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
committed by
Junio C Hamano
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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