[PATCH v2 13/20] insert: add --create-folder option

[Peter Wang]

Support an option to create a new folder in the maildir.
---
 notmuch-insert.c | 92 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)

diff --git a/notmuch-insert.c b/notmuch-insert.c
index 81a528c..b7aef95 100644
--- a/notmuch-insert.c
+++ b/notmuch-insert.c
@@ -55,6 +55,91 @@ check_folder_name (const char *folder)
     }
 }
 
+/* Make the given directory but succeed if it already exists. */
+static int
+mkdir_exists_ok (const char *path, int mode)
+{
+    int ret;
+
+    ret = mkdir (path, mode);
+    if (ret == 0 || errno == EEXIST)
+	return 0;
+    else
+	return ret;
+}
+
+/* Make the given directory including its parent directory as necessary.
+ * Return 0 on success, -1 on error. */
+static int
+mkdir_parents (char *path, int mode)
+{
+    struct stat st;
+    char *start;
+    char *end;
+    int ret;
+
+    /* First check the common case: directory already exists. */
+    if (stat (path, &st) == 0)
+	return (S_ISDIR (st.st_mode)) ? 0 : -1;
+
+    for (start = path; *start != '\0'; start = end + 1) {
+	/* start points to the first unprocessed character.
+	 * Find the next slash from start onwards. */
+	end = strchr (start, '/');
+
+	/* If there are no more slashes then all the parent directories
+	 * have been made.  Now attempt to make the whole path. */
+	if (end == NULL)
+	    return mkdir_exists_ok (path, mode);
+
+	/* Make the path up to the next slash, unless the current
+	 * directory component is actually empty. */
+	if (end > start) {
+	    *end = '\0';
+	    ret = mkdir_exists_ok (path, mode);
+	    *end = '/';
+	    if (ret != 0)
+		return ret;
+	}
+    }
+
+    return 0;
+}
+
+/* Create the given maildir folder, i.e. dir and its subdirectories
+ * 'cur', 'new', 'tmp'. */
+static notmuch_bool_t
+maildir_create_folder (void *ctx, const char *dir)
+{
+    const int mode = 0700;
+    char *subdir;
+    char *tail;
+
+    /* Create 'cur' directory, including parent directories. */
+    subdir = talloc_asprintf (ctx, "%s/cur", dir);
+    if (! subdir) {
+	fprintf (stderr, "Out of memory.\n");
+	return FALSE;
+    }
+    if (mkdir_parents (subdir, mode) != 0)
+	return FALSE;
+
+    tail = subdir + strlen (subdir) - 3;
+
+    /* Create 'new' directory. */
+    strcpy (tail, "new");
+    if (mkdir_exists_ok (subdir, mode) != 0)
+	return FALSE;
+
+    /* Create 'tmp' directory. */
+    strcpy (tail, "tmp");
+    if (mkdir_exists_ok (subdir, mode) != 0)
+	return FALSE;
+
+    talloc_free (subdir);
+    return TRUE;
+}
+
 /* Open a unique file in the Maildir 'tmp' directory.
  * Returns the file descriptor on success, or -1 on failure.
  * On success, file paths into the 'tmp' and 'new' directories are returned
@@ -272,6 +357,7 @@ notmuch_insert_command (void *ctx, int argc, char *argv[])
     const char **new_tags;
     size_t new_tags_length;
     const char *folder = NULL;
+    notmuch_bool_t create_folder = FALSE;
     notmuch_tag_operation_t *tag_ops;
     int tag_ops_count;
     char *maildir;
@@ -280,6 +366,7 @@ notmuch_insert_command (void *ctx, int argc, char *argv[])
 
     notmuch_opt_desc_t options[] = {
 	{ NOTMUCH_OPT_STRING, &folder, "folder", 0, 0 },
+	{ NOTMUCH_OPT_BOOLEAN, &create_folder, "create-folder", 0, 0 },
 	{ NOTMUCH_OPT_END, 0, 0, 0, 0 }
     };
 
@@ -332,6 +419,11 @@ notmuch_insert_command (void *ctx, int argc, char *argv[])
 	fprintf (stderr, "Out of memory\n");
 	return 1;
     }
+    if (create_folder && ! maildir_create_folder (ctx, maildir)) {
+	fprintf (stderr, "Error: creating maildir %s: %s\n",
+		 maildir, strerror (errno));
+	return 1;
+    }
 
     if (notmuch_database_open (notmuch_config_get_database_path (config),
 			       NOTMUCH_DATABASE_MODE_READ_WRITE, &notmuch))
-- 
1.7.12.1