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+From: Austin Clements <amdragon@MIT.EDU>\r
+To: notmuch@notmuchmail.org\r
+Subject: [PATCH v2 4/5] dump/restore: Use Xapian queries for batch-tag format\r
+Date: Tue, 25 Dec 2012 22:48:42 -0500\r
+Message-Id: <1356493723-11085-5-git-send-email-amdragon@mit.edu>\r
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+References: <1356493723-11085-1-git-send-email-amdragon@mit.edu>\r
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+\r
+This switches the new batch-tag format away from using a home-grown\r
+hex-encoding scheme for message IDs in the dump to simply using Xapian\r
+queries with Xapian quoting syntax.\r
+\r
+This has a variety of advantages beyond presenting a cleaner and more\r
+consistent interface. Foremost is that it will dramatically simplify\r
+the quoting for batch tagging, which shares the same input format.\r
+While the hex-encoding is no better or worse for the simple ID queries\r
+used by dump/restore, it becomes onerous for general-purpose queries\r
+used in batch tagging. It also better handles strange cases like\r
+"id:foo and bar", since this is no longer syntactically valid.\r
+---\r
+ notmuch-dump.c | 9 +++++----\r
+ notmuch-restore.c | 22 ++++++++++------------\r
+ tag-util.c | 6 ------\r
+ test/dump-restore | 14 ++++++++------\r
+ 4 files changed, 23 insertions(+), 28 deletions(-)\r
+\r
+diff --git a/notmuch-dump.c b/notmuch-dump.c\r
+index 29d79da..bf01a39 100644\r
+--- a/notmuch-dump.c\r
++++ b/notmuch-dump.c\r
+@@ -20,6 +20,7 @@\r
+ \r
+ #include "notmuch-client.h"\r
+ #include "dump-restore-private.h"\r
++#include "string-util.h"\r
+ \r
+ int\r
+ notmuch_dump_command (unused (void *ctx), int argc, char *argv[])\r
+@@ -141,13 +142,13 @@ notmuch_dump_command (unused (void *ctx), int argc, char *argv[])\r
+ fprintf (stderr, "Error: cannot dump message id containing line break: %s\n", message_id);\r
+ return 1;\r
+ }\r
+- if (hex_encode (notmuch, message_id,\r
+- &buffer, &buffer_size) != HEX_SUCCESS) {\r
+- fprintf (stderr, "Error: failed to hex-encode msg-id %s\n",\r
++ if (make_boolean_term (notmuch, "id", message_id,\r
++ &buffer, &buffer_size)) {\r
++ fprintf (stderr, "Error: failed to quote message id %s\n",\r
+ message_id);\r
+ return 1;\r
+ }\r
+- fprintf (output, " -- id:%s\n", buffer);\r
++ fprintf (output, " -- %s\n", buffer);\r
+ }\r
+ \r
+ notmuch_message_destroy (message);\r
+diff --git a/notmuch-restore.c b/notmuch-restore.c\r
+index 9ed9b51..77a4c27 100644\r
+--- a/notmuch-restore.c\r
++++ b/notmuch-restore.c\r
+@@ -207,7 +207,7 @@ notmuch_restore_command (unused (void *ctx), int argc, char *argv[])\r
+ INTERNAL_ERROR ("compile time constant regex failed.");\r
+ \r
+ do {\r
+- char *query_string;\r
++ char *query_string, *prefix, *term;\r
+ \r
+ if (line_ctx != NULL)\r
+ talloc_free (line_ctx);\r
+@@ -220,19 +220,17 @@ notmuch_restore_command (unused (void *ctx), int argc, char *argv[])\r
+ &query_string, tag_ops);\r
+ \r
+ if (ret == 0) {\r
+- if (strncmp ("id:", query_string, 3) != 0) {\r
+- fprintf (stderr, "Warning: unsupported query: %s\n", query_string);\r
++ ret = parse_boolean_term (line_ctx, query_string,\r
++ &prefix, &term);\r
++ if (ret) {\r
++ fprintf (stderr, "Warning: cannot parse query: %s\n",\r
++ query_string);\r
++ continue;\r
++ } else if (strcmp ("id", prefix) != 0) {\r
++ fprintf (stderr, "Warning: not an id query: %s\n", query_string);\r
+ continue;\r
+ }\r
+- /* delete id: from front of string; tag_message\r
+- * expects a raw message-id.\r
+- *\r
+- * XXX: Note that query string id:foo and bar will be\r
+- * interpreted as a message id "foo and bar". This\r
+- * should eventually be fixed to give a better error\r
+- * message.\r
+- */\r
+- query_string = query_string + 3;\r
++ query_string = term;\r
+ }\r
+ }\r
+ \r
+diff --git a/tag-util.c b/tag-util.c\r
+index 705b7ba..e4e5dda 100644\r
+--- a/tag-util.c\r
++++ b/tag-util.c\r
+@@ -124,12 +124,6 @@ parse_tag_line (void *ctx, char *line,\r
+ }\r
+ \r
+ /* tok now points to the query string */\r
+- if (hex_decode_inplace (tok) != HEX_SUCCESS) {\r
+- ret = line_error (TAG_PARSE_INVALID, line_for_error,\r
+- "hex decoding of query %s failed", tok);\r
+- goto DONE;\r
+- }\r
+-\r
+ *query_string = tok;\r
+ \r
+ DONE:\r
+diff --git a/test/dump-restore b/test/dump-restore\r
+index 6a989b6..f9ae5b3 100755\r
+--- a/test/dump-restore\r
++++ b/test/dump-restore\r
+@@ -195,23 +195,25 @@ a\r
+ \r
+ # the previous line was blank; also no yelling please\r
+ +%zz -- id:whatever\r
+-+e +f id:%yy\r
+++e +f id:"\r
+++e +f tag:abc\r
+ # the next non-comment line should report an an empty tag error for\r
+ # batch tagging, but not for restore\r
+ + +e -- id:20091117232137.GA7669@griffis1.net\r
+-# highlight the sketchy id parsing; this should be last\r
+-+g -- id:foo and bar\r
++# valid id, but warning about missing message\r
+++e id:missing_message_id\r
+ EOF\r
+ \r
+ cat <<EOF > EXPECTED\r
+-Warning: unsupported query: a\r
++Warning: cannot parse query: a\r
+ Warning: no query string [+0]\r
+ Warning: no query string [+a +b]\r
+ Warning: missing query string [+a +b ]\r
+ Warning: no query string after -- [+c +d --]\r
+ Warning: hex decoding of tag %zz failed [+%zz -- id:whatever]\r
+-Warning: hex decoding of query id:%yy failed [+e +f id:%yy]\r
+-Warning: cannot apply tags to missing message: foo and bar\r
++Warning: cannot parse query: id:"\r
++Warning: not an id query: tag:abc\r
++Warning: cannot apply tags to missing message: missing_message_id\r
+ EOF\r
+ \r
+ test_expect_equal_file EXPECTED OUTPUT\r
+-- \r
+1.7.10.4\r
+\r