1 files changed, 42 insertions, 0 deletions
diff --git a/hook.c b/hook.c
new file mode 100644
index 0000000000..55e1145a4b
--- /dev/null
+++ b/hook.c
@@ -0,0 +1,42 @@
+#include "cache.h"
+#include "hook.h"
+#include "run-command.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);
+}