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669 lines
17 KiB
669 lines
17 KiB
/* |
|
* 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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#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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#include "sigchain.h" |
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#include "branch.h" |
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#include "remote.h" |
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#include "run-command.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_no_checkout, option_bare, option_mirror; |
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static int option_local, option_no_hardlinks, option_shared, option_recursive; |
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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_branch = NULL; |
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static char *option_upload_pack = "git-upload-pack"; |
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static int option_verbosity; |
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static int option_progress; |
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|
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static struct option builtin_clone_options[] = { |
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OPT__VERBOSITY(&option_verbosity), |
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OPT_BOOLEAN(0, "progress", &option_progress, |
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"force progress reporting"), |
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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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{ OPTION_BOOLEAN, 0, "naked", &option_bare, NULL, |
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"create a bare repository", |
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PARSE_OPT_NOARG | PARSE_OPT_HIDDEN }, |
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OPT_BOOLEAN(0, "mirror", &option_mirror, |
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"create a mirror repository (implies bare)"), |
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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_BOOLEAN(0, "recursive", &option_recursive, |
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"initialize submodules in the clone"), |
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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 of 'origin' to track upstream"), |
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OPT_STRING('b', "branch", &option_branch, "branch", |
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"checkout <branch> instead of the remote's HEAD"), |
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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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|
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OPT_END() |
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}; |
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|
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static const char *argv_submodule[] = { |
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"submodule", "update", "--init", "--recursive", NULL |
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}; |
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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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|
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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 (is_directory(path)) { |
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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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|
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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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|
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return NULL; |
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} |
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|
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static char *guess_dir_name(const char *repo, int is_bundle, int is_bare) |
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{ |
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const char *end = repo + strlen(repo), *start; |
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char *dir; |
|
|
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/* |
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* Strip trailing spaces, slashes and /.git |
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*/ |
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while (repo < end && (is_dir_sep(end[-1]) || isspace(end[-1]))) |
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end--; |
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if (end - repo > 5 && is_dir_sep(end[-5]) && |
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!strncmp(end - 4, ".git", 4)) { |
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end -= 5; |
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while (repo < end && is_dir_sep(end[-1])) |
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end--; |
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} |
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|
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/* |
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* Find last component, but be prepared that repo could have |
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* the form "remote.example.com:foo.git", i.e. no slash |
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* in the directory part. |
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*/ |
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start = end; |
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while (repo < start && !is_dir_sep(start[-1]) && start[-1] != ':') |
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start--; |
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|
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/* |
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* Strip .{bundle,git}. |
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*/ |
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if (is_bundle) { |
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if (end - start > 7 && !strncmp(end - 7, ".bundle", 7)) |
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end -= 7; |
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} else { |
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if (end - start > 4 && !strncmp(end - 4, ".git", 4)) |
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end -= 4; |
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} |
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|
