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-rw-r--r--contrib/scalar/scalar.c826
1 files changed, 826 insertions, 0 deletions
diff --git a/contrib/scalar/scalar.c b/contrib/scalar/scalar.c
new file mode 100644
index 0000000000..1ce9c2b00e
--- /dev/null
+++ b/contrib/scalar/scalar.c
@@ -0,0 +1,826 @@
+/*
+ * The Scalar command-line interface.
+ */
+
+#include "cache.h"
+#include "gettext.h"
+#include "parse-options.h"
+#include "config.h"
+#include "run-command.h"
+#include "refs.h"
+#include "dir.h"
+#include "packfile.h"
+#include "help.h"
+
+/*
+ * Remove the deepest subdirectory in the provided path string. Path must not
+ * include a trailing path separator. Returns 1 if parent directory found,
+ * otherwise 0.
+ */
+static int strbuf_parent_directory(struct strbuf *buf)
+{
+ size_t len = buf->len;
+ size_t offset = offset_1st_component(buf->buf);
+ char *path_sep = find_last_dir_sep(buf->buf + offset);
+ strbuf_setlen(buf, path_sep ? path_sep - buf->buf : offset);
+
+ return buf->len < len;
+}
+
+static void setup_enlistment_directory(int argc, const char **argv,
+ const char * const *usagestr,
+ const struct option *options,
+ struct strbuf *enlistment_root)
+{
+ struct strbuf path = STRBUF_INIT;
+ char *root;
+ int enlistment_found = 0;
+
+ if (startup_info->have_repository)
+ BUG("gitdir already set up?!?");
+
+ if (argc > 1)
+ usage_with_options(usagestr, options);
+
+ /* find the worktree, determine its corresponding root */
+ if (argc == 1)
+ strbuf_add_absolute_path(&path, argv[0]);
+ else if (strbuf_getcwd(&path) < 0)
+ die(_("need a working directory"));
+
+ strbuf_trim_trailing_dir_sep(&path);
+ do {
+ const size_t len = path.len;
+
+ /* check if currently in enlistment root with src/ workdir */
+ strbuf_addstr(&path, "/src");
+ if (is_nonbare_repository_dir(&path)) {
+ if (enlistment_root)
+ strbuf_add(enlistment_root, path.buf, len);
+
+ enlistment_found = 1;
+ break;
+ }
+
+ /* reset to original path */
+ strbuf_setlen(&path, len);
+
+ /* check if currently in workdir */
+ if (is_nonbare_repository_dir(&path)) {
+ if (enlistment_root) {
+ /*
+ * If the worktree's directory's name is `src`, the enlistment is the
+ * parent directory, otherwise it is identical to the worktree.
+ */
+ root = strip_path_suffix(path.buf, "src");
+ strbuf_addstr(enlistment_root, root ? root : path.buf);
+ free(root);
+ }
+
+ enlistment_found = 1;
+ break;
+ }
+ } while (strbuf_parent_directory(&path));
+
+ if (!enlistment_found)
+ die(_("could not find enlistment root"));
+
+ if (chdir(path.buf) < 0)
+ die_errno(_("could not switch to '%s'"), path.buf);
+
+ strbuf_release(&path);
+ setup_git_directory();
+}
+
+static int run_git(const char *arg, ...)
+{
+ struct strvec argv = STRVEC_INIT;
+ va_list args;
+ const char *p;
+ int res;
+
+ va_start(args, arg);
+ strvec_push(&argv, arg);
+ while ((p = va_arg(args, const char *)))
+ strvec_push(&argv, p);
+ va_end(args);
+
+ res = run_command_v_opt(argv.v, RUN_GIT_CMD);
+
+ strvec_clear(&argv);
+ return res;
+}
+
+static int set_recommended_config(int reconfigure)
+{
+ struct {
+ const char *key;
+ const char *value;
+ int overwrite_on_reconfigure;
+ } config[] = {
+ /* Required */
+ { "am.keepCR", "true", 1 },
+ { "core.FSCache", "true", 1 },
+ { "core.multiPackIndex", "true", 1 },
+ { "core.preloadIndex", "true", 1 },
+#ifndef WIN32
+ { "core.untrackedCache", "true", 1 },
+#else
+ /*
+ * Unfortunately, Scalar's Functional Tests demonstrated
+ * that the untracked cache feature is unreliable on Windows
+ * (which is a bummer because that platform would benefit the
+ * most from it). For some reason, freshly created files seem
+ * not to update the directory's `lastModified` time
+ * immediately, but the untracked cache would need to rely on
+ * that.
