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https://git.notmuchmail.org/git/notmuch
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lib/parse-sexp: parse single terms and the empty list.
There is not much of a parser here yet, but it already does some useful error reporting. Most functionality sketched in the documentation is not implemented yet; detailed documentation will follow with the implementation.
This commit is contained in:
David Bremner
parent
9ae4188610
commit
be7e83de96
9 changed files with 217 additions and 14 deletions
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@ -159,6 +159,10 @@ man_pages = [
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u'syntax for notmuch queries',
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[notmuch_authors], 7),
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('man7/notmuch-sexp-queries', 'notmuch-sexp-queries',
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u's-expression syntax for notmuch queries',
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[notmuch_authors], 7),
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('man1/notmuch-show', 'notmuch-show',
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u'show messages matching the given search terms',
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[notmuch_authors], 1),
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@ -24,6 +24,7 @@ Contents:
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man1/notmuch-restore
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man1/notmuch-search
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man7/notmuch-search-terms
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man7/notmuch-sexp-queries
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man1/notmuch-show
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man1/notmuch-tag
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python-bindings
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81
doc/man7/notmuch-sexp-queries.rst
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81
doc/man7/notmuch-sexp-queries.rst
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@ -0,0 +1,81 @@
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.. _notmuch-sexp-queries(7):
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====================
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notmuch-sexp-queries
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====================
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SYNOPSIS
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========
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**notmuch** **search** ``--query=sexp`` '(and (to santa) (date december))'
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DESCRIPTION
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===========
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S-EXPRESSIONS
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-------------
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An *s-expression* is either an atom, or list of whitespace delimited
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s-expressions inside parentheses. Atoms are either
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*basic value*
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A basic value is an unquoted string containing no whitespace, double quotes, or
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parentheses.
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*quoted string*
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Double quotes (") delimit strings possibly containing whitespace
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or parentheses. These can contain double quote characters by
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escaping with backslash. E.g. ``"this is a quote \""``.
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S-EXPRESSION QUERIES
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--------------------
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An s-expression query is either an atom, the empty list, or a
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*compound query* consisting of a prefix atom (first element) defining
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a *field*, *logical operation*, or *modifier*, and 0 or more
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subqueries.
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``*``
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``()``
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The empty list matches all messages
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*term*
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Match all messages containing *term*, possibly after stemming
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or phase splitting.
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``(`` *field* |q1| |q2| ... |qn| ``)``
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Restrict the queries |q1| to |qn| to *field*, and combine with *and*
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(for most fields) or *or*. See :any:`fields` for more information.
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``(`` *operator* |q1| |q2| ... |qn| ``)``
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Combine queries |q1| to |qn|. See :any:`operators` for more information.
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``(`` *modifier* |q1| |q2| ... |qn| ``)``
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Combine queries |q1| to |qn|, and reinterpret the result (e.g. as a regular expression).
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See :any:`modifiers` for more information.
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.. _fields:
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FIELDS
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``````
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.. _operators:
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OPERATORS
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`````````
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.. _modifiers:
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MODIFIERS
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`````````
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EXAMPLES
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========
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``Wizard``
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Match all messages containing the word "wizard", ignoring case.
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.. |q1| replace:: :math:`q_1`
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.. |q2| replace:: :math:`q_2`
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.. |qn| replace:: :math:`q_n`
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@ -63,7 +63,8 @@ libnotmuch_cxx_srcs = \
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$(dir)/features.cc \
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$(dir)/prefix.cc \
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$(dir)/open.cc \
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$(dir)/init.cc
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$(dir)/init.cc \
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$(dir)/parse-sexp.cc
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libnotmuch_modules := $(libnotmuch_c_srcs:.c=.o) $(libnotmuch_cxx_srcs:.cc=.o)
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@ -300,4 +300,11 @@ _notmuch_database_setup_standard_query_fields (notmuch_database_t *notmuch);
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notmuch_status_t
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_notmuch_database_setup_user_query_fields (notmuch_database_t *notmuch);
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#if __cplusplus
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/* parse-sexp.cc */
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notmuch_status_t
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_notmuch_sexp_string_to_xapian_query (notmuch_database_t *notmuch, const char *querystr,
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Xapian::Query &output);
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#endif
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#endif
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55
lib/parse-sexp.cc
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55
lib/parse-sexp.cc
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@ -0,0 +1,55 @@
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#include <xapian.h>
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#include "notmuch-private.h"
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#if HAVE_SFSEXP
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#include "sexp.h"
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/* _sexp is used for file scope symbols to avoid clashing with
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* definitions from sexp.h */
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/* Here we expect the s-expression to be a proper list, with first
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* element defining and operation, or as a special case the empty
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* list */
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static notmuch_status_t
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_sexp_to_xapian_query (notmuch_database_t *notmuch, const sexp_t *sx,
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Xapian::Query &output)
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{
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if (sx->ty == SEXP_VALUE) {
