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submodule: rewrite module_clone shell function in C
This reimplements the helper function `module_clone` in shell in C as `clone`. This functionality is needed for converting `git submodule update` later on, which we want to add threading to. Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Stefan Beller
Junio C Hamano
parent
0ea306ef17
commit
ee8838d157
@ -8,6 +8,7 @@
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#include "submodule.h"
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#include "submodule-config.h"
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#include "string-list.h"
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#include "run-command.h"
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struct module_list {
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const struct cache_entry **entries;
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@ -123,6 +124,136 @@ static int module_name(int argc, const char **argv, const char *prefix)
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return 0;
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}
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static int clone_submodule(const char *path, const char *gitdir, const char *url,
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const char *depth, const char *reference, int quiet)
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{
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struct child_process cp;
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child_process_init(&cp);
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argv_array_push(&cp.args, "clone");
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argv_array_push(&cp.args, "--no-checkout");
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if (quiet)
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argv_array_push(&cp.args, "--quiet");
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if (depth && *depth)
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argv_array_pushl(&cp.args, "--depth", depth, NULL);
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if (reference && *reference)
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argv_array_pushl(&cp.args, "--reference", reference, NULL);
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if (gitdir && *gitdir)
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argv_array_pushl(&cp.args, "--separate-git-dir", gitdir, NULL);
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argv_array_push(&cp.args, url);
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argv_array_push(&cp.args, path);
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cp.git_cmd = 1;
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cp.env = local_repo_env;
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cp.no_stdin = 1;
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return run_command(&cp);
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}
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static int module_clone(int argc, const char **argv, const char *prefix)
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{
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const char *path = NULL, *name = NULL, *url = NULL;
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const char *reference = NULL, *depth = NULL;
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int quiet = 0;
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FILE *submodule_dot_git;
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char *sm_gitdir, *cwd, *p;
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struct strbuf rel_path = STRBUF_INIT;
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struct strbuf sb = STRBUF_INIT;
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struct option module_clone_options[] = {
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OPT_STRING(0, "prefix", &prefix,
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N_("path"),
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N_("alternative anchor for relative paths")),
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OPT_STRING(0, "path", &path,
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N_("path"),
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N_("where the new submodule will be cloned to")),
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OPT_STRING(0, "name", &name,
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N_("string"),
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N_("name of the new submodule")),
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OPT_STRING(0, "url", &url,
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N_("string"),
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N_("url where to clone the submodule from")),
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OPT_STRING(0, "reference", &reference,
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N_("string"),
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N_("reference repository")),
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OPT_STRING(0, "depth", &depth,
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N_("string"),
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N_("depth for shallow clones")),
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OPT__QUIET(&quiet, "Suppress output for cloning a submodule"),
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OPT_END()
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};
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const char *const git_submodule_helper_usage[] = {
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N_("git submodule--helper clone [--prefix=<path>] [--quiet] "
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"[--reference <repository>] [--name <name>] [--url <url>]"
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"[--depth <depth>] [--] [<path>...]"),
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NULL
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};
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argc = parse_options(argc, argv, prefix, module_clone_options,
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git_submodule_helper_usage, 0);
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strbuf_addf(&sb, "%s/modules/%s", get_git_dir(), name);
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sm_gitdir = strbuf_detach(&sb, NULL);
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if (!file_exists(sm_gitdir)) {
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if (safe_create_leading_directories_const(sm_gitdir) < 0)
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die(_("could not create directory '%s'"), sm_gitdir);
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if (clone_submodule(path, sm_gitdir, url, depth, reference, quiet))
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die(_("clone of '%s' into submodule path '%s' failed"),
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url, path);
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} else {
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if (safe_create_leading_directories_const(path) < 0)
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die(_("could not create directory '%s'"), path);
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strbuf_addf(&sb, "%s/index", sm_gitdir);
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unlink_or_warn(sb.buf);
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strbuf_reset(&sb);
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}
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/* Write a .git file in the submodule to redirect to the superproject. */
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if (safe_create_leading_directories_const(path) < 0)
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die(_("could not create directory '%s'"), path);
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if (path && *path)
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strbuf_addf(&sb, "%s/.git", path);
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else
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strbuf_addstr(&sb, ".git");
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if (safe_create_leading_directories_const(sb.buf) < 0)
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die(_("could not create leading directories of '%s'"), sb.buf);
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submodule_dot_git = fopen(sb.buf, "w");
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if (!submodule_dot_git)
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die_errno(_("cannot open file '%s'"), sb.buf);
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fprintf(submodule_dot_git, "gitdir: %s\n",
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relative_path(sm_gitdir, path, &rel_path));
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if (fclose(submodule_dot_git))
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die(_("could not close file %s"), sb.buf);
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strbuf_reset(&sb);
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strbuf_reset(&rel_path);
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cwd = xgetcwd();
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/* Redirect the worktree of the submodule in the superproject's config */
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if (!is_absolute_path(sm_gitdir)) {
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strbuf_addf(&sb, "%s/%s", cwd, sm_gitdir);
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free(sm_gitdir);
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sm_gitdir = strbuf_detach(&sb, NULL);
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}
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strbuf_addf(&sb, "%s/%s", cwd, path);
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p = git_pathdup_submodule(path, "config");
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if (!p)
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die(_("could not get submodule directory for '%s'"), path);
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git_config_set_in_file(p, "core.worktree",
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relative_path(sb.buf, sm_gitdir, &rel_path));
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strbuf_release(&sb);
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strbuf_release(&rel_path);
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free(sm_gitdir);
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free(cwd);
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free(p);
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return 0;
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}
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struct cmd_struct {
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const char *cmd;
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@ -132,6 +263,7 @@ struct cmd_struct {
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static struct cmd_struct commands[] = {
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{"list", module_list},
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{"name", module_name},
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{"clone", module_clone},
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};
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int cmd_submodule__helper(int argc, const char **argv, const char *prefix)
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@ -178,80 +178,6 @@ get_submodule_config () {
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printf '%s' "${value:-$default}"
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}
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#
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# Clone a submodule
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#
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# $1 = submodule path
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# $2 = submodule name
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# $3 = URL to clone
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# $4 = reference repository to reuse (empty for independent)
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# $5 = depth argument for shallow clones (empty for deep)
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#
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# Prior to calling, cmd_update checks that a possibly existing
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# path is not a git repository.
