Build in clone
Thanks to Johannes Schindelin for various comments and improvements, including supporting cloning full bundles. Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Daniel Barkalow
Junio C Hamano
parent
f225aeb278
commit
8434c2f1af
2
Makefile
2
Makefile
@ -235,7 +235,6 @@ BASIC_LDFLAGS =
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SCRIPT_SH += git-am.sh
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SCRIPT_SH += git-bisect.sh
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SCRIPT_SH += git-clone.sh
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SCRIPT_SH += git-filter-branch.sh
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SCRIPT_SH += git-lost-found.sh
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SCRIPT_SH += git-merge-octopus.sh
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@ -481,6 +480,7 @@ BUILTIN_OBJS += builtin-check-ref-format.o
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BUILTIN_OBJS += builtin-checkout-index.o
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BUILTIN_OBJS += builtin-checkout.o
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BUILTIN_OBJS += builtin-clean.o
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BUILTIN_OBJS += builtin-clone.o
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BUILTIN_OBJS += builtin-commit-tree.o
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BUILTIN_OBJS += builtin-commit.o
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BUILTIN_OBJS += builtin-config.o
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544
builtin-clone.c
Normal file
544
builtin-clone.c
Normal file
@ -0,0 +1,544 @@
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/*
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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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/*
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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;
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static int option_local, option_no_hardlinks, option_shared;
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static char *option_template, *option_reference, *option_depth;
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static char *option_origin = NULL;
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static char *option_upload_pack = "git-upload-pack";
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static struct option builtin_clone_options[] = {
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OPT__QUIET(&option_quiet),
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OPT_BOOLEAN('n', "no-checkout", &option_no_checkout,
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"don't create a checkout"),
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OPT_BOOLEAN(0, "bare", &option_bare, "create a bare repository"),
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OPT_BOOLEAN(0, "naked", &option_bare, "create a bare repository"),
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OPT_BOOLEAN('l', "local", &option_local,
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"to clone from a local repository"),
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OPT_BOOLEAN(0, "no-hardlinks", &option_no_hardlinks,
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"don't use local hardlinks, always copy"),
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OPT_BOOLEAN('s', "shared", &option_shared,
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"setup as shared repository"),
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OPT_STRING(0, "template", &option_template, "path",
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"path the template repository"),
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OPT_STRING(0, "reference", &option_reference, "repo",
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"reference repository"),
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OPT_STRING('o', "origin", &option_origin, "branch",
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"use <branch> instead or 'origin' to track upstream"),
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OPT_STRING('u', "upload-pack", &option_upload_pack, "path",
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"path to git-upload-pack on the remote"),
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OPT_STRING(0, "depth", &option_depth, "depth",
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"create a shallow clone of that depth"),
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OPT_END()
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};
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static char *get_repo_path(const char *repo, int *is_bundle)
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{
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static char *suffix[] = { "/.git", ".git", "" };
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static char *bundle_suffix[] = { ".bundle", "" };
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struct stat st;
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int i;
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for (i = 0; i < ARRAY_SIZE(suffix); i++) {
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const char *path;
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path = mkpath("%s%s", repo, suffix[i]);
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if (!stat(path, &st) && S_ISDIR(st.st_mode)) {
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*is_bundle = 0;
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return xstrdup(make_absolute_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_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)
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{
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const char *p, *start, *end, *limit;
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int after_slash_or_colon;
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/* Guess dir name from repository: strip trailing '/',
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* strip trailing '[:/]*.{git,bundle}', strip leading '.*[/:]'. */
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after_slash_or_colon = 1;
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limit = repo + strlen(repo);
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start = repo;
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end = limit;
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for (p = repo; p < limit; p++) {
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const char *prefix = is_bundle ? ".bundle" : ".git";
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if (!prefixcmp(p, prefix)) {
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if (!after_slash_or_colon)
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end = p;
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p += strlen(prefix) - 1;
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} else if (!prefixcmp(p, ".bundle")) {
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if (!after_slash_or_colon)
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end = p;
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p += 7;
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} else if (*p == '/' || *p == ':') {
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if (end == limit)
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end = p;
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after_slash_or_colon = 1;
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} else if (after_slash_or_colon) {
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start = p;
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end = limit;
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after_slash_or_colon = 0;
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}
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}
