(ref_git_copy);
-       transport = transport_get(remote, ref_git_copy);
+       /* Beware: real_path() and mkpath() return static buffer */
+       ref_git = xstrdup(real_path(item->string));
+       if (is_directory(mkpath("%s/.git/objects", ref_git))) {
+               char *ref_git_git = xstrdup(mkpath("%s/.git", ref_git));
+               free(ref_git);
+               ref_git = ref_git_git;
+       } else if (!is_directory(mkpath("%s/objects", ref_git)))
+               die(_("reference repository '%s' is not a local directory."),
+                   item->string);
+
+       strbuf_addf(&alternate, "%s/objects", ref_git);
+       add_to_alternates_file(alternate.buf);
+       strbuf_release(&alternate);
+
+       remote = remote_get(ref_git);
+       transport = transport_get(remote, ref_git);
        for (extra = transport_get_remote_refs(transport); extra;
             extra = extra->next)
                add_extra_ref(extra->name, extra->old_sha1, 0);
 
        transport_disconnect(transport);
+       free(ref_git);
+       return 0;
+}
+
+static void setup_reference(void)
+{
+       for_each_string_list(&option_reference, add_one_reference, NULL);
+}
 
-       free(ref_git_copy);
+static void copy_alternates(struct strbuf *src, struct strbuf *dst,
+                           const char *src_repo)
+{
+       /*
+        * Read from the source objects/info/alternates file
+        * and copy the entries to corresponding file in the
+        * destination repository with add_to_alternates_file().
+        * Both src and dst have "$path/objects/info/alternates".
+        *
+        * Instead of copying bit-for-bit from the original,
+        * we need to append to existing one so that the already
+        * created entry via "clone -s" is not lost, and also
+        * to turn entries with paths relative to the original
+        * absolute, so that they can be used in the new repository.
+        */
+       FILE *in = fopen(src->buf, "r");
+       struct strbuf line = STRBUF_INIT;
+
+       while (strbuf_getline(&line, in, '\n') != EOF) {
+               char *abs_path, abs_buf[PATH_MAX];
+               if (!line.len || line.buf[0] == '#')
+                       continue;
+               if (is_absolute_path(line.buf)) {
+                       add_to_alternates_file(line.buf);
+                       continue;
+               }
+               abs_path = mkpath("%s/objects/%s", src_repo, line.buf);
+               normalize_path_copy(abs_buf, abs_path);
+               add_to_alternates_file(abs_buf);
+       }
+       strbuf_release(&line);
+       fclose(in);
 }
 
-static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest)
+static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest,
+                                  const char *src_repo, int src_baselen)
 {
        struct dirent *de;
        struct stat buf;
@@ -233,15 +308,15 @@ static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest)
 
        dir = opendir(src->buf);
        if (!dir)
-               die_errno("failed to open '%s'", src->buf);
+               die_errno(_("failed to open '%s'"), src->buf);
 
        if (mkdir(dest->buf, 0777)) {
                if (errno != EEXIST)
-                       die_errno("failed to create directory '%s'", dest->buf);
+                       die_errno(_("failed to create directory '%s'"), dest->buf);
                else if (stat(dest->buf, &buf))
-                       die_errno("failed to stat '%s'", dest->buf);
+                       die_errno(_("failed to stat '%s'"), dest->buf);
                else if (!S_ISDIR(buf.st_mode))
-                       die("%s exists and is not a directory", dest->buf);
+                       die(_("%s exists and is not a directory"), dest->buf);
        }
 
        strbuf_addch(src, '/');
@@ -255,26 +330,33 @@ static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest)
                strbuf_setlen(dest, dest_len);
                strbuf_addstr(dest, de->d_name);
                if (stat(src->buf, &buf)) {
-                       warning ("failed to stat %s\n", src->buf);
+                       warning (_("failed to stat %s\n"), src->buf);
                        continue;
                }
                if (S_ISDIR(buf.st_mode)) {
                        if (de->d_name[0] != '.')
-                               copy_or_link_directory(src, dest);
+                               copy_or_link_directory(src, dest,
+                                                      src_repo, src_baselen);
+                       continue;
+               }
+
+               /* Files that cannot be copied bit-for-bit... */
+               if (!strcmp(src->buf + src_baselen, "/info/alternates")) {
+                       copy_alternates(src, dest, src_repo);
                        continue;
                }
 
                if (unlink(dest->buf) && errno != ENOENT)
-                       die_errno("failed to unlink '%s'", dest->buf);
+                       die_errno(_("failed to unlink '%s'"), dest->buf);
                if (!option_no_hardlinks) {
                        if (!link(src->buf, dest->buf))
                                continue;
                        if (option_local)
-                               die_errno("failed to create link '%s'", dest->buf);
+                               die_errno(_("failed to create link '%s'"), dest->buf);
                        option_no_hardlinks = 1;
                }
                if (copy_file_with_time(dest->buf, src->buf, 0666))
-                       die_errno("failed to copy file to '%s'", dest->buf);
+                       die_errno(_("failed to copy file to '%s'"), dest->buf);
        }
        closedir(dir);
 }
@@ -283,17 +365,20 @@ static const struct ref *clone_local(const char *src_repo,
                                     const char *dest_repo)
 {
        const struct ref *ret;
-       struct strbuf src = STRBUF_INIT;
-       struct strbuf dest = STRBUF_INIT;
        struct remote *remote;
        struct transport *transport;
 
