cli/show: list all filenames of a message in the formatted output

Instead of just having the first filename for the message, list all
duplicate filenames of the message as a list in the formatted
outputs. This bumps the format version to 3.

14 files changed, 57 insertions, 41 deletions

diff --git a/devel/schemata b/devel/schemata
index 41dc4a60..6dede7a4 100644
--- a/devel/schemata
+++ b/devel/schemata
@@ -26,6 +26,9 @@ v1
 v2
 - Added the thread_summary.query field.
 
+v3
+- Replaced message.filename string with a list of filenames.
+
 Common non-terminals
 --------------------
 
@@ -59,7 +62,7 @@ message = {
     # (format_message_sprinter)
     id:             messageid,
     match:          bool,
-    filename:	    string,
+    filename:	    [string*],
     timestamp:      unix_time, # date header as unix time
     date_relative:  string,   # user-friendly timestamp
     tags:           [string*],
diff --git a/notmuch-client.h b/notmuch-client.h
index d026e600..21b08798 100644
--- a/notmuch-client.h
+++ b/notmuch-client.h
@@ -145,7 +145,7 @@ chomp_newline (char *str)
  * this.  New (required) map fields can be added without increasing
  * this.
  */
-#define NOTMUCH_FORMAT_CUR 2
+#define NOTMUCH_FORMAT_CUR 3
 /* The minimum supported structured output format version.  Requests
  * for format versions below this will return an error. */
 #define NOTMUCH_FORMAT_MIN 1
diff --git a/notmuch-show.c b/notmuch-show.c
index 22fa655a..ab4ea1c2 100644
--- a/notmuch-show.c
+++ b/notmuch-show.c
@@ -133,7 +133,20 @@ format_message_sprinter (sprinter_t *sp, notmuch_message_t *message)
     sp->boolean (sp, notmuch_message_get_flag (message, NOTMUCH_MESSAGE_FLAG_EXCLUDED));
 
     sp->map_key (sp, "filename");
-    sp->string (sp, notmuch_message_get_filename (message));
+    if (notmuch_format_version >= 3) {
+	notmuch_filenames_t *filenames;
+
+	sp->begin_list (sp);
+	for (filenames = notmuch_message_get_filenames (message);
+	     notmuch_filenames_valid (filenames);
+	     notmuch_filenames_move_to_next (filenames)) {
+	    sp->string (sp, notmuch_filenames_get (filenames));
+	}
+	notmuch_filenames_destroy (filenames);
+	sp->end (sp);
+    } else {
+	sp->string (sp, notmuch_message_get_filename (message));
+    }
 
     sp->map_key (sp, "timestamp");
     date = notmuch_message_get_date (message);
diff --git a/test/T070-insert.sh b/test/T070-insert.sh
index 3dd76737..9120deba 100755
--- a/test/T070-insert.sh
+++ b/test/T070-insert.sh
@@ -43,7 +43,7 @@ expected='[[[{
  "id": "'"${gen_msg_id}"'",
  "match": true,
  "excluded": false,
- "filename": "'"${cur_msg_filename}"'",
+ "filename": ["'"${cur_msg_filename}"'"],
  "timestamp": 946728000,
  "date_relative": "2000-01-01",
  "tags": ["inbox","unread"],
diff --git a/test/T160-json.sh b/test/T160-json.sh
index b346f37e..099632b4 100755
--- a/test/T160-json.sh
+++ b/test/T160-json.sh
@@ -5,16 +5,16 @@ test_description="--format=json output"
 test_begin_subtest "Show message: json"
 add_message "[subject]=\"json-show-subject\"" "[date]=\"Sat, 01 Jan 2000 12:00:00 -0000\"" "[bcc]=\"test_suite+bcc@notmuchmail.org\"" "[reply-to]=\"test_suite+replyto@notmuchmail.org\"" "[body]=\"json-show-message\""
 output=$(notmuch show --format=json "json-show-message")
-test_expect_equal_json "$output" "[[[{\"id\": \"${gen_msg_id}\", \"match\": true, \"excluded\": false, \"filename\": \"${gen_msg_filename}\", \"timestamp\": 946728000, \"date_relative\": \"2000-01-01\", \"tags\": [\"inbox\",\"unread\"], \"headers\": {\"Subject\": \"json-show-subject\", \"From\": \"Notmuch Test Suite <test_suite@notmuchmail.org>\", \"To\": \"Notmuch Test Suite <test_suite@notmuchmail.org>\", \"Bcc\": \"test_suite+bcc@notmuchmail.org\", \"Reply-To\": \"test_suite+replyto@notmuchmail.org\", \"Date\": \"Sat, 01 Jan 2000 12:00:00 +0000\"}, \"body\": [{\"id\": 1, \"content-type\": \"text/plain\", \"content\": \"json-show-message\n\"}]}, []]]]"
+test_expect_equal_json "$output" "[[[{\"id\": \"${gen_msg_id}\", \"match\": true, \"excluded\": false, \"filename\": [\"${gen_msg_filename}\"], \"timestamp\": 946728000, \"date_relative\": \"2000-01-01\", \"tags\": [\"inbox\",\"unread\"], \"headers\": {\"Subject\": \"json-show-subject\", \"From\": \"Notmuch Test Suite <test_suite@notmuchmail.org>\", \"To\": \"Notmuch Test Suite <test_suite@notmuchmail.org>\", \"Bcc\": \"test_suite+bcc@notmuchmail.org\", \"Reply-To\": \"test_suite+replyto@notmuchmail.org\", \"Date\": \"Sat, 01 Jan 2000 12:00:00 +0000\"}, \"body\": [{\"id\": 1, \"content-type\": \"text/plain\", \"content\": \"json-show-message\n\"}]}, []]]]"
 
