Merge branch 'ma/more-opaque-lock-file' into maint

Code clean-up.

* ma/more-opaque-lock-file:
  read-cache: try not to peek into `struct {lock_,temp}file`
  refs/files-backend: don't peek into `struct lock_file`
  midx: don't peek into `struct lock_file`
  commit-graph: don't peek into `struct lock_file`
  builtin/gc: don't peek into `struct lock_file`

builtin/gc.c

@@ -92,7 +92,7 @@ static void process_log_file(void)
 		 */
 		int saved_errno = errno;
 		fprintf(stderr, _("Failed to fstat %s: %s"),
-			get_tempfile_path(log_lock.tempfile),
+			get_lock_file_path(&log_lock),
 			strerror(saved_errno));
 		fflush(stderr);
 		commit_lock_file(&log_lock);
@@ -1518,7 +1518,7 @@ static int update_background_schedule(int run_maintenance)
 	strvec_split(&crontab_list.args, crontab_name);
 	strvec_push(&crontab_list.args, "-l");
 	crontab_list.in = -1;
-	crontab_list.out = dup(lk.tempfile->fd);
+	crontab_list.out = dup(get_lock_file_fd(&lk));
 	crontab_list.git_cmd = 0;
 
 	if (start_command(&crontab_list)) {
@@ -1533,7 +1533,7 @@ static int update_background_schedule(int run_maintenance)
 	 * Read from the .lock file, filtering out the old
 	 * schedule while appending the new schedule.
 	 */
-	cron_list = fdopen(lk.tempfile->fd, "r");
+	cron_list = fdopen(get_lock_file_fd(&lk), "r");
 	rewind(cron_list);
 
 	strvec_split(&crontab_edit.args, crontab_name);

commit-graph.c

@@ -1694,8 +1694,8 @@ static int write_commit_graph_file(struct write_commit_graph_context *ctx)
 	} else {
 		hold_lock_file_for_update_mode(&lk, ctx->graph_name,
 					       LOCK_DIE_ON_ERROR, 0444);
-		fd = lk.tempfile->fd;
-		f = hashfd(lk.tempfile->fd, lk.tempfile->filename.buf);
+		fd = get_lock_file_fd(&lk);
+		f = hashfd(fd, get_lock_file_path(&lk));
 	}
 
 	chunks[0].id = GRAPH_CHUNKID_OIDFANOUT;
@@ -1833,7 +1833,7 @@ static int write_commit_graph_file(struct write_commit_graph_context *ctx)
 		result = rename(ctx->graph_name, final_graph_name);
 
 		for (i = 0; i < ctx->num_commit_graphs_after; i++)
-			fprintf(lk.tempfile->fp, "%s\n", ctx->commit_graph_hash_after[i]);
+			fprintf(get_lock_file_fp(&lk), "%s\n", ctx->commit_graph_hash_after[i]);
 
 		if (result) {
 			error(_("failed to rename temporary commit-graph file"));

midx.c

@@ -918,7 +918,7 @@ static int write_midx_internal(const char *object_dir, struct multi_pack_index *
 					(pack_name_concat_len % MIDX_CHUNK_ALIGNMENT);
 
 	hold_lock_file_for_update(&lk, midx_name, LOCK_DIE_ON_ERROR);
-	f = hashfd(lk.tempfile->fd, lk.tempfile->filename.buf);
+	f = hashfd(get_lock_file_fd(&lk), get_lock_file_path(&lk));
 	FREE_AND_NULL(midx_name);
 
 	if (packs.m)

read-cache.c

@@ -3014,10 +3014,10 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile,
 	if (ce_flush(&c, newfd, istate->oid.hash))
 		return -1;
 	if (close_tempfile_gently(tempfile)) {
-		error(_("could not close '%s'"), tempfile->filename.buf);
+		error(_("could not close '%s'"), get_tempfile_path(tempfile));
 		return -1;
 	}
-	if (stat(tempfile->filename.buf, &st))
+	if (stat(get_tempfile_path(tempfile), &st))
 		return -1;
 	istate->timestamp.sec = (unsigned int)st.st_mtime;
 	istate->timestamp.nsec = ST_MTIME_NSEC(st);
@@ -3058,10 +3058,10 @@ static int do_write_locked_index(struct index_state *istate, struct lock_file *l
 	 * that is associated with the given "istate".
 	 */
 	trace2_region_enter_printf("index", "do_write_index", the_repository,
-				   "%s", lock->tempfile->filename.buf);
+				   "%s", get_lock_file_path(lock));
 	ret = do_write_index(istate, lock->tempfile, 0);
 	trace2_region_leave_printf("index", "do_write_index", the_repository,
-				   "%s", lock->tempfile->filename.buf);
+				   "%s", get_lock_file_path(lock));
 
 	if (ret)
 		return ret;
@@ -3158,10 +3158,10 @@ static int write_shared_index(struct index_state *istate,
 	move_cache_to_base_index(istate);
 
 	trace2_region_enter_printf("index", "shared/do_write_index",
-				   the_repository, "%s", (*temp)->filename.buf);
+				   the_repository, "%s", get_tempfile_path(*temp));
 	ret = do_write_index(si->base, *temp, 1);
 	trace2_region_leave_printf("index", "shared/do_write_index",
-				   the_repository, "%s", (*temp)->filename.buf);
+				   the_repository, "%s", get_tempfile_path(*temp));
 
 	if (ret)
 		return ret;

refs/files-backend.c

@@ -1824,12 +1824,12 @@ static int create_symref_locked(struct files_ref_store *refs,
 
 	if (!fdopen_lock_file(&lock->lk, "w"))
 		return error("unable to fdopen %s: %s",
-			     lock->lk.tempfile->filename.buf, strerror(errno));
+			     get_lock_file_path(&lock->lk), strerror(errno));
 
 	update_symref_reflog(refs, lock, refname, target, logmsg);
 
 	/* no error check; commit_ref will check ferror */
-	fprintf(lock->lk.tempfile->fp, "ref: %s\n", target);
+	fprintf(get_lock_file_fp(&lock->lk), "ref: %s\n", target);
 	if (commit_ref(lock) < 0)
 		return error("unable to write symref for %s: %s", refname,
 			     strerror(errno));