Merge branch 'jm/status-ignored-files-list'

This is an early version of the latest iteration of what used to
be 08f088c (Merge branch 'show-ignored-directory', 2017-10-23),
i.e.  support for the then-experimental, now-dropped
`--show-ignored-directory` option.

The set of paths output from "git status --ignored" was tied
closely with its "--untracked=<mode>" option, but now it can be
controlled more flexibly.  Most notably, a directory that is
ignored because it is listed to be ignored in the ignore/exclude
mechanism can be handled differently from a directory that ends up
to be ignored only because all files in it are ignored.

* jm/status-ignored-files-list:
  status: test ignored modes
  status: document options to show matching ignored files
  status: report matching ignored and normal untracked
  status: add option to show ignored files differently

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: gitster

Documentation/git-status.txt

@@ -97,8 +97,27 @@ configuration variable documented in linkgit:git-config[1].
 	(and suppresses the output of submodule summaries when the config option
 	`status.submoduleSummary` is set).
 
---ignored::
+--ignored[=<mode>]::
 	Show ignored files as well.
++
+The mode parameter is used to specify the handling of ignored files.
+It is optional: it defaults to 'traditional'.
++
+The possible options are:
++
+	- 'traditional' - Shows ignored files and directories, unless
+			  --untracked-files=all is specifed, in which case
+			  individual files in ignored directories are
+			  displayed.
+	- 'no'	        - Show no ignored files.
+	- 'matching'    - Shows ignored files and directories matching an
+			  ignore pattern.
++
+When 'matching' mode is specified, paths that explicity match an
+ignored pattern are shown. If a directory matches an ignore pattern,
+then it is shown, but not paths contained in the ignored directory. If
+a directory does not match an ignore pattern, but all contents are
+ignored, then the directory is not shown, but all contents are shown.
 
 -z::
 	Terminate entries with NUL, instead of LF.  This implies

Documentation/technical/api-directory-listing.txt

@@ -22,23 +22,42 @@ The notable options are:
 
 `flags`::
 
-	A bit-field of options (the `*IGNORED*` flags are mutually exclusive):
+	A bit-field of options:
 
 `DIR_SHOW_IGNORED`:::
 
-	Return just ignored files in `entries[]`, not untracked files.
+	Return just ignored files in `entries[]`, not untracked
+	files. This flag is mutually exclusive with
+	`DIR_SHOW_IGNORED_TOO`.
 
 `DIR_SHOW_IGNORED_TOO`:::
 
-	Similar to `DIR_SHOW_IGNORED`, but return ignored files in `ignored[]`
-	in addition to untracked files in `entries[]`.
+	Similar to `DIR_SHOW_IGNORED`, but return ignored files in
+	`ignored[]` in addition to untracked files in
+	`entries[]`. This flag is mutually exclusive with
+	`DIR_SHOW_IGNORED`.
 
 `DIR_KEEP_UNTRACKED_CONTENTS`:::
 
 	Only has meaning if `DIR_SHOW_IGNORED_TOO` is also set; if this is set, the
 	untracked contents of untracked directories are also returned in
 	`entries[]`.
 
+`DIR_SHOW_IGNORED_TOO_MODE_MATCHING`:::
+
+	Only has meaning if `DIR_SHOW_IGNORED_TOO` is also set; if
+	this is set, returns ignored files and directories that match
+	an exclude pattern. If a directory matches an exclude pattern,
+	then the directory is returned and the contained paths are
+	not. A directory that does not match an exclude pattern will
+	not be returned even if all of its contents are ignored. In
+	this case, the contents are returned as individual entries.
++
+If this is set, files and directories that explicity match an ignore
+pattern are reported. Implicity ignored directories (directories that
+do not match an ignore pattern, but whose contents are all ignored)
+are not reported, instead all of the contents are reported.
+
 `DIR_COLLECT_IGNORED`:::
 
 	Special mode for git-add. Return ignored files in `ignored[]` and

builtin/commit.c

@@ -118,7 +118,7 @@ static int edit_flag = -1; /* unspecified */
 static int quiet, verbose, no_verify, allow_empty, dry_run, renew_authorship;
 static int config_commit_verbose = -1; /* unspecified */
 static int no_post_rewrite, allow_empty_message;
-static char *untracked_files_arg, *force_date, *ignore_submodule_arg;
+static char *untracked_files_arg, *force_date, *ignore_submodule_arg, *ignored_arg;
 static char *sign_commit;
 
 /*
@@ -139,7 +139,7 @@ static const char *cleanup_arg;
 static enum commit_whence whence;
 static int sequencer_in_use;
 static int use_editor = 1, include_status = 1;
-static int show_ignored_in_status, have_option_m;
+static int have_option_m;
 static struct strbuf message = STRBUF_INIT;
 
 static enum wt_status_format status_format = STATUS_FORMAT_UNSPECIFIED;
@@ -1075,6 +1075,19 @@ static const char *find_author_by_nickname(const char *name)
 	die(_("--author '%s' is not 'Name <email>' and matches no existing author"), name);
 }
 
