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572 lines
14 KiB
572 lines
14 KiB
/* |
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* Builtin "git clone" |
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* |
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* Copyright (c) 2007 Kristian Høgsberg <krh@redhat.com>, |
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* 2008 Daniel Barkalow <barkalow@iabervon.org> |
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* Based on git-commit.sh by Junio C Hamano and Linus Torvalds |
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* |
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* Clone a repository into a different directory that does not yet exist. |
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*/ |
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|
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#include "cache.h" |
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#include "parse-options.h" |
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#include "fetch-pack.h" |
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#include "refs.h" |
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#include "tree.h" |
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#include "tree-walk.h" |
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#include "unpack-trees.h" |
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#include "transport.h" |
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#include "strbuf.h" |
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#include "dir.h" |
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#include "pack-refs.h" |
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|
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/* |
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* Overall FIXMEs: |
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* - respect DB_ENVIRONMENT for .git/objects. |
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* |
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* Implementation notes: |
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* - dropping use-separate-remote and no-separate-remote compatibility |
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* |
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*/ |
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static const char * const builtin_clone_usage[] = { |
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"git-clone [options] [--] <repo> [<dir>]", |
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NULL |
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}; |
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|
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static int option_quiet, option_no_checkout, option_bare; |
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static int option_local, option_no_hardlinks, option_shared; |
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static char *option_template, *option_reference, *option_depth; |
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static char *option_origin = NULL; |
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static char *option_upload_pack = "git-upload-pack"; |
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|
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static struct option builtin_clone_options[] = { |
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OPT__QUIET(&option_quiet), |
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OPT_BOOLEAN('n', "no-checkout", &option_no_checkout, |
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"don't create a checkout"), |
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OPT_BOOLEAN(0, "bare", &option_bare, "create a bare repository"), |
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OPT_BOOLEAN(0, "naked", &option_bare, "create a bare repository"), |
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OPT_BOOLEAN('l', "local", &option_local, |
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"to clone from a local repository"), |
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OPT_BOOLEAN(0, "no-hardlinks", &option_no_hardlinks, |
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"don't use local hardlinks, always copy"), |
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OPT_BOOLEAN('s', "shared", &option_shared, |
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"setup as shared repository"), |
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OPT_STRING(0, "template", &option_template, "path", |
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"path the template repository"), |
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OPT_STRING(0, "reference", &option_reference, "repo", |
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"reference repository"), |
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OPT_STRING('o', "origin", &option_origin, "branch", |
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"use <branch> instead or 'origin' to track upstream"), |
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OPT_STRING('u', "upload-pack", &option_upload_pack, "path", |
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"path to git-upload-pack on the remote"), |
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OPT_STRING(0, "depth", &option_depth, "depth", |
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"create a shallow clone of that depth"), |
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OPT_END() |
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}; |
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static char *get_repo_path(const char *repo, int *is_bundle) |
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{ |
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static char *suffix[] = { "/.git", ".git", "" }; |
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static char *bundle_suffix[] = { ".bundle", "" }; |
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struct stat st; |
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int i; |
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for (i = 0; i < ARRAY_SIZE(suffix); i++) { |
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const char *path; |
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path = mkpath("%s%s", repo, suffix[i]); |
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if (!stat(path, &st) && S_ISDIR(st.st_mode)) { |
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*is_bundle = 0; |
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return xstrdup(make_nonrelative_path(path)); |
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} |
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} |
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for (i = 0; i < ARRAY_SIZE(bundle_suffix); i++) { |
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const char *path; |
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path = mkpath("%s%s", repo, bundle_suffix[i]); |
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if (!stat(path, &st) && S_ISREG(st.st_mode)) { |
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*is_bundle = 1; |
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return xstrdup(make_nonrelative_path(path)); |
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} |
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} |
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return NULL; |
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} |
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static char *guess_dir_name(const char *repo, int is_bundle) |
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{ |
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const char *p, *start, *end, *limit; |
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int after_slash_or_colon; |
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|
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/* Guess dir name from repository: strip trailing '/', |
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* strip trailing '[:/]*.{git,bundle}', strip leading '.*[/:]'. */ |
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after_slash_or_colon = 1; |
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limit = repo + strlen(repo); |
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start = repo; |
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end = limit; |
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for (p = repo; p < limit; p++) { |
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const char *prefix = is_bundle ? ".bundle" : ".git"; |
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if (!prefixcmp(p, prefix)) { |
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if (!after_slash_or_colon) |
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end = p; |
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p += strlen(prefix) - 1; |
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} else if (!prefixcmp(p, ".bundle")) { |
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if (!after_slash_or_colon) |
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end = p; |
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p += 7; |
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} else if (*p == '/' || *p == ':') { |
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if (end == limit) |
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end = p; |
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after_slash_or_colon = 1; |
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} else if (after_slash_or_colon) { |
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start = p; |
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end = limit; |
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after_slash_or_colon = 0; |
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} |