 # This should be the same output as above.
 test_begin_subtest "Show message: json --body=true"
 output=$(notmuch show --format=json --body=true "json-show-message")
-test_expect_equal_json "$output" "[[[{\"id\": \"${gen_msg_id}\", \"match\": true, \"excluded\": false, \"filename\": \"${gen_msg_filename}\", \"timestamp\": 946728000, \"date_relative\": \"2000-01-01\", \"tags\": [\"inbox\",\"unread\"], \"headers\": {\"Subject\": \"json-show-subject\", \"From\": \"Notmuch Test Suite <test_suite@notmuchmail.org>\", \"To\": \"Notmuch Test Suite <test_suite@notmuchmail.org>\", \"Bcc\": \"test_suite+bcc@notmuchmail.org\", \"Reply-To\": \"test_suite+replyto@notmuchmail.org\", \"Date\": \"Sat, 01 Jan 2000 12:00:00 +0000\"}, \"body\": [{\"id\": 1, \"content-type\": \"text/plain\", \"content\": \"json-show-message\n\"}]}, []]]]"
+test_expect_equal_json "$output" "[[[{\"id\": \"${gen_msg_id}\", \"match\": true, \"excluded\": false, \"filename\": [\"${gen_msg_filename}\"], \"timestamp\": 946728000, \"date_relative\": \"2000-01-01\", \"tags\": [\"inbox\",\"unread\"], \"headers\": {\"Subject\": \"json-show-subject\", \"From\": \"Notmuch Test Suite <test_suite@notmuchmail.org>\", \"To\": \"Notmuch Test Suite <test_suite@notmuchmail.org>\", \"Bcc\": \"test_suite+bcc@notmuchmail.org\", \"Reply-To\": \"test_suite+replyto@notmuchmail.org\", \"Date\": \"Sat, 01 Jan 2000 12:00:00 +0000\"}, \"body\": [{\"id\": 1, \"content-type\": \"text/plain\", \"content\": \"json-show-message\n\"}]}, []]]]"
 
 test_begin_subtest "Show message: json --body=false"
 output=$(notmuch show --format=json --body=false "json-show-message")
-test_expect_equal_json "$output" "[[[{\"id\": \"${gen_msg_id}\", \"match\": true, \"excluded\": false, \"filename\": \"${gen_msg_filename}\", \"timestamp\": 946728000, \"date_relative\": \"2000-01-01\", \"tags\": [\"inbox\",\"unread\"], \"headers\": {\"Subject\": \"json-show-subject\", \"From\": \"Notmuch Test Suite <test_suite@notmuchmail.org>\", \"To\": \"Notmuch Test Suite <test_suite@notmuchmail.org>\", \"Bcc\": \"test_suite+bcc@notmuchmail.org\", \"Reply-To\": \"test_suite+replyto@notmuchmail.org\", \"Date\": \"Sat, 01 Jan 2000 12:00:00 +0000\"}}, []]]]"
+test_expect_equal_json "$output" "[[[{\"id\": \"${gen_msg_id}\", \"match\": true, \"excluded\": false, \"filename\": [\"${gen_msg_filename}\"], \"timestamp\": 946728000, \"date_relative\": \"2000-01-01\", \"tags\": [\"inbox\",\"unread\"], \"headers\": {\"Subject\": \"json-show-subject\", \"From\": \"Notmuch Test Suite <test_suite@notmuchmail.org>\", \"To\": \"Notmuch Test Suite <test_suite@notmuchmail.org>\", \"Bcc\": \"test_suite+bcc@notmuchmail.org\", \"Reply-To\": \"test_suite+replyto@notmuchmail.org\", \"Date\": \"Sat, 01 Jan 2000 12:00:00 +0000\"}}, []]]]"
 
