[PATCH v5 0/6] Use Xapian query syntax for batch-tag dump/restore
Jani Nikula
jani at nikula.org
Sun Jan 6 14:01:49 PST 2013
On Sun, 06 Jan 2013, Austin Clements <amdragon at MIT.EDU> wrote:
> This obsoletes
>
> id:1356936162-2589-1-git-send-email-amdragon at mit.edu
>
> v5 should address all of the comments on v4 except those I
> specifically replied to (via the ML or IRC). It also adds a new patch
> at the beginning that makes missing message IDs non-fatal in restore,
> like they were in 0.14. This patch can be pushed separately; it's in
> this series because later tests rely on it.
The series LGMT,
Jani.
>
> The diff from v4 follows.
>
> diff --git a/notmuch-dump.c b/notmuch-dump.c
> index bf01a39..a3244e0 100644
> --- a/notmuch-dump.c
> +++ b/notmuch-dump.c
> @@ -103,6 +103,18 @@ notmuch_dump_command (unused (void *ctx), int argc, char *argv[])
> message = notmuch_messages_get (messages);
> message_id = notmuch_message_get_message_id (message);
>
> + if (output_format == DUMP_FORMAT_BATCH_TAG &&
> + strchr (message_id, '\n')) {
> + /* This will produce a line break in the output, which
> + * would be difficult to handle in tools. However, it's
> + * also impossible to produce an email containing a line
> + * break in a message ID because of unfolding, so we can
> + * safely disallow it. */
> + fprintf (stderr, "Warning: skipping message id containing line break: \"%s\"\n", message_id);
> + notmuch_message_destroy (message);
> + continue;
> + }
> +
> if (output_format == DUMP_FORMAT_SUP) {
> fprintf (output, "%s (", message_id);
> }
> @@ -133,19 +145,10 @@ notmuch_dump_command (unused (void *ctx), int argc, char *argv[])
> if (output_format == DUMP_FORMAT_SUP) {
> fputs (")\n", output);
> } else {
> - if (strchr (message_id, '\n')) {
> - /* This will produce a line break in the output, which
> - * would be difficult to handle in tools. However,
> - * it's also impossible to produce an email containing
> - * a line break in a message ID because of unfolding,
> - * so we can safely disallow it. */
> - fprintf (stderr, "Error: cannot dump message id containing line break: %s\n", message_id);
> - return 1;
> - }
> if (make_boolean_term (notmuch, "id", message_id,
> &buffer, &buffer_size)) {
> - fprintf (stderr, "Error: failed to quote message id %s\n",
> - message_id);
> + fprintf (stderr, "Error quoting message id %s: %s\n",
> + message_id, strerror (errno));
> return 1;
> }
> fprintf (output, " -- %s\n", buffer);
> diff --git a/notmuch-restore.c b/notmuch-restore.c
> index 77a4c27..81d4d98 100644
> --- a/notmuch-restore.c
> +++ b/notmuch-restore.c
> @@ -26,7 +26,8 @@
> static regex_t regex;
>
> /* Non-zero return indicates an error in retrieving the message,
> - * or in applying the tags.
> + * or in applying the tags. Missing messages are reported, but not
> + * considered errors.
