merge(third_party/git): Merge squashed git subtree at v2.23.0 r/373

Merge commit '1b593e1ea4d2af0f6444d9a7788d5d99abd6fde5' as 'third_party/git'

1 files changed, 2487 insertions, 0 deletions

diff --git a/third_party/git/wt-status.c b/third_party/git/wt-status.c
new file mode 100644
index 000000000000..9f6c65a58097
--- /dev/null
+++ b/third_party/git/wt-status.c
@@ -0,0 +1,2487 @@
+#include "cache.h"
+#include "wt-status.h"
+#include "object.h"
+#include "dir.h"
+#include "commit.h"
+#include "diff.h"
+#include "revision.h"
+#include "diffcore.h"
+#include "quote.h"
+#include "run-command.h"
+#include "argv-array.h"
+#include "remote.h"
+#include "refs.h"
+#include "submodule.h"
+#include "column.h"
+#include "strbuf.h"
+#include "utf8.h"
+#include "worktree.h"
+#include "lockfile.h"
+#include "sequencer.h"
+
+#define AB_DELAY_WARNING_IN_MS (2 * 1000)
+
+static const char cut_line[] =
+"------------------------ >8 ------------------------\n";
+
+static char default_wt_status_colors[][COLOR_MAXLEN] = {
+	GIT_COLOR_NORMAL, /* WT_STATUS_HEADER */
+	GIT_COLOR_GREEN,  /* WT_STATUS_UPDATED */
+	GIT_COLOR_RED,    /* WT_STATUS_CHANGED */
+	GIT_COLOR_RED,    /* WT_STATUS_UNTRACKED */
+	GIT_COLOR_RED,    /* WT_STATUS_NOBRANCH */
+	GIT_COLOR_RED,    /* WT_STATUS_UNMERGED */
+	GIT_COLOR_GREEN,  /* WT_STATUS_LOCAL_BRANCH */
+	GIT_COLOR_RED,    /* WT_STATUS_REMOTE_BRANCH */
+	GIT_COLOR_NIL,    /* WT_STATUS_ONBRANCH */
+};
+
+static const char *color(int slot, struct wt_status *s)
+{
+	const char *c = "";
+	if (want_color(s->use_color))
+		c = s->color_palette[slot];
+	if (slot == WT_STATUS_ONBRANCH && color_is_nil(c))
+		c = s->color_palette[WT_STATUS_HEADER];
+	return c;
+}
+
+static void status_vprintf(struct wt_status *s, int at_bol, const char *color,
+		const char *fmt, va_list ap, const char *trail)
+{
+	struct strbuf sb = STRBUF_INIT;
+	struct strbuf linebuf = STRBUF_INIT;
+	const char *line, *eol;
+
+	strbuf_vaddf(&sb, fmt, ap);
+	if (!sb.len) {
+		if (s->display_comment_prefix) {
+			strbuf_addch(&sb, comment_line_char);
+			if (!trail)
+				strbuf_addch(&sb, ' ');
+		}
+		color_print_strbuf(s->fp, color, &sb);
+		if (trail)
+			fprintf(s->fp, "%s", trail);
+		strbuf_release(&sb);
+		return;
+	}
+	for (line = sb.buf; *line; line = eol + 1) {
+		eol = strchr(line, '\n');
+
+		strbuf_reset(&linebuf);
+		if (at_bol && s->display_comment_prefix) {
+			strbuf_addch(&linebuf, comment_line_char);
+			if (*line != '\n' && *line != '\t')
+				strbuf_addch(&linebuf, ' ');
+		}
+		if (eol)
+			strbuf_add(&linebuf, line, eol - line);
+		else
+			strbuf_addstr(&linebuf, line);
+		color_print_strbuf(s->fp, color, &linebuf);
+		if (eol)
+			fprintf(s->fp, "\n");
+		else
+			break;
+		at_bol = 1;
+	}
+	if (trail)
+		fprintf(s->fp, "%s", trail);
+	strbuf_release(&linebuf);
+	strbuf_release(&sb);
+}
+
+void status_printf_ln(struct wt_status *s, const char *color,
+			const char *fmt, ...)
