[PATCH 4/8] resolve-undo.c: dump "REUC" extension as json

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 read-cache.c   |  2 +-
 resolve-undo.c | 36 +++++++++++++++++++++++++++++++++++-
 resolve-undo.h |  4 +++-
 3 files changed, 39 insertions(+), 3 deletions(-)

diff --git a/read-cache.c b/read-cache.c
index eec030b3bb..3b5c63f53a 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -1701,7 +1701,7 @@ static int read_index_extension(struct index_state *istate,
 		istate->cache_tree = cache_tree_read(data, sz);
 		break;
 	case CACHE_EXT_RESOLVE_UNDO:
-		istate->resolve_undo = resolve_undo_read(data, sz);
+		istate->resolve_undo = resolve_undo_read(data, sz, istate->jw);
 		break;
 	case CACHE_EXT_LINK:
 		if (read_link_extension(istate, data, sz))
diff --git a/resolve-undo.c b/resolve-undo.c
index 236320f179..999020bc40 100644
--- a/resolve-undo.c
+++ b/resolve-undo.c
@@ -1,5 +1,6 @@
 #include "cache.h"
 #include "dir.h"
+#include "json-writer.h"
 #include "resolve-undo.h"
 #include "string-list.h"
 
@@ -49,7 +50,8 @@ void resolve_undo_write(struct strbuf *sb, struct string_list *resolve_undo)
 	}
 }
 
-struct string_list *resolve_undo_read(const char *data, unsigned long size)
+struct string_list *resolve_undo_read(const char *data, unsigned long size,
+				      struct json_writer *jw)
 {
 	struct string_list *resolve_undo;
 	size_t len;
@@ -59,6 +61,11 @@ struct string_list *resolve_undo_read(const char *data, unsigned long size)
 
 	resolve_undo = xcalloc(1, sizeof(*resolve_undo));
 	resolve_undo->strdup_strings = 1;
+	if (jw) {
+		jw_object_inline_begin_object(jw, "resolve-undo");
+		jw_object_intmax(jw, "ext-size", size);
+		jw_object_inline_begin_array(jw, "entries");
+	}
 
 	while (size) {
 		struct string_list_item *lost;
@@ -94,6 +101,33 @@ struct string_list *resolve_undo_read(const char *data, unsigned long size)
 			size -= rawsz;
 			data += rawsz;
 		}
+
+		if (jw) {
+			struct strbuf sb = STRBUF_INIT;
+
+			jw_array_inline_begin_object(jw);
+			jw_object_string(jw, "path", lost->string);
+
+			jw_object_inline_begin_array(jw, "mode");
+			for (i = 0; i < 3; i++) {
+				strbuf_addf(&sb, "%06o", ui->mode[i]);
+				jw_array_string(jw, sb.buf);
+				strbuf_reset(&sb);
+			}
+			jw_end(jw);
+
+			jw_object_inline_begin_array(jw, "oid");
+			for (i = 0; i < 3; i++)
+				jw_array_string(jw, oid_to_hex(&ui->oid[i]));
+			jw_end(jw);
+
+			jw_end(jw);
+			strbuf_release(&sb);
+		}
+	}
+	if (jw) {
+		jw_end(jw);	/* entries */
+		jw_end(jw);	/* resolve-undo */
 	}
 	return resolve_undo;
 
diff --git a/resolve-undo.h b/resolve-undo.h
index 2b3f0f901e..46b4e93a7e 100644
--- a/resolve-undo.h
+++ b/resolve-undo.h
@@ -3,6 +3,8 @@
 
 #include "cache.h"
 
+struct json_writer;
+
 struct resolve_undo_info {
 	unsigned int mode[3];
 	struct object_id oid[3];
@@ -10,7 +12,7 @@ struct resolve_undo_info {
 
 void record_resolve_undo(struct index_state *, struct cache_entry *);
 void resolve_undo_write(struct strbuf *, struct string_list *);
-struct string_list *resolve_undo_read(const char *, unsigned long);
+struct string_list *resolve_undo_read(const char *, unsigned long, struct json_writer *);
 void resolve_undo_clear_index(struct index_state *);
 int unmerge_index_entry_at(struct index_state *, int);
 void unmerge_index(struct index_state *, const struct pathspec *);
-- 
2.22.0.rc0.322.g2b0371e29a