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} |
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return xstrndup(start, end - start); |
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} |
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static int is_directory(const char *path) |
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{ |
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struct stat buf; |
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return !stat(path, &buf) && S_ISDIR(buf.st_mode); |
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} |
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static void setup_reference(const char *repo) |
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{ |
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const char *ref_git; |
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char *ref_git_copy; |
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struct remote *remote; |
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struct transport *transport; |
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const struct ref *extra; |
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ref_git = make_absolute_path(option_reference); |
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if (is_directory(mkpath("%s/.git/objects", ref_git))) |
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ref_git = mkpath("%s/.git", ref_git); |
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else if (!is_directory(mkpath("%s/objects", ref_git))) |
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die("reference repository '%s' is not a local directory.", |
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option_reference); |
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ref_git_copy = xstrdup(ref_git); |
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add_to_alternates_file(ref_git_copy); |
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remote = remote_get(ref_git_copy); |
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transport = transport_get(remote, ref_git_copy); |
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for (extra = transport_get_remote_refs(transport); extra; |
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extra = extra->next) |
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add_extra_ref(extra->name, extra->old_sha1, 0); |
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transport_disconnect(transport); |
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free(ref_git_copy); |
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} |
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static void copy_or_link_directory(char *src, char *dest) |
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{ |
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struct dirent *de; |
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struct stat buf; |
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int src_len, dest_len; |
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DIR *dir; |
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dir = opendir(src); |
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if (!dir) |
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die("failed to open %s\n", src); |
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if (mkdir(dest, 0777)) { |
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if (errno != EEXIST) |
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die("failed to create directory %s\n", dest); |
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else if (stat(dest, &buf)) |
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die("failed to stat %s\n", dest); |
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else if (!S_ISDIR(buf.st_mode)) |
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die("%s exists and is not a directory\n", dest); |
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} |
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src_len = strlen(src); |
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src[src_len] = '/'; |
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dest_len = strlen(dest); |
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dest[dest_len] = '/'; |
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while ((de = readdir(dir)) != NULL) { |
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strcpy(src + src_len + 1, de->d_name); |
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strcpy(dest + dest_len + 1, de->d_name); |
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if (stat(src, &buf)) { |
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warning ("failed to stat %s\n", src); |
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continue; |
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} |
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if (S_ISDIR(buf.st_mode)) { |
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if (de->d_name[0] != '.') |
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copy_or_link_directory(src, dest); |
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continue; |
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} |
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if (unlink(dest) && errno != ENOENT) |
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die("failed to unlink %s\n", dest); |
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if (!option_no_hardlinks) { |
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if (!link(src, dest)) |
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continue; |
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if (option_local) |
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die("failed to create link %s\n", dest); |
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option_no_hardlinks = 1; |
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} |
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if (copy_file(dest, src, 0666)) |
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die("failed to copy file to %s\n", dest); |
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} |
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closedir(dir); |
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} |
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static const struct ref *clone_local(const char *src_repo, |
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const char *dest_repo) |
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{ |
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const struct ref *ret; |
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char src[PATH_MAX]; |
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char dest[PATH_MAX]; |
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struct remote *remote; |
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struct transport *transport; |
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if (option_shared) |
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add_to_alternates_file(src_repo); |
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else { |
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snprintf(src, PATH_MAX, "%s/objects", src_repo); |
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snprintf(dest, PATH_MAX, "%s/objects", dest_repo); |
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copy_or_link_directory(src, dest); |
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} |
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remote = remote_get(src_repo); |
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transport = transport_get(remote, src_repo); |
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ret = transport_get_remote_refs(transport); |
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transport_disconnect(transport); |
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return ret; |
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} |
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static const char *junk_work_tree; |
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static const char *junk_git_dir; |
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pid_t junk_pid; |
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static void remove_junk(void) |
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{ |
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struct strbuf sb; |
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if (getpid() != junk_pid) |
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return; |
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strbuf_init(&sb, 0); |
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if (junk_git_dir) { |
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strbuf_addstr(&sb, junk_git_dir); |
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remove_dir_recursively(&sb, 0); |
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strbuf_reset(&sb); |
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} |
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if (junk_work_tree) { |
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strbuf_addstr(&sb, junk_work_tree); |
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remove_dir_recursively(&sb, 0); |
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strbuf_reset(&sb); |
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} |
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} |
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static void remove_junk_on_signal(int signo) |
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{ |
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remove_junk(); |
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signal(SIGINT, SIG_DFL); |
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raise(signo); |
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} |
