merge(3p/git): Merge git subtree at v2.29.2 r/1890

This also bumps the stable nixpkgs to 20.09 as of 2020-11-21, because
there is some breakage in the git build related to the netrc
credentials helper which someone has taken care of in nixpkgs.

The stable channel is not used for anything other than git, so this
should be fine.

Change-Id: I3575a19dab09e1e9556cf8231d717de9890484fb

1 files changed, 78 insertions, 56 deletions

diff --git a/third_party/git/builtin/clean.c b/third_party/git/builtin/clean.c
index d5579da716..687ab473c2 100644
--- a/third_party/git/builtin/clean.c
+++ b/third_party/git/builtin/clean.c
@@ -18,6 +18,7 @@
 #include "color.h"
 #include "pathspec.h"
 #include "help.h"
+#include "prompt.h"
 
 static int force = -1; /* unset */
 static int interactive;
@@ -158,9 +159,10 @@ static int remove_dirs(struct strbuf *path, const char *prefix, int force_flag,
 
 	*dir_gone = 1;
 
-	if ((force_flag & REMOVE_DIR_KEEP_NESTED_GIT) && is_nonbare_repository_dir(path)) {
+	if ((force_flag & REMOVE_DIR_KEEP_NESTED_GIT) &&
+	    is_nonbare_repository_dir(path)) {
 		if (!quiet) {
-			quote_path_relative(path->buf, prefix, &quoted);
+			quote_path(path->buf, prefix, &quoted, 0);
 			printf(dry_run ?  _(msg_would_skip_git_dir) : _(msg_skip_git_dir),
 					quoted.buf);
 		}
@@ -175,7 +177,7 @@ static int remove_dirs(struct strbuf *path, const char *prefix, int force_flag,
 		res = dry_run ? 0 : rmdir(path->buf);
 		if (res) {
 			int saved_errno = errno;
-			quote_path_relative(path->buf, prefix, &quoted);
+			quote_path(path->buf, prefix, &quoted, 0);
 			errno = saved_errno;
 			warning_errno(_(msg_warn_remove_failed), quoted.buf);
 			*dir_gone = 0;
@@ -200,7 +202,7 @@ static int remove_dirs(struct strbuf *path, const char *prefix, int force_flag,
 			if (remove_dirs(path, prefix, force_flag, dry_run, quiet, &gone))
 				ret = 1;
 			if (gone) {
-				quote_path_relative(path->buf, prefix, &quoted);
+				quote_path(path->buf, prefix, &quoted, 0);
 				string_list_append(&dels, quoted.buf);
 			} else
 				*dir_gone = 0;
@@ -208,11 +210,11 @@ static int remove_dirs(struct strbuf *path, const char *prefix, int force_flag,
 		} else {
 			res = dry_run ? 0 : unlink(path->buf);
 			if (!res) {
-				quote_path_relative(path->buf, prefix, &quoted);
+				quote_path(path->buf, prefix, &quoted, 0);
 				string_list_append(&dels, quoted.buf);
 			} else {
 				int saved_errno = errno;
-				quote_path_relative(path->buf, prefix, &quoted);
+				quote_path(path->buf, prefix, &quoted, 0);
 				errno = saved_errno;
 				warning_errno(_(msg_warn_remove_failed), quoted.buf);
 				*dir_gone = 0;
@@ -236,7 +238,7 @@ static int remove_dirs(struct strbuf *path, const char *prefix, int force_flag,
 			*dir_gone = 1;
 		else {
 			int saved_errno = errno;
-			quote_path_relative(path->buf, prefix, &quoted);
+			quote_path(path->buf, prefix, &quoted, 0);
 			errno = saved_errno;
 			warning_errno(_(msg_warn_remove_failed), quoted.buf);
 			*dir_gone = 0;
@@ -264,7 +266,7 @@ static void pretty_print_dels(void)
 	struct column_options copts;
 
 	for_each_string_list_item(item, &del_list) {
-		qname = quote_path_relative(item->string, NULL, &buf);
+		qname = quote_path(item->string, NULL, &buf, 0);
 		string_list_append(&list, qname);
 	}
 
@@ -419,7 +421,6 @@ static int find_unique(const char *choice, struct menu_stuff *menu_stuff)
 	return found;
 }
 
-
 /*
  * Parse user input, and return choice(s) for menu (menu_stuff).
  *
@@ -579,9 +580,7 @@ static int *list_and_choose(struct menu_opts *opts, struct menu_stuff *stuff)
 			       clean_get_color(CLEAN_COLOR_RESET));
 		}
 