+{
+	va_list ap;
+
+	va_start(ap, fmt);
+	status_vprintf(s, 1, color, fmt, ap, "\n");
+	va_end(ap);
+}
+
+void status_printf(struct wt_status *s, const char *color,
+			const char *fmt, ...)
+{
+	va_list ap;
+
+	va_start(ap, fmt);
+	status_vprintf(s, 1, color, fmt, ap, NULL);
+	va_end(ap);
+}
+
+static void status_printf_more(struct wt_status *s, const char *color,
+			       const char *fmt, ...)
+{
+	va_list ap;
+
+	va_start(ap, fmt);
+	status_vprintf(s, 0, color, fmt, ap, NULL);
+	va_end(ap);
+}
+
+void wt_status_prepare(struct repository *r, struct wt_status *s)
+{
+	memset(s, 0, sizeof(*s));
+	s->repo = r;
+	memcpy(s->color_palette, default_wt_status_colors,
+	       sizeof(default_wt_status_colors));
+	s->show_untracked_files = SHOW_NORMAL_UNTRACKED_FILES;
+	s->use_color = -1;
+	s->relative_paths = 1;
+	s->branch = resolve_refdup("HEAD", 0, NULL, NULL);
+	s->reference = "HEAD";
+	s->fp = stdout;
+	s->index_file = get_index_file();
+	s->change.strdup_strings = 1;
+	s->untracked.strdup_strings = 1;
+	s->ignored.strdup_strings = 1;
+	s->show_branch = -1;  /* unspecified */
+	s->show_stash = 0;
+	s->ahead_behind_flags = AHEAD_BEHIND_UNSPECIFIED;
+	s->display_comment_prefix = 0;
+	s->detect_rename = -1;
+	s->rename_score = -1;
+	s->rename_limit = -1;
+}
+
+static void wt_longstatus_print_unmerged_header(struct wt_status *s)
+{
+	int i;
+	int del_mod_conflict = 0;
+	int both_deleted = 0;
+	int not_deleted = 0;
+	const char *c = color(WT_STATUS_HEADER, s);
+
+	status_printf_ln(s, c, _("Unmerged paths:"));
+
+	for (i = 0; i < s->change.nr; i++) {
+		struct string_list_item *it = &(s->change.items[i]);
+		struct wt_status_change_data *d = it->util;
+
+		switch (d->stagemask) {
+		case 0:
+			break;
+		case 1:
+			both_deleted = 1;
+			break;
+		case 3:
+		case 5:
+			del_mod_conflict = 1;
+			break;
+		default:
+			not_deleted = 1;
+			break;
+		}
+	}
+
+	if (!s->hints)
+		return;
+	if (s->whence != FROM_COMMIT)
+		;
+	else if (!s->is_initial) {
+		if (!strcmp(s->reference, "HEAD"))
+			status_printf_ln(s, c,
+					 _("  (use \"git restore --staged <file>...\" to unstage)"));
+		else
+			status_printf_ln(s, c,
+					 _("  (use \"git restore --source=%s --staged <file>...\" to unstage)"),
+					 s->reference);
+	} else
+		status_printf_ln(s, c, _("  (use \"git rm --cached <file>...\" to unstage)"));
+
+	if (!both_deleted) {
+		if (!del_mod_conflict)
+			status_printf_ln(s, c, _("  (use \"git add <file>...\" to mark resolution)"));
+		else
+			status_printf_ln(s, c, _("  (use \"git add/rm <file>...\" as appropriate to mark resolution)"));
+	} else if (!del_mod_conflict && !not_deleted) {
+		status_printf_ln(s, c, _("  (use \"git rm <file>...\" to mark resolution)"));
+	} else {
+		status_printf_ln(s, c, _("  (use \"git add/rm <file>...\" as appropriate to mark resolution)"));
+	}
+}
+
+static void wt_longstatus_print_cached_header(struct wt_status *s)
+{
+	const char *c = color(WT_STATUS_HEADER, s);
+
+	status_printf_ln(s, c, _("Changes to be committed:"));
+	if (!s->hints)
+		return;
+	if (s->whence != FROM_COMMIT)
+		; /* NEEDSWORK: use "git reset --unresolve"??? */
+	else if (!s->is_initial) {
+		if (!strcmp(s->reference, "HEAD"))
+			status_printf_ln(s, c
+					 , _("  (use \"git restore --staged <file>...\" to unstage)"));
+		else
+			status_printf_ln(s, c,
+					 _("  (use \"git restore --source=%s --staged <file>...\" to unstage)"),