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return xstrndup(start, end - start);
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}
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static int is_directory(const char *path)
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{
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struct stat buf;
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return !stat(path, &buf) && S_ISDIR(buf.st_mode);
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}
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static void setup_reference(const char *repo)
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{
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const char *ref_git;
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char *ref_git_copy;
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struct remote *remote;
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struct transport *transport;
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const struct ref *extra;
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ref_git = make_absolute_path(option_reference);
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if (is_directory(mkpath("%s/.git/objects", ref_git)))
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ref_git = mkpath("%s/.git", ref_git);
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else if (!is_directory(mkpath("%s/objects", ref_git)))
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die("reference repository '%s' is not a local directory.",
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option_reference);
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ref_git_copy = xstrdup(ref_git);
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add_to_alternates_file(ref_git_copy);
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remote = remote_get(ref_git_copy);
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transport = transport_get(remote, ref_git_copy);
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for (extra = transport_get_remote_refs(transport); extra;
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extra = extra->next)
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add_extra_ref(extra->name, extra->old_sha1, 0);
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transport_disconnect(transport);
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free(ref_git_copy);
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}
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static void copy_or_link_directory(char *src, char *dest)
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{
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struct dirent *de;
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struct stat buf;
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int src_len, dest_len;
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DIR *dir;
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dir = opendir(src);
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if (!dir)
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die("failed to open %s\n", src);
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if (mkdir(dest, 0777)) {
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if (errno != EEXIST)
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die("failed to create directory %s\n", dest);
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else if (stat(dest, &buf))
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die("failed to stat %s\n", dest);
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else if (!S_ISDIR(buf.st_mode))
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die("%s exists and is not a directory\n", dest);
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}
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src_len = strlen(src);
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src[src_len] = '/';
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dest_len = strlen(dest);
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dest[dest_len] = '/';
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while ((de = readdir(dir)) != NULL) {
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strcpy(src + src_len + 1, de->d_name);
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strcpy(dest + dest_len + 1, de->d_name);
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if (stat(src, &buf)) {
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warning ("failed to stat %s\n", src);
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continue;
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}
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if (S_ISDIR(buf.st_mode)) {
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if (de->d_name[0] != '.')
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copy_or_link_directory(src, dest);
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continue;
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}
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if (unlink(dest) && errno != ENOENT)
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die("failed to unlink %s\n", dest);
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if (option_no_hardlinks) {
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if (copy_file(dest, src, 0666))
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die("failed to copy file to %s\n", dest);
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} else {
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if (link(src, dest))
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die("failed to create link %s\n", dest);
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}
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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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char src[PATH_MAX];
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char dest[PATH_MAX];
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struct remote *remote;
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struct transport *transport;
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if (option_shared)
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add_to_alternates_file(src_repo);
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else {
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snprintf(src, PATH_MAX, "%s/objects", src_repo);
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snprintf(dest, PATH_MAX, "%s/objects", dest_repo);
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copy_or_link_directory(src, dest);
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}
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remote = remote_get(src_repo);
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transport = transport_get(remote, src_repo);
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ret = transport_get_remote_refs(transport);
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transport_disconnect(transport);
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return ret;
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}
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static const char *junk_work_tree;
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static const char *junk_git_dir;
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pid_t junk_pid;
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static void remove_junk(void)
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{
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struct strbuf sb;
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if (getpid() != junk_pid)
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return;
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strbuf_init(&sb, 0);
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if (junk_git_dir) {
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strbuf_addstr(&sb, junk_git_dir);
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remove_dir_recursively(&sb, 0);