 test_begin_subtest "Search message: json"
 add_message "[subject]=\"json-search-subject\"" "[date]=\"Sat, 01 Jan 2000 12:00:00 -0000\"" "[body]=\"json-search-message\""
@@ -33,7 +33,7 @@ test_expect_equal_json "$output" "[{\"thread\": \"XXX\",
 test_begin_subtest "Show message: json, utf-8"
 add_message "[subject]=\"json-show-utf8-body-sübjéct\"" "[date]=\"Sat, 01 Jan 2000 12:00:00 -0000\"" "[body]=\"jsön-show-méssage\""
 output=$(notmuch show --format=json "jsön-show-méssage")
-test_expect_equal_json "$output" "[[[{\"id\": \"${gen_msg_id}\", \"match\": true, \"excluded\": false, \"filename\": \"${gen_msg_filename}\", \"timestamp\": 946728000, \"date_relative\": \"2000-01-01\", \"tags\": [\"inbox\",\"unread\"], \"headers\": {\"Subject\": \"json-show-utf8-body-sübjéct\", \"From\": \"Notmuch Test Suite <test_suite@notmuchmail.org>\", \"To\": \"Notmuch Test Suite <test_suite@notmuchmail.org>\", \"Date\": \"Sat, 01 Jan 2000 12:00:00 +0000\"}, \"body\": [{\"id\": 1, \"content-type\": \"text/plain\", \"content\": \"jsön-show-méssage\n\"}]}, []]]]"
+test_expect_equal_json "$output" "[[[{\"id\": \"${gen_msg_id}\", \"match\": true, \"excluded\": false, \"filename\": [\"${gen_msg_filename}\"], \"timestamp\": 946728000, \"date_relative\": \"2000-01-01\", \"tags\": [\"inbox\",\"unread\"], \"headers\": {\"Subject\": \"json-show-utf8-body-sübjéct\", \"From\": \"Notmuch Test Suite <test_suite@notmuchmail.org>\", \"To\": \"Notmuch Test Suite <test_suite@notmuchmail.org>\", \"Date\": \"Sat, 01 Jan 2000 12:00:00 +0000\"}, \"body\": [{\"id\": 1, \"content-type\": \"text/plain\", \"content\": \"jsön-show-méssage\n\"}]}, []]]]"
 
 test_begin_subtest "Show message: json, inline attachment filename"
 subject='json-show-inline-attachment-filename'
@@ -48,7 +48,7 @@ output=$(notmuch show --format=json "id:$id")
 filename=$(notmuch search --output=files "id:$id")
 # Get length of README after base64-encoding, minus additional newline.
 attachment_length=$(( $(base64 $TEST_DIRECTORY/README | wc -c) - 1 ))
-test_expect_equal_json "$output" "[[[{\"id\": \"$id\", \"match\": true, \"excluded\": false, \"filename\": \"$filename\", \"timestamp\": 946728000, \"date_relative\": \"2000-01-01\", \"tags\": [\"inbox\"], \"headers\": {\"Subject\": \"$subject\", \"From\": \"Notmuch Test Suite <test_suite@notmuchmail.org>\", \"To\": \"test_suite@notmuchmail.org\", \"Date\": \"Sat, 01 Jan 2000 12:00:00 +0000\"}, \"body\": [{\"id\": 1, \"content-type\": \"multipart/mixed\", \"content\": [{\"id\": 2, \"content-type\": \"text/plain\", \"content\": \"This is a test message with inline attachment with a filename\"}, {\"id\": 3, \"content-type\": \"application/octet-stream\", \"content-length\": $attachment_length, \"content-transfer-encoding\": \"base64\", \"filename\": \"README\"}]}]}, []]]]"
+test_expect_equal_json "$output" "[[[{\"id\": \"$id\", \"match\": true, \"excluded\": false, \"filename\": [\"$filename\"], \"timestamp\": 946728000, \"date_relative\": \"2000-01-01\", \"tags\": [\"inbox\"], \"headers\": {\"Subject\": \"$subject\", \"From\": \"Notmuch Test Suite <test_suite@notmuchmail.org>\", \"To\": \"test_suite@notmuchmail.org\", \"Date\": \"Sat, 01 Jan 2000 12:00:00 +0000\"}, \"body\": [{\"id\": 1, \"content-type\": \"multipart/mixed\", \"content\": [{\"id\": 2, \"content-type\": \"text/plain\", \"content\": \"This is a test message with inline attachment with a filename\"}, {\"id\": 3, \"content-type\": \"application/octet-stream\", \"content-length\": $attachment_length, \"content-transfer-encoding\": \"base64\", \"filename\": \"README\"}]}]}, []]]]"
 