+ *
+ * Therefore, with a sad heart, we disable this very useful
+ * feature on Windows.
+ */
+ { "core.untrackedCache", "false", 1 },
+#endif
+ { "core.logAllRefUpdates", "true", 1 },
+ { "credential.https://dev.azure.com.useHttpPath", "true", 1 },
+ { "credential.validate", "false", 1 }, /* GCM4W-only */
+ { "gc.auto", "0", 1 },
+ { "gui.GCWarning", "false", 1 },
+ { "index.threads", "true", 1 },
+ { "index.version", "4", 1 },
+ { "merge.stat", "false", 1 },
+ { "merge.renames", "true", 1 },
+ { "pack.useBitmaps", "false", 1 },
+ { "pack.useSparse", "true", 1 },
+ { "receive.autoGC", "false", 1 },
+ { "reset.quiet", "true", 1 },
+ { "feature.manyFiles", "false", 1 },
+ { "feature.experimental", "false", 1 },
+ { "fetch.unpackLimit", "1", 1 },
+ { "fetch.writeCommitGraph", "false", 1 },
+#ifdef WIN32
+ { "http.sslBackend", "schannel", 1 },
+#endif
+ /* Optional */
+ { "status.aheadBehind", "false" },
+ { "commitGraph.generationVersion", "1" },
+ { "core.autoCRLF", "false" },
+ { "core.safeCRLF", "false" },
+ { "fetch.showForcedUpdates", "false" },
+ { NULL, NULL },
+ };
+ int i;
+ char *value;
+
+ for (i = 0; config[i].key; i++) {
+ if ((reconfigure && config[i].overwrite_on_reconfigure) ||
+ git_config_get_string(config[i].key, &value)) {
+ trace2_data_string("scalar", the_repository, config[i].key, "created");
+ if (git_config_set_gently(config[i].key,
+ config[i].value) < 0)
+ return error(_("could not configure %s=%s"),
+ config[i].key, config[i].value);
+ } else {
+ trace2_data_string("scalar", the_repository, config[i].key, "exists");
+ free(value);
+ }
+ }
+
+ /*
+ * The `log.excludeDecoration` setting is special because it allows
+ * for multiple values.
+ */
+ if (git_config_get_string("log.excludeDecoration", &value)) {
+ trace2_data_string("scalar", the_repository,
+ "log.excludeDecoration", "created");
+ if (git_config_set_multivar_gently("log.excludeDecoration",
+ "refs/prefetch/*",
+ CONFIG_REGEX_NONE, 0))
+ return error(_("could not configure "
+ "log.excludeDecoration"));
+ } else {
+ trace2_data_string("scalar", the_repository,
+ "log.excludeDecoration", "exists");
+ free(value);
+ }
+
+ return 0;
+}
+
+static int toggle_maintenance(int enable)
+{
+ return run_git("maintenance", enable ? "start" : "unregister", NULL);
+}
+
+static int add_or_remove_enlistment(int add)
+{
+ int res;
+
+ if (!the_repository->worktree)
+ die(_("Scalar enlistments require a worktree"));
+
+ res = run_git("config", "--global", "--get", "--fixed-value",
+ "scalar.repo", the_repository->worktree, NULL);
+
+ /*
+ * If we want to add and the setting is already there, then do nothing.
+ * If we want to remove and the setting is not there, then do nothing.
+ */
+ if ((add && !res) || (!add && res))
+ return 0;
+
+ return run_git("config", "--global", add ? "--add" : "--unset",
+ add ? "--no-fixed-value" : "--fixed-value",
+ "scalar.repo", the_repository->worktree, NULL);
+}
+
+static int register_dir(void)
+{
+ int res = add_or_remove_enlistment(1);
+
+ if (!res)
+ res = set_recommended_config(0);
+
+ if (!res)
+ res = toggle_maintenance(1);
+
+ return res;
+}
+
+static int unregister_dir(void)
+{
+ int res = 0;
+
+ if (toggle_maintenance(0) < 0)
+ res = -1;
+
+ if (add_or_remove_enlistment(0) < 0)
+ res = -1;
+
+ return res;
+}
+
+/* printf-style interface, expects `<key>=<value>` argument */
+static int set_config(const char *fmt, ...)
