Add help option to "ftag file add"

1 files changed, 21 insertions, 3 deletions

diff --git a/src/main.c b/src/main.c
index 2ed6d89..52cbcb1 100644
--- a/src/main.c
+++ b/src/main.c
@@ -376,10 +376,25 @@ static void ftag_add_one_file(sqlite3 *db, int *next_id, const char *file)
 
 static void ftag_file_add_usage(void)
 {
-	fprintf(stderr, "Usage: ftag file add [-i] FILE...\n");
+	fprintf(stderr, "Usage: ftag file add [OPTION]... FILE...\n");
 }
 
-/* Add new files to the database. */
+static void ftag_file_add_help(void)
+{
+	printf("ftag file add: add files to the database.\n");
+	ftag_file_add_usage();
+	printf("Available options:\n");
+	printf("  -h  print help message\n");
+	printf("  -i  interactive, ask before adding each file to the database\n");
+	printf("Tips:\n");
+	printf("  For adding all files in a directory, use\n");
+	printf("  ftag file add dir/*\n");
+	printf("  For doing it recursively, use\n");
+	printf("  find dir -type f -print | xargs ftag file add");
+}
+
+/* Add new files to the database. If directories are given, every file in the
+ * directory will be added, does _not_ recurse into subdirectories. */
 static void ftag_file_add(int argc, char **argv)
 {
 	if (argc == 0) {
@@ -389,11 +404,14 @@ static void ftag_file_add(int argc, char **argv)
 	sqlite3 *db = NULL;
 	int interactive = 0;
 	int rc;
-	while (argv[0][0] == '-') {
+	while ((argc > 0) && (argv[0][0] == '-')) {
 		switch (argv[0][1]) {
 		case 'i':
 			interactive = 1;
 			break;
+		case 'h':
+			ftag_file_add_help();
+			exit(EXIT_SUCCESS);
 		default:
 			ftag_file_add_usage();
 			exit(EXIT_FAILURE);