+					 s->reference);
+	} else
+		status_printf_ln(s, c, _("  (use \"git rm --cached <file>...\" to unstage)"));
+}
+
+static void wt_longstatus_print_dirty_header(struct wt_status *s,
+					     int has_deleted,
+					     int has_dirty_submodules)
+{
+	const char *c = color(WT_STATUS_HEADER, s);
+
+	status_printf_ln(s, c, _("Changes not staged for commit:"));
+	if (!s->hints)
+		return;
+	if (!has_deleted)
+		status_printf_ln(s, c, _("  (use \"git add <file>...\" to update what will be committed)"));
+	else
+		status_printf_ln(s, c, _("  (use \"git add/rm <file>...\" to update what will be committed)"));
+	status_printf_ln(s, c, _("  (use \"git restore <file>...\" to discard changes in working directory)"));
+	if (has_dirty_submodules)
+		status_printf_ln(s, c, _("  (commit or discard the untracked or modified content in submodules)"));
+}
+
+static void wt_longstatus_print_other_header(struct wt_status *s,
+					     const char *what,
+					     const char *how)
+{
+	const char *c = color(WT_STATUS_HEADER, s);
+	status_printf_ln(s, c, "%s:", what);
+	if (!s->hints)
+		return;
+	status_printf_ln(s, c, _("  (use \"git %s <file>...\" to include in what will be committed)"), how);
+}
+
+static void wt_longstatus_print_trailer(struct wt_status *s)
+{
+	status_printf_ln(s, color(WT_STATUS_HEADER, s), "%s", "");
+}
+
+#define quote_path quote_path_relative
+
+static const char *wt_status_unmerged_status_string(int stagemask)
+{
+	switch (stagemask) {
+	case 1:
+		return _("both deleted:");
+	case 2:
+		return _("added by us:");
+	case 3:
+		return _("deleted by them:");
+	case 4:
+		return _("added by them:");
+	case 5:
+		return _("deleted by us:");
+	case 6:
+		return _("both added:");
+	case 7:
+		return _("both modified:");
+	default:
+		BUG("unhandled unmerged status %x", stagemask);
+	}
+}
+
+static const char *wt_status_diff_status_string(int status)
+{
+	switch (status) {
+	case DIFF_STATUS_ADDED:
+		return _("new file:");
+	case DIFF_STATUS_COPIED:
+		return _("copied:");
+	case DIFF_STATUS_DELETED:
+		return _("deleted:");
+	case DIFF_STATUS_MODIFIED:
+		return _("modified:");
+	case DIFF_STATUS_RENAMED:
+		return _("renamed:");
+	case DIFF_STATUS_TYPE_CHANGED:
+		return _("typechange:");
+	case DIFF_STATUS_UNKNOWN:
+		return _("unknown:");
+	case DIFF_STATUS_UNMERGED:
+		return _("unmerged:");
+	default:
+		return NULL;
+	}
+}
+
+static int maxwidth(const char *(*label)(int), int minval, int maxval)
+{
+	int result = 0, i;
+
+	for (i = minval; i <= maxval; i++) {
+		const char *s = label(i);
+		int len = s ? utf8_strwidth(s) : 0;
+		if (len > result)
+			result = len;
+	}
+	return result;
+}
+
+static void wt_longstatus_print_unmerged_data(struct wt_status *s,
+					      struct string_list_item *it)
+{
+	const char *c = color(WT_STATUS_UNMERGED, s);
+	struct wt_status_change_data *d = it->util;
+	struct strbuf onebuf = STRBUF_INIT;
+	static char *padding;
+	static int label_width;
+	const char *one, *how;
+	int len;
+
+	if (!padding) {
+		label_width = maxwidth(wt_status_unmerged_status_string, 1, 7);
+		label_width += strlen(" ");
+		padding = xmallocz(label_width);
+		memset(padding, ' ', label_width);
+	}
+
+	one = quote_path(it->string, s->prefix, &onebuf);
+	status_printf(s, color(WT_STATUS_HEADER, s), "\t");
+
+	how = wt_status_unmerged_status_string(d->stagemask);
+	len = label_width - utf8_strwidth(how);