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if (is_bare) { |
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struct strbuf result = STRBUF_INIT; |
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strbuf_addf(&result, "%.*s.git", (int)(end - start), start); |
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dir = strbuf_detach(&result, NULL); |
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} else |
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dir = xstrndup(start, end - start); |
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/* |
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* Replace sequences of 'control' characters and whitespace |
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* with one ascii space, remove leading and trailing spaces. |
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*/ |
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if (*dir) { |
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char *out = dir; |
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int prev_space = 1 /* strip leading whitespace */; |
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for (end = dir; *end; ++end) { |
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char ch = *end; |
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if ((unsigned char)ch < '\x20') |
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ch = '\x20'; |
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if (isspace(ch)) { |
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if (prev_space) |
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continue; |
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prev_space = 1; |
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} else |
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prev_space = 0; |
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*out++ = ch; |
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} |
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*out = '\0'; |
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if (out > dir && prev_space) |
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out[-1] = '\0'; |
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} |
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return dir; |
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} |
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|
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static void strip_trailing_slashes(char *dir) |
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{ |
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char *end = dir + strlen(dir); |
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|
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while (dir < end - 1 && is_dir_sep(end[-1])) |
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end--; |
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*end = '\0'; |
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} |
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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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|
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ref_git = make_absolute_path(option_reference); |
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|
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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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|
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ref_git_copy = xstrdup(ref_git); |
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|
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add_to_alternates_file(ref_git_copy); |
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|
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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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|
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transport_disconnect(transport); |
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|
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free(ref_git_copy); |
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} |
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|
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static void copy_or_link_directory(struct strbuf *src, struct strbuf *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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|
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dir = opendir(src->buf); |
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if (!dir) |
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die_errno("failed to open '%s'", src->buf); |
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|
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if (mkdir(dest->buf, 0777)) { |
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if (errno != EEXIST) |
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die_errno("failed to create directory '%s'", dest->buf); |
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else if (stat(dest->buf, &buf)) |
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die_errno("failed to stat '%s'", dest->buf); |
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else if (!S_ISDIR(buf.st_mode)) |
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die("%s exists and is not a directory", dest->buf); |
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} |
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|
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strbuf_addch(src, '/'); |
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src_len = src->len; |
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strbuf_addch(dest, '/'); |
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dest_len = dest->len; |
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|
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while ((de = readdir(dir)) != NULL) { |
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strbuf_setlen(src, src_len); |
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strbuf_addstr(src, de->d_name); |
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strbuf_setlen(dest, dest_len); |
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strbuf_addstr(dest, de->d_name); |
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if (stat(src->buf, &buf)) { |
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warning ("failed to stat %s\n", src->buf); |
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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->buf) && errno != ENOENT) |
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die_errno("failed to unlink '%s'", dest->buf); |
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if (!option_no_hardlinks) { |
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if (!link(src->buf, dest->buf)) |
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continue; |