> */
> static int
> tag_message (unused (void *ctx),
> @@ -40,13 +41,17 @@ tag_message (unused (void *ctx),
> int ret = 0;
>
> status = notmuch_database_find_message (notmuch, message_id, &message);
> - if (status || message == NULL) {
> - fprintf (stderr, "Warning: cannot apply tags to %smessage: %s\n",
> - message ? "" : "missing ", message_id);
> - if (status)
> - fprintf (stderr, "%s\n", notmuch_status_to_string (status));
> + if (status) {
> + fprintf (stderr, "Error applying tags to message %s: %s\n",
> + message_id, notmuch_status_to_string (status));
> return 1;
> }
> + if (message == NULL) {
> + fprintf (stderr, "Warning: cannot apply tags to missing message: %s\n",
> + message_id);
> + /* We consider this a non-fatal error. */
> + return 0;
> + }
>
> /* In order to detect missing messages, this check/optimization is
> * intentionally done *after* first finding the message. */
> @@ -222,12 +227,17 @@ notmuch_restore_command (unused (void *ctx), int argc, char *argv[])
> if (ret == 0) {
> ret = parse_boolean_term (line_ctx, query_string,
> &prefix, &term);
> - if (ret) {
> - fprintf (stderr, "Warning: cannot parse query: %s\n",
> - query_string);
> + if (ret && errno == EINVAL) {
> + fprintf (stderr, "Warning: cannot parse query: %s (skipping)\n", query_string);
> continue;
> + } else if (ret) {
> + /* This is more fatal (e.g., out of memory) */
> + fprintf (stderr, "Error parsing query: %s\n",
> + strerror (errno));
> + ret = 1;
> + break;
> } else if (strcmp ("id", prefix) != 0) {
> - fprintf (stderr, "Warning: not an id query: %s\n", query_string);
> + fprintf (stderr, "Warning: not an id query: %s (skipping)\n", query_string);
> continue;
> }
> query_string = term;
> diff --git a/test/dump-restore b/test/dump-restore
> index f9ae5b3..f076c12 100755
> --- a/test/dump-restore
> +++ b/test/dump-restore
> @@ -202,18 +202,32 @@ a
> + +e -- id:20091117232137.GA7669 at griffis1.net
> # valid id, but warning about missing message
> +e id:missing_message_id
> +# exercise parser
> ++e -- id:some)stuff
> ++e -- id:some stuff
> ++e -- id:some"stuff
> ++e -- id:"a_message_id_with""_a_quote"
> ++e -- id:"a message id with spaces"
> ++e -- id:an_id_with_leading_and_trailing_ws \
> +
> EOF
>
> cat <<EOF > EXPECTED
> -Warning: cannot parse query: a
> +Warning: cannot parse query: a (skipping)
> Warning: no query string [+0]
> Warning: no query string [+a +b]
> Warning: missing query string [+a +b ]
> Warning: no query string after -- [+c +d --]
> Warning: hex decoding of tag %zz failed [+%zz -- id:whatever]
> -Warning: cannot parse query: id:"
> -Warning: not an id query: tag:abc
> +Warning: cannot parse query: id:" (skipping)
> +Warning: not an id query: tag:abc (skipping)
> Warning: cannot apply tags to missing message: missing_message_id
> +Warning: cannot parse query: id:some)stuff (skipping)
> +Warning: cannot parse query: id:some stuff (skipping)
> +Warning: cannot apply tags to missing message: some"stuff
> +Warning: cannot apply tags to missing message: a_message_id_with"_a_quote
> +Warning: cannot apply tags to missing message: a message id with spaces
> +Warning: cannot apply tags to missing message: an_id_with_leading_and_trailing_ws
> EOF
>
> test_expect_equal_file EXPECTED OUTPUT
> diff --git a/util/string-util.c b/util/string-util.c
> index 52c7781..aba9aa8 100644
> --- a/util/string-util.c
> +++ b/util/string-util.c
> @@ -23,6 +23,7 @@
> #include "talloc.h"
>
> #include <ctype.h>
> +#include <errno.h>
>
> char *
> strtok_len (char *s, const char *delim, size_t *len)
> @@ -36,6 +37,12 @@ strtok_len (char *s, const char *delim, size_t *len)
> return *len ? s : NULL;
> }
>
> +static int
> +is_unquoted_terminator (unsigned char c)