+	status_printf_more(s, c, "%s%.*s%s\n", how, len, padding, one);
+	strbuf_release(&onebuf);
+}
+
+static void wt_longstatus_print_change_data(struct wt_status *s,
+					    int change_type,
+					    struct string_list_item *it)
+{
+	struct wt_status_change_data *d = it->util;
+	const char *c = color(change_type, s);
+	int status;
+	char *one_name;
+	char *two_name;
+	const char *one, *two;
+	struct strbuf onebuf = STRBUF_INIT, twobuf = STRBUF_INIT;
+	struct strbuf extra = STRBUF_INIT;
+	static char *padding;
+	static int label_width;
+	const char *what;
+	int len;
+
+	if (!padding) {
+		/* If DIFF_STATUS_* uses outside the range [A..Z], we're in trouble */
+		label_width = maxwidth(wt_status_diff_status_string, 'A', 'Z');
+		label_width += strlen(" ");
+		padding = xmallocz(label_width);
+		memset(padding, ' ', label_width);
+	}
+
+	one_name = two_name = it->string;
+	switch (change_type) {
+	case WT_STATUS_UPDATED:
+		status = d->index_status;
+		break;
+	case WT_STATUS_CHANGED:
+		if (d->new_submodule_commits || d->dirty_submodule) {
+			strbuf_addstr(&extra, " (");
+			if (d->new_submodule_commits)
+				strbuf_addstr(&extra, _("new commits, "));
+			if (d->dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
+				strbuf_addstr(&extra, _("modified content, "));
+			if (d->dirty_submodule & DIRTY_SUBMODULE_UNTRACKED)
+				strbuf_addstr(&extra, _("untracked content, "));
+			strbuf_setlen(&extra, extra.len - 2);
+			strbuf_addch(&extra, ')');
+		}
+		status = d->worktree_status;
+		break;
+	default:
+		BUG("unhandled change_type %d in wt_longstatus_print_change_data",
+		    change_type);
+	}
+
+	/*
+	 * Only pick up the rename it's relevant. If the rename is for
+	 * the changed section and we're printing the updated section,
+	 * ignore it.
+	 */
+	if (d->rename_status == status)
+		one_name = d->rename_source;
+
+	one = quote_path(one_name, s->prefix, &onebuf);
+	two = quote_path(two_name, s->prefix, &twobuf);
+
+	status_printf(s, color(WT_STATUS_HEADER, s), "\t");
+	what = wt_status_diff_status_string(status);
+	if (!what)
+		BUG("unhandled diff status %c", status);
+	len = label_width - utf8_strwidth(what);
+	assert(len >= 0);
+	if (one_name != two_name)
+		status_printf_more(s, c, "%s%.*s%s -> %s",
+				   what, len, padding, one, two);
+	else
+		status_printf_more(s, c, "%s%.*s%s",
+				   what, len, padding, one);
+	if (extra.len) {
+		status_printf_more(s, color(WT_STATUS_HEADER, s), "%s", extra.buf);
+		strbuf_release(&extra);
+	}
+	status_printf_more(s, GIT_COLOR_NORMAL, "\n");
+	strbuf_release(&onebuf);
+	strbuf_release(&twobuf);
+}
+
+static char short_submodule_status(struct wt_status_change_data *d)
+{
+	if (d->new_submodule_commits)
+		return 'M';
+	if (d->dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
+		return 'm';
+	if (d->dirty_submodule & DIRTY_SUBMODULE_UNTRACKED)
+		return '?';
+	return d->worktree_status;
+}
+
+static void wt_status_collect_changed_cb(struct diff_queue_struct *q,
+					 struct diff_options *options,
+					 void *data)
+{
+	struct wt_status *s = data;
+	int i;
+
+	if (!q->nr)
+		return;
+	s->workdir_dirty = 1;
+	for (i = 0; i < q->nr; i++) {
+		struct diff_filepair *p;
+		struct string_list_item *it;
+		struct wt_status_change_data *d;
+
+		p = q->queue[i];
+		it = string_list_insert(&s->change, p->two->path);
+		d = it->util;
+		if (!d) {
+			d = xcalloc(1, sizeof(*d));