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if (option_local) |
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die_errno("failed to create link '%s'", dest->buf); |
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option_no_hardlinks = 1; |
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} |
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if (copy_file_with_time(dest->buf, src->buf, 0666)) |
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die_errno("failed to copy file to '%s'", dest->buf); |
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} |
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closedir(dir); |
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} |
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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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struct strbuf src = STRBUF_INIT; |
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struct strbuf dest = STRBUF_INIT; |
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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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strbuf_addf(&src, "%s/objects", src_repo); |
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strbuf_addf(&dest, "%s/objects", dest_repo); |
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copy_or_link_directory(&src, &dest); |
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strbuf_release(&src); |
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strbuf_release(&dest); |
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} |
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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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if (0 <= option_verbosity) |
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printf("done.\n"); |
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return ret; |
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} |
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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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static pid_t junk_pid; |
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|
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static void remove_junk(void) |
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{ |
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struct strbuf sb = STRBUF_INIT; |
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if (getpid() != junk_pid) |
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return; |
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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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|
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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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sigchain_pop(signo); |
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raise(signo); |
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} |
|
|
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static struct ref *wanted_peer_refs(const struct ref *refs, |
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struct refspec *refspec) |
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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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get_fetch_map(refs, refspec, &tail, 0); |
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if (!option_mirror) |
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get_fetch_map(refs, tag_refspec, &tail, 0); |
|
|
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return local_refs; |
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} |
|
|
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static void write_remote_refs(const struct ref *local_refs) |
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{ |
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const struct ref *r; |
|
|
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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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} |
|
|
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int cmd_clone(int argc, const char **argv, const char *prefix) |
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{ |
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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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int dest_exists; |
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const struct ref *refs, *remote_head; |
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const struct ref *remote_head_points_at; |
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const struct ref *our_head_points_at; |
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struct ref *mapped_refs; |
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struct strbuf key = STRBUF_INIT, value = STRBUF_INIT; |
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struct strbuf branch_top = STRBUF_INIT, reflog_msg = STRBUF_INIT; |
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struct transport *transport = NULL; |
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char *src_ref_prefix = "refs/heads/"; |
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int err = 0; |
|
|
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struct refspec *refspec; |
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const char *fetch_pattern; |
|
|
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junk_pid = getpid(); |
|
|
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argc = parse_options(argc, argv, prefix, builtin_clone_options, |
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builtin_clone_usage, 0); |
|
|
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if (argc > 2) |
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usage_msg_opt("Too many arguments.", |
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builtin_clone_usage, builtin_clone_options); |
|
|
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if (argc == 0) |
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usage_msg_opt("You must specify a repository to clone.", |
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builtin_clone_usage, builtin_clone_options); |
|
|
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if (option_mirror) |
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option_bare = 1; |
|
|
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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.", |
|
option_origin); |
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option_no_checkout = 1; |
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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 = xstrdup(make_nonrelative_path(repo_name)); |
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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, option_bare); |
