[WIP2 12/12] cli: add global option "--db-revision"

[David Bremner <david@tethera.net>]

The function notmuch_exit_if_unmatched_db_revision is split from
notmuch_process_shared_options because it needs an open notmuch
database.
---
 notmuch-client.h  |  5 +++++
 notmuch-compact.c |  4 ++++
 notmuch-config.c  |  4 ++++
 notmuch-count.c   |  2 ++
 notmuch-dump.c    |  2 ++
 notmuch-insert.c  |  2 ++
 notmuch-new.c     |  3 ++-
 notmuch-reply.c   |  2 ++
 notmuch-restore.c |  2 ++
 notmuch-search.c  |  2 ++
 notmuch-setup.c   |  4 ++++
 notmuch-show.c    |  2 ++
 notmuch-tag.c     |  2 ++
 notmuch.c         | 18 ++++++++++++++++++
 14 files changed, 53 insertions(+), 1 deletion(-)

diff --git a/notmuch-client.h b/notmuch-client.h
index 76dbc38..24aa78a 100644
--- a/notmuch-client.h
+++ b/notmuch-client.h
@@ -466,6 +466,11 @@ notmuch_database_dump (notmuch_database_t *notmuch,
 		       notmuch_bool_t gzip_output);
 
 #include "command-line-arguments.h"
+
+extern char *notmuch_requested_db_revision;
 extern const notmuch_opt_desc_t  notmuch_shared_options [];
 void notmuch_process_shared_options (const char* help_name);
+
+void notmuch_exit_if_unmatched_db_revision (notmuch_database_t *notmuch);
+
 #endif
diff --git a/notmuch-compact.c b/notmuch-compact.c
index 5be551d..3da4bfb 100644
--- a/notmuch-compact.c
+++ b/notmuch-compact.c
@@ -46,6 +46,10 @@ notmuch_compact_command (notmuch_config_t *config, int argc, char *argv[])
     if (opt_index < 0)
 	return EXIT_FAILURE;
 
+    if (notmuch_requested_db_revision)
+	fprintf (stderr, "Warning: ignoring --db-revision=%s\n",
+		 notmuch_requested_db_revision);
+
     notmuch_process_shared_options (argv[0]);
 
     if (! quiet)
diff --git a/notmuch-config.c b/notmuch-config.c
index 568b3dc..a9d4e73 100644
--- a/notmuch-config.c
+++ b/notmuch-config.c
@@ -883,6 +883,10 @@ notmuch_config_command (notmuch_config_t *config, int argc, char *argv[])
     if (opt_index < 0)
 	return EXIT_FAILURE;
 
+    if (notmuch_requested_db_revision)
+	fprintf (stderr, "Warning: ignoring --db-revision=%s\n",
+		 notmuch_requested_db_revision);
+
     notmuch_process_shared_options (argv[0]);
 
     /* skip subcommand argument */
diff --git a/notmuch-count.c b/notmuch-count.c
index 57a88a8..e29ac2b 100644
--- a/notmuch-count.c
+++ b/notmuch-count.c
@@ -175,6 +175,8 @@ notmuch_count_command (notmuch_config_t *config, int argc, char *argv[])
 			       NOTMUCH_DATABASE_MODE_READ_ONLY, &notmuch))
 	return EXIT_FAILURE;
 
+    notmuch_exit_if_unmatched_db_revision (notmuch);
+
     query_str = query_string_from_args (config, argc-opt_index, argv+opt_index);
     if (query_str == NULL) {
 	fprintf (stderr, "Out of memory.\n");
diff --git a/notmuch-dump.c b/notmuch-dump.c
index fab22bd..9c0b82d 100644
--- a/notmuch-dump.c
+++ b/notmuch-dump.c
@@ -215,6 +215,8 @@ notmuch_dump_command (notmuch_config_t *config, int argc, char *argv[])
 			       NOTMUCH_DATABASE_MODE_READ_WRITE, &notmuch))
 	return EXIT_FAILURE;
 
+    notmuch_exit_if_unmatched_db_revision (notmuch);
+
     char *output_file_name = NULL;
     int opt_index;
 
diff --git a/notmuch-insert.c b/notmuch-insert.c
index 697880f..63b7a48 100644
--- a/notmuch-insert.c
+++ b/notmuch-insert.c
@@ -536,6 +536,8 @@ notmuch_insert_command (notmuch_config_t *config, int argc, char *argv[])
 			       NOTMUCH_DATABASE_MODE_READ_WRITE, &notmuch))
 	return EXIT_FAILURE;
 
+    notmuch_exit_if_unmatched_db_revision (notmuch);
+
     /* Write the message to the Maildir new directory. */
     newpath = maildir_write_new (config, STDIN_FILENO, maildir);
     if (! newpath) {
diff --git a/notmuch-new.c b/notmuch-new.c
index 895f5d9..e494a3b 100644
--- a/notmuch-new.c
+++ b/notmuch-new.c
@@ -995,10 +995,11 @@ notmuch_new_command (notmuch_config_t *config, int argc, char *argv[])
 		fputs (status_string, stderr);
 		free (status_string);
 	    }
-
 	    return EXIT_FAILURE;
 	}
 
