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![Junio C Hamano](/assets/img/avatar_default.png)
"git clone -s/-l" is a filesystem level copy and does not offer any protection against source repository being corrupt. While the connectivity validation checks commits and trees being readable, it made the otherwise instantaneous local modes of clone much more expensive, without protecting blob data from bitflips. * jk/maint-clone-shared-no-connectivity-validation: clone: drop connectivity check for local clones
986 lines
26 KiB
C
986 lines
26 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 "builtin.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 "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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#include "connected.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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N_("git clone [options] [--] <repo> [<dir>]"),
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NULL
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};
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static int option_no_checkout, option_bare, option_mirror, option_single_branch = -1;
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static int option_local = -1, option_no_hardlinks, option_shared, option_recursive;
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static char *option_template, *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 const char *real_git_dir;
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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 = -1;
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static struct string_list option_config;
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static struct string_list option_reference;
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static int opt_parse_reference(const struct option *opt, const char *arg, int unset)
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{
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struct string_list *option_reference = opt->value;
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if (!arg)
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return -1;
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string_list_append(option_reference, arg);
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return 0;
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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_BOOL(0, "progress", &option_progress,
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N_("force progress reporting")),
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OPT_BOOLEAN('n', "no-checkout", &option_no_checkout,
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N_("don't create a checkout")),
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OPT_BOOLEAN(0, "bare", &option_bare, N_("create a bare repository")),
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{ OPTION_BOOLEAN, 0, "naked", &option_bare, NULL,
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N_("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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N_("create a mirror repository (implies bare)")),
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OPT_BOOL('l', "local", &option_local,
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N_("to clone from a local repository")),
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OPT_BOOLEAN(0, "no-hardlinks", &option_no_hardlinks,
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N_("don't use local hardlinks, always copy")),
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OPT_BOOLEAN('s', "shared", &option_shared,
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N_("setup as shared repository")),
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OPT_BOOLEAN(0, "recursive", &option_recursive,
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N_("initialize submodules in the clone")),
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OPT_BOOLEAN(0, "recurse-submodules", &option_recursive,
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N_("initialize submodules in the clone")),
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OPT_STRING(0, "template", &option_template, N_("template-directory"),
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N_("directory from which templates will be used")),
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OPT_CALLBACK(0 , "reference", &option_reference, N_("repo"),
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N_("reference repository"), &opt_parse_reference),
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OPT_STRING('o', "origin", &option_origin, N_("name"),
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N_("use <name> instead of 'origin' to track upstream")),
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OPT_STRING('b', "branch", &option_branch, N_("branch"),
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N_("checkout <branch> instead of the remote's HEAD")),
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OPT_STRING('u', "upload-pack", &option_upload_pack, N_("path"),
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N_("path to git-upload-pack on the remote")),
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OPT_STRING(0, "depth", &option_depth, N_("depth"),
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N_("create a shallow clone of that depth")),
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OPT_BOOL(0, "single-branch", &option_single_branch,
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N_("clone only one branch, HEAD or --branch")),
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OPT_STRING(0, "separate-git-dir", &real_git_dir, N_("gitdir"),
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N_("separate git dir from working tree")),
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OPT_STRING_LIST('c', "config", &option_config, N_("key=value"),
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N_("set config inside the new repository")),
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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/.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))
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continue;
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if (S_ISDIR(st.st_mode) && is_git_directory(path)) {
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*is_bundle = 0;
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return xstrdup(absolute_path(path));
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} else if (S_ISREG(st.st_mode) && st.st_size > 8) {
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/* Is it a "gitfile"? */
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char signature[8];
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int len, fd = open(path, O_RDONLY);
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if (fd < 0)
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continue;
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len = read_in_full(fd, signature, 8);
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close(fd);
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if (len != 8 || strncmp(signature, "gitdir: ", 8))
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continue;
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path = read_gitfile(path);
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if (path) {
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*is_bundle = 0;
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return xstrdup(absolute_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(absolute_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 int add_one_reference(struct string_list_item *item, void *cb_data)
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{
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char *ref_git;
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const char *repo;
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struct strbuf alternate = STRBUF_INIT;
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/* Beware: read_gitfile(), real_path() and mkpath() return static buffer */
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ref_git = xstrdup(real_path(item->string));
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repo = read_gitfile(ref_git);
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if (!repo)
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repo = read_gitfile(mkpath("%s/.git", ref_git));
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if (repo) {
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free(ref_git);
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ref_git = xstrdup(repo);
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}
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if (!repo && is_directory(mkpath("%s/.git/objects", ref_git))) {
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char *ref_git_git = mkpathdup("%s/.git", ref_git);
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free(ref_git);
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ref_git = ref_git_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 repository."),
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item->string);
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strbuf_addf(&alternate, "%s/objects", ref_git);
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add_to_alternates_file(alternate.buf);
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strbuf_release(&alternate);
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free(ref_git);
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return 0;
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}
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static void setup_reference(void)
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{
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for_each_string_list(&option_reference, add_one_reference, NULL);
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}
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static void copy_alternates(struct strbuf *src, struct strbuf *dst,
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const char *src_repo)
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{
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/*
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* Read from the source objects/info/alternates file
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* and copy the entries to corresponding file in the
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* destination repository with add_to_alternates_file().