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# Likewise, cmd_add checks that path does not exist at all,
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# since it is the location of a new submodule.
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#
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module_clone()
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{
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sm_path=$1
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name=$2
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url=$3
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reference="$4"
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depth="$5"
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quiet=
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if test -n "$GIT_QUIET"
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then
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quiet=-q
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fi
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gitdir=
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gitdir_base=
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base_name=$(dirname "$name")
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gitdir=$(git rev-parse --git-dir)
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gitdir_base="$gitdir/modules/$base_name"
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gitdir="$gitdir/modules/$name"
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if test -d "$gitdir"
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then
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mkdir -p "$sm_path"
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rm -f "$gitdir/index"
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else
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mkdir -p "$gitdir_base"
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(
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clear_local_git_env
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git clone $quiet ${depth:+"$depth"} -n ${reference:+"$reference"} \
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--separate-git-dir "$gitdir" "$url" "$sm_path"
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) ||
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die "$(eval_gettext "Clone of '\$url' into submodule path '\$sm_path' failed")"
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fi
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# We already are at the root of the work tree but cd_to_toplevel will
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# resolve any symlinks that might be present in $PWD
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a=$(cd_to_toplevel && cd "$gitdir" && pwd)/
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b=$(cd_to_toplevel && cd "$sm_path" && pwd)/
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# Remove all common leading directories after a sanity check
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if test "${a#$b}" != "$a" || test "${b#$a}" != "$b"; then
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die "$(eval_gettext "Gitdir '\$a' is part of the submodule path '\$b' or vice versa")"
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fi
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while test "${a%%/*}" = "${b%%/*}"
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do
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a=${a#*/}
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b=${b#*/}
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done
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# Now chop off the trailing '/'s that were added in the beginning
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a=${a%/}
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b=${b%/}
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# Turn each leading "*/" component into "../"
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rel=$(printf '%s\n' "$b" | sed -e 's|[^/][^/]*|..|g')
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printf '%s\n' "gitdir: $rel/$a" >"$sm_path/.git"
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rel=$(printf '%s\n' "$a" | sed -e 's|[^/][^/]*|..|g')
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(clear_local_git_env; cd "$sm_path" && GIT_WORK_TREE=. git config core.worktree "$rel/$b")
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}
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isnumber()
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{
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n=$(($1 + 0)) 2>/dev/null && test "$n" = "$1"
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@ -412,7 +338,7 @@ Use -f if you really want to add it." >&2
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echo "$(eval_gettext "Reactivating local git directory for submodule '\$sm_name'.")"
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fi
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fi
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module_clone "$sm_path" "$sm_name" "$realrepo" "$reference" "$depth" || exit
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git submodule--helper clone ${GIT_QUIET:+--quiet} --prefix "$wt_prefix" --path "$sm_path" --name "$sm_name" --url "$realrepo" "$reference" "$depth" || exit
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(
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clear_local_git_env
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cd "$sm_path" &&
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@ -774,7 +700,7 @@ Maybe you want to use 'update --init'?")"
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if ! test -d "$sm_path"/.git && ! test -f "$sm_path"/.git
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then
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module_clone "$sm_path" "$name" "$url" "$reference" "$depth" || exit
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git submodule--helper clone ${GIT_QUIET:+--quiet} --prefix "$prefix" --path "$sm_path" --name "$name" --url "$url" "$reference" "$depth" || exit
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cloned_modules="$cloned_modules;$name"
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subsha1=
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else
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