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-rw-r--r--hook.c189
1 files changed, 189 insertions, 0 deletions
diff --git a/hook.c b/hook.c
new file mode 100644
index 0000000..f6306d7
--- /dev/null
+++ b/hook.c
@@ -0,0 +1,189 @@
+#include "git-compat-util.h"
+#include "abspath.h"
+#include "advice.h"
+#include "gettext.h"
+#include "hook.h"
+#include "path.h"
+#include "run-command.h"
+#include "config.h"
+#include "strbuf.h"
+
+const char *find_hook(const char *name)
+{
+ static struct strbuf path = STRBUF_INIT;
+
+ strbuf_reset(&path);
+ strbuf_git_path(&path, "hooks/%s", name);
+ if (access(path.buf, X_OK) < 0) {
+ int err = errno;
+
+#ifdef STRIP_EXTENSION
+ strbuf_addstr(&path, STRIP_EXTENSION);
+ if (access(path.buf, X_OK) >= 0)
+ return path.buf;
+ if (errno == EACCES)
+ err = errno;
+#endif
+
+ if (err == EACCES && advice_enabled(ADVICE_IGNORED_HOOK)) {
+ static struct string_list advise_given = STRING_LIST_INIT_DUP;
+
+ if (!string_list_lookup(&advise_given, name)) {
+ string_list_insert(&advise_given, name);
+ advise(_("The '%s' hook was ignored because "
+ "it's not set as executable.\n"
+ "You can disable this warning with "
+ "`git config advice.ignoredHook false`."),
+ path.buf);
+ }
+ }
+ return NULL;
+ }
+ return path.buf;
+}
+
+int hook_exists(const char *name)
+{
+ return !!find_hook(name);
+}
+
+static int pick_next_hook(struct child_process *cp,
+ struct strbuf *out UNUSED,
+ void *pp_cb,
+ void **pp_task_cb UNUSED)
+{
+ struct hook_cb_data *hook_cb = pp_cb;
+ const char *hook_path = hook_cb->hook_path;
+
+ if (!hook_path)
+ return 0;
+
+ cp->no_stdin = 1;
+ strvec_pushv(&cp->env, hook_cb->options->env.v);
+ /* reopen the file for stdin; run_command closes it. */
+ if (hook_cb->options->path_to_stdin) {
+ cp->no_stdin = 0;
+ cp->in = xopen(hook_cb->options->path_to_stdin, O_RDONLY);
+ }
+ cp->stdout_to_stderr = 1;
+ cp->trace2_hook_name = hook_cb->hook_name;
+ cp->dir = hook_cb->options->dir;
+
+ strvec_push(&cp->args, hook_path);
+ strvec_pushv(&cp->args, hook_cb->options->args.v);
+
+ /*
+ * This pick_next_hook() will be called again, we're only
+ * running one hook, so indicate that no more work will be
+ * done.
+ */
+ hook_cb->hook_path = NULL;
+
+ return 1;
+}
+
+static int notify_start_failure(struct strbuf *out UNUSED,
+ void *pp_cb,
+ void *pp_task_cp UNUSED)
+{
+ struct hook_cb_data *hook_cb = pp_cb;
+
+ hook_cb->rc |= 1;
+
+ return 1;
+}
+
+static int notify_hook_finished(int result,
+ struct strbuf *out UNUSED,
+ void *pp_cb,
+ void *pp_task_cb UNUSED)
+{
+ struct hook_cb_data *hook_cb = pp_cb;
+ struct run_hooks_opt *opt = hook_cb->options;
+
+ hook_cb->rc |= result;
+
+ if (opt->invoked_hook)
+ *opt->invoked_hook = 1;
+
+ return 0;
+}
+
+static void run_hooks_opt_clear(struct run_hooks_opt *options)
+{
+ strvec_clear(&options->env);
+ strvec_clear(&options->args);
+}
+
+int run_hooks_opt(const char *hook_name, struct run_hooks_opt *options)
+{
+ struct strbuf abs_path = STRBUF_INIT;
+ struct hook_cb_data cb_data = {
+ .rc = 0,
+ .hook_name = hook_name,
+ .options = options,
+ };
+ const char *const hook_path = find_hook(hook_name);
+ int ret = 0;
+ const struct run_process_parallel_opts opts = {
+ .tr2_category = "hook",
+ .tr2_label = hook_name,
+
+ .processes = 1,
+ .ungroup = 1,
+
+ .get_next_task = pick_next_hook,
+ .start_failure = notify_start_failure,
+ .task_finished = notify_hook_finished,
+
+ .data = &cb_data,
+ };
+
+ if (!options)
+ BUG("a struct run_hooks_opt must be provided to run_hooks");
+
+ if (options->invoked_hook)
+ *options->invoked_hook = 0;
+
+ if (!hook_path && !options->error_if_missing)
+ goto cleanup;
+
+ if (!hook_path) {
+ ret = error("cannot find a hook named %s", hook_name);
+ goto cleanup;
+ }
+
+ cb_data.hook_path = hook_path;
+ if (options->dir) {
+ strbuf_add_absolute_path(&abs_path, hook_path);
+ cb_data.hook_path = abs_path.buf;
+ }
+
+ run_processes_parallel(&opts);
+ ret = cb_data.rc;
+cleanup:
+ strbuf_release(&abs_path);
+ run_hooks_opt_clear(options);
+ return ret;
+}
+
+int run_hooks(const char *hook_name)
+{
+ struct run_hooks_opt opt = RUN_HOOKS_OPT_INIT;
+
+ return run_hooks_opt(hook_name, &opt);
+}
+
+int run_hooks_l(const char *hook_name, ...)
+{
+ struct run_hooks_opt opt = RUN_HOOKS_OPT_INIT;
+ va_list ap;
+ const char *arg;
+
+ va_start(ap, hook_name);
+ while ((arg = va_arg(ap, const char *)))
+ strvec_push(&opt.args, arg);
+ va_end(ap);
+
+ return run_hooks_opt(hook_name, &opt);
+}