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![Junio C Hamano](/assets/img/avatar_default.png)
* sr/vcs-helper: tests: handle NO_PYTHON setting builtin-push: don't access freed transport->url Add Python support library for remote helpers Basic build infrastructure for Python scripts Allow helpers to report in "list" command that the ref is unchanged Fix various memory leaks in transport-helper.c Allow helper to map private ref names into normal names Add support for "import" helper command Allow specifying the remote helper in the url Add a config option for remotes to specify a foreign vcs Allow fetch to modify refs Use a function to determine whether a remote is valid Allow programs to not depend on remotes having urls Fix memory leak in helper method for disconnect Conflicts: Documentation/git-remote-helpers.txt Makefile builtin-ls-remote.c builtin-push.c transport-helper.c
666 lines
17 KiB
C
666 lines
17 KiB
C
/*
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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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#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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* 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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static int option_quiet, 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_verbose;
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static struct option builtin_clone_options[] = {
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OPT__QUIET(&option_quiet),
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OPT__VERBOSE(&option_verbose),
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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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OPT_END()
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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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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 (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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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, 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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* 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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* 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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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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static void strip_trailing_slashes(char *dir)
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{
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char *end = dir + strlen(dir);
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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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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(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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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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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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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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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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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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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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static pid_t junk_pid;
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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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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.",
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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);
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strip_trailing_slashes(dir);
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dest_exists = !stat(dir, &buf);
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if (dest_exists && !is_empty_dir(dir))
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die("destination path '%s' already exists and is not "
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"an empty directory.", dir);
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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_errno("could not create leading directories of '%s'",
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work_tree);
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if (!dest_exists && mkdir(work_tree, 0755))
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die_errno("could not create work tree dir '%s'.",
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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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sigchain_push_common(remove_junk_on_signal);
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setenv(CONFIG_ENVIRONMENT, 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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if (option_mirror)
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src_ref_prefix = "refs/";
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strbuf_addstr(&branch_top, src_ref_prefix);
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git_config_set("core.bare", "true");
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} else {
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strbuf_addf(&branch_top, "refs/remotes/%s/", option_origin);
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}
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strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top.buf);
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if (option_mirror || !option_bare) {
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/* Configure the remote */
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strbuf_addf(&key, "remote.%s.fetch", option_origin);
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git_config_set_multivar(key.buf, value.buf, "^$", 0);
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strbuf_reset(&key);
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if (option_mirror) {
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strbuf_addf(&key, "remote.%s.mirror", option_origin);
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git_config_set(key.buf, "true");
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strbuf_reset(&key);
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}
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strbuf_addf(&key, "remote.%s.url", option_origin);
|
|
git_config_set(key.buf, repo);
|
|
strbuf_reset(&key);
|
|
}
|
|
|
|
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(argv[0]);
|
|
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);
|
|
|
|
if (option_quiet)
|
|
transport->verbose = -1;
|
|
else if (option_verbose)
|
|
transport->progress = 1;
|
|
|
|
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_quiet;
|
|
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;
|
|
}
|