Merge branch 'long-paths'

Documentation/config/core.adoc

@@ -685,6 +685,19 @@ relatively high IO latencies.  When enabled, Git will do the
 index comparison to the filesystem data in parallel, allowing
 overlapping IO's.  Defaults to true.
 
+core.fscache::
+	Enable additional caching of file system data for some operations.
++
+Git for Windows uses this to bulk-read and cache lstat data of entire
+directories (instead of doing lstat file by file).
+
+core.longpaths::
+	Enable long path (> 260) support for builtin commands in Git for
+	Windows. This is disabled by default, as long paths are not supported
+	by Windows Explorer, cmd.exe and the Git for Windows tool chain
+	(msys, bash, tcl, perl...). Only enable this if you know what you're
+	doing and are prepared to live with a few quirks.
+
 core.unsetenvvars::
 	Windows-only: comma-separated list of environment variables'
 	names that need to be unset before spawning any other process.

builtin/add.c

@@ -477,6 +477,10 @@ int cmd_add(int argc,
 	die_in_unpopulated_submodule(repo->index, prefix);
 	die_path_inside_submodule(repo->index, &pathspec);
 
+	enable_fscache(0);
+	/* We do not really re-read the index but update the up-to-date flags */
+	preload_index(repo->index, &pathspec, 0);
+
 	if (add_new_files) {
 		int baselen;
 
@@ -589,5 +593,6 @@ int cmd_add(int argc,
 	free(ps_matched);
 	dir_clear(&dir);
 	clear_pathspec(&pathspec);
+	enable_fscache(0);
 	return exit_status;
 }

builtin/checkout.c

@@ -407,6 +407,7 @@ static int checkout_worktree(const struct checkout_opts *opts,
 	if (pc_workers > 1)
 		init_parallel_checkout();
 
+	enable_fscache(the_repository->index->cache_nr);
 	for (pos = 0; pos < the_repository->index->cache_nr; pos++) {
 		struct cache_entry *ce = the_repository->index->cache[pos];
 		if (ce->ce_flags & CE_MATCHED) {
@@ -432,6 +433,7 @@ static int checkout_worktree(const struct checkout_opts *opts,
 		errs |= run_parallel_checkout(&state, pc_workers, pc_threshold,
 					      NULL, NULL);
 	mem_pool_discard(&ce_mem_pool, should_validate_cache_entries());
+	disable_fscache();
 	remove_marked_cache_entries(the_repository->index, 1);
 	remove_scheduled_dirs();
 	errs |= finish_delayed_checkout(&state, opts->show_progress);

builtin/clean.c

@@ -1043,6 +1043,7 @@ int cmd_clean(int argc,
 
 	if (repo_read_index(the_repository) < 0)
 		die(_("index file corrupt"));
+	enable_fscache(the_repository->index->cache_nr);
 
 	pl = add_pattern_list(&dir, EXC_CMDL, "--exclude option");
 	for (i = 0; i < exclude_list.nr; i++)
@@ -1117,6 +1118,7 @@ int cmd_clean(int argc,
 		}
 	}
 
+	disable_fscache();
 	strbuf_release(&abs_path);
 	strbuf_release(&buf);
 	string_list_clear(&del_list, 0);

builtin/commit.c

@@ -1583,6 +1583,7 @@ struct repository *repo UNUSED)
 		       PATHSPEC_PREFER_FULL,
 		       prefix, argv);
 
+	enable_fscache(0);
 	if (status_format != STATUS_FORMAT_PORCELAIN &&
 	    status_format != STATUS_FORMAT_PORCELAIN_V2)
 		progress_flag = REFRESH_PROGRESS;
@@ -1623,6 +1624,7 @@ struct repository *repo UNUSED)
 	wt_status_print(&s);
 	wt_status_collect_free_buffers(&s);
 
+	disable_fscache();
 	return 0;
 }