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output = Xapian::Query (Xapian::Unicode::tolower (sx->val));
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return NOTMUCH_STATUS_SUCCESS;
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}
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/* Empty list */
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if (! sx->list) {
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output = Xapian::Query::MatchAll;
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return NOTMUCH_STATUS_SUCCESS;
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}
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if (sx->list->ty == SEXP_VALUE)
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_notmuch_database_log (notmuch, "unknown prefix '%s'\n", sx->list->val);
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else
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_notmuch_database_log (notmuch, "unexpected list in field/operation position\n",
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sx->list->val);
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return NOTMUCH_STATUS_BAD_QUERY_SYNTAX;
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}
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notmuch_status_t
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_notmuch_sexp_string_to_xapian_query (notmuch_database_t *notmuch, const char *querystr,
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Xapian::Query &output)
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{
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const sexp_t *sx = NULL;
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char *buf = talloc_strdup (notmuch, querystr);
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sx = parse_sexp (buf, strlen (querystr));
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if (! sx) {
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_notmuch_database_log (notmuch, "invalid s-expression: '%s'\n", querystr);
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return NOTMUCH_STATUS_BAD_QUERY_SYNTAX;
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}
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return _sexp_to_xapian_query (notmuch, sx, output);
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}
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#endif
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@ -23,10 +23,6 @@
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#include <glib.h> /* GHashTable, GPtrArray */
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#if HAVE_SFSEXP
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#include "sexp.h"
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#endif
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struct _notmuch_query {
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notmuch_database_t *notmuch;
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const char *query_string;
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@ -210,8 +206,8 @@ _notmuch_query_ensure_parsed_sexpr (notmuch_query_t *query)
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if (query->parsed)
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return NOTMUCH_STATUS_SUCCESS;
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query->xapian_query = Xapian::Query::MatchAll;
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return NOTMUCH_STATUS_SUCCESS;
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return _notmuch_sexp_string_to_xapian_query (query->notmuch, query->query_string,
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query->xapian_query);
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}
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static notmuch_status_t
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@ -189,11 +189,4 @@ test_begin_subtest "parts do not have adjacent term positions"
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output=$(notmuch search id:termpos and '"c x"')
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test_expect_equal "$output" ""
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if [[ NOTMUCH_HAVE_SFSEXP = 1 ]]; then
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test_begin_subtest "sexpr query: all messages"
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notmuch search '*' > EXPECTED
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notmuch search --query=sexp '()' > OUTPUT
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test_expect_equal_file EXPECTED OUTPUT
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fi
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test_done
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65
test/T081-sexpr-search.sh
Executable file
65
test/T081-sexpr-search.sh
Executable file
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@ -0,0 +1,65 @@
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#!/usr/bin/env bash
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test_description='"notmuch search" in several variations'
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. $(dirname "$0")/test-lib.sh || exit 1
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if [ $NOTMUCH_HAVE_SFSEXP -ne 1 ]; then
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printf "Skipping due to missing sfsexp library\n"
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test_done
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fi
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add_email_corpus
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test_begin_subtest "all messages: ()"
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notmuch search '*' > EXPECTED
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notmuch search --query=sexp "()" > OUTPUT
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test_expect_equal_file EXPECTED OUTPUT
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test_begin_subtest "single term in body"
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notmuch search --query=sexp 'wizard' | notmuch_search_sanitize>OUTPUT
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cat <<EOF > EXPECTED
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thread:XXX 2009-11-18 [1/3] Carl Worth| Jan Janak; [notmuch] What a great idea! (inbox unread)
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EOF
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test_expect_equal_file EXPECTED OUTPUT
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test_begin_subtest "single term in body (case insensitive)"
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notmuch search --query=sexp 'Wizard' | notmuch_search_sanitize>OUTPUT
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cat <<EOF > EXPECTED
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thread:XXX 2009-11-18 [1/3] Carl Worth| Jan Janak; [notmuch] What a great idea! (inbox unread)
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EOF
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test_expect_equal_file EXPECTED OUTPUT
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test_begin_subtest "single term in body, stemmed version"
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test_subtest_known_broken
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notmuch search arriv > EXPECTED
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notmuch search --query=sexp arriv > OUTPUT
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test_expect_equal_file EXPECTED OUTPUT
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test_begin_subtest "Unbalanced parens"
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# A code 1 indicates the error was handled (a crash will return e.g. 139).
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test_expect_code 1 "notmuch search --query=sexp '('"
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test_begin_subtest "Unbalanced parens, error message"
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notmuch search --query=sexp '(' >OUTPUT 2>&1
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cat <<EOF > EXPECTED
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notmuch search: Syntax error in query
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invalid s-expression: '('
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EOF
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test_expect_equal_file EXPECTED OUTPUT
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test_begin_subtest "unknown prefix"
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notmuch search --query=sexp '(foo)' >OUTPUT 2>&1
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cat <<EOF > EXPECTED
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notmuch search: Syntax error in query
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unknown prefix 'foo'
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EOF
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test_expect_equal_file EXPECTED OUTPUT
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test_begin_subtest "list as prefix"
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notmuch search --query=sexp '((foo))' >OUTPUT 2>&1
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cat <<EOF > EXPECTED
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notmuch search: Syntax error in query
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unexpected list in field/operation position
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EOF
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test_expect_equal_file EXPECTED OUTPUT
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test_done
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