> +{
> + return c == 0 || c <= ' ' || c == ')';
> +}
> +
> int
> make_boolean_term (void *ctx, const char *prefix, const char *term,
> char **buf, size_t *len)
> @@ -49,7 +56,8 @@ make_boolean_term (void *ctx, const char *prefix, const char *term,
> * containing a quote, even though it only matters at the
> * beginning, and anything containing non-ASCII text. */
> for (in = term; *in && !need_quoting; in++)
> - if (*in <= ' ' || *in == ')' || *in == '"' || (unsigned char)*in > 127)
> + if (is_unquoted_terminator (*in) || *in == '"'
> + || (unsigned char)*in > 127)
> need_quoting = 1;
>
> if (need_quoting)
> @@ -67,8 +75,10 @@ make_boolean_term (void *ctx, const char *prefix, const char *term,
> *buf = talloc_realloc (ctx, *buf, char, *len);
> }
>
> - if (! *buf)
> - return 1;
> + if (! *buf) {
> + errno = ENOMEM;
> + return -1;
> + }
>
> out = *buf;
>
> @@ -102,7 +112,7 @@ make_boolean_term (void *ctx, const char *prefix, const char *term,
> static const char*
> skip_space (const char *str)
> {
> - while (*str && isspace (*str))
> + while (*str && isspace ((unsigned char) *str))
> ++str;
> return str;
> }
> @@ -111,6 +121,7 @@ int
> parse_boolean_term (void *ctx, const char *str,
> char **prefix_out, char **term_out)
> {
> + int err = EINVAL;
> *prefix_out = *term_out = NULL;
>
> /* Parse prefix */
> @@ -119,12 +130,20 @@ parse_boolean_term (void *ctx, const char *str,
> if (! pos)
> goto FAIL;
> *prefix_out = talloc_strndup (ctx, str, pos - str);
> + if (! *prefix_out) {
> + err = ENOMEM;
> + goto FAIL;
> + }
> ++pos;
>
> /* Implement de-quoting compatible with make_boolean_term. */
> if (*pos == '"') {
> char *out = talloc_array (ctx, char, strlen (pos));
> int closed = 0;
> + if (! out) {
> + err = ENOMEM;
> + goto FAIL;
> + }
> *term_out = out;
> /* Skip the opening quote, find the closing quote, and
> * un-double doubled internal quotes. */
> @@ -148,18 +167,25 @@ parse_boolean_term (void *ctx, const char *str,
> } else {
> const char *start = pos;
> /* Check for text after the boolean term. */
> - while (*pos > ' ' && *pos != ')')
> + while (! is_unquoted_terminator (*pos))
> ++pos;
> - if (*skip_space (pos))
> + if (*skip_space (pos)) {
> + err = EINVAL;
> goto FAIL;
> + }
> /* No trailing text; dup the string so the caller can free
> * it. */
> *term_out = talloc_strndup (ctx, start, pos - start);
> + if (! *term_out) {
> + err = ENOMEM;
> + goto FAIL;
> + }
> }
> return 0;
>
> FAIL:
> talloc_free (*prefix_out);
> talloc_free (*term_out);
> - return 1;
> + errno = err;
> + return -1;
> }
> diff --git a/util/string-util.h b/util/string-util.h
> index 8b9fe50..0194607 100644
> --- a/util/string-util.h
> +++ b/util/string-util.h
> @@ -28,7 +28,8 @@ char *strtok_len (char *s, const char *delim, size_t *len);
> * can be parsed by parse_boolean_term.
> *
> * Output is into buf; it may be talloc_realloced.
> - * Return: 0 on success, non-zero on memory allocation failure.
> + * Return: 0 on success, -1 on error. errno will be set to ENOMEM if
> + * there is an allocation failure.
> */
> int make_boolean_term (void *talloc_ctx, const char *prefix, const char *term,
> char **buf, size_t *len);
> @@ -42,7 +43,8 @@ int make_boolean_term (void *talloc_ctx, const char *prefix, const char *term,
> * of the quoting styles supported by Xapian (and hence notmuch).
> * *prefix_out and *term_out will be talloc'd with context ctx.
> *
> - * Return: 0 on success, non-zero on parse error.
> + * Return: 0 on success, -1 on error. errno will be set to EINVAL if
> + * there is a parse error or ENOMEM if there is an allocation failure.
> */
> int
> parse_boolean_term (void *ctx, const char *str,
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