# HG changeset patch
# User Timo Sirainen <tss@iki.fi>
# Date 1184449724 -10800
# Node ID 5b4bf289b98d94d33d1f7c99a1610e68f99f164e
# Parent  7a632ae07cea73ec14b725cba438b66818980412
If mail_index_ext_set_reset_id() is called, the transaction may go back to
unchanged state and we don't want to write it to transaction log then.

diff -r 7a632ae07cea -r 5b4bf289b98d src/lib-index/mail-index-transaction-private.h
--- a/src/lib-index/mail-index-transaction-private.h	Sun Jul 15 00:45:03 2007 +0300
+++ b/src/lib-index/mail-index-transaction-private.h	Sun Jul 15 00:48:44 2007 +0300
@@ -73,7 +73,10 @@
 	unsigned int pre_hdr_changed:1;
 	unsigned int post_hdr_changed:1;
 	unsigned int reset:1;
+	/* non-extension updates */
 	unsigned int log_updates:1;
+	/* extension updates */
+	unsigned int log_ext_updates:1;
 };
 
 extern void (*hook_mail_index_transaction_created)
diff -r 7a632ae07cea -r 5b4bf289b98d src/lib-index/mail-index-transaction.c
--- a/src/lib-index/mail-index-transaction.c	Sun Jul 15 00:45:03 2007 +0300
+++ b/src/lib-index/mail-index-transaction.c	Sun Jul 15 00:48:44 2007 +0300
@@ -87,6 +87,7 @@
 	t->post_hdr_changed = FALSE;
 	t->reset = FALSE;
 	t->log_updates = FALSE;
+	t->log_ext_updates = FALSE;
 }
 
 static void mail_index_transaction_free(struct mail_index_transaction *t)
@@ -830,7 +831,7 @@
 		 (old_record_size == record_size &&
 		  old_record_align == record_align));
 
-	t->log_updates = TRUE;
+	t->log_ext_updates = TRUE;
 
 	if (!array_is_created(&t->ext_resizes))
 		i_array_init(&t->ext_resizes, ext_id + 2);
@@ -847,13 +848,56 @@
 {
 	i_assert(reset_id != 0);
 
-	t->log_updates = TRUE;
-
 	mail_index_ext_set_reset_id(t, ext_id, reset_id);
 
 	if (!array_is_created(&t->ext_resets))
 		i_array_init(&t->ext_resets, ext_id + 2);
 	array_idx_set(&t->ext_resets, ext_id, &reset_id);
+	t->log_ext_updates = TRUE;
+}
+
+static bool
+mail_index_transaction_has_ext_changes(struct mail_index_transaction *t)
+{
+	unsigned int i, count;
+
+	if (array_is_created(&t->ext_rec_updates)) {
+		const ARRAY_TYPE(seq_array) *array;
+
+		array = array_get(&t->ext_rec_updates, &count);
+		for (i = 0; i < count; i++) {
+			if (array_is_created(&array[i]))
+				return TRUE;
+		}
+	}
+	if (array_is_created(&t->ext_hdr_updates)) {
+		struct mail_index_transaction_ext_hdr_update *const *hdr;
+
+		hdr = array_get(&t->ext_hdr_updates, &count);
+		for (i = 0; i < count; i++) {
+			if (hdr[i] != NULL)
+				return TRUE;
+		}
+	}
+	if (array_is_created(&t->ext_resets)) {
+		const uint32_t *ids;
+
+		ids = array_get(&t->ext_resets, &count);
+		for (i = 0; i < count; i++) {
+			if (ids[i] != 0)
+				return TRUE;
+		}
+	}
+	if (array_is_created(&t->ext_resizes)) {
+		const struct mail_transaction_ext_intro *resizes;
+
+		resizes = array_get(&t->ext_resizes, &count);
+		for (i = 0; i < count; i++) {
+			if (resizes[i].name_size > 0)
+				return TRUE;
+		}
+	}
+	return FALSE;
 }
 
 void mail_index_ext_set_reset_id(struct mail_index_transaction *t,
@@ -891,6 +935,8 @@
 	if (!array_is_created(&t->ext_reset_ids))
 		i_array_init(&t->ext_reset_ids, ext_id + 2);
 	array_idx_set(&t->ext_reset_ids, ext_id, &reset_id);
+
+	t->log_ext_updates = mail_index_transaction_has_ext_changes(t);
 }
 
 void mail_index_update_header_ext(struct mail_index_transaction *t,
@@ -915,7 +961,7 @@
 	}
 	*pos = hdr;
 
-	t->log_updates = TRUE;
+	t->log_ext_updates = TRUE;
 }
 
 void mail_index_update_ext(struct mail_index_transaction *t, uint32_t seq,
@@ -933,7 +979,7 @@
 		  seq <= t->last_new_seq));
 	i_assert(ext_id < array_count(&index->extensions));
 
-	t->log_updates = TRUE;
+	t->log_ext_updates = TRUE;
 
 	if (!array_is_created(&t->ext_resizes)) {
 		intro = NULL;
diff -r 7a632ae07cea -r 5b4bf289b98d src/lib-index/mail-transaction-log-append.c
--- a/src/lib-index/mail-transaction-log-append.c	Sun Jul 15 00:45:03 2007 +0300
+++ b/src/lib-index/mail-transaction-log-append.c	Sun Jul 15 00:48:44 2007 +0300
@@ -578,7 +578,7 @@
 	struct mail_index *index;
 	int ret;
 
-	if (!t->log_updates) {
+	if (!t->log_updates && !t->log_ext_updates) {
 		/* nothing to append */
 		*log_file_seq_r = 0;
 		*log_file_offset_r = 0;