+			it->util = d;
+		}
+		if (!d->worktree_status)
+			d->worktree_status = p->status;
+		if (S_ISGITLINK(p->two->mode)) {
+			d->dirty_submodule = p->two->dirty_submodule;
+			d->new_submodule_commits = !oideq(&p->one->oid,
+							  &p->two->oid);
+			if (s->status_format == STATUS_FORMAT_SHORT)
+				d->worktree_status = short_submodule_status(d);
+		}
+
+		switch (p->status) {
+		case DIFF_STATUS_ADDED:
+			d->mode_worktree = p->two->mode;
+			break;
+
+		case DIFF_STATUS_DELETED:
+			d->mode_index = p->one->mode;
+			oidcpy(&d->oid_index, &p->one->oid);
+			/* mode_worktree is zero for a delete. */
+			break;
+
+		case DIFF_STATUS_COPIED:
+		case DIFF_STATUS_RENAMED:
+			if (d->rename_status)
+				BUG("multiple renames on the same target? how?");
+			d->rename_source = xstrdup(p->one->path);
+			d->rename_score = p->score * 100 / MAX_SCORE;
+			d->rename_status = p->status;
+			/* fallthru */
+		case DIFF_STATUS_MODIFIED:
+		case DIFF_STATUS_TYPE_CHANGED:
+		case DIFF_STATUS_UNMERGED:
+			d->mode_index = p->one->mode;
+			d->mode_worktree = p->two->mode;
+			oidcpy(&d->oid_index, &p->one->oid);
+			break;
+
+		default:
+			BUG("unhandled diff-files status '%c'", p->status);
+			break;
+		}
+
+	}
+}
+
+static int unmerged_mask(struct index_state *istate, const char *path)
+{
+	int pos, mask;
+	const struct cache_entry *ce;
+
+	pos = index_name_pos(istate, path, strlen(path));
+	if (0 <= pos)
+		return 0;
+
+	mask = 0;
+	pos = -pos-1;
+	while (pos < istate->cache_nr) {
+		ce = istate->cache[pos++];
+		if (strcmp(ce->name, path) || !ce_stage(ce))
+			break;
+		mask |= (1 << (ce_stage(ce) - 1));
+	}
+	return mask;
+}
+
+static void wt_status_collect_updated_cb(struct diff_queue_struct *q,
+					 struct diff_options *options,
+					 void *data)
+{
+	struct wt_status *s = data;
+	int i;
+
+	for (i = 0; i < q->nr; i++) {
+		struct diff_filepair *p;
+		struct string_list_item *it;
+		struct wt_status_change_data *d;
+
+		p = q->queue[i];
+		it = string_list_insert(&s->change, p->two->path);
+		d = it->util;
+		if (!d) {
+			d = xcalloc(1, sizeof(*d));
+			it->util = d;
+		}
+		if (!d->index_status)
+			d->index_status = p->status;
+		switch (p->status) {
+		case DIFF_STATUS_ADDED:
+			/* Leave {mode,oid}_head zero for an add. */
+			d->mode_index = p->two->mode;
+			oidcpy(&d->oid_index, &p->two->oid);
+			s->committable = 1;
+			break;
+		case DIFF_STATUS_DELETED:
+			d->mode_head = p->one->mode;
+			oidcpy(&d->oid_head, &p->one->oid);
+			s->committable = 1;
+			/* Leave {mode,oid}_index zero for a delete. */
+			break;
+
+		case DIFF_STATUS_COPIED:
+		case DIFF_STATUS_RENAMED:
+			if (d->rename_status)
+				BUG("multiple renames on the same target? how?");
+			d->rename_source = xstrdup(p->one->path);
+			d->rename_score = p->score * 100 / MAX_SCORE;
+			d->rename_status = p->status;
+			/* fallthru */
+		case DIFF_STATUS_MODIFIED:
+		case DIFF_STATUS_TYPE_CHANGED:
+			d->mode_head = p->one->mode;
+			d->mode_index = p->two->mode;
+			oidcpy(&d->oid_head, &p->one->oid);
+			oidcpy(&d->oid_index, &p->two->oid);
+			s->committable = 1;
+			break;
+		case DIFF_STATUS_UNMERGED:
+			d->stagemask = unmerged_mask(s->repo->index,
+						     p->two->path);
+			/*
+			 * Don't bother setting {mode,oid}_{head,index} since the print
+			 * code will output the stage values directly and not use the
+			 * values in these fields.