 test_begin_subtest "Search message: json, utf-8"
 add_message "[subject]=\"json-search-utf8-body-sübjéct\"" "[date]=\"Sat, 01 Jan 2000 12:00:00 -0000\"" "[body]=\"jsön-search-méssage\""
diff --git a/test/T170-sexp.sh b/test/T170-sexp.sh
index 800ebc63..07113c0a 100755
--- a/test/T170-sexp.sh
+++ b/test/T170-sexp.sh
@@ -5,16 +5,16 @@ test_description="--format=sexp output"
 test_begin_subtest "Show message: sexp"
 add_message "[subject]=\"sexp-show-subject\"" "[date]=\"Sat, 01 Jan 2000 12:00:00 -0000\"" "[bcc]=\"test_suite+bcc@notmuchmail.org\"" "[reply-to]=\"test_suite+replyto@notmuchmail.org\"" "[body]=\"sexp-show-message\""
 output=$(notmuch show --format=sexp "sexp-show-message")
-test_expect_equal "$output" "((((:id \"${gen_msg_id}\" :match t :excluded nil :filename \"${gen_msg_filename}\" :timestamp 946728000 :date_relative \"2000-01-01\" :tags (\"inbox\" \"unread\") :headers (:Subject \"sexp-show-subject\" :From \"Notmuch Test Suite <test_suite@notmuchmail.org>\" :To \"Notmuch Test Suite <test_suite@notmuchmail.org>\" :Bcc \"test_suite+bcc@notmuchmail.org\" :Reply-To \"test_suite+replyto@notmuchmail.org\" :Date \"Sat, 01 Jan 2000 12:00:00 +0000\") :body ((:id 1 :content-type \"text/plain\" :content \"sexp-show-message\n\"))) ())))"
+test_expect_equal "$output" "((((:id \"${gen_msg_id}\" :match t :excluded nil :filename (\"${gen_msg_filename}\") :timestamp 946728000 :date_relative \"2000-01-01\" :tags (\"inbox\" \"unread\") :headers (:Subject \"sexp-show-subject\" :From \"Notmuch Test Suite <test_suite@notmuchmail.org>\" :To \"Notmuch Test Suite <test_suite@notmuchmail.org>\" :Bcc \"test_suite+bcc@notmuchmail.org\" :Reply-To \"test_suite+replyto@notmuchmail.org\" :Date \"Sat, 01 Jan 2000 12:00:00 +0000\") :body ((:id 1 :content-type \"text/plain\" :content \"sexp-show-message\n\"))) ())))"
 
 # This should be the same output as above.
 test_begin_subtest "Show message: sexp --body=true"
 output=$(notmuch show --format=sexp --body=true "sexp-show-message")
-test_expect_equal "$output" "((((:id \"${gen_msg_id}\" :match t :excluded nil :filename \"${gen_msg_filename}\" :timestamp 946728000 :date_relative \"2000-01-01\" :tags (\"inbox\" \"unread\") :headers (:Subject \"sexp-show-subject\" :From \"Notmuch Test Suite <test_suite@notmuchmail.org>\" :To \"Notmuch Test Suite <test_suite@notmuchmail.org>\" :Bcc \"test_suite+bcc@notmuchmail.org\" :Reply-To \"test_suite+replyto@notmuchmail.org\" :Date \"Sat, 01 Jan 2000 12:00:00 +0000\") :body ((:id 1 :content-type \"text/plain\" :content \"sexp-show-message\n\"))) ())))"
+test_expect_equal "$output" "((((:id \"${gen_msg_id}\" :match t :excluded nil :filename (\"${gen_msg_filename}\") :timestamp 946728000 :date_relative \"2000-01-01\" :tags (\"inbox\" \"unread\") :headers (:Subject \"sexp-show-subject\" :From \"Notmuch Test Suite <test_suite@notmuchmail.org>\" :To \"Notmuch Test Suite <test_suite@notmuchmail.org>\" :Bcc \"test_suite+bcc@notmuchmail.org\" :Reply-To \"test_suite+replyto@notmuchmail.org\" :Date \"Sat, 01 Jan 2000 12:00:00 +0000\") :body ((:id 1 :content-type \"text/plain\" :content \"sexp-show-message\n\"))) ())))"
 
 test_begin_subtest "Show message: sexp --body=false"
 output=$(notmuch show --format=sexp --body=false "sexp-show-message")
-test_expect_equal "$output" "((((:id \"${gen_msg_id}\" :match t :excluded nil :filename \"${gen_msg_filename}\" :timestamp 946728000 :date_relative \"2000-01-01\" :tags (\"inbox\" \"unread\") :headers (:Subject \"sexp-show-subject\" :From \"Notmuch Test Suite <test_suite@notmuchmail.org>\" :To \"Notmuch Test Suite <test_suite@notmuchmail.org>\" :Bcc \"test_suite+bcc@notmuchmail.org\" :Reply-To \"test_suite+replyto@notmuchmail.org\" :Date \"Sat, 01 Jan 2000 12:00:00 +0000\")) ())))"
+test_expect_equal "$output" "((((:id \"${gen_msg_id}\" :match t :excluded nil :filename (\"${gen_msg_filename}\") :timestamp 946728000 :date_relative \"2000-01-01\" :tags (\"inbox\" \"unread\") :headers (:Subject \"sexp-show-subject\" :From \"Notmuch Test Suite <test_suite@notmuchmail.org>\" :To \"Notmuch Test Suite <test_suite@notmuchmail.org>\" :Bcc \"test_suite+bcc@notmuchmail.org\" :Reply-To \"test_suite+replyto@notmuchmail.org\" :Date \"Sat, 01 Jan 2000 12:00:00 +0000\")) ())))"
 
