lib: add thread subqueries.

This change allows queries of the form

 thread:{from:me} and thread:{from:jian} and not thread:{from:dave}

This is still somewhat brute-force, but it's a big improvement over
both the shell script solution and the previous proposal [1], because it
does not build the whole thread structure just generate a
query. A further potential optimization is to replace the calls to
notmuch with more specialized Xapian code; in particular it's not
likely that reading all of the message metadata is a win here.

[1]: id:20170820213240.20526-1-david@tethera.net

1 files changed, 46 insertions, 0 deletions

diff --git a/test/T585-thread-subquery.sh b/test/T585-thread-subquery.sh
new file mode 100755
index 00000000..71ced149
--- /dev/null
+++ b/test/T585-thread-subquery.sh
@@ -0,0 +1,46 @@
+#!/usr/bin/env bash
+#
+# Copyright (c) 2018 David Bremner
+#
+
+test_description='test of searching by using thread subqueries'
+
+. $(dirname "$0")/test-lib.sh || exit 1
+
+add_email_corpus
+
+test_begin_subtest "Basic query that matches no messages"
+count=$(notmuch count from:keithp and to:keithp)
+test_expect_equal 0 "$count"
+
+test_begin_subtest "Same query against threads"
+notmuch search thread:{from:keithp} and thread:{to:keithp} | notmuch_search_sanitize > OUTPUT
+cat<<EOF > EXPECTED
+thread:XXX   2009-11-18 [7/7] Lars Kellogg-Stedman, Mikhail Gusarov, Keith Packard, Carl Worth; [notmuch] Working with Maildir storage? (inbox signed unread)
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "Mix thread and non-threads query"
+notmuch search thread:{from:keithp} and to:keithp | notmuch_search_sanitize > OUTPUT
+cat<<EOF > EXPECTED
+thread:XXX   2009-11-18 [1/7] Lars Kellogg-Stedman| Mikhail Gusarov, Keith Packard, Carl Worth; [notmuch] Working with Maildir storage? (inbox signed unread)
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "Compound subquery"
+notmuch search 'thread:"{from:keithp and date:2009}" and thread:{to:keithp}' | notmuch_search_sanitize > OUTPUT
+cat<<EOF > EXPECTED
+thread:XXX   2009-11-18 [7/7] Lars Kellogg-Stedman, Mikhail Gusarov, Keith Packard, Carl Worth; [notmuch] Working with Maildir storage? (inbox signed unread)
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "Syntax/quoting error in subquery"
+notmuch search 'thread:{from:keithp and date:2009} and thread:{to:keithp}' 1>OUTPUT 2>&1
+cat<<EOF > EXPECTED
+notmuch search: A Xapian exception occurred
+A Xapian exception occurred parsing query: missing } in '{from:keithp'
+Query string was: thread:{from:keithp and date:2009} and thread:{to:keithp}
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_done