+{
+ struct strbuf buf = STRBUF_INIT;
+ char *value;
+ int res;
+ va_list args;
+
+ va_start(args, fmt);
+ strbuf_vaddf(&buf, fmt, args);
+ va_end(args);
+
+ value = strchr(buf.buf, '=');
+ if (value)
+ *(value++) = '\0';
+ res = git_config_set_gently(buf.buf, value);
+ strbuf_release(&buf);
+
+ return res;
+}
+
+static char *remote_default_branch(const char *url)
+{
+ struct child_process cp = CHILD_PROCESS_INIT;
+ struct strbuf out = STRBUF_INIT;
+
+ cp.git_cmd = 1;
+ strvec_pushl(&cp.args, "ls-remote", "--symref", url, "HEAD", NULL);
+ if (!pipe_command(&cp, NULL, 0, &out, 0, NULL, 0)) {
+ const char *line = out.buf;
+
+ while (*line) {
+ const char *eol = strchrnul(line, '\n'), *p;
+ size_t len = eol - line;
+ char *branch;
+
+ if (!skip_prefix(line, "ref: ", &p) ||
+ !strip_suffix_mem(line, &len, "\tHEAD")) {
+ line = eol + (*eol == '\n');
+ continue;
+ }
+
+ eol = line + len;
+ if (skip_prefix(p, "refs/heads/", &p)) {
+ branch = xstrndup(p, eol - p);
+ strbuf_release(&out);
+ return branch;
+ }
+
+ error(_("remote HEAD is not a branch: '%.*s'"),
+ (int)(eol - p), p);
+ strbuf_release(&out);
+ return NULL;
+ }
+ }
+ warning(_("failed to get default branch name from remote; "
+ "using local default"));
+ strbuf_reset(&out);
+
+ child_process_init(&cp);
+ cp.git_cmd = 1;
+ strvec_pushl(&cp.args, "symbolic-ref", "--short", "HEAD", NULL);
+ if (!pipe_command(&cp, NULL, 0, &out, 0, NULL, 0)) {
+ strbuf_trim(&out);
+ return strbuf_detach(&out, NULL);
+ }
+
+ strbuf_release(&out);
+ error(_("failed to get default branch name"));
+ return NULL;
+}
+
+static int delete_enlistment(struct strbuf *enlistment)
+{
+#ifdef WIN32
+ struct strbuf parent = STRBUF_INIT;
+#endif
+
+ if (unregister_dir())
+ die(_("failed to unregister repository"));
+
+#ifdef WIN32
+ /*
+ * Change the current directory to one outside of the enlistment so
+ * that we may delete everything underneath it.
+ */
+ strbuf_addbuf(&parent, enlistment);
+ strbuf_parent_directory(&parent);
+ if (chdir(parent.buf) < 0)
+ die_errno(_("could not switch to '%s'"), parent.buf);
+ strbuf_release(&parent);
+#endif
+
+ if (remove_dir_recursively(enlistment, 0))
+ die(_("failed to delete enlistment directory"));
+
+ return 0;
+}
+
+/*
+ * Dummy implementation; Using `get_version_info()` would cause a link error
+ * without this.
+ */
+void load_builtin_commands(const char *prefix, struct cmdnames *cmds)
+{
+ die("not implemented");
+}
+
+static int cmd_clone(int argc, const char **argv)
+{
+ const char *branch = NULL;
+ int full_clone = 0, single_branch = 0;
+ struct option clone_options[] = {
+ OPT_STRING('b', "branch", &branch, N_("<branch>"),
+ N_("branch to checkout after clone")),
+ OPT_BOOL(0, "full-clone", &full_clone,
+ N_("when cloning, create full working directory")),
+ OPT_BOOL(0, "single-branch", &single_branch,
+ N_("only download metadata for the branch that will "
+ "be checked out")),
+ OPT_END(),
+ };
+ const char * const clone_usage[] = {
+ N_("scalar clone [<options>] [--] <repo> [<dir>]"),
+ NULL
+ };
+ const char *url;
+ char *enlistment = NULL, *dir = NULL;
+ struct strbuf buf = STRBUF_INIT;
+ int res;
+
+ argc = parse_options(argc, argv, NULL, clone_options, clone_usage, 0);
+
+ if (argc == 2) {
+ url = argv[0];
+ enlistment = xstrdup(argv[1]);
+ } else if (argc == 1) {
+ url = argv[0];
+
+ strbuf_addstr(&buf, url);
+ /* Strip trailing slashes, if any */
+ while (buf.len > 0 && is_dir_sep(buf.buf[buf.len - 1]))
+ strbuf_setlen(&buf, buf.len - 1);
+ /* Strip suffix `.git`, if any */