 test_begin_subtest "Search message: sexp"
 add_message "[subject]=\"sexp-search-subject\"" "[date]=\"Sat, 01 Jan 2000 12:00:00 -0000\"" "[body]=\"sexp-search-message\""
@@ -24,7 +24,7 @@ test_expect_equal "$output" "((:thread \"0000000000000002\" :timestamp 946728000
 test_begin_subtest "Show message: sexp, utf-8"
 add_message "[subject]=\"sexp-show-utf8-body-sübjéct\"" "[date]=\"Sat, 01 Jan 2000 12:00:00 -0000\"" "[body]=\"jsön-show-méssage\""
 output=$(notmuch show --format=sexp "jsön-show-méssage")
-test_expect_equal "$output" "((((:id \"${gen_msg_id}\" :match t :excluded nil :filename \"${gen_msg_filename}\" :timestamp 946728000 :date_relative \"2000-01-01\" :tags (\"inbox\" \"unread\") :headers (:Subject \"sexp-show-utf8-body-sübjéct\" :From \"Notmuch Test Suite <test_suite@notmuchmail.org>\" :To \"Notmuch Test Suite <test_suite@notmuchmail.org>\" :Date \"Sat, 01 Jan 2000 12:00:00 +0000\") :body ((:id 1 :content-type \"text/plain\" :content \"jsön-show-méssage\n\"))) ())))"
+test_expect_equal "$output" "((((:id \"${gen_msg_id}\" :match t :excluded nil :filename (\"${gen_msg_filename}\") :timestamp 946728000 :date_relative \"2000-01-01\" :tags (\"inbox\" \"unread\") :headers (:Subject \"sexp-show-utf8-body-sübjéct\" :From \"Notmuch Test Suite <test_suite@notmuchmail.org>\" :To \"Notmuch Test Suite <test_suite@notmuchmail.org>\" :Date \"Sat, 01 Jan 2000 12:00:00 +0000\") :body ((:id 1 :content-type \"text/plain\" :content \"jsön-show-méssage\n\"))) ())))"
 
 test_begin_subtest "Show message: sexp, inline attachment filename"
 subject='sexp-show-inline-attachment-filename'
@@ -39,7 +39,7 @@ output=$(notmuch show --format=sexp "id:$id")
 filename=$(notmuch search --output=files "id:$id")
 # Get length of README after base64-encoding, minus additional newline.
 attachment_length=$(( $(base64 $TEST_DIRECTORY/README | wc -c) - 1 ))
-test_expect_equal "$output" "((((:id \"$id\" :match t :excluded nil :filename \"$filename\" :timestamp 946728000 :date_relative \"2000-01-01\" :tags (\"inbox\") :headers (:Subject \"sexp-show-inline-attachment-filename\" :From \"Notmuch Test Suite <test_suite@notmuchmail.org>\" :To \"test_suite@notmuchmail.org\" :Date \"Sat, 01 Jan 2000 12:00:00 +0000\") :body ((:id 1 :content-type \"multipart/mixed\" :content ((:id 2 :content-type \"text/plain\" :content \"This is a test message with inline attachment with a filename\") (:id 3 :content-type \"application/octet-stream\" :filename \"README\" :content-transfer-encoding \"base64\" :content-length $attachment_length))))) ())))"
+test_expect_equal "$output" "((((:id \"$id\" :match t :excluded nil :filename (\"$filename\") :timestamp 946728000 :date_relative \"2000-01-01\" :tags (\"inbox\") :headers (:Subject \"sexp-show-inline-attachment-filename\" :From \"Notmuch Test Suite <test_suite@notmuchmail.org>\" :To \"test_suite@notmuchmail.org\" :Date \"Sat, 01 Jan 2000 12:00:00 +0000\") :body ((:id 1 :content-type \"multipart/mixed\" :content ((:id 2 :content-type \"text/plain\" :content \"This is a test message with inline attachment with a filename\") (:id 3 :content-type \"application/octet-stream\" :filename \"README\" :content-transfer-encoding \"base64\" :content-length $attachment_length))))) ())))"
 