-       if (option_shared)
-               add_to_alternates_file(src_repo);
-       else {
+       if (option_shared) {
+               struct strbuf alt = STRBUF_INIT;
+               strbuf_addf(&alt, "%s/objects", src_repo);
+               add_to_alternates_file(alt.buf);
+               strbuf_release(&alt);
+       } else {
+               struct strbuf src = STRBUF_INIT;
+               struct strbuf dest = STRBUF_INIT;
                strbuf_addf(&src, "%s/objects", src_repo);
                strbuf_addf(&dest, "%s/objects", dest_repo);
-               copy_or_link_directory(&src, &dest);
+               copy_or_link_directory(&src, &dest, src_repo, src.len);
                strbuf_release(&src);
                strbuf_release(&dest);
        }
@@ -303,7 +388,7 @@ static const struct ref *clone_local(const char *src_repo,
        ret = transport_get_remote_refs(transport);
        transport_disconnect(transport);
        if (0 <= option_verbosity)
-               printf("done.\n");
+               printf(_("done.\n"));
        return ret;
 }
 
@@ -338,8 +423,9 @@ static void remove_junk_on_signal(int signo)
 static struct ref *wanted_peer_refs(const struct ref *refs,
                struct refspec *refspec)
 {
-       struct ref *local_refs = NULL;
-       struct ref **tail = &local_refs;
+       struct ref *head = copy_ref(find_ref_by_name(refs, "HEAD"));
+       struct ref *local_refs = head;
+       struct ref **tail = head ? &head->next : &local_refs;
 
        get_fetch_map(refs, refspec, &tail, 0);
        if (!option_mirror)
@@ -352,13 +438,32 @@ static void write_remote_refs(const struct ref *local_refs)
 {
        const struct ref *r;
 
-       for (r = local_refs; r; r = r->next)
+       for (r = local_refs; r; r = r->next) {
+               if (!r->peer_ref)
+                       continue;
                add_extra_ref(r->peer_ref->name, r->old_sha1, 0);
+       }
 
        pack_refs(PACK_REFS_ALL);
        clear_extra_refs();
 }
 
+static int write_one_config(const char *key, const char *value, void *data)
+{
+       return git_config_set_multivar(key, value ? value : "true", "^$", 0);
+}
+
+static void write_config(struct string_list *config)
+{
+       int i;
+
+       for (i = 0; i < config->nr; i++) {
+               if (git_config_parse_parameter(config->items[i].string,
+                                              write_one_config, NULL) < 0)
+                       die("unable to write parameters to config file");
+       }
+}
+
 int cmd_clone(int argc, const char **argv, const char *prefix)
 {
        int is_bundle = 0, is_local;
@@ -381,15 +486,16 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 
        junk_pid = getpid();
 
+       packet_trace_identity("clone");
        argc = parse_options(argc, argv, prefix, builtin_clone_options,
                             builtin_clone_usage, 0);
 
        if (argc > 2)
-               usage_msg_opt("Too many arguments.",
+               usage_msg_opt(_("Too many arguments."),
                        builtin_clone_usage, builtin_clone_options);
 
        if (argc == 0)
-               usage_msg_opt("You must specify a repository to clone.",
+               usage_msg_opt(_("You must specify a repository to clone."),
                        builtin_clone_usage, builtin_clone_options);
 
        if (option_mirror)
@@ -397,7 +503,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 
        if (option_bare) {
                if (option_origin)
-                       die("--bare and --origin %s options are incompatible.",
+                       die(_("--bare and --origin %s options are incompatible."),
                            option_origin);
                option_no_checkout = 1;
        }
@@ -409,14 +515,14 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 
        path = get_repo_path(repo_name, &is_bundle);
        if (path)
-               repo = xstrdup(make_nonrelative_path(repo_name));
+               repo = xstrdup(absolute_path(repo_name));
        else if (!strchr(repo_name, ':'))
-               repo = xstrdup(make_absolute_path(repo_name));
+               die(_("repository '%s' does not exist"), repo_name);
        else
                repo = repo_name;
        is_local = path && !is_bundle;
        if (is_local && option_depth)
-               warning("--depth is ignored in local clones; use file:// instead.");
+               warning(_("--depth is ignored in local clones; use file:// instead."));
 
        if (argc == 2)
                dir = xstrdup(argv[1]);
@@ -426,8 +532,8 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 
        dest_exists = !stat(dir, &buf);
        if (dest_exists && !is_empty_dir(dir))
-               die("destination path '%s' already exists and is not "
-                       "an empty directory.", dir);
+               die(_("destination path '%s' already exists and is not "
+                       "an empty directory."), dir);
 
        strbuf_addf(&reflog_msg, "clone: from %s", repo);
 
