[PATCH Draft 2 8/9] notmuch-restore: auto detect format of backup
David Bremner
david at tethera.net
Sun Dec 18 05:15:10 PST 2011
From: David Bremner <bremner at debian.org>
The simple heuristic relies on the fact that '(' is not part of the
character set used by hex-escape. Since hex-escape is designed to be
OK for pathnames (and shells), this seems like a reasonable
assumption.
In principle the --format argument to notmuch-restore is notmuch
needed at this point, but it adds literally 5 lines of argument
description, so I left it.
---
dump-restore-private.h | 5 +++--
notmuch-restore.c | 45 ++++++++++++++++++++++++++++++++-------------
2 files changed, 35 insertions(+), 15 deletions(-)
diff --git a/dump-restore-private.h b/dump-restore-private.h
index 34a5022..67795e5 100644
--- a/dump-restore-private.h
+++ b/dump-restore-private.h
@@ -5,8 +5,9 @@
#include "command-line-arguments.h"
typedef enum dump_formats {
- DUMP_FORMAT_SUP,
- DUMP_FORMAT_NOTMUCH
+ DUMP_FORMAT_AUTO,
+ DUMP_FORMAT_NOTMUCH,
+ DUMP_FORMAT_SUP
} dump_format_t;
#endif
diff --git a/notmuch-restore.c b/notmuch-restore.c
index f618b47..340f31f 100644
--- a/notmuch-restore.c
+++ b/notmuch-restore.c
@@ -36,7 +36,7 @@ notmuch_restore_command (unused (void *ctx), int argc, char *argv[])
regex_t regex;
int rerr;
int opt_index;
- int input_format = DUMP_FORMAT_SUP;
+ int input_format = DUMP_FORMAT_AUTO;
config = notmuch_config_open (ctx, NULL, NULL);
if (config == NULL)
@@ -50,7 +50,11 @@ notmuch_restore_command (unused (void *ctx), int argc, char *argv[])
synchronize_flags = notmuch_config_get_maildir_synchronize_flags (config);
notmuch_opt_desc_t options[] = {
- FORMAT_DESC (input_format),
+ { NOTMUCH_OPT_KEYWORD, &input_format, "format", 'f',
+ (notmuch_keyword_t []){ { "auto", DUMP_FORMAT_AUTO },
+ { "notmuch", DUMP_FORMAT_NOTMUCH },
+ { "sup", DUMP_FORMAT_SUP },
+ {0, 0} } },
{ NOTMUCH_OPT_POSITION, &input_file_name, 0, 0, 0 },
{ NOTMUCH_OPT_BOOLEAN, &accumulate, "accumulate", 'a', 0 },
{ 0, 0, 0, 0, 0 }
@@ -80,17 +84,6 @@ notmuch_restore_command (unused (void *ctx), int argc, char *argv[])
return 1;
}
- /* Dump output is one line per message. We match a sequence of
- * non-space characters for the message-id, then one or more
- * spaces, then a list of space-separated tags as a sequence of
- * characters within literal '(' and ')'. */
- if (input_format == DUMP_FORMAT_SUP) {
- if ( xregcomp (®ex,
- "^([^ ]+) \\(([^)]*)\\)$",
- REG_EXTENDED) )
- INTERNAL_ERROR("compile time constant regex failed.");
- }
-
/* These are out here to re-use the buffers with hex_decode */
@@ -98,6 +91,7 @@ notmuch_restore_command (unused (void *ctx), int argc, char *argv[])
size_t message_id_size = 0;
char *tag = NULL;
size_t tag_size = 0;
+ notmuch_bool_t first_line = TRUE;
while ((line_len = getline (&line, &line_size, input)) != -1) {
regmatch_t match[3];
@@ -109,6 +103,30 @@ notmuch_restore_command (unused (void *ctx), int argc, char *argv[])
char *db_tags_str;
chomp_newline (line);
+ if (first_line && input_format == DUMP_FORMAT_AUTO) {
+ char *p;
+
+ for (p = line; *p; p++) {
+ if (*p == '(')
+ input_format = DUMP_FORMAT_SUP;
+ }
+
+ if (input_format == DUMP_FORMAT_AUTO)
+ input_format = DUMP_FORMAT_NOTMUCH;
+
+ }
+
+ /* sup dump output is one line per message. We match a
+ * sequence of non-space characters for the message-id, then
+ * one or more spaces, then a list of space-separated tags as
+ * a sequence of characters within literal '(' and ')'. */
+ if (first_line && input_format == DUMP_FORMAT_SUP) {
+ if ( xregcomp (®ex,
+ "^([^ ]+) \\(([^)]*)\\)$",
+ REG_EXTENDED) )
+ INTERNAL_ERROR("compile time constant regex failed.");
+ }
+
/* Silently ignore blank lines */
@@ -141,6 +159,7 @@ notmuch_restore_command (unused (void *ctx), int argc, char *argv[])
file_tags = xstrdup (p);
}
+ first_line = FALSE;
status = notmuch_database_find_message (notmuch, message_id, &message);
if (status || message == NULL) {
--
1.7.7.3
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