 test_begin_subtest "Search message: sexp, utf-8"
 add_message "[subject]=\"sexp-search-utf8-body-sübjéct\"" "[date]=\"Sat, 01 Jan 2000 12:00:00 -0000\"" "[body]=\"jsön-search-méssage\""
diff --git a/test/T190-multipart.sh b/test/T190-multipart.sh
index 35678909..18eb7b83 100755
--- a/test/T190-multipart.sh
+++ b/test/T190-multipart.sh
@@ -345,7 +345,7 @@ test_expect_success \
 test_begin_subtest "--format=json --part=0, full message"
 notmuch show --format=json --part=0 'id:87liy5ap00.fsf@yoom.home.cworth.org' >OUTPUT
 cat <<EOF >EXPECTED
-{"id": "87liy5ap00.fsf@yoom.home.cworth.org", "match": true, "excluded": false, "filename": "${MAIL_DIR}/multipart", "timestamp": 978709437, "date_relative": "2001-01-05", "tags": ["attachment","inbox","signed","unread"], "headers": {"Subject": "Multipart message", "From": "Carl Worth <cworth@cworth.org>", "To": "cworth@cworth.org", "Date": "Fri, 05 Jan 2001 15:43:57 +0000"}, "body": [
+{"id": "87liy5ap00.fsf@yoom.home.cworth.org", "match": true, "excluded": false, "filename": ["${MAIL_DIR}/multipart"], "timestamp": 978709437, "date_relative": "2001-01-05", "tags": ["attachment","inbox","signed","unread"], "headers": {"Subject": "Multipart message", "From": "Carl Worth <cworth@cworth.org>", "To": "cworth@cworth.org", "Date": "Fri, 05 Jan 2001 15:43:57 +0000"}, "body": [
 {"id": 1, "content-type": "multipart/signed", "content": [
 {"id": 2, "content-type": "multipart/mixed", "content": [
 {"id": 3, "content-type": "message/rfc822", "content": [{"headers": {"Subject": "html message", "From": "Carl Worth <cworth@cworth.org>", "To": "cworth@cworth.org", "Date": "Fri, 05 Jan 2001 15:42:57 +0000"}, "body": [
@@ -627,7 +627,7 @@ notmuch_json_show_sanitize <<EOF >EXPECTED
  "original": {"id": "XXXXX",
  "match": false,
  "excluded": false,
- "filename": "YYYYY",
+ "filename": ["YYYYY"],
  "timestamp": 978709437,
  "date_relative": "2001-01-05",
  "tags": ["attachment","inbox","signed","unread"],
@@ -715,7 +715,7 @@ cat_expected_head ()
         cat <<EOF
 [[[{"id": "htmlmessage", "match":true, "excluded": false, "date_relative":"2000-01-01",
    "timestamp": 946684800,
-   "filename": "${MAIL_DIR}/include-html",
+   "filename": ["${MAIL_DIR}/include-html"],
    "tags": ["inbox", "unread"],
    "headers": { "Date": "Sat, 01 Jan 2000 00:00:00 +0000", "From": "A <a@example.com>",
                 "Subject": "html message", "To": "B <b@example.com>"},
diff --git a/test/T220-reply.sh b/test/T220-reply.sh
index 818a8654..17741e0d 100755
--- a/test/T220-reply.sh
+++ b/test/T220-reply.sh
@@ -229,7 +229,7 @@ test_expect_equal_json "$output" '
         ],
         "date_relative": "2010-01-05",
         "excluded": false,
-        "filename": "'${MAIL_DIR}'/msg-012",
+        "filename": ["'${MAIL_DIR}'/msg-012"],
         "headers": {
             "Date": "Tue, 05 Jan 2010 15:43:56 +0000",
             "From": "\u2603 <snowman@example.com>",
diff --git a/test/T340-maildir-sync.sh b/test/T340-maildir-sync.sh
index efeaa3f6..b474bf46 100755
--- a/test/T340-maildir-sync.sh
+++ b/test/T340-maildir-sync.sh
@@ -39,7 +39,7 @@ output=$(notmuch show --format=json id:${gen_msg_id} | notmuch_json_show_sanitiz
 test_expect_equal_json "$output" '[[[{"id": "XXXXX",
 "match": true,
 "excluded": false,
-"filename": "YYYYY",
+"filename": ["YYYYY"],
 "timestamp": 42,
 "date_relative": "2001-01-05",
 "tags": ["inbox","replied"],
diff --git a/test/T350-crypto.sh b/test/T350-crypto.sh
index a1e5e206..14b215a3 100755
--- a/test/T350-crypto.sh
+++ b/test/T350-crypto.sh
@@ -41,7 +41,7 @@ output=$(notmuch show --format=json --verify subject:"test signed message 001" \
 expected='[[[{"id": "XXXXX",
  "match": true,
  "excluded": false,
- "filename": "YYYYY",
+ "filename": ["YYYYY"],
  "timestamp": 946728000,
  "date_relative": "2000-01-01",
  "tags": ["inbox","signed"],
@@ -75,7 +75,7 @@ output=$(notmuch show --format=json --verify subject:"test signed message 001" \
 expected='[[[{"id": "XXXXX",
  "match": true,
  "excluded": false,
- "filename": "YYYYY",
+ "filename": ["YYYYY"],
  "timestamp": 946728000,
  "date_relative": "2000-01-01",
  "tags": ["inbox","signed"],
@@ -109,7 +109,7 @@ output=$(notmuch show --format=json --verify subject:"test signed message 001" \
 expected='[[[{"id": "XXXXX",
  "match": true,
  "excluded": false,
- "filename": "YYYYY",
+ "filename": ["YYYYY"],
  "timestamp": 946728000,