-		if (strbuf_getline_lf(&choice, stdin) != EOF) {
-			strbuf_trim(&choice);
-		} else {
+		if (git_read_line_interactively(&choice) == EOF) {
 			eof = 1;
 			break;
 		}
@@ -648,7 +647,7 @@ static int filter_by_patterns_cmd(void)
 	struct strbuf confirm = STRBUF_INIT;
 	struct strbuf **ignore_list;
 	struct string_list_item *item;
-	struct exclude_list *el;
+	struct pattern_list *pl;
 	int changed = -1, i;
 
 	for (;;) {
@@ -661,17 +660,15 @@ static int filter_by_patterns_cmd(void)
 		clean_print_color(CLEAN_COLOR_PROMPT);
 		printf(_("Input ignore patterns>> "));
 		clean_print_color(CLEAN_COLOR_RESET);
-		if (strbuf_getline_lf(&confirm, stdin) != EOF)
-			strbuf_trim(&confirm);
-		else
+		if (git_read_line_interactively(&confirm) == EOF)
 			putchar('\n');
 
 		/* quit filter_by_pattern mode if press ENTER or Ctrl-D */
 		if (!confirm.len)
 			break;
 
-		memset(&dir, 0, sizeof(dir));
-		el = add_exclude_list(&dir, EXC_CMDL, "manual exclude");
+		dir_init(&dir);
+		pl = add_pattern_list(&dir, EXC_CMDL, "manual exclude");
 		ignore_list = strbuf_split_max(&confirm, ' ', 0);
 
 		for (i = 0; ignore_list[i]; i++) {
@@ -679,7 +676,7 @@ static int filter_by_patterns_cmd(void)
 			if (!ignore_list[i]->len)
 				continue;
 
-			add_exclude(ignore_list[i]->buf, "", 0, el, -(i+1));
+			add_pattern(ignore_list[i]->buf, "", 0, pl, -(i+1));
 		}
 
 		changed = 0;
@@ -701,7 +698,7 @@ static int filter_by_patterns_cmd(void)
 		}
 
 		strbuf_list_free(ignore_list);
-		clear_directory(&dir);
+		dir_clear(&dir);
 	}
 
 	strbuf_release(&confirm);
@@ -756,12 +753,10 @@ static int ask_each_cmd(void)
 	for_each_string_list_item(item, &del_list) {
 		/* Ctrl-D should stop removing files */
 		if (!eof) {
-			qname = quote_path_relative(item->string, NULL, &buf);
+			qname = quote_path(item->string, NULL, &buf, 0);
 			/* TRANSLATORS: Make sure to keep [y/N] as is */
 			printf(_("Remove %s [y/N]? "), qname);
-			if (strbuf_getline_lf(&confirm, stdin) != EOF) {
-				strbuf_trim(&confirm);
-			} else {
+			if (git_read_line_interactively(&confirm) == EOF) {
 				putchar('\n');
 				eof = 1;
 			}
@@ -901,7 +896,7 @@ int cmd_clean(int argc, const char **argv, const char *prefix)
 	struct pathspec pathspec;
 	struct strbuf buf = STRBUF_INIT;
 	struct string_list exclude_list = STRING_LIST_INIT_NODUP;
-	struct exclude_list *el;
+	struct pattern_list *pl;
 	struct string_list_item *item;
 	const char *qname;
 	struct option options[] = {
@@ -911,8 +906,8 @@ int cmd_clean(int argc, const char **argv, const char *prefix)
 		OPT_BOOL('i', "interactive", &interactive, N_("interactive cleaning")),
 		OPT_BOOL('d', NULL, &remove_directories,
 				N_("remove whole directories")),
-		{ OPTION_CALLBACK, 'e', "exclude", &exclude_list, N_("pattern"),
-		  N_("add <pattern> to ignore rules"), PARSE_OPT_NONEG, exclude_cb },
+		OPT_CALLBACK_F('e', "exclude", &exclude_list, N_("pattern"),
+		  N_("add <pattern> to ignore rules"), PARSE_OPT_NONEG, exclude_cb),
 		OPT_BOOL('x', NULL, &ignored, N_("remove ignored files, too")),
 		OPT_BOOL('X', NULL, &ignored_only,
 				N_("remove only ignored files")),
@@ -928,13 +923,7 @@ int cmd_clean(int argc, const char **argv, const char *prefix)
 	argc = parse_options(argc, argv, prefix, options, builtin_clean_usage,
 			     0);
 
-	memset(&dir, 0, sizeof(dir));
-	if (ignored_only)
-		dir.flags |= DIR_SHOW_IGNORED;
-
-	if (ignored && ignored_only)
-		die(_("-x and -X cannot be used together"));
-
+	dir_init(&dir);
 	if (!interactive && !dry_run && !force) {
 		if (config_set)
 			die(_("clean.requireForce set to true and neither -i, -n, nor -f given; "
@@ -946,21 +935,64 @@ int cmd_clean(int argc, const char **argv, const char *prefix)
 
 	if (force > 1)
 		rm_flags = 0;
+	else
+		dir.flags |= DIR_SKIP_NESTED_GIT;
 
 	dir.flags |= DIR_SHOW_OTHER_DIRECTORIES;
 