|
strip_trailing_slashes(dir); |
|
|
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dest_exists = !stat(dir, &buf); |
|
if (dest_exists && !is_empty_dir(dir)) |
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die("destination path '%s' already exists and is not " |
|
"an empty directory.", dir); |
|
|
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strbuf_addf(&reflog_msg, "clone: from %s", repo); |
|
|
|
if (option_bare) |
|
work_tree = NULL; |
|
else { |
|
work_tree = getenv("GIT_WORK_TREE"); |
|
if (work_tree && !stat(work_tree, &buf)) |
|
die("working tree '%s' already exists.", work_tree); |
|
} |
|
|
|
if (option_bare || work_tree) |
|
git_dir = xstrdup(dir); |
|
else { |
|
work_tree = dir; |
|
git_dir = xstrdup(mkpath("%s/.git", dir)); |
|
} |
|
|
|
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'", |
|
work_tree); |
|
if (!dest_exists && mkdir(work_tree, 0755)) |
|
die_errno("could not create work tree dir '%s'.", |
|
work_tree); |
|
set_git_work_tree(work_tree); |
|
} |
|
junk_git_dir = git_dir; |
|
atexit(remove_junk); |
|
sigchain_push_common(remove_junk_on_signal); |
|
|
|
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)); |
|
|
|
if (0 <= option_verbosity) |
|
printf("Cloning into %s%s...\n", |
|
option_bare ? "bare repository " : "", dir); |
|
init_db(option_template, INIT_DB_QUIET); |
|
|
|
/* |
|
* At this point, the config exists, so we do not need the |
|
* environment variable. We actually need to unset it, too, to |
|
* re-enable parsing of the global configs. |
|
*/ |
|
unsetenv(CONFIG_ENVIRONMENT); |
|
|
|
git_config(git_default_config, NULL); |
|
|
|
if (option_bare) { |
|
if (option_mirror) |
|
src_ref_prefix = "refs/"; |
|
strbuf_addstr(&branch_top, src_ref_prefix); |
|
|
|
git_config_set("core.bare", "true"); |
|
} else { |
|
strbuf_addf(&branch_top, "refs/remotes/%s/", option_origin); |
|
} |
|
|
|
strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top.buf); |
|
|
|
if (option_mirror || !option_bare) { |
|
/* Configure the remote */ |
|
strbuf_addf(&key, "remote.%s.fetch", option_origin); |
|
git_config_set_multivar(key.buf, value.buf, "^$", 0); |
|
strbuf_reset(&key); |
|
|
|
if (option_mirror) { |
|
strbuf_addf(&key, "remote.%s.mirror", option_origin); |
|
git_config_set(key.buf, "true"); |
|
strbuf_reset(&key); |
|
} |
|
} |
|
|
|
strbuf_addf(&key, "remote.%s.url", option_origin); |
|
git_config_set(key.buf, repo); |
|
strbuf_reset(&key); |
|
|
|
if (option_reference) |
|
setup_reference(git_dir); |
|
|
|
fetch_pattern = value.buf; |
|
refspec = parse_fetch_refspec(1, &fetch_pattern); |
|
|
|
strbuf_reset(&value); |
|
|
|
if (path && !is_bundle) { |
|
refs = clone_local(path, git_dir); |
|
mapped_refs = wanted_peer_refs(refs, refspec); |
|
} else { |
|
struct remote *remote = remote_get(option_origin); |
|
transport = transport_get(remote, remote->url[0]); |
|
|
|
if (!transport->get_refs_list || !transport->fetch) |
|
die("Don't know how to clone %s", transport->url); |
|
|
|
transport_set_option(transport, TRANS_OPT_KEEP, "yes"); |
|
|
|
if (option_depth) |
|
transport_set_option(transport, TRANS_OPT_DEPTH, |
|
option_depth); |
|
|
|
transport_set_verbosity(transport, option_verbosity, option_progress); |
|
|
|
if (option_upload_pack) |
|
transport_set_option(transport, TRANS_OPT_UPLOADPACK, |
|
option_upload_pack); |
|
|
|
refs = transport_get_remote_refs(transport); |
|
if (refs) { |
|
mapped_refs = wanted_peer_refs(refs, refspec); |
|
transport_fetch_refs(transport, mapped_refs); |
|
} |
|
} |
|
|
|
if (refs) { |
|
clear_extra_refs(); |
|
|
|
write_remote_refs(mapped_refs); |
|
|
|
remote_head = find_ref_by_name(refs, "HEAD"); |
|
remote_head_points_at = |
|
guess_remote_head(remote_head, mapped_refs, 0); |
|
|
|
if (option_branch) { |
|
struct strbuf head = STRBUF_INIT; |
|
strbuf_addstr(&head, src_ref_prefix); |
|
strbuf_addstr(&head, option_branch); |
|
our_head_points_at = |
|
find_ref_by_name(mapped_refs, head.buf); |
|
strbuf_release(&head); |
|
|
|
if (!our_head_points_at) { |
|
warning("Remote branch %s not found in " |
|
"upstream %s, using HEAD instead", |
|
option_branch, option_origin); |
|
our_head_points_at = remote_head_points_at; |
|
} |
|
} |
|
else |
|
our_head_points_at = remote_head_points_at; |
|
} |
|
else { |
|
warning("You appear to have cloned an empty repository."); |
|
our_head_points_at = NULL; |
|
remote_head_points_at = NULL; |
|
remote_head = NULL; |
|
option_no_checkout = 1; |
|
if (!option_bare) |
|
install_branch_config(0, "master", option_origin, |
|
"refs/heads/master"); |
|
} |
|
|
|
if (remote_head_points_at && !option_bare) { |
|
struct strbuf head_ref = STRBUF_INIT; |
|
strbuf_addstr(&head_ref, branch_top.buf); |
|
strbuf_addstr(&head_ref, "HEAD"); |
|
create_symref(head_ref.buf, |
|
remote_head_points_at->peer_ref->name, |
|
reflog_msg.buf); |
|
} |
|
|
|
if (our_head_points_at) { |
|
/* Local default branch link */ |
|
create_symref("HEAD", our_head_points_at->name, NULL); |
|
if (!option_bare) { |
|
const char *head = skip_prefix(our_head_points_at->name, |
|
"refs/heads/"); |
|
update_ref(reflog_msg.buf, "HEAD", |
|
our_head_points_at->old_sha1, |
|
NULL, 0, DIE_ON_ERR); |
|
install_branch_config(0, head, option_origin, |
|
our_head_points_at->name); |
|
} |
|
} else if (remote_head) { |
|
/* Source had detached HEAD pointing somewhere. */ |
|
if (!option_bare) { |
|
update_ref(reflog_msg.buf, "HEAD", |
|
remote_head->old_sha1, |
|
NULL, REF_NODEREF, DIE_ON_ERR); |
|
our_head_points_at = remote_head; |
|
} |
|
} else { |
|
/* Nothing to checkout out */ |
|
if (!option_no_checkout) |
|
warning("remote HEAD refers to nonexistent ref, " |
|
"unable to checkout.\n"); |
|
option_no_checkout = 1; |
|
} |
|
|
|
if (transport) { |
|
transport_unlock_pack(transport); |
|
transport_disconnect(transport); |
|
} |
|
|
|
if (!option_no_checkout) { |
|
struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file)); |
|
struct unpack_trees_options opts; |
|
struct tree *tree; |
|
struct tree_desc t; |
|
int fd; |
|
|
|
/* We need to be in the new work tree for the checkout */ |
|
setup_work_tree(); |
|
|
|
fd = hold_locked_index(lock_file, 1); |
|
|
|
memset(&opts, 0, sizeof opts); |
|
opts.update = 1; |
|
opts.merge = 1; |
|
opts.fn = oneway_merge; |
|
opts.verbose_update = (option_verbosity > 0); |
|
opts.src_index = &the_index; |
|
opts.dst_index = &the_index; |
|
|
|
tree = parse_tree_indirect(our_head_points_at->old_sha1); |
|
parse_tree(tree); |
|
init_tree_desc(&t, tree->buffer, tree->size); |
|
unpack_trees(1, &t, &opts); |
|
|
|
if (write_cache(fd, active_cache, active_nr) || |
|
commit_locked_index(lock_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", |
|
NULL); |
|
|
|
if (!err && option_recursive) |
|
err = run_command_v_opt(argv_submodule, RUN_GIT_CMD); |
|
} |
|
|
|
strbuf_release(&reflog_msg); |
|
strbuf_release(&branch_top); |
|
strbuf_release(&key); |
|
strbuf_release(&value); |
|
junk_pid = 0; |
|
return err; |
|
}
|
|
|