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* Both src and dst have "$path/objects/info/alternates".
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*
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* Instead of copying bit-for-bit from the original,
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* we need to append to existing one so that the already
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* created entry via "clone -s" is not lost, and also
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* to turn entries with paths relative to the original
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* absolute, so that they can be used in the new repository.
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*/
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FILE *in = fopen(src->buf, "r");
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struct strbuf line = STRBUF_INIT;
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while (strbuf_getline(&line, in, '\n') != EOF) {
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char *abs_path, abs_buf[PATH_MAX];
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if (!line.len || line.buf[0] == '#')
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continue;
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if (is_absolute_path(line.buf)) {
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add_to_alternates_file(line.buf);
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continue;
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}
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abs_path = mkpath("%s/objects/%s", src_repo, line.buf);
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normalize_path_copy(abs_buf, abs_path);
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add_to_alternates_file(abs_buf);
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}
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strbuf_release(&line);
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fclose(in);
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}
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static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest,
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const char *src_repo, int src_baselen)
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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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src_repo, src_baselen);
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continue;
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}
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/* Files that cannot be copied bit-for-bit... */
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if (!strcmp(src->buf + src_baselen, "/info/alternates")) {
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copy_alternates(src, dest, src_repo);
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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 > 0)
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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 void clone_local(const char *src_repo, const char *dest_repo)
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{
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if (option_shared) {
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struct strbuf alt = STRBUF_INIT;
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strbuf_addf(&alt, "%s/objects", src_repo);
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add_to_alternates_file(alt.buf);
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strbuf_release(&alt);
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} else {
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struct strbuf src = STRBUF_INIT;
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struct strbuf dest = STRBUF_INIT;
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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, src_repo, src.len);
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strbuf_release(&src);
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strbuf_release(&dest);
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}
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if (0 <= option_verbosity)
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printf(_("done.\n"));
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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 enum {
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JUNK_LEAVE_NONE,
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JUNK_LEAVE_REPO,
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JUNK_LEAVE_ALL
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} junk_mode = JUNK_LEAVE_NONE;
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static const char junk_leave_repo_msg[] =
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N_("Clone succeeded, but checkout failed.\n"
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"You can inspect what was checked out with 'git status'\n"
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"and retry the checkout with 'git checkout -f HEAD'\n");
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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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switch (junk_mode) {
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case JUNK_LEAVE_REPO:
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warning("%s", _(junk_leave_repo_msg));
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/* fall-through */
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case JUNK_LEAVE_ALL:
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return;
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default:
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/* proceed to removal */
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break;
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}
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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 *find_remote_branch(const struct ref *refs, const char *branch)
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{
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struct ref *ref;
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struct strbuf head = STRBUF_INIT;
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strbuf_addstr(&head, "refs/heads/");