+ strbuf_strip_suffix(&buf, ".git");
+
+ enlistment = find_last_dir_sep(buf.buf);
+ if (!enlistment) {
+ die(_("cannot deduce worktree name from '%s'"), url);
+ }
+ enlistment = xstrdup(enlistment + 1);
+ } else {
+ usage_msg_opt(_("You must specify a repository to clone."),
+ clone_usage, clone_options);
+ }
+
+ if (is_directory(enlistment))
+ die(_("directory '%s' exists already"), enlistment);
+
+ dir = xstrfmt("%s/src", enlistment);
+
+ strbuf_reset(&buf);
+ if (branch)
+ strbuf_addf(&buf, "init.defaultBranch=%s", branch);
+ else {
+ char *b = repo_default_branch_name(the_repository, 1);
+ strbuf_addf(&buf, "init.defaultBranch=%s", b);
+ free(b);
+ }
+
+ if ((res = run_git("-c", buf.buf, "init", "--", dir, NULL)))
+ goto cleanup;
+
+ if (chdir(dir) < 0) {
+ res = error_errno(_("could not switch to '%s'"), dir);
+ goto cleanup;
+ }
+
+ setup_git_directory();
+
+ /* common-main already logs `argv` */
+ trace2_def_repo(the_repository);
+
+ if (!branch && !(branch = remote_default_branch(url))) {
+ res = error(_("failed to get default branch for '%s'"), url);
+ goto cleanup;
+ }
+
+ if (set_config("remote.origin.url=%s", url) ||
+ set_config("remote.origin.fetch="
+ "+refs/heads/%s:refs/remotes/origin/%s",
+ single_branch ? branch : "*",
+ single_branch ? branch : "*") ||
+ set_config("remote.origin.promisor=true") ||
+ set_config("remote.origin.partialCloneFilter=blob:none")) {
+ res = error(_("could not configure remote in '%s'"), dir);
+ goto cleanup;
+ }
+
+ if (!full_clone &&
+ (res = run_git("sparse-checkout", "init", "--cone", NULL)))
+ goto cleanup;
+
+ if (set_recommended_config(0))
+ return error(_("could not configure '%s'"), dir);
+
+ if ((res = run_git("fetch", "--quiet", "origin", NULL))) {
+ warning(_("partial clone failed; attempting full clone"));
+
+ if (set_config("remote.origin.promisor") ||
+ set_config("remote.origin.partialCloneFilter")) {
+ res = error(_("could not configure for full clone"));
+ goto cleanup;
+ }
+
+ if ((res = run_git("fetch", "--quiet", "origin", NULL)))
+ goto cleanup;
+ }
+
+ if ((res = set_config("branch.%s.remote=origin", branch)))
+ goto cleanup;
+ if ((res = set_config("branch.%s.merge=refs/heads/%s",
+ branch, branch)))
+ goto cleanup;
+
+ strbuf_reset(&buf);
+ strbuf_addf(&buf, "origin/%s", branch);
+ res = run_git("checkout", "-f", "-t", buf.buf, NULL);
+ if (res)
+ goto cleanup;
+
+ res = register_dir();
+
+cleanup:
+ free(enlistment);
+ free(dir);
+ strbuf_release(&buf);
+ return res;
+}
+
+static int cmd_list(int argc, const char **argv)
+{
+ if (argc != 1)
+ die(_("`scalar list` does not take arguments"));
+
+ if (run_git("config", "--global", "--get-all", "scalar.repo", NULL) < 0)
+ return -1;
+ return 0;
+}
+
+static int cmd_register(int argc, const char **argv)
+{
+ struct option options[] = {
+ OPT_END(),
+ };
+ const char * const usage[] = {
+ N_("scalar register [<enlistment>]"),
+ NULL
+ };
+
+ argc = parse_options(argc, argv, NULL, options,
+ usage, 0);
+
+ setup_enlistment_directory(argc, argv, usage, options, NULL);
+
+ return register_dir();
+}
+
+static int get_scalar_repos(const char *key, const char *value, void *data)
+{
+ struct string_list *list = data;
+
+ if (!strcmp(key, "scalar.repo"))
+ string_list_append(list, value);
+
+ return 0;
+}
+
+static int cmd_reconfigure(int argc, const char **argv)
+{
+ int all = 0;
+ struct option options[] = {
+ OPT_BOOL('a', "all", &all,
+ N_("reconfigure all registered enlistments")),
+ OPT_END(),
+ };
+ const char * const usage[] = {
