[PATCH 1/3] cli: export function for illegal tag checking

[Jani Nikula]

This lets us check for forbidden tags consistently across the cli. No
functional changes.
---
 tag-util.c |  9 +--------
 tag-util.h | 12 ++++++++++++
 2 files changed, 13 insertions(+), 8 deletions(-)

diff --git a/tag-util.c b/tag-util.c
index 3bde4097372a..e2d5b795acc3 100644
--- a/tag-util.c
+++ b/tag-util.c
@@ -31,14 +31,7 @@ line_error (tag_parse_status_t status,
     return status;
 }
 
-/*
- * Test tags for some forbidden cases.
- *
- * return: NULL if OK,
- *	   explanatory message otherwise.
- */
-
-static const char *
+const char *
 illegal_tag (const char *tag, notmuch_bool_t remove)
 {
 
diff --git a/tag-util.h b/tag-util.h
index 4628f1630ad6..8a4074ce168f 100644
--- a/tag-util.h
+++ b/tag-util.h
@@ -90,6 +90,18 @@ parse_tag_command_line (void *ctx, int argc, char **argv,
 			char **query_str, tag_op_list_t *ops);
 
 /*
+ * Test tags for some forbidden cases.
+ *
+ * Relax the checks if 'remove' is true to allow removal of previously
+ * added forbidden tags.
+ *
+ * return: NULL if OK,
+ *	   explanatory message otherwise.
+ */
+const char *
+illegal_tag (const char *tag, notmuch_bool_t remove);
+
+/*
  * Create an empty list of tag operations
  *
  * ctx is passed to talloc
-- 
1.8.5.3