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strbuf_addstr(&head, branch);
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ref = find_ref_by_name(refs, head.buf);
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strbuf_release(&head);
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|
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if (ref)
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return ref;
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strbuf_addstr(&head, "refs/tags/");
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strbuf_addstr(&head, branch);
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ref = find_ref_by_name(refs, head.buf);
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strbuf_release(&head);
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return ref;
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}
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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 *head = copy_ref(find_ref_by_name(refs, "HEAD"));
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struct ref *local_refs = head;
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struct ref **tail = head ? &head->next : &local_refs;
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|
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if (option_single_branch) {
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struct ref *remote_head = NULL;
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|
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if (!option_branch)
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remote_head = guess_remote_head(head, refs, 0);
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else {
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local_refs = NULL;
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tail = &local_refs;
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remote_head = copy_ref(find_remote_branch(refs, option_branch));
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}
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|
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if (!remote_head && option_branch)
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warning(_("Could not find remote branch %s to clone."),
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option_branch);
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else {
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get_fetch_map(remote_head, refspec, &tail, 0);
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|
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/* if --branch=tag, pull the requested tag explicitly */
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get_fetch_map(remote_head, tag_refspec, &tail, 0);
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}
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} else
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get_fetch_map(refs, refspec, &tail, 0);
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|
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if (!option_mirror && !option_single_branch)
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|
get_fetch_map(refs, tag_refspec, &tail, 0);
|
|
|
|
return local_refs;
|
|
}
|
|
|
|
static void write_remote_refs(const struct ref *local_refs)
|
|
{
|
|
const struct ref *r;
|
|
|
|
lock_packed_refs(LOCK_DIE_ON_ERROR);
|
|
|
|
for (r = local_refs; r; r = r->next) {
|
|
if (!r->peer_ref)
|
|
continue;
|
|
add_packed_ref(r->peer_ref->name, r->old_sha1);
|
|
}
|
|
|
|
if (commit_packed_refs())
|
|
die_errno("unable to overwrite old ref-pack file");
|
|
}
|
|
|
|
static void write_followtags(const struct ref *refs, const char *msg)
|
|
{
|
|
const struct ref *ref;
|
|
for (ref = refs; ref; ref = ref->next) {
|
|
if (prefixcmp(ref->name, "refs/tags/"))
|
|
continue;
|
|
if (!suffixcmp(ref->name, "^{}"))
|
|
continue;
|
|
if (!has_sha1_file(ref->old_sha1))
|
|
continue;
|
|
update_ref(msg, ref->name, ref->old_sha1,
|
|
NULL, 0, DIE_ON_ERR);
|
|
}
|
|
}
|
|
|
|
static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
|
|
{
|
|
struct ref **rm = cb_data;
|
|
struct ref *ref = *rm;
|
|
|
|
/*
|
|
* Skip anything missing a peer_ref, which we are not
|
|
* actually going to write a ref for.
|
|
*/
|
|
while (ref && !ref->peer_ref)
|
|
ref = ref->next;
|
|
/* Returning -1 notes "end of list" to the caller. */
|
|
if (!ref)
|
|
return -1;
|
|
|
|
hashcpy(sha1, ref->old_sha1);
|
|
*rm = ref->next;
|
|
return 0;
|
|
}
|
|
|
|
static void update_remote_refs(const struct ref *refs,
|
|
const struct ref *mapped_refs,
|
|
const struct ref *remote_head_points_at,
|
|
const char *branch_top,
|
|
const char *msg,
|
|
struct transport *transport,
|
|
int check_connectivity)
|
|
{
|
|
const struct ref *rm = mapped_refs;
|
|
|
|
if (check_connectivity) {
|
|
if (0 <= option_verbosity)
|
|
printf(_("Checking connectivity... "));
|
|
if (check_everything_connected_with_transport(iterate_ref_map,
|
|
0, &rm, transport))
|
|
die(_("remote did not send all necessary objects"));
|
|
if (0 <= option_verbosity)
|
|
printf(_("done\n"));
|
|
}
|
|
|
|
if (refs) {
|
|
write_remote_refs(mapped_refs);
|
|
if (option_single_branch)
|
|
write_followtags(refs, msg);
|
|
}
|
|
|
|
if (remote_head_points_at && !option_bare) {
|
|
struct strbuf head_ref = STRBUF_INIT;
|
|
strbuf_addstr(&head_ref, branch_top);
|
|
strbuf_addstr(&head_ref, "HEAD");
|
|
create_symref(head_ref.buf,
|
|
remote_head_points_at->peer_ref->name,
|
|
msg);
|
|
}
|
|
}
|
|
|
|
static void update_head(const struct ref *our, const struct ref *remote,
|
|
const char *msg)
|
|
{
|
|
if (our && !prefixcmp(our->name, "refs/heads/")) {
|
|
/* Local default branch link */
|
|
create_symref("HEAD", our->name, NULL);
|
|
if (!option_bare) {
|
|
const char *head = skip_prefix(our->name, "refs/heads/");
|
|
update_ref(msg, "HEAD", our->old_sha1, NULL, 0, DIE_ON_ERR);
|
|
install_branch_config(0, head, option_origin, our->name);
|
|
}
|
|
} else if (our) {
|
|
struct commit *c = lookup_commit_reference(our->old_sha1);
|
|
/* --branch specifies a non-branch (i.e. tags), detach HEAD */
|
|
update_ref(msg, "HEAD", c->object.sha1,
|
|
NULL, REF_NODEREF, DIE_ON_ERR);
|
|
} else if (remote) {
|
|
/*
|
|
* We know remote HEAD points to a non-branch, or
|
|
* HEAD points to a branch but we don't know which one.
