revision.c: add show_object_with_name() helper function

[thirdparty/git.git] / revision.c

diff --git a/revision.c b/revision.c
index c46cfaa3e4d2f06fd67ccd71c7ba47891796fd60..c5b38cc1174356c15d6b544ab8eab4391a4621a7 100644 (file)
--- a/revision.c
+++ b/revision.c
@@ -40,6 +40,25 @@ char *path_name(const struct name_path *path, const char *name)
        return n;
 }
 
+void show_object_with_name(FILE *out, struct object *obj, const struct name_path *path, const char *component)
+{
+       char *name = path_name(path, component);
+       const char *ep = strchr(name, '\n');
+
+       /*
+        * An object with name "foo\n0000000..." can be used to
+        * confuse downstream "git pack-objects" very badly.
+        */
+       if (ep) {
+               fprintf(out, "%s %.*s\n", sha1_to_hex(obj->sha1),
+                       (int) (ep - name),
+                       name);
+       }
+       else
+               fprintf(out, "%s %s\n", sha1_to_hex(obj->sha1), name);
+       free(name);
+}
+
 void add_object(struct object *obj,
                struct object_array *p,
                struct name_path *path,