+static void handle_ignored_arg(struct wt_status *s)
+{
+	if (!ignored_arg)
+		; /* default already initialized */
+	else if (!strcmp(ignored_arg, "traditional"))
+		s->show_ignored_mode = SHOW_TRADITIONAL_IGNORED;
+	else if (!strcmp(ignored_arg, "no"))
+		s->show_ignored_mode = SHOW_NO_IGNORED;
+	else if (!strcmp(ignored_arg, "matching"))
+		s->show_ignored_mode = SHOW_MATCHING_IGNORED;
+	else
+		die(_("Invalid ignored mode '%s'"), ignored_arg);
+}
 
 static void handle_untracked_files_arg(struct wt_status *s)
 {
@@ -1364,8 +1377,10 @@ int cmd_status(int argc, const char **argv, const char *prefix)
 		  N_("mode"),
 		  N_("show untracked files, optional modes: all, normal, no. (Default: all)"),
 		  PARSE_OPT_OPTARG, NULL, (intptr_t)"all" },
-		OPT_BOOL(0, "ignored", &show_ignored_in_status,
-			 N_("show ignored files")),
+		{ OPTION_STRING, 0, "ignored", &ignored_arg,
+		  N_("mode"),
+		  N_("show ignored files, optional modes: traditional, matching, no. (Default: traditional)"),
+		  PARSE_OPT_OPTARG, NULL, (intptr_t)"traditional" },
 		{ OPTION_STRING, 0, "ignore-submodules", &ignore_submodule_arg, N_("when"),
 		  N_("ignore changes to submodules, optional when: all, dirty, untracked. (Default: all)"),
 		  PARSE_OPT_OPTARG, NULL, (intptr_t)"all" },
@@ -1397,8 +1412,12 @@ int cmd_status(int argc, const char **argv, const char *prefix)
 		no_lock_index = 1;
 
 	handle_untracked_files_arg(&s);
-	if (show_ignored_in_status)
-		s.show_ignored_files = 1;
+	handle_ignored_arg(&s);
+
+	if (s.show_ignored_mode == SHOW_MATCHING_IGNORED &&
+	    s.show_untracked_files == SHOW_NO_UNTRACKED_FILES)
+		die(_("Unsupported combination of ignored and untracked-files arguments"));
+
 	parse_pathspec(&s.pathspec, 0,
 		       PATHSPEC_PREFER_FULL,
 		       prefix, argv);

dir.c

@@ -1389,6 +1389,30 @@ static enum path_treatment treat_directory(struct dir_struct *dir,
 	case index_nonexistent:
 		if (dir->flags & DIR_SHOW_OTHER_DIRECTORIES)
 			break;
+		if (exclude &&
+			(dir->flags & DIR_SHOW_IGNORED_TOO) &&
+			(dir->flags & DIR_SHOW_IGNORED_TOO_MODE_MATCHING)) {
+
+			/*
+			 * This is an excluded directory and we are
+			 * showing ignored paths that match an exclude
+			 * pattern.  (e.g. show directory as ignored
+			 * only if it matches an exclude pattern).
+			 * This path will either be 'path_excluded`
+			 * (if we are showing empty directories or if
+			 * the directory is not empty), or will be
+			 * 'path_none' (empty directory, and we are
+			 * not showing empty directories).
+			 */
+			if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))
+				return path_excluded;
+
+			if (read_directory_recursive(dir, istate, dirname, len,
+						     untracked, 1, 1, pathspec) == path_excluded)
+				return path_excluded;
+
+			return path_none;
+		}
 		if (!(dir->flags & DIR_NO_GITLINKS)) {
 			unsigned char sha1[20];
 			if (resolve_gitlink_ref(dirname, "HEAD", sha1) == 0)
@@ -1561,6 +1585,7 @@ static enum path_treatment treat_one_path(struct dir_struct *dir,
 {
 	int exclude;
 	int has_path_in_index = !!index_file_exists(istate, path->buf, path->len, ignore_case);
+	enum path_treatment path_treatment;
 
 	if (dtype == DT_UNKNOWN)
 		dtype = get_dtype(de, istate, path->buf, path->len);
@@ -1607,8 +1632,23 @@ static enum path_treatment treat_one_path(struct dir_struct *dir,
 		return path_none;
 	case DT_DIR:
 		strbuf_addch(path, '/');
-		return treat_directory(dir, istate, untracked, path->buf, path->len,
-				       baselen, exclude, pathspec);
+		path_treatment = treat_directory(dir, istate, untracked,
+						 path->buf, path->len,
+						 baselen, exclude, pathspec);
+		/*
+		 * If 1) we only want to return directories that
+		 * match an exclude pattern and 2) this directory does
+		 * not match an exclude pattern but all of its
+		 * contents are excluded, then indicate that we should
+		 * recurse into this directory (instead of marking the
+		 * directory itself as an ignored path).
+		 */
+		if (!exclude &&
+		    path_treatment == path_excluded &&
+		    (dir->flags & DIR_SHOW_IGNORED_TOO) &&
+		    (dir->flags & DIR_SHOW_IGNORED_TOO_MODE_MATCHING))
+			return path_recurse;
+		return path_treatment;
 	case DT_REG:
 	case DT_LNK:
 		return exclude ? path_excluded : path_untracked;

dir.h

@@ -152,7 +152,8 @@ struct dir_struct {
 		DIR_COLLECT_IGNORED = 1<<4,
 		DIR_SHOW_IGNORED_TOO = 1<<5,
 		DIR_COLLECT_KILLED_ONLY = 1<<6,
-		DIR_KEEP_UNTRACKED_CONTENTS = 1<<7
+		DIR_KEEP_UNTRACKED_CONTENTS = 1<<7,
+		DIR_SHOW_IGNORED_TOO_MODE_MATCHING = 1<<8
 	} flags;
 	struct dir_entry **entries;
 	struct dir_entry **ignored;