+			 */
+			break;
+
+		default:
+			BUG("unhandled diff-index status '%c'", p->status);
+			break;
+		}
+	}
+}
+
+static void wt_status_collect_changes_worktree(struct wt_status *s)
+{
+	struct rev_info rev;
+
+	repo_init_revisions(s->repo, &rev, NULL);
+	setup_revisions(0, NULL, &rev, NULL);
+	rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
+	rev.diffopt.flags.dirty_submodules = 1;
+	rev.diffopt.ita_invisible_in_index = 1;
+	if (!s->show_untracked_files)
+		rev.diffopt.flags.ignore_untracked_in_submodules = 1;
+	if (s->ignore_submodule_arg) {
+		rev.diffopt.flags.override_submodule_config = 1;
+		handle_ignore_submodules_arg(&rev.diffopt, s->ignore_submodule_arg);
+	}
+	rev.diffopt.format_callback = wt_status_collect_changed_cb;
+	rev.diffopt.format_callback_data = s;
+	rev.diffopt.detect_rename = s->detect_rename >= 0 ? s->detect_rename : rev.diffopt.detect_rename;
+	rev.diffopt.rename_limit = s->rename_limit >= 0 ? s->rename_limit : rev.diffopt.rename_limit;
+	rev.diffopt.rename_score = s->rename_score >= 0 ? s->rename_score : rev.diffopt.rename_score;
+	copy_pathspec(&rev.prune_data, &s->pathspec);
+	run_diff_files(&rev, 0);
+}
+
+static void wt_status_collect_changes_index(struct wt_status *s)
+{
+	struct rev_info rev;
+	struct setup_revision_opt opt;
+
+	repo_init_revisions(s->repo, &rev, NULL);
+	memset(&opt, 0, sizeof(opt));
+	opt.def = s->is_initial ? empty_tree_oid_hex() : s->reference;
+	setup_revisions(0, NULL, &rev, &opt);
+
+	rev.diffopt.flags.override_submodule_config = 1;
+	rev.diffopt.ita_invisible_in_index = 1;
+	if (s->ignore_submodule_arg) {
+		handle_ignore_submodules_arg(&rev.diffopt, s->ignore_submodule_arg);
+	} else {
+		/*
+		 * Unless the user did explicitly request a submodule ignore
+		 * mode by passing a command line option we do not ignore any
+		 * changed submodule SHA-1s when comparing index and HEAD, no
+		 * matter what is configured. Otherwise the user won't be
+		 * shown any submodules she manually added (and which are
+		 * staged to be committed), which would be really confusing.
+		 */
+		handle_ignore_submodules_arg(&rev.diffopt, "dirty");
+	}
+
+	rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
+	rev.diffopt.format_callback = wt_status_collect_updated_cb;
+	rev.diffopt.format_callback_data = s;
+	rev.diffopt.detect_rename = s->detect_rename >= 0 ? s->detect_rename : rev.diffopt.detect_rename;
+	rev.diffopt.rename_limit = s->rename_limit >= 0 ? s->rename_limit : rev.diffopt.rename_limit;
+	rev.diffopt.rename_score = s->rename_score >= 0 ? s->rename_score : rev.diffopt.rename_score;
+	copy_pathspec(&rev.prune_data, &s->pathspec);
+	run_diff_index(&rev, 1);
+}
+
+static void wt_status_collect_changes_initial(struct wt_status *s)
+{
+	struct index_state *istate = s->repo->index;
+	int i;
+
+	for (i = 0; i < istate->cache_nr; i++) {
+		struct string_list_item *it;
+		struct wt_status_change_data *d;
+		const struct cache_entry *ce = istate->cache[i];
+
+		if (!ce_path_match(istate, ce, &s->pathspec, NULL))
+			continue;
+		if (ce_intent_to_add(ce))
+			continue;
+		it = string_list_insert(&s->change, ce->name);
+		d = it->util;
+		if (!d) {
+			d = xcalloc(1, sizeof(*d));
+			it->util = d;
+		}
+		if (ce_stage(ce)) {
+			d->index_status = DIFF_STATUS_UNMERGED;
+			d->stagemask |= (1 << (ce_stage(ce) - 1));
+			/*
+			 * Don't bother setting {mode,oid}_{head,index} since the print
+			 * code will output the stage values directly and not use the
+			 * values in these fields.