|
|
* Detach HEAD in all these cases.
|
|
*/
|
|
update_ref(msg, "HEAD", remote->old_sha1,
|
|
NULL, REF_NODEREF, DIE_ON_ERR);
|
|
}
|
|
}
|
|
|
|
static int checkout(void)
|
|
{
|
|
unsigned char sha1[20];
|
|
char *head;
|
|
struct lock_file *lock_file;
|
|
struct unpack_trees_options opts;
|
|
struct tree *tree;
|
|
struct tree_desc t;
|
|
int err = 0, fd;
|
|
|
|
if (option_no_checkout)
|
|
return 0;
|
|
|
|
head = resolve_refdup("HEAD", sha1, 1, NULL);
|
|
if (!head) {
|
|
warning(_("remote HEAD refers to nonexistent ref, "
|
|
"unable to checkout.\n"));
|
|
return 0;
|
|
}
|
|
if (!strcmp(head, "HEAD")) {
|
|
if (advice_detached_head)
|
|
detach_advice(sha1_to_hex(sha1));
|
|
} else {
|
|
if (prefixcmp(head, "refs/heads/"))
|
|
die(_("HEAD not found below refs/heads!"));
|
|
}
|
|
free(head);
|
|
|
|
/* We need to be in the new work tree for the checkout */
|
|
setup_work_tree();
|
|
|
|
lock_file = xcalloc(1, sizeof(struct lock_file));
|
|
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(sha1);
|
|
parse_tree(tree);
|
|
init_tree_desc(&t, tree->buffer, tree->size);
|
|
if (unpack_trees(1, &t, &opts) < 0)
|
|
die(_("unable to checkout working tree"));
|
|
|
|
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(sha1), "1", NULL);
|
|
|
|
if (!err && option_recursive)
|
|
err = run_command_v_opt(argv_submodule, RUN_GIT_CMD);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int write_one_config(const char *key, const char *value, void *data)
|
|
{
|
|
return git_config_set_multivar(key, value ? value : "true", "^$", 0);
|
|
}
|
|
|
|
static void write_config(struct string_list *config)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < config->nr; i++) {
|
|
if (git_config_parse_parameter(config->items[i].string,
|
|
write_one_config, NULL) < 0)
|
|
die("unable to write parameters to config file");
|
|
}
|
|
}
|
|
|
|
static void write_refspec_config(const char* src_ref_prefix,
|
|
const struct ref* our_head_points_at,
|
|
const struct ref* remote_head_points_at, struct strbuf* branch_top)
|
|
{
|
|
struct strbuf key = STRBUF_INIT;
|
|
struct strbuf value = STRBUF_INIT;
|
|
|
|
if (option_mirror || !option_bare) {
|
|
if (option_single_branch && !option_mirror) {
|
|
if (option_branch) {
|
|
if (strstr(our_head_points_at->name, "refs/tags/"))
|
|
strbuf_addf(&value, "+%s:%s", our_head_points_at->name,
|
|
our_head_points_at->name);
|
|
else
|
|
strbuf_addf(&value, "+%s:%s%s", our_head_points_at->name,
|
|
branch_top->buf, option_branch);
|
|
} else if (remote_head_points_at) {
|
|
strbuf_addf(&value, "+%s:%s%s", remote_head_points_at->name,
|
|
branch_top->buf,
|
|
skip_prefix(remote_head_points_at->name, "refs/heads/"));
|
|
}
|
|
/*
|
|
* otherwise, the next "git fetch" will
|
|
* simply fetch from HEAD without updating
|
|
* any remote-tracking branch, which is what
|
|
* we want.