+ N_("scalar reconfigure [--all | <enlistment>]"),
+ NULL
+ };
+ struct string_list scalar_repos = STRING_LIST_INIT_DUP;
+ int i, res = 0;
+ struct repository r = { NULL };
+ struct strbuf commondir = STRBUF_INIT, gitdir = STRBUF_INIT;
+
+ argc = parse_options(argc, argv, NULL, options,
+ usage, 0);
+
+ if (!all) {
+ setup_enlistment_directory(argc, argv, usage, options, NULL);
+
+ return set_recommended_config(1);
+ }
+
+ if (argc > 0)
+ usage_msg_opt(_("--all or <enlistment>, but not both"),
+ usage, options);
+
+ git_config(get_scalar_repos, &scalar_repos);
+
+ for (i = 0; i < scalar_repos.nr; i++) {
+ const char *dir = scalar_repos.items[i].string;
+
+ strbuf_reset(&commondir);
+ strbuf_reset(&gitdir);
+
+ if (chdir(dir) < 0) {
+ warning_errno(_("could not switch to '%s'"), dir);
+ res = -1;
+ } else if (discover_git_directory(&commondir, &gitdir) < 0) {
+ warning_errno(_("git repository gone in '%s'"), dir);
+ res = -1;
+ } else {
+ git_config_clear();
+
+ the_repository = &r;
+ r.commondir = commondir.buf;
+ r.gitdir = gitdir.buf;
+
+ if (set_recommended_config(1) < 0)
+ res = -1;
+ }
+ }
+
+ string_list_clear(&scalar_repos, 1);
+ strbuf_release(&commondir);
+ strbuf_release(&gitdir);
+
+ return res;
+}
+
+static int cmd_run(int argc, const char **argv)
+{
+ struct option options[] = {
+ OPT_END(),
+ };
+ struct {
+ const char *arg, *task;
+ } tasks[] = {
+ { "config", NULL },
+ { "commit-graph", "commit-graph" },
+ { "fetch", "prefetch" },
+ { "loose-objects", "loose-objects" },
+ { "pack-files", "incremental-repack" },
+ { NULL, NULL }
+ };
+ struct strbuf buf = STRBUF_INIT;
+ const char *usagestr[] = { NULL, NULL };
+ int i;
+
+ strbuf_addstr(&buf, N_("scalar run <task> [<enlistment>]\nTasks:\n"));
+ for (i = 0; tasks[i].arg; i++)
+ strbuf_addf(&buf, "\t%s\n", tasks[i].arg);
+ usagestr[0] = buf.buf;
+
+ argc = parse_options(argc, argv, NULL, options,
+ usagestr, 0);
+
+ if (!argc)
+ usage_with_options(usagestr, options);
+
+ if (!strcmp("all", argv[0])) {
+ i = -1;
+ } else {
+ for (i = 0; tasks[i].arg && strcmp(tasks[i].arg, argv[0]); i++)
+ ; /* keep looking for the task */
+
+ if (i > 0 && !tasks[i].arg) {
+ error(_("no such task: '%s'"), argv[0]);
+ usage_with_options(usagestr, options);
+ }
+ }
+
+ argc--;
+ argv++;
+ setup_enlistment_directory(argc, argv, usagestr, options, NULL);
+ strbuf_release(&buf);
+
+ if (i == 0)
+ return register_dir();
+
+ if (i > 0)
+ return run_git("maintenance", "run",
+ "--task", tasks[i].task, NULL);
+
+ if (register_dir())
+ return -1;
+ for (i = 1; tasks[i].arg; i++)
+ if (run_git("maintenance", "run",
+ "--task", tasks[i].task, NULL))
+ return -1;
+ return 0;
+}
+
+static int remove_deleted_enlistment(struct strbuf *path)
+{
+ int res = 0;
+ strbuf_realpath_forgiving(path, path->buf, 1);
+
+ if (run_git("config", "--global",
+ "--unset", "--fixed-value",
+ "scalar.repo", path->buf, NULL) < 0)
+ res = -1;
+
+ if (run_git("config", "--global",
+ "--unset", "--fixed-value",
+ "maintenance.repo", path->buf, NULL) < 0)
+ res = -1;
+
+ return res;
+}
+
+static int cmd_unregister(int argc, const char **argv)
+{
+ struct option options[] = {
+ OPT_END(),
+ };
+ const char * const usage[] = {
+ N_("scalar unregister [<enlistment>]"),
+ NULL
+ };
+
+ argc = parse_options(argc, argv, NULL, options,
+ usage, 0);
+
+ /*
+ * Be forgiving when the enlistment or worktree does not even exist any
+ * longer; This can be the case if a user deleted the worktree by
+ * mistake and _still_ wants to unregister the thing.