+			 */
+			s->committable = 1;
+		} else {
+			d->index_status = DIFF_STATUS_ADDED;
+			/* Leave {mode,oid}_head zero for adds. */
+			d->mode_index = ce->ce_mode;
+			oidcpy(&d->oid_index, &ce->oid);
+			s->committable = 1;
+		}
+	}
+}
+
+static void wt_status_collect_untracked(struct wt_status *s)
+{
+	int i;
+	struct dir_struct dir;
+	uint64_t t_begin = getnanotime();
+	struct index_state *istate = s->repo->index;
+
+	if (!s->show_untracked_files)
+		return;
+
+	memset(&dir, 0, sizeof(dir));
+	if (s->show_untracked_files != SHOW_ALL_UNTRACKED_FILES)
+		dir.flags |=
+			DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES;
+	if (s->show_ignored_mode) {
+		dir.flags |= DIR_SHOW_IGNORED_TOO;
+
+		if (s->show_ignored_mode == SHOW_MATCHING_IGNORED)
+			dir.flags |= DIR_SHOW_IGNORED_TOO_MODE_MATCHING;
+	} else {
+		dir.untracked = istate->untracked;
+	}
+
+	setup_standard_excludes(&dir);
+
+	fill_directory(&dir, istate, &s->pathspec);
+
+	for (i = 0; i < dir.nr; i++) {
+		struct dir_entry *ent = dir.entries[i];
+		if (index_name_is_other(istate, ent->name, ent->len) &&
+		    dir_path_match(istate, ent, &s->pathspec, 0, NULL))
+			string_list_insert(&s->untracked, ent->name);
+		free(ent);
+	}
+
+	for (i = 0; i < dir.ignored_nr; i++) {
+		struct dir_entry *ent = dir.ignored[i];
+		if (index_name_is_other(istate, ent->name, ent->len) &&
+		    dir_path_match(istate, ent, &s->pathspec, 0, NULL))
+			string_list_insert(&s->ignored, ent->name);
+		free(ent);
+	}
+
+	free(dir.entries);
+	free(dir.ignored);
+	clear_directory(&dir);
+
+	if (advice_status_u_option)
+		s->untracked_in_ms = (getnanotime() - t_begin) / 1000000;
+}
+
+static int has_unmerged(struct wt_status *s)
+{
+	int i;
+
+	for (i = 0; i < s->change.nr; i++) {
+		struct wt_status_change_data *d;
+		d = s->change.items[i].util;
+		if (d->stagemask)
+			return 1;
+	}
+	return 0;
+}
+
+void wt_status_collect(struct wt_status *s)
+{
+	trace2_region_enter("status", "worktrees", s->repo);
+	wt_status_collect_changes_worktree(s);
+	trace2_region_leave("status", "worktrees", s->repo);
+
+	if (s->is_initial) {
+		trace2_region_enter("status", "initial", s->repo);
+		wt_status_collect_changes_initial(s);
+		trace2_region_leave("status", "initial", s->repo);
+	} else {
+		trace2_region_enter("status", "index", s->repo);
+		wt_status_collect_changes_index(s);
+		trace2_region_leave("status", "index", s->repo);
+	}
+
+	trace2_region_enter("status", "untracked", s->repo);
+	wt_status_collect_untracked(s);
+	trace2_region_leave("status", "untracked", s->repo);
+
+	wt_status_get_state(s->repo, &s->state, s->branch && !strcmp(s->branch, "HEAD"));
+	if (s->state.merge_in_progress && !has_unmerged(s))
+		s->committable = 1;
+}
+
+void wt_status_collect_free_buffers(struct wt_status *s)
+{
+	free(s->state.branch);
+	free(s->state.onto);
+	free(s->state.detached_from);
+}
+
+static void wt_longstatus_print_unmerged(struct wt_status *s)
+{
+	int shown_header = 0;
+	int i;
+
+	for (i = 0; i < s->change.nr; i++) {
+		struct wt_status_change_data *d;
+		struct string_list_item *it;
+		it = &(s->change.items[i]);
+		d = it->util;
+		if (!d->stagemask)