@@ -436,7 +542,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
        else {
                work_tree = getenv("GIT_WORK_TREE");
                if (work_tree && !stat(work_tree, &buf))
-                       die("working tree '%s' already exists.", work_tree);
+                       die(_("working tree '%s' already exists."), work_tree);
        }
 
        if (option_bare || work_tree)
@@ -449,10 +555,10 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
        if (!option_bare) {
                junk_work_tree = work_tree;
                if (safe_create_leading_directories_const(work_tree) < 0)
-                       die_errno("could not create leading directories of '%s'",
+                       die_errno(_("could not create leading directories of '%s'"),
                                  work_tree);
                if (!dest_exists && mkdir(work_tree, 0755))
-                       die_errno("could not create work tree dir '%s'.",
+                       die_errno(_("could not create work tree dir '%s'."),
                                  work_tree);
                set_git_work_tree(work_tree);
        }
@@ -463,13 +569,20 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
        setenv(CONFIG_ENVIRONMENT, mkpath("%s/config", git_dir), 1);
 
        if (safe_create_leading_directories_const(git_dir) < 0)
-               die("could not create leading directories of '%s'", git_dir);
-       set_git_dir(make_absolute_path(git_dir));
+               die(_("could not create leading directories of '%s'"), git_dir);
 
-       if (0 <= option_verbosity)
-               printf("Cloning into %s%s...\n",
-                      option_bare ? "bare repository " : "", dir);
+       set_git_dir_init(git_dir, real_git_dir, 0);
+       if (real_git_dir)
+               git_dir = real_git_dir;
+
+       if (0 <= option_verbosity) {
+               if (option_bare)
+                       printf(_("Cloning into bare repository '%s'...\n"), dir);
+               else
+                       printf(_("Cloning into '%s'...\n"), dir);
+       }
        init_db(option_template, INIT_DB_QUIET);
+       write_config(&option_config);
 
        /*
         * At this point, the config exists, so we do not need the
@@ -509,8 +622,8 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
        git_config_set(key.buf, repo);
        strbuf_reset(&key);
 
-       if (option_reference)
-               setup_reference(git_dir);
+       if (option_reference.nr)
+               setup_reference();
 
        fetch_pattern = value.buf;
        refspec = parse_fetch_refspec(1, &fetch_pattern);
@@ -525,7 +638,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
                transport = transport_get(remote, remote->url[0]);
 
                if (!transport->get_refs_list || !transport->fetch)
-                       die("Don't know how to clone %s", transport->url);
+                       die(_("Don't know how to clone %s"), transport->url);
 
                transport_set_option(transport, TRANS_OPT_KEEP, "yes");
 
@@ -564,8 +677,8 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
                        strbuf_release(&head);
 
                        if (!our_head_points_at) {
-                               warning("Remote branch %s not found in "
-                                       "upstream %s, using HEAD instead",
+                               warning(_("Remote branch %s not found in "
+                                       "upstream %s, using HEAD instead"),
                                        option_branch, option_origin);
                                our_head_points_at = remote_head_points_at;
                        }
@@ -574,7 +687,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
                        our_head_points_at = remote_head_points_at;
        }
        else {
-               warning("You appear to have cloned an empty repository.");
+               warning(_("You appear to have cloned an empty repository."));
                our_head_points_at = NULL;
                remote_head_points_at = NULL;
                remote_head = NULL;
@@ -616,8 +729,8 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
        } else {
                /* Nothing to checkout out */
                if (!option_no_checkout)
-                       warning("remote HEAD refers to nonexistent ref, "
-                               "unable to checkout.\n");
+                       warning(_("remote HEAD refers to nonexistent ref, "
+                               "unable to checkout.\n"));
                option_no_checkout = 1;
        }
 
@@ -653,7 +766,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 
                if (write_cache(fd, active_cache, active_nr) ||
                    commit_locked_index(lock_file))
-                       die("unable to write new index file");
+                       die(_("unable to write new index file"));
 
                err |= run_hook(NULL, "post-checkout", sha1_to_hex(null_sha1),
                                sha1_to_hex(our_head_points_at->old_sha1), "1",