-	if (remove_directories)
-		dir.flags |= DIR_SHOW_IGNORED_TOO | DIR_KEEP_UNTRACKED_CONTENTS;
+	if (ignored && ignored_only)
+		die(_("-x and -X cannot be used together"));
+	if (!ignored)
+		setup_standard_excludes(&dir);
+	if (ignored_only)
+		dir.flags |= DIR_SHOW_IGNORED;
+
+	if (argc) {
+		/*
+		 * Remaining args implies pathspecs specified, and we should
+		 * recurse within those.
+		 */
+		remove_directories = 1;
+	}
+
+	if (remove_directories && !ignored_only) {
+		/*
+		 * We need to know about ignored files too:
+		 *
+		 * If (ignored), then we will delete ignored files as well.
+		 *
+		 * If (!ignored), then even though we not are doing
+		 * anything with ignored files, we need to know about them
+		 * so that we can avoid deleting a directory of untracked
+		 * files that also contains an ignored file within it.
+		 *
+		 * For the (!ignored) case, since we only need to avoid
+		 * deleting ignored files, we can set
+		 * DIR_SHOW_IGNORED_TOO_MODE_MATCHING in order to avoid
+		 * recursing into a directory which is itself ignored.
+		 */
+		dir.flags |= DIR_SHOW_IGNORED_TOO;
+		if (!ignored)
+			dir.flags |= DIR_SHOW_IGNORED_TOO_MODE_MATCHING;
+
+		/*
+		 * Let the fill_directory() machinery know that we aren't
+		 * just recursing to collect the ignored files; we want all
+		 * the untracked ones so that we can delete them.  (Note:
+		 * we could also set DIR_KEEP_UNTRACKED_CONTENTS when
+		 * ignored_only is true, since DIR_KEEP_UNTRACKED_CONTENTS
+		 * only has effect in combination with DIR_SHOW_IGNORED_TOO.  It makes
+		 * the code clearer to exclude it, though.
+		 */
+		dir.flags |= DIR_KEEP_UNTRACKED_CONTENTS;
+	}
 
 	if (read_cache() < 0)
 		die(_("index file corrupt"));
 
-	if (!ignored)
-		setup_standard_excludes(&dir);
-
-	el = add_exclude_list(&dir, EXC_CMDL, "--exclude option");
+	pl = add_pattern_list(&dir, EXC_CMDL, "--exclude option");
 	for (i = 0; i < exclude_list.nr; i++)
-		add_exclude(exclude_list.items[i].string, "", 0, el, -(i+1));
+		add_pattern(exclude_list.items[i].string, "", 0, pl, -(i+1));
 
 	parse_pathspec(&pathspec, 0,
 		       PATHSPEC_PREFER_CWD,
@@ -978,12 +1010,6 @@ int cmd_clean(int argc, const char **argv, const char *prefix)
 		if (!cache_name_is_other(ent->name, ent->len))
 			continue;
 
-		if (pathspec.nr)
-			matches = dir_path_match(&the_index, ent, &pathspec, 0, NULL);
-
-		if (pathspec.nr && !matches)
-			continue;
-
 		if (lstat(ent->name, &st))
 			die_errno("Cannot lstat '%s'", ent->name);
 
@@ -995,11 +1021,7 @@ int cmd_clean(int argc, const char **argv, const char *prefix)
 		string_list_append(&del_list, rel);
 	}
 
-	for (i = 0; i < dir.nr; i++)
-		free(dir.entries[i]);
-
-	for (i = 0; i < dir.ignored_nr; i++)
-		free(dir.ignored[i]);
+	dir_clear(&dir);
 
 	if (interactive && del_list.nr > 0)
 		interactive_main_loop();
@@ -1007,6 +1029,7 @@ int cmd_clean(int argc, const char **argv, const char *prefix)
 	for_each_string_list_item(item, &del_list) {
 		struct stat st;
 
+		strbuf_reset(&abs_path);
 		if (prefix)
 			strbuf_addstr(&abs_path, prefix);
 
@@ -1024,23 +1047,22 @@ int cmd_clean(int argc, const char **argv, const char *prefix)
 			if (remove_dirs(&abs_path, prefix, rm_flags, dry_run, quiet, &gone))
 				errors++;
 			if (gone && !quiet) {
-				qname = quote_path_relative(item->string, NULL, &buf);
+				qname = quote_path(item->string, NULL, &buf, 0);
 				printf(dry_run ? _(msg_would_remove) : _(msg_remove), qname);
 			}
 		} else {
 			res = dry_run ? 0 : unlink(abs_path.buf);
 			if (res) {
 				int saved_errno = errno;
-				qname = quote_path_relative(item->string, NULL, &buf);
+				qname = quote_path(item->string, NULL, &buf, 0);
 				errno = saved_errno;
 				warning_errno(_(msg_warn_remove_failed), qname);
 				errors++;
 			} else if (!quiet) {
-				qname = quote_path_relative(item->string, NULL, &buf);
+				qname = quote_path(item->string, NULL, &buf, 0);
 				printf(dry_run ? _(msg_would_remove) : _(msg_remove), qname);
 			}
 		}
-		strbuf_reset(&abs_path);
 	}
 
 	strbuf_release(&abs_path);