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strbuf_reset(&sb);
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}
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if (junk_work_tree) {
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strbuf_addstr(&sb, junk_work_tree);
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remove_dir_recursively(&sb, 0);
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strbuf_reset(&sb);
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}
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}
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static void remove_junk_on_signal(int signo)
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{
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remove_junk();
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signal(SIGINT, SIG_DFL);
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raise(signo);
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}
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static const struct ref *locate_head(const struct ref *refs,
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const struct ref *mapped_refs,
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const struct ref **remote_head_p)
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{
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const struct ref *remote_head = NULL;
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const struct ref *remote_master = NULL;
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const struct ref *r;
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for (r = refs; r; r = r->next)
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if (!strcmp(r->name, "HEAD"))
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remote_head = r;
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for (r = mapped_refs; r; r = r->next)
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if (!strcmp(r->name, "refs/heads/master"))
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remote_master = r;
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if (remote_head_p)
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*remote_head_p = remote_head;
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/* If there's no HEAD value at all, never mind. */
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if (!remote_head)
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return NULL;
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/* If refs/heads/master could be right, it is. */
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if (remote_master && !hashcmp(remote_master->old_sha1,
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remote_head->old_sha1))
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return remote_master;
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/* Look for another ref that points there */
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for (r = mapped_refs; r; r = r->next)
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if (r != remote_head &&
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!hashcmp(r->old_sha1, remote_head->old_sha1))
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return r;
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/* Nothing is the same */
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return NULL;
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}
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static struct ref *write_remote_refs(const struct ref *refs,
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struct refspec *refspec, const char *reflog)
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{
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struct ref *local_refs = NULL;
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struct ref **tail = &local_refs;
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struct ref *r;
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get_fetch_map(refs, refspec, &tail, 0);
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get_fetch_map(refs, tag_refspec, &tail, 0);
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for (r = local_refs; r; r = r->next)
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update_ref(reflog,
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r->peer_ref->name, r->old_sha1, NULL, 0, DIE_ON_ERR);
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return local_refs;
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}
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int cmd_clone(int argc, const char **argv, const char *prefix)
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{
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int use_local_hardlinks = 1;
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int use_separate_remote = 1;
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int is_bundle = 0;
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struct stat buf;
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const char *repo_name, *repo, *work_tree, *git_dir;
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char *path, *dir;
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const struct ref *refs, *head_points_at, *remote_head, *mapped_refs;
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char branch_top[256], key[256], value[256];
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struct strbuf reflog_msg;
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struct refspec refspec;
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junk_pid = getpid();
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argc = parse_options(argc, argv, builtin_clone_options,
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builtin_clone_usage, 0);
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if (argc == 0)
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die("You must specify a repository to clone.");
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if (option_no_hardlinks)
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use_local_hardlinks = 0;
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if (option_bare) {
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if (option_origin)
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die("--bare and --origin %s options are incompatible.",
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option_origin);
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option_no_checkout = 1;
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use_separate_remote = 0;
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}
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if (!option_origin)
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option_origin = "origin";
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repo_name = argv[0];
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path = get_repo_path(repo_name, &is_bundle);
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if (path)
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repo = path;
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else if (!strchr(repo_name, ':'))
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repo = xstrdup(make_absolute_path(repo_name));
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else
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repo = repo_name;
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if (argc == 2)
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dir = xstrdup(argv[1]);
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else
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dir = guess_dir_name(repo_name, is_bundle);
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if (!stat(dir, &buf))
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die("destination directory '%s' already exists.", dir);
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strbuf_init(&reflog_msg, 0);
