[PATCH v2 06/10] fsmonitor.c: dump "FSMN" extension as json

[Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
---
 fsmonitor.c              |  6 ++++++
 t/t3011-ls-files-json.sh | 14 +++++++++++++-
 t/t3011/fsmonitor (new)  | 38 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 57 insertions(+), 1 deletion(-)

diff --git a/fsmonitor.c b/fsmonitor.c
index 1dee0aded1..5ed55ad176 100644
--- a/fsmonitor.c
+++ b/fsmonitor.c
@@ -3,6 +3,7 @@
 #include "dir.h"
 #include "ewah/ewok.h"
 #include "fsmonitor.h"
+#include "json-writer.h"
 #include "run-command.h"
 #include "strbuf.h"
 
@@ -50,6 +51,11 @@ int read_fsmonitor_extension(struct index_state *istate, const void *data,
 	}
 	istate->fsmonitor_dirty = fsmonitor_dirty;
 
+	if (istate->jw) {
+		jw_object_intmax(istate->jw, "version", hdr_version);
+		jw_object_intmax(istate->jw, "last_update", istate->fsmonitor_last_update);
+		jw_object_ewah(istate->jw, "dirty", fsmonitor_dirty);
+	}
 	trace_printf_key(&trace_fsmonitor, "read fsmonitor extension successful");
 	return 0;
 }
diff --git a/t/t3011-ls-files-json.sh b/t/t3011-ls-files-json.sh
index dbb572ce9d..25215f83ae 100755
--- a/t/t3011-ls-files-json.sh
+++ b/t/t3011-ls-files-json.sh
@@ -36,7 +36,7 @@ test_expect_success 'setup' '
 	git add -N ita &&
 
 	strip_number ctime_sec ctime_nsec mtime_sec mtime_nsec &&
-	strip_number device inode uid gid file_offset ext_size &&
+	strip_number device inode uid gid file_offset ext_size last_update &&
 	strip_string oid ident
 '
 
@@ -58,4 +58,16 @@ test_expect_success 'ls-files --json, split index' '
 	)
 '
 
+test_expect_success 'ls-files --json, fsmonitor extension ' '
+	git init fsmonitor &&
+	(
+		cd fsmonitor &&
+		echo one >one &&
+		git add one &&
+		git update-index --fsmonitor &&
+		cp ../filter.sed . &&
+		compare_json fsmonitor
+	)
+'
+
 test_done
diff --git a/t/t3011/fsmonitor b/t/t3011/fsmonitor
new file mode 100644
index 0000000000..17f2d4a664
--- /dev/null
+++ b/t/t3011/fsmonitor
@@ -0,0 +1,38 @@
+{
+  "version": 2,
+  "oid": <string>,
+  "mtime_sec": <number>,
+  "mtime_nsec": <number>,
+  "entries": [
+    {
+      "id": 0,
+      "name": "one",
+      "mode": "100644",
+      "flags": 0,
+      "oid": <string>,
+      "stat": {
+        "ctime_sec": <number>,
+        "ctime_nsec": <number>,
+        "mtime_sec": <number>,
+        "mtime_nsec": <number>,
+        "device": <number>,
+        "inode": <number>,
+        "uid": <number>,
+        "gid": <number>,
+        "size": 4
+      },
+      "file_offset": <number>
+    }
+  ],
+  "extensions": {
+    "FSMN": {
+      "file_offset": <number>,
+      "ext_size": <number>,
+      "version": 1,
+      "last_update": <number>,
+      "dirty": [
+        0
+      ]
+    }
+  }
+}
-- 
2.22.0.rc0.322.g2b0371e29a