|
|
*/
|
|
} else {
|
|
strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top->buf);
|
|
}
|
|
/* Configure the remote */
|
|
if (value.len) {
|
|
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_release(&key);
|
|
strbuf_release(&value);
|
|
}
|
|
|
|
int cmd_clone(int argc, const char **argv, const char *prefix)
|
|
{
|
|
int is_bundle = 0, is_local;
|
|
struct stat buf;
|
|
const char *repo_name, *repo, *work_tree, *git_dir;
|
|
char *path, *dir;
|
|
int dest_exists;
|
|
const struct ref *refs, *remote_head;
|
|
const struct ref *remote_head_points_at;
|
|
const struct ref *our_head_points_at;
|
|
struct ref *mapped_refs;
|
|
const struct ref *ref;
|
|
struct strbuf key = STRBUF_INIT, value = STRBUF_INIT;
|
|
struct strbuf branch_top = STRBUF_INIT, reflog_msg = STRBUF_INIT;
|
|
struct transport *transport = NULL;
|
|
const char *src_ref_prefix = "refs/heads/";
|
|
struct remote *remote;
|
|
int err = 0, complete_refs_before_fetch = 1;
|
|
|
|
struct refspec *refspec;
|
|
const char *fetch_pattern;
|
|
|
|
junk_pid = getpid();
|
|
|
|
packet_trace_identity("clone");
|
|
argc = parse_options(argc, argv, prefix, builtin_clone_options,
|
|
builtin_clone_usage, 0);
|
|
|
|
if (argc > 2)
|
|
usage_msg_opt(_("Too many arguments."),
|
|
builtin_clone_usage, builtin_clone_options);
|
|
|
|
if (argc == 0)
|
|
usage_msg_opt(_("You must specify a repository to clone."),
|
|
builtin_clone_usage, builtin_clone_options);
|
|
|
|
if (option_single_branch == -1)
|
|
option_single_branch = option_depth ? 1 : 0;
|
|
|
|
if (option_mirror)
|
|
option_bare = 1;
|
|
|
|
if (option_bare) {
|
|
if (option_origin)
|
|
die(_("--bare and --origin %s options are incompatible."),
|
|
option_origin);
|
|
if (real_git_dir)
|
|
die(_("--bare and --separate-git-dir are incompatible."));
|
|
option_no_checkout = 1;
|
|
}
|
|
|
|
if (!option_origin)
|
|
option_origin = "origin";
|
|
|
|
repo_name = argv[0];
|
|
|
|
path = get_repo_path(repo_name, &is_bundle);
|
|
if (path)
|
|
repo = xstrdup(absolute_path(repo_name));
|
|
else if (!strchr(repo_name, ':'))
|
|
die(_("repository '%s' does not exist"), repo_name);
|
|
else
|
|
repo = repo_name;
|
|
is_local = option_local != 0 && path && !is_bundle;
|
|
if (is_local && option_depth)
|
|
warning(_("--depth is ignored in local clones; use file:// instead."));
|
|
if (option_local > 0 && !is_local)
|
|
warning(_("--local is ignored"));
|
|
|
|
if (argc == 2)
|
|
dir = xstrdup(argv[1]);
|
|
else
|
|
dir = guess_dir_name(repo_name, is_bundle, option_bare);
|
|
strip_trailing_slashes(dir);
|
|
|
|
dest_exists = !stat(dir, &buf);
|
|
if (dest_exists && !is_empty_dir(dir))
|
|
die(_("destination path '%s' already exists and is not "
|
|
"an empty directory."), dir);
|
|
|
|
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 = mkpathdup("%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, 0777))
|
|
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);
|
|
|
|
if (safe_create_leading_directories_const(git_dir) < 0)
|
|
die(_("could not create leading directories of '%s'"), git_dir);
|
|
|
|
set_git_dir_init(git_dir, real_git_dir, 0);
|
|
if (real_git_dir) {
|
|
git_dir = real_git_dir;
|
|
junk_git_dir = real_git_dir;
|
|
}
|