  "date_relative": "2000-01-01",
  "tags": ["inbox","signed"],
@@ -183,7 +183,7 @@ output=$(notmuch show --format=json --decrypt subject:"test encrypted message 00
 expected='[[[{"id": "XXXXX",
  "match": true,
  "excluded": false,
- "filename": "YYYYY",
+ "filename": ["YYYYY"],
  "timestamp": 946728000,
  "date_relative": "2000-01-01",
  "tags": ["encrypted","inbox"],
@@ -240,7 +240,7 @@ output=$(notmuch show --format=json --decrypt subject:"test encrypted message 00
 expected='[[[{"id": "XXXXX",
  "match": true,
  "excluded": false,
- "filename": "YYYYY",
+ "filename": ["YYYYY"],
  "timestamp": 946728000,
  "date_relative": "2000-01-01",
  "tags": ["encrypted","inbox"],
@@ -276,7 +276,7 @@ output=$(notmuch show --format=json --decrypt subject:"test encrypted message 00
 expected='[[[{"id": "XXXXX",
  "match": true,
  "excluded": false,
- "filename": "YYYYY",
+ "filename": ["YYYYY"],
  "timestamp": 946728000,
  "date_relative": "2000-01-01",
  "tags": ["encrypted","inbox"],
@@ -350,7 +350,7 @@ output=$(notmuch show --format=json --verify subject:"test signed message 001" \
 expected='[[[{"id": "XXXXX",
  "match": true,
  "excluded": false,
- "filename": "YYYYY",
+ "filename": ["YYYYY"],
  "timestamp": 946728000,
  "date_relative": "2000-01-01",
  "tags": ["inbox","signed"],
diff --git a/test/T355-smime.sh b/test/T355-smime.sh
index a8be45e7..a6db4a18 100755
--- a/test/T355-smime.sh
+++ b/test/T355-smime.sh
@@ -51,7 +51,7 @@ output=$(notmuch show --format=json --verify subject:"test signed message 001" \
 expected='[[[{"id": "XXXXX",
  "match": true,
  "excluded": false,
- "filename": "YYYYY",
+ "filename": ["YYYYY"],
  "timestamp": 946728000,
  "date_relative": "2000-01-01",
  "tags": ["inbox","signed"],
diff --git a/test/T470-missing-headers.sh b/test/T470-missing-headers.sh
index 256a885f..32031e31 100755
--- a/test/T470-missing-headers.sh
+++ b/test/T470-missing-headers.sh
@@ -109,7 +109,7 @@ expected=$(notmuch_json_show_sanitize <<EOF
                 ],
                 "date_relative": "2001-01-05",
                 "excluded": false,
-                "filename": "YYYYY",
+                "filename": ["YYYYY"],
                 "headers": {
                     "Date": "Fri, 05 Jan 2001 15:43:57 +0000",
                     "From": "",
@@ -139,7 +139,7 @@ expected=$(notmuch_json_show_sanitize <<EOF
                 ],
                 "date_relative": "1970-01-01",
                 "excluded": false,
-                "filename": "YYYYY",
+                "filename": ["YYYYY"],
                 "headers": {
                     "Date": "Thu, 01 Jan 1970 00:00:00 +0000",
                     "From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
diff --git a/test/T510-thread-replies.sh b/test/T510-thread-replies.sh
index 5ab066ac..fa288bb1 100755
--- a/test/T510-thread-replies.sh
+++ b/test/T510-thread-replies.sh
@@ -21,7 +21,7 @@ output=$(notmuch show --format=json 'subject:one' | notmuch_json_show_sanitize)
 expected='[[[{"id": "foo@one.com",
  "match": true,
  "excluded": false,
- "filename": "YYYYY",
+ "filename": ["YYYYY"],
  "timestamp": 978709437,
  "date_relative": "2001-01-05",
  "tags": ["inbox", "unread"],
@@ -34,7 +34,7 @@ expected='[[[{"id": "foo@one.com",
  "content": "This is just a test message (#1)\n"}]},
  [[{"id": "msg-002@notmuch-test-suite",
  "match": true, "excluded": false,
- "filename": "YYYYY",
+ "filename": ["YYYYY"],
  "timestamp": 978709437, "date_relative": "2001-01-05",
  "tags": ["inbox", "unread"], "headers": {"Subject": "Re: one",
  "From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
@@ -54,7 +54,7 @@ add_message '[in-reply-to]="<bar@baz.com>"' \
 output=$(notmuch show --format=json 'subject:two' | notmuch_json_show_sanitize)
 expected='[[[{"id": "foo@two.com",
  "match": true, "excluded": false,
- "filename": "YYYYY",
+ "filename": ["YYYYY"],
  "timestamp": 978709437, "date_relative": "2001-01-05", "tags": ["inbox", "unread"],
  "headers": {"Subject": "two",
  "From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
@@ -63,7 +63,7 @@ expected='[[[{"id": "foo@two.com",
  "body": [{"id": 1, "content-type": "text/plain",
  "content": "This is just a test message (#3)\n"}]},
  [[{"id": "msg-004@notmuch-test-suite", "match": true, "excluded": false,
- "filename": "YYYYY",
+ "filename": ["YYYYY"],