+ */
+ if (argc == 1) {
+ struct strbuf src_path = STRBUF_INIT, workdir_path = STRBUF_INIT;
+
+ strbuf_addf(&src_path, "%s/src/.git", argv[0]);
+ strbuf_addf(&workdir_path, "%s/.git", argv[0]);
+ if (!is_directory(src_path.buf) && !is_directory(workdir_path.buf)) {
+ /* remove possible matching registrations */
+ int res = -1;
+
+ strbuf_strip_suffix(&src_path, "/.git");
+ res = remove_deleted_enlistment(&src_path) && res;
+
+ strbuf_strip_suffix(&workdir_path, "/.git");
+ res = remove_deleted_enlistment(&workdir_path) && res;
+
+ strbuf_release(&src_path);
+ strbuf_release(&workdir_path);
+ return res;
+ }
+ strbuf_release(&src_path);
+ strbuf_release(&workdir_path);
+ }
+
+ setup_enlistment_directory(argc, argv, usage, options, NULL);
+
+ return unregister_dir();
+}
+
+static int cmd_delete(int argc, const char **argv)
+{
+ char *cwd = xgetcwd();
+ struct option options[] = {
+ OPT_END(),
+ };
+ const char * const usage[] = {
+ N_("scalar delete <enlistment>"),
+ NULL
+ };
+ struct strbuf enlistment = STRBUF_INIT;
+ int res = 0;
+
+ argc = parse_options(argc, argv, NULL, options,
+ usage, 0);
+
+ if (argc != 1)
+ usage_with_options(usage, options);
+
+ setup_enlistment_directory(argc, argv, usage, options, &enlistment);
+
+ if (dir_inside_of(cwd, enlistment.buf) >= 0)
+ res = error(_("refusing to delete current working directory"));
+ else {
+ close_object_store(the_repository->objects);
+ res = delete_enlistment(&enlistment);
+ }
+ strbuf_release(&enlistment);
+ free(cwd);
+
+ return res;
+}
+
+static int cmd_version(int argc, const char **argv)
+{
+ int verbose = 0, build_options = 0;
+ struct option options[] = {
+ OPT__VERBOSE(&verbose, N_("include Git version")),
+ OPT_BOOL(0, "build-options", &build_options,
+ N_("include Git's build options")),
+ OPT_END(),
+ };
+ const char * const usage[] = {
+ N_("scalar verbose [-v | --verbose] [--build-options]"),
+ NULL
+ };
+ struct strbuf buf = STRBUF_INIT;
+
+ argc = parse_options(argc, argv, NULL, options,
+ usage, 0);
+
+ if (argc != 0)
+ usage_with_options(usage, options);
+
+ get_version_info(&buf, build_options);
+ fprintf(stderr, "%s\n", buf.buf);
+ strbuf_release(&buf);
+
+ return 0;
+}
+
+static struct {
+ const char *name;
+ int (*fn)(int, const char **);
+} builtins[] = {
+ { "clone", cmd_clone },
+ { "list", cmd_list },
+ { "register", cmd_register },
+ { "unregister", cmd_unregister },
+ { "run", cmd_run },
+ { "reconfigure", cmd_reconfigure },
+ { "delete", cmd_delete },
+ { "version", cmd_version },
+ { NULL, NULL},
+};
+
+int cmd_main(int argc, const char **argv)
+{
+ struct strbuf scalar_usage = STRBUF_INIT;
+ int i;
+
+ if (argc > 1) {
+ argv++;
+ argc--;
+
+ for (i = 0; builtins[i].name; i++)
+ if (!strcmp(builtins[i].name, argv[0]))
+ return !!builtins[i].fn(argc, argv);
+ }
+
+ strbuf_addstr(&scalar_usage,
+ N_("scalar <command> [<options>]\n\nCommands:\n"));
+ for (i = 0; builtins[i].name; i++)
+ strbuf_addf(&scalar_usage, "\t%s\n", builtins[i].name);
+
+ usage(scalar_usage.buf);
+}