|
|
|
if (0 <= option_verbosity) {
|
|
if (option_bare)
|
|
printf(_("Cloning into bare repository '%s'...\n"), dir);
|
|
else
|
|
printf(_("Cloning into '%s'...\n"), dir);
|
|
}
|
|
init_db(option_template, INIT_DB_QUIET);
|
|
write_config(&option_config);
|
|
|
|
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);
|
|
strbuf_addf(&key, "remote.%s.url", option_origin);
|
|
git_config_set(key.buf, repo);
|
|
strbuf_reset(&key);
|
|
|
|
if (option_reference.nr)
|
|
setup_reference();
|
|
|
|
fetch_pattern = value.buf;
|
|
refspec = parse_fetch_refspec(1, &fetch_pattern);
|
|
|
|
strbuf_reset(&value);
|
|
|
|
remote = remote_get(option_origin);
|
|
transport = transport_get(remote, remote->url[0]);
|
|
|
|
if (!is_local) {
|
|
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_single_branch)
|
|
transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
|
|
|
|
transport_set_verbosity(transport, option_verbosity, option_progress);
|
|
|
|
if (option_upload_pack)
|
|
transport_set_option(transport, TRANS_OPT_UPLOADPACK,
|
|
option_upload_pack);
|
|
|
|
if (transport->smart_options && !option_depth)
|
|
transport->smart_options->check_self_contained_and_connected = 1;
|
|
}
|
|
|
|
refs = transport_get_remote_refs(transport);
|
|
|
|
if (refs) {
|
|
mapped_refs = wanted_peer_refs(refs, refspec);
|
|
/*
|
|
* transport_get_remote_refs() may return refs with null sha-1
|
|
* in mapped_refs (see struct transport->get_refs_list
|
|
* comment). In that case we need fetch it early because
|
|
* remote_head code below relies on it.
|
|
*
|
|
* for normal clones, transport_get_remote_refs() should
|
|
* return reliable ref set, we can delay cloning until after
|
|
* remote HEAD check.
|
|
*/
|
|
for (ref = refs; ref; ref = ref->next)
|
|
if (is_null_sha1(ref->old_sha1)) {
|
|
complete_refs_before_fetch = 0;
|
|
break;
|
|
}
|
|
|
|
if (!is_local && !complete_refs_before_fetch)
|
|
transport_fetch_refs(transport, 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) {
|
|
our_head_points_at =
|
|
find_remote_branch(mapped_refs, option_branch);
|
|
|
|
if (!our_head_points_at)
|
|
die(_("Remote branch %s not found in upstream %s"),
|
|
option_branch, option_origin);
|
|
}
|
|
else
|
|
our_head_points_at = remote_head_points_at;
|
|
}
|
|
else {
|
|
warning(_("You appear to have cloned an empty repository."));
|
|
mapped_refs = NULL;
|
|
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");
|
|
}
|
|
|
|
write_refspec_config(src_ref_prefix, our_head_points_at,
|
|
remote_head_points_at, &branch_top);
|
|
|
|
if (is_local)
|
|
clone_local(path, git_dir);
|
|
else if (refs && complete_refs_before_fetch)
|
|
transport_fetch_refs(transport, mapped_refs);
|
|
|
|
update_remote_refs(refs, mapped_refs, remote_head_points_at,
|
|
branch_top.buf, reflog_msg.buf, transport, !is_local);
|
|
|
|
update_head(our_head_points_at, remote_head, reflog_msg.buf);
|
|
|
|
transport_unlock_pack(transport);
|
|
transport_disconnect(transport);
|
|
|
|
junk_mode = JUNK_LEAVE_REPO;
|
|
err = checkout();
|
|
|
|
strbuf_release(&reflog_msg);
|
|
strbuf_release(&branch_top);
|
|
strbuf_release(&key);
|
|
strbuf_release(&value);
|
|
junk_mode = JUNK_LEAVE_ALL;
|
|
return err;
|
|
}
|