+	notmuch_exit_if_unmatched_db_revision (notmuch);
+
 	if (notmuch_database_needs_upgrade (notmuch)) {
 	    time_t now = time (NULL);
 	    struct tm *gm_time = gmtime (&now);
diff --git a/notmuch-reply.c b/notmuch-reply.c
index 4464741..52e0d9b 100644
--- a/notmuch-reply.c
+++ b/notmuch-reply.c
@@ -831,6 +831,8 @@ notmuch_reply_command (notmuch_config_t *config, int argc, char *argv[])
 			       NOTMUCH_DATABASE_MODE_READ_ONLY, &notmuch))
 	return EXIT_FAILURE;
 
+    notmuch_exit_if_unmatched_db_revision (notmuch);
+
     query = notmuch_query_create (notmuch, query_string);
     if (query == NULL) {
 	fprintf (stderr, "Out of memory\n");
diff --git a/notmuch-restore.c b/notmuch-restore.c
index 2a534dc..3e96aa8 100644
--- a/notmuch-restore.c
+++ b/notmuch-restore.c
@@ -165,6 +165,8 @@ notmuch_restore_command (notmuch_config_t *config, int argc, char *argv[])
     }
 
     notmuch_process_shared_options (argv[0]);
+    notmuch_exit_if_unmatched_db_revision (notmuch);
+
     name_for_error = input_file_name ? input_file_name : "stdin";
 
     if (! accumulate)
diff --git a/notmuch-search.c b/notmuch-search.c
index 5d17dac..453a041 100644
--- a/notmuch-search.c
+++ b/notmuch-search.c
@@ -583,6 +583,8 @@ _notmuch_search_prepare (search_context_t *ctx, notmuch_config_t *config, int ar
 	return EXIT_FAILURE;
     }
 
+    notmuch_exit_if_unmatched_db_revision (ctx->notmuch);
+
     query_str = query_string_from_args (ctx->notmuch, argc, argv);
     if (query_str == NULL) {
 	fprintf (stderr, "Out of memory.\n");
diff --git a/notmuch-setup.c b/notmuch-setup.c
index 5fc6e25..ddc6491 100644
--- a/notmuch-setup.c
+++ b/notmuch-setup.c
@@ -155,6 +155,10 @@ notmuch_setup_command (notmuch_config_t *config,
     if (opt_index < 0)
 	return EXIT_FAILURE;
 
+    if (notmuch_requested_db_revision)
+	fprintf (stderr, "Warning: ignoring --db-revision=%s\n",
+		 notmuch_requested_db_revision);
+
     notmuch_process_shared_options (argv[0]);
 
     if (notmuch_config_is_new (config))
diff --git a/notmuch-show.c b/notmuch-show.c
index 3917b82..de16db3 100644
--- a/notmuch-show.c
+++ b/notmuch-show.c
@@ -1220,6 +1220,8 @@ notmuch_show_command (notmuch_config_t *config, int argc, char *argv[])
 			       NOTMUCH_DATABASE_MODE_READ_ONLY, &notmuch))
 	return EXIT_FAILURE;
 
+    notmuch_exit_if_unmatched_db_revision (notmuch);
+
     query = notmuch_query_create (notmuch, query_string);
     if (query == NULL) {
 	fprintf (stderr, "Out of memory\n");
diff --git a/notmuch-tag.c b/notmuch-tag.c
index 35f971d..2c54eec 100644
--- a/notmuch-tag.c
+++ b/notmuch-tag.c
@@ -261,6 +261,8 @@ notmuch_tag_command (notmuch_config_t *config, int argc, char *argv[])
 			       NOTMUCH_DATABASE_MODE_READ_WRITE, &notmuch))
 	return EXIT_FAILURE;
 
+    notmuch_exit_if_unmatched_db_revision (notmuch);
+
     if (notmuch_config_get_maildir_synchronize_flags (config))
 	tag_flags |= TAG_FLAG_MAILDIR_SYNC;
 
diff --git a/notmuch.c b/notmuch.c
index c7f8c8f..90e6de3 100644
--- a/notmuch.c
+++ b/notmuch.c
@@ -47,10 +47,12 @@ static int
 _help_for (const char *topic);
 
 static notmuch_bool_t print_version = FALSE, print_help = FALSE;
+char *notmuch_requested_db_revision = NULL;
 
 const notmuch_opt_desc_t notmuch_shared_options [] = {
     { NOTMUCH_OPT_BOOLEAN, &print_version, "version", 'v', 0 },
     { NOTMUCH_OPT_BOOLEAN, &print_help, "help", 'h', 0 },
+    { NOTMUCH_OPT_STRING, &notmuch_requested_db_revision, "db-revision", 'd', 0 },
     {0, 0, 0, 0, 0}
 };
 
@@ -196,6 +198,22 @@ be supported in the future.\n", notmuch_format_version);
     }
 }
 
+void
+notmuch_exit_if_unmatched_db_revision (notmuch_database_t *notmuch)
+{
+    const char *uuid = NULL;
+
+    if (!notmuch_requested_db_revision)
+	return;
+    IGNORE_RESULT (notmuch_database_get_revision (notmuch, &uuid));
+
+    if (strcmp (notmuch_requested_db_revision, uuid) != 0){
+	fprintf (stderr, "Error: requested database revision %s does not match %s\n",
+		 notmuch_requested_db_revision, uuid);
+	exit (1);
+    }
+}
+
 static void
 exec_man (const char *page)
 {
-- 
2.1.4