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static const struct ref *locate_head(const struct ref *refs, |
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const struct ref *mapped_refs, |
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const struct ref **remote_head_p) |
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{ |
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const struct ref *remote_head = NULL; |
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const struct ref *remote_master = NULL; |
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const struct ref *r; |
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for (r = refs; r; r = r->next) |
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if (!strcmp(r->name, "HEAD")) |
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remote_head = r; |
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for (r = mapped_refs; r; r = r->next) |
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if (!strcmp(r->name, "refs/heads/master")) |
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remote_master = r; |
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if (remote_head_p) |
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*remote_head_p = remote_head; |
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/* If there's no HEAD value at all, never mind. */ |
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if (!remote_head) |
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return NULL; |
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/* If refs/heads/master could be right, it is. */ |
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if (remote_master && !hashcmp(remote_master->old_sha1, |
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remote_head->old_sha1)) |
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return remote_master; |
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/* Look for another ref that points there */ |
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for (r = mapped_refs; r; r = r->next) |
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if (r != remote_head && |
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!hashcmp(r->old_sha1, remote_head->old_sha1)) |
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return r; |
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/* Nothing is the same */ |
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return NULL; |
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} |
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static struct ref *write_remote_refs(const struct ref *refs, |
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struct refspec *refspec, const char *reflog) |
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{ |
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struct ref *local_refs = NULL; |
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struct ref **tail = &local_refs; |
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struct ref *r; |
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get_fetch_map(refs, refspec, &tail, 0); |
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get_fetch_map(refs, tag_refspec, &tail, 0); |
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for (r = local_refs; r; r = r->next) |
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add_extra_ref(r->peer_ref->name, r->old_sha1, 0); |
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pack_refs(PACK_REFS_ALL); |
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clear_extra_refs(); |
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return local_refs; |
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} |
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int cmd_clone(int argc, const char **argv, const char *prefix) |
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{ |
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int use_local_hardlinks = 1; |
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int use_separate_remote = 1; |
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int is_bundle = 0; |
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struct stat buf; |
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const char *repo_name, *repo, *work_tree, *git_dir; |
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char *path, *dir; |
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const struct ref *refs, *head_points_at, *remote_head, *mapped_refs; |
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char branch_top[256], key[256], value[256]; |
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struct strbuf reflog_msg; |
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struct transport *transport = NULL; |
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struct refspec refspec; |
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junk_pid = getpid(); |
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argc = parse_options(argc, argv, builtin_clone_options, |
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builtin_clone_usage, 0); |
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if (argc == 0) |
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die("You must specify a repository to clone."); |
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if (option_no_hardlinks) |
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use_local_hardlinks = 0; |
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if (option_bare) { |
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if (option_origin) |
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die("--bare and --origin %s options are incompatible.", |
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option_origin); |
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option_no_checkout = 1; |
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use_separate_remote = 0; |
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} |
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if (!option_origin) |
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option_origin = "origin"; |
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repo_name = argv[0]; |
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path = get_repo_path(repo_name, &is_bundle); |
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if (path) |
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repo = path; |
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else if (!strchr(repo_name, ':')) |
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repo = xstrdup(make_absolute_path(repo_name)); |
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else |
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repo = repo_name; |
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if (argc == 2) |
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dir = xstrdup(argv[1]); |
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else |
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dir = guess_dir_name(repo_name, is_bundle); |
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if (!stat(dir, &buf)) |
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die("destination directory '%s' already exists.", dir); |
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strbuf_init(&reflog_msg, 0); |
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strbuf_addf(&reflog_msg, "clone: from %s", repo); |
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if (option_bare) |
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work_tree = NULL; |
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else { |
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work_tree = getenv("GIT_WORK_TREE"); |
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if (work_tree && !stat(work_tree, &buf)) |
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die("working tree '%s' already exists.", work_tree); |
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} |
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if (option_bare || work_tree) |
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git_dir = xstrdup(dir); |
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else { |
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work_tree = dir; |
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git_dir = xstrdup(mkpath("%s/.git", dir)); |
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} |
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if (!option_bare) { |
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junk_work_tree = work_tree; |
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if (safe_create_leading_directories_const(work_tree) < 0) |
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die("could not create leading directories of '%s'", |
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work_tree); |
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if (mkdir(work_tree, 0755)) |
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die("could not create work tree dir '%s'.", work_tree); |
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set_git_work_tree(work_tree); |
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} |
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junk_git_dir = git_dir; |
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atexit(remove_junk); |
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signal(SIGINT, remove_junk_on_signal); |
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setenv(CONFIG_ENVIRONMENT, xstrdup(mkpath("%s/config", git_dir)), 1); |
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if (safe_create_leading_directories_const(git_dir) < 0) |
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die("could not create leading directories of '%s'", git_dir); |
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set_git_dir(make_absolute_path(git_dir)); |
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init_db(option_template, option_quiet ? INIT_DB_QUIET : 0); |