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strbuf_addf(&reflog_msg, "clone: from %s", repo);
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if (option_bare)
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work_tree = NULL;
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else {
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work_tree = getenv("GIT_WORK_TREE");
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if (work_tree && !stat(work_tree, &buf))
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die("working tree '%s' already exists.", work_tree);
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}
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if (option_bare || work_tree)
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git_dir = xstrdup(dir);
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else {
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work_tree = dir;
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git_dir = xstrdup(mkpath("%s/.git", dir));
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}
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if (!option_bare) {
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junk_work_tree = work_tree;
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if (mkdir(work_tree, 0755))
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die("could not create work tree dir '%s'.", work_tree);
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set_git_work_tree(work_tree);
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}
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junk_git_dir = git_dir;
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atexit(remove_junk);
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signal(SIGINT, remove_junk_on_signal);
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setenv(CONFIG_ENVIRONMENT, xstrdup(mkpath("%s/config", git_dir)), 1);
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set_git_dir(make_absolute_path(git_dir));
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fprintf(stderr, "Initialize %s\n", git_dir);
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init_db(option_template, option_quiet ? INIT_DB_QUIET : 0);
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if (option_reference)
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setup_reference(git_dir);
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git_config(git_default_config);
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if (option_bare) {
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strcpy(branch_top, "refs/heads/");
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git_config_set("core.bare", "true");
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} else {
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snprintf(branch_top, sizeof(branch_top),
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"refs/remotes/%s/", option_origin);
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/* Configure the remote */
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snprintf(key, sizeof(key), "remote.%s.url", option_origin);
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git_config_set(key, repo);
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snprintf(key, sizeof(key), "remote.%s.fetch", option_origin);
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snprintf(value, sizeof(value),
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"+refs/heads/*:%s*", branch_top);
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git_config_set_multivar(key, value, "^$", 0);
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}
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refspec.force = 0;
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refspec.pattern = 1;
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refspec.src = "refs/heads/";
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refspec.dst = branch_top;
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if (path && !is_bundle)
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refs = clone_local(path, git_dir);
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else {
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struct remote *remote = remote_get(argv[0]);
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struct transport *transport = transport_get(remote, argv[0]);
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transport_set_option(transport, TRANS_OPT_KEEP, "yes");
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if (option_depth)
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transport_set_option(transport, TRANS_OPT_DEPTH,
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option_depth);
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if (option_quiet)
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transport->verbose = -1;
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refs = transport_get_remote_refs(transport);
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transport_fetch_refs(transport, refs);
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}
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clear_extra_refs();
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|
||||
mapped_refs = write_remote_refs(refs, &refspec, reflog_msg.buf);
|
||||
|
||||
head_points_at = locate_head(refs, mapped_refs, &remote_head);
|
||||
|
||||
if (head_points_at) {
|
||||
/* Local default branch link */
|
||||
create_symref("HEAD", head_points_at->name, NULL);
|
||||
|
||||
if (!option_bare) {
|
||||
struct strbuf head_ref;
|
||||
const char *head = head_points_at->name;
|
||||
|
||||
if (!prefixcmp(head, "refs/heads/"))
|
||||
head += 11;
|
||||
|
||||
/* Set up the initial local branch */
|
||||
|
||||
/* Local branch initial value */
|
||||
update_ref(reflog_msg.buf, "HEAD",
|
||||
head_points_at->old_sha1,
|
||||
NULL, 0, DIE_ON_ERR);
|
||||
|
||||
strbuf_init(&head_ref, 0);
|
||||
strbuf_addstr(&head_ref, branch_top);
|
||||
strbuf_addstr(&head_ref, "HEAD");
|
||||
|
||||
/* Remote branch link */
|
||||
create_symref(head_ref.buf,
|
||||
head_points_at->peer_ref->name,
|
||||
reflog_msg.buf);
|
||||
|
||||
snprintf(key, sizeof(key), "branch.%s.remote", head);
|
||||
git_config_set(key, option_origin);
|
||||
snprintf(key, sizeof(key), "branch.%s.merge", head);
|
||||
git_config_set(key, 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);
|
||||
} 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 (!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.verbose_update = !option_quiet;
|
||||
opts.dst_index = &the_index;
|
||||
|
||||
tree = parse_tree_indirect(remote_head->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");
|
||||
}
|
||||
|
||||
strbuf_release(&reflog_msg);
|
||||
junk_pid = 0;
|
||||
return 0;
|
||||
}
|
||||
@ -24,6 +24,7 @@ extern int cmd_check_attr(int argc, const char **argv, const char *prefix);
|
||||
extern int cmd_check_ref_format(int argc, const char **argv, const char *prefix);
|
||||
extern int cmd_cherry(int argc, const char **argv, const char *prefix);
|
||||
extern int cmd_cherry_pick(int argc, const char **argv, const char *prefix);
|
||||
extern int cmd_clone(int argc, const char **argv, const char *prefix);
|
||||
extern int cmd_clean(int argc, const char **argv, const char *prefix);
|
||||
extern int cmd_commit(int argc, const char **argv, const char *prefix);
|
||||
extern int cmd_commit_tree(int argc, const char **argv, const char *prefix);
|
||||
|
||||
1
git.c
1
git.c
@ -286,6 +286,7 @@ static void handle_internal_command(int argc, const char **argv)
|
||||
{ "check-attr", cmd_check_attr, RUN_SETUP | NEED_WORK_TREE },
|
||||
{ "cherry", cmd_cherry, RUN_SETUP },
|
||||
{ "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
|
||||
{ "clone", cmd_clone },
|
||||
{ "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE },
|
||||
{ "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
|
||||
{ "commit-tree", cmd_commit_tree, RUN_SETUP },
|
||||
|
||||
Loading…
Reference in New Issue
Block a user