  "timestamp": 978709437, "date_relative": "2001-01-05", "tags": ["inbox", "unread"],
  "headers": {"Subject": "Re: two",
  "From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
@@ -82,7 +82,7 @@ add_message '[in-reply-to]="<foo@three.com>"' \
     '[subject]="Re: three"'
 output=$(notmuch show --format=json 'subject:three' | notmuch_json_show_sanitize)
 expected='[[[{"id": "foo@three.com", "match": true, "excluded": false,
- "filename": "YYYYY",
+ "filename": ["YYYYY"],
  "timestamp": 978709437, "date_relative": "2001-01-05", "tags": ["inbox", "unread"],
  "headers": {"Subject": "three",
  "From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
@@ -90,7 +90,7 @@ expected='[[[{"id": "foo@three.com", "match": true, "excluded": false,
  "Date": "Fri, 05 Jan 2001 15:43:57 +0000"}, "body": [{"id": 1,
  "content-type": "text/plain", "content": "This is just a test message (#5)\n"}]},
  [[{"id": "msg-006@notmuch-test-suite", "match": true, "excluded": false,
- "filename": "YYYYY",
+ "filename": ["YYYYY"],
  "timestamp": 978709437, "date_relative": "2001-01-05", "tags": ["inbox", "unread"],
  "headers": {"Subject": "Re: three",
  "From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
@@ -111,7 +111,7 @@ add_message '[in-reply-to]="<baz@four.com>"' \
     '[subject]="neither"'
 output=$(notmuch show --format=json 'subject:four' | notmuch_json_show_sanitize)
 expected='[[[{"id": "foo@four.com", "match": true, "excluded": false,
- "filename": "YYYYY",
+ "filename": ["YYYYY"],
  "timestamp": 978709437, "date_relative": "2001-01-05", "tags": ["inbox", "unread"],
  "headers": {"Subject": "four",
  "From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
@@ -119,7 +119,7 @@ expected='[[[{"id": "foo@four.com", "match": true, "excluded": false,
  "Date": "Fri, 05 Jan 2001 15:43:57 +0000"}, "body": [{"id": 1,
  "content-type": "text/plain", "content": "This is just a test message (#7)\n"}]},
  [[{"id": "msg-009@notmuch-test-suite", "match": false, "excluded": false,
- "filename": "YYYYY",
+ "filename": ["YYYYY"],
  "timestamp": 978709437, "date_relative": "2001-01-05", "tags": ["inbox", "unread"],
  "headers": {"Subject": "neither",
  "From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
@@ -127,7 +127,7 @@ expected='[[[{"id": "foo@four.com", "match": true, "excluded": false,
  "Date": "Fri, 05 Jan 2001 15:43:57 +0000"}, "body": [{"id": 1,
  "content-type": "text/plain", "content": "This is just a test message (#9)\n"}]},
  []]]]], [[{"id": "bar@four.com", "match": true, "excluded": false,
- "filename": "YYYYY",
+ "filename": ["YYYYY"],
  "timestamp": 978709437, "date_relative": "2001-01-05", "tags": ["inbox", "unread"],
  "headers": {"Subject": "not-four",
  "From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
@@ -145,7 +145,7 @@ add_message '[id]="bar@five.com"' \
     '[subject]="not-five"'
 output=$(notmuch show --format=json 'subject:five' | notmuch_json_show_sanitize)
 expected='[[[{"id": "XXXXX", "match": true, "excluded": false,
- "filename": "YYYYY", "timestamp": 42, "date_relative": "2001-01-05",
+ "filename": ["YYYYY"], "timestamp": 42, "date_relative": "2001-01-05",
  "tags": ["inbox", "unread"], "headers": {"Subject": "five",
  "From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
  "To": "Notmuch Test Suite <test_suite@notmuchmail.org>",
@@ -153,7 +153,7 @@ expected='[[[{"id": "XXXXX", "match": true, "excluded": false,
  "content-type": "text/plain",
  "content": "This is just a test message (#10)\n"}]},
  [[{"id": "XXXXX", "match": true, "excluded": false,
- "filename": "YYYYY", "timestamp": 42, "date_relative": "2001-01-05",
+ "filename": ["YYYYY"], "timestamp": 42, "date_relative": "2001-01-05",
  "tags": ["inbox", "unread"],
  "headers": {"Subject": "not-five",
  "From": "Notmuch Test Suite <test_suite@notmuchmail.org>",
diff --git a/test/test-lib.sh b/test/test-lib.sh
index bb32e97b..d8e15943 100644
--- a/test/test-lib.sh
+++ b/test/test-lib.sh
@@ -745,7 +745,7 @@ notmuch_json_show_sanitize ()
 	-e 's|"id": "[^"]*",|"id": "XXXXX",|g' \
 	-e 's|"Date": "Fri, 05 Jan 2001 [^"]*0000"|"Date": "GENERATED_DATE"|g' \
 	-e 's|"filename": "signature.asc",||g' \
-	-e 's|"filename": "/[^"]*",|"filename": "YYYYY",|g' \
+	-e 's|"filename": \["/[^"]*"\],|"filename": \["YYYYY"\],|g' \
 	-e 's|"timestamp": 97.......|"timestamp": 42|g' \
         -e 's|"content-length": [1-9][0-9]*|"content-length": "NONZERO"|g'
 }