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/* |
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* At this point, the config exists, so we do not need the |
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* environment variable. We actually need to unset it, too, to |
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* re-enable parsing of the global configs. |
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*/ |
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unsetenv(CONFIG_ENVIRONMENT); |
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if (option_reference) |
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setup_reference(git_dir); |
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git_config(git_default_config, NULL); |
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if (option_bare) { |
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strcpy(branch_top, "refs/heads/"); |
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git_config_set("core.bare", "true"); |
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} else { |
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snprintf(branch_top, sizeof(branch_top), |
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"refs/remotes/%s/", option_origin); |
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/* Configure the remote */ |
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snprintf(key, sizeof(key), "remote.%s.url", option_origin); |
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git_config_set(key, repo); |
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snprintf(key, sizeof(key), "remote.%s.fetch", option_origin); |
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snprintf(value, sizeof(value), |
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"+refs/heads/*:%s*", branch_top); |
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git_config_set_multivar(key, value, "^$", 0); |
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} |
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refspec.force = 0; |
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refspec.pattern = 1; |
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refspec.src = "refs/heads/"; |
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refspec.dst = branch_top; |
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if (path && !is_bundle) |
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refs = clone_local(path, git_dir); |
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else { |
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struct remote *remote = remote_get(argv[0]); |
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transport = transport_get(remote, remote->url[0]); |
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if (!transport->get_refs_list || !transport->fetch) |
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die("Don't know how to clone %s", transport->url); |
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transport_set_option(transport, TRANS_OPT_KEEP, "yes"); |
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if (option_depth) |
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transport_set_option(transport, TRANS_OPT_DEPTH, |
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option_depth); |
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if (option_quiet) |
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transport->verbose = -1; |
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refs = transport_get_remote_refs(transport); |
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transport_fetch_refs(transport, refs); |
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} |
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clear_extra_refs(); |
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mapped_refs = write_remote_refs(refs, &refspec, reflog_msg.buf); |
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head_points_at = locate_head(refs, mapped_refs, &remote_head); |
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if (head_points_at) { |
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/* Local default branch link */ |
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create_symref("HEAD", head_points_at->name, NULL); |
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if (!option_bare) { |
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struct strbuf head_ref; |
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const char *head = head_points_at->name; |
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if (!prefixcmp(head, "refs/heads/")) |
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head += 11; |
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/* Set up the initial local branch */ |
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/* Local branch initial value */ |
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update_ref(reflog_msg.buf, "HEAD", |
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head_points_at->old_sha1, |
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NULL, 0, DIE_ON_ERR); |
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strbuf_init(&head_ref, 0); |
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strbuf_addstr(&head_ref, branch_top); |
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strbuf_addstr(&head_ref, "HEAD"); |
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/* Remote branch link */ |
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create_symref(head_ref.buf, |
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head_points_at->peer_ref->name, |
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reflog_msg.buf); |
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snprintf(key, sizeof(key), "branch.%s.remote", head); |
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git_config_set(key, option_origin); |
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snprintf(key, sizeof(key), "branch.%s.merge", head); |
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git_config_set(key, head_points_at->name); |
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} |
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} else if (remote_head) { |
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/* Source had detached HEAD pointing somewhere. */ |
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if (!option_bare) |
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update_ref(reflog_msg.buf, "HEAD", |
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remote_head->old_sha1, |
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NULL, REF_NODEREF, DIE_ON_ERR); |
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} else { |
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/* Nothing to checkout out */ |
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if (!option_no_checkout) |
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warning("remote HEAD refers to nonexistent ref, " |
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"unable to checkout.\n"); |
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option_no_checkout = 1; |
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} |
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if (transport) |
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transport_unlock_pack(transport); |
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|
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if (!option_no_checkout) { |
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struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file)); |
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struct unpack_trees_options opts; |
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struct tree *tree; |
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struct tree_desc t; |
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int fd; |
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|
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/* We need to be in the new work tree for the checkout */ |
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setup_work_tree(); |
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fd = hold_locked_index(lock_file, 1); |
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memset(&opts, 0, sizeof opts); |
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opts.update = 1; |
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opts.merge = 1; |
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opts.fn = oneway_merge; |
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opts.verbose_update = !option_quiet; |
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opts.src_index = &the_index; |
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opts.dst_index = &the_index; |
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tree = parse_tree_indirect(remote_head->old_sha1); |
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parse_tree(tree); |
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init_tree_desc(&t, tree->buffer, tree->size); |
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unpack_trees(1, &t, &opts); |
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|
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if (write_cache(fd, active_cache, active_nr) || |
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commit_locked_index(lock_file)) |
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die("unable to write new index file"); |
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} |
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strbuf_release(&reflog_msg); |
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junk_pid = 0; |
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return 0; |
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}
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