editor: do not rely on the_repository for interactive edits

We implicitly rely on `the_repository` when editing a file interactively
because we call `git_path()`. Adapt the function to instead take a
`struct repository` as a parameter so that we can remove this hidden
dependency.

Signed-off-by: Patrick Steinhardt <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: pks-t

add-patch.c

@@ -1140,7 +1140,8 @@ static int edit_hunk_manually(struct add_p_state *s, struct hunk *hunk)
 				"removed, then the edit is\n"
 				"aborted and the hunk is left unchanged.\n"));
 
-	if (strbuf_edit_interactively(&s->buf, "addp-hunk-edit.diff", NULL) < 0)
+	if (strbuf_edit_interactively(the_repository, &s->buf,
+				      "addp-hunk-edit.diff", NULL) < 0)
 		return -1;
 
 	/* strip out commented lines */

editor.c

@@ -133,14 +133,17 @@ int launch_sequence_editor(const char *path, struct strbuf *buffer,
 	return launch_specified_editor(git_sequence_editor(), path, buffer, env);
 }
 
-int strbuf_edit_interactively(struct strbuf *buffer, const char *path,
+int strbuf_edit_interactively(struct repository *r,
+			      struct strbuf *buffer, const char *path,
 			      const char *const *env)
 {
-	char *path2 = NULL;
+	struct strbuf sb = STRBUF_INIT;
 	int fd, res = 0;
 
-	if (!is_absolute_path(path))
-		path = path2 = xstrdup(git_path("%s", path));
+	if (!is_absolute_path(path)) {
+		strbuf_repo_git_path(&sb, r, "%s", path);
+		path = sb.buf;
+	}
 
 	fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0666);
 	if (fd < 0)
@@ -157,6 +160,6 @@ int strbuf_edit_interactively(struct strbuf *buffer, const char *path,
 		unlink(path);
 	}
 
-	free(path2);
+	strbuf_release(&sb);
 	return res;
 }

editor.h

@@ -1,6 +1,7 @@
 #ifndef EDITOR_H
 #define EDITOR_H
 
+struct repository;
 struct strbuf;
 
 const char *git_editor(void);
@@ -28,7 +29,7 @@ int launch_sequence_editor(const char *path, struct strbuf *buffer,
  *
  * If `path` is relative, it refers to a file in the `.git` directory.
  */
-int strbuf_edit_interactively(struct strbuf *buffer, const char *path,
-			      const char *const *env);
+int strbuf_edit_interactively(struct repository *r, struct strbuf *buffer,
+			      const char *path, const char *const *env);
 
 #endif