Initially support selection of query syntax in two subcommands to
enable testing.
---
 notmuch-search.c     | 16 +++++++++++++++-
 test/T080-search.sh  |  5 +++++
 test/T095-address.sh |  5 +++++
 3 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/notmuch-search.c b/notmuch-search.c
index 244817a9..fd25a414 100644
--- a/notmuch-search.c
+++ b/notmuch-search.c
@@ -43,6 +43,11 @@ typedef enum {
     DEDUP_ADDRESS,
 } dedup_t;
 
+typedef enum {
+    QUERY_SYNTAX_XAPIAN,
+    QUERY_SYNTAX_SEXP
+} query_syntax_t;
+
 typedef enum {
     NOTMUCH_FORMAT_JSON,
     NOTMUCH_FORMAT_TEXT,
@@ -56,6 +61,7 @@ typedef struct {
     int format_sel;
     sprinter_t *format;
     int exclude;
+    int query_syntax;
     notmuch_query_t *query;
     int sort;
     int output;
@@ -721,7 +727,10 @@ _notmuch_search_prepare (search_context_t *ctx, int argc, char *argv[])
 	return EXIT_FAILURE;
     }
 
-    ctx->query = notmuch_query_create (ctx->notmuch, query_str);
+    if (ctx->query_syntax == QUERY_SYNTAX_SEXP)
+	ctx->query = notmuch_query_create_sexpr (ctx->notmuch, query_str);
+    else
+	ctx->query = notmuch_query_create (ctx->notmuch, query_str);
     if (ctx->query == NULL) {
 	fprintf (stderr, "Out of memory\n");
 	return EXIT_FAILURE;
@@ -771,6 +780,7 @@ static search_context_t search_context = {
     .format_sel = NOTMUCH_FORMAT_TEXT,
     .exclude = NOTMUCH_EXCLUDE_TRUE,
     .sort = NOTMUCH_SORT_NEWEST_FIRST,
+    .query_syntax = QUERY_SYNTAX_XAPIAN,
     .output = 0,
     .offset = 0,
     .limit = -1, /* unlimited */
@@ -789,6 +799,10 @@ static const notmuch_opt_desc_t common_options[] = {
 				  { "text", NOTMUCH_FORMAT_TEXT },
 				  { "text0", NOTMUCH_FORMAT_TEXT0 },
 				  { 0, 0 } } },
+    { .opt_keyword = &search_context.query_syntax, .name = "query-syntax", .keywords =
+	  (notmuch_keyword_t []){ { "xapian", QUERY_SYNTAX_XAPIAN },
+				  { "sexp", QUERY_SYNTAX_SEXP },
+				  { 0, 0 } } },
     { .opt_int = &notmuch_format_version, .name = "format-version" },
     { }
 };
diff --git a/test/T080-search.sh b/test/T080-search.sh
index a3f0dead..966e772a 100755
--- a/test/T080-search.sh
+++ b/test/T080-search.sh
@@ -189,4 +189,9 @@ test_begin_subtest "parts do not have adjacent term positions"
 output=$(notmuch search id:termpos and '"c x"')
 test_expect_equal "$output" ""
 
+test_begin_subtest "sexpr query: all messages"
+notmuch search '*' > EXPECTED
+notmuch search --query-syntax=sexp '()' > OUTPUT
+test_expect_equal_file EXPECTED OUTPUT
+
 test_done
diff --git a/test/T095-address.sh b/test/T095-address.sh
index 817be538..adf0b307 100755
--- a/test/T095-address.sh
+++ b/test/T095-address.sh
@@ -325,4 +325,9 @@ cat <<EOF >EXPECTED
 EOF
 test_expect_equal_file EXPECTED OUTPUT
 
+test_begin_subtest "sexpr query: all messages"
+notmuch address '*' > EXPECTED
+notmuch address --query-syntax=sexp '()' > OUTPUT
+test_expect_equal_file EXPECTED OUTPUT
+
 test_done
-- 
2.30.2
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