[PATCH 1/2] [GSOC] ref-filter: add obj-type check in grab contents

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From: ZheNing Hu <adlternative@xxxxxxxxx>

Only tag and commit objects use `grab_sub_body_contents()` to grab
object contents in the current codebase.  We want to teach the
function to also handle blobs and trees to get their raw data,
without parsing a blob (whose contents looks like a commit or a tag)
incorrectly as a commit or a tag.

Skip the block of code that is specific to handling commits and tags
early when the given object is of a wrong type to help later
addition to handle other types of objects in this function.

Mentored-by: Christian Couder <christian.couder@xxxxxxxxx>
Mentored-by: Hariom Verma <hariom18599@xxxxxxxxx>
Helped-by: Junio C Hamano <gitster@xxxxxxxxx>
Signed-off-by: ZheNing Hu <adlternative@xxxxxxxxx>
---
 ref-filter.c | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/ref-filter.c b/ref-filter.c
index 4db0e40ff4c6..c0334857653a 100644
--- a/ref-filter.c
+++ b/ref-filter.c
@@ -1356,7 +1356,8 @@ static void append_lines(struct strbuf *out, const char *buf, unsigned long size
 }
 
 /* See grab_values */
-static void grab_sub_body_contents(struct atom_value *val, int deref, void *buf)
+static void grab_sub_body_contents(struct atom_value *val, int deref, void *buf,
+				   struct object *obj)
 {
 	int i;
 	const char *subpos = NULL, *bodypos = NULL, *sigpos = NULL;
@@ -1371,10 +1372,13 @@ static void grab_sub_body_contents(struct atom_value *val, int deref, void *buf)
 			continue;
 		if (deref)
 			name++;
-		if (strcmp(name, "body") &&
-		    !starts_with(name, "subject") &&
-		    !starts_with(name, "trailers") &&
-		    !starts_with(name, "contents"))
+
+		if ((obj->type != OBJ_TAG &&
+		     obj->type != OBJ_COMMIT) ||
+		    (strcmp(name, "body") &&
+		     !starts_with(name, "subject") &&
+		     !starts_with(name, "trailers") &&
+		     !starts_with(name, "contents")))
 			continue;
 		if (!subpos)
 			find_subpos(buf,
@@ -1443,12 +1447,12 @@ static void grab_values(struct atom_value *val, int deref, struct object *obj, v
 	switch (obj->type) {
 	case OBJ_TAG:
 		grab_tag_values(val, deref, obj);
-		grab_sub_body_contents(val, deref, buf);
+		grab_sub_body_contents(val, deref, buf, obj);
 		grab_person("tagger", val, deref, buf);
 		break;
 	case OBJ_COMMIT:
 		grab_commit_values(val, deref, obj);
-		grab_sub_body_contents(val, deref, buf);
+		grab_sub_body_contents(val, deref, buf, obj);
 		grab_person("author", val, deref, buf);
 		grab_person("committer", val, deref, buf);
 		break;
-- 
gitgitgadget




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