+			continue;
+		if (!shown_header) {
+			wt_longstatus_print_unmerged_header(s);
+			shown_header = 1;
+		}
+		wt_longstatus_print_unmerged_data(s, it);
+	}
+	if (shown_header)
+		wt_longstatus_print_trailer(s);
+
+}
+
+static void wt_longstatus_print_updated(struct wt_status *s)
+{
+	int shown_header = 0;
+	int i;
+
+	for (i = 0; i < s->change.nr; i++) {
+		struct wt_status_change_data *d;
+		struct string_list_item *it;
+		it = &(s->change.items[i]);
+		d = it->util;
+		if (!d->index_status ||
+		    d->index_status == DIFF_STATUS_UNMERGED)
+			continue;
+		if (!shown_header) {
+			wt_longstatus_print_cached_header(s);
+			shown_header = 1;
+		}
+		wt_longstatus_print_change_data(s, WT_STATUS_UPDATED, it);
+	}
+	if (shown_header)
+		wt_longstatus_print_trailer(s);
+}
+
+/*
+ * -1 : has delete
+ *  0 : no change
+ *  1 : some change but no delete
+ */
+static int wt_status_check_worktree_changes(struct wt_status *s,
+					     int *dirty_submodules)
+{
+	int i;
+	int changes = 0;
+
+	*dirty_submodules = 0;
+
+	for (i = 0; i < s->change.nr; i++) {
+		struct wt_status_change_data *d;
+		d = s->change.items[i].util;
+		if (!d->worktree_status ||
+		    d->worktree_status == DIFF_STATUS_UNMERGED)
+			continue;
+		if (!changes)
+			changes = 1;
+		if (d->dirty_submodule)
+			*dirty_submodules = 1;
+		if (d->worktree_status == DIFF_STATUS_DELETED)
+			changes = -1;
+	}
+	return changes;
+}
+
+static void wt_longstatus_print_changed(struct wt_status *s)
+{
+	int i, dirty_submodules;
+	int worktree_changes = wt_status_check_worktree_changes(s, &dirty_submodules);
+
+	if (!worktree_changes)
+		return;
+
+	wt_longstatus_print_dirty_header(s, worktree_changes < 0, dirty_submodules);
+
+	for (i = 0; i < s->change.nr; i++) {
+		struct wt_status_change_data *d;
+		struct string_list_item *it;
+		it = &(s->change.items[i]);
+		d = it->util;
+		if (!d->worktree_status ||
+		    d->worktree_status == DIFF_STATUS_UNMERGED)
+			continue;
+		wt_longstatus_print_change_data(s, WT_STATUS_CHANGED, it);
+	}
+	wt_longstatus_print_trailer(s);
+}
+
+static int stash_count_refs(struct object_id *ooid, struct object_id *noid,
+			    const char *email, timestamp_t timestamp, int tz,
+			    const char *message, void *cb_data)
+{
+	int *c = cb_data;
+	(*c)++;
+	return 0;
+}
+
+static void wt_longstatus_print_stash_summary(struct wt_status *s)
+{
+	int stash_count = 0;
+
+	for_each_reflog_ent("refs/stash", stash_count_refs, &stash_count);
+	if (stash_count > 0)
+		status_printf_ln(s, GIT_COLOR_NORMAL,
+				 Q_("Your stash currently has %d entry",
+				    "Your stash currently has %d entries", stash_count),
+				 stash_count);
+}
+
+static void wt_longstatus_print_submodule_summary(struct wt_status *s, int uncommitted)
+{
+	struct child_process sm_summary = CHILD_PROCESS_INIT;
+	struct strbuf cmd_stdout = STRBUF_INIT;
+	struct strbuf summary = STRBUF_INIT;
+	char *summary_content;
+
+	argv_array_pushf(&sm_summary.env_array, "GIT_INDEX_FILE=%s",
+			 s->index_file);
+
+	argv_array_push(&sm_summary.args, "submodule");
+	argv_array_push(&sm_summary.args, "summary");
+	argv_array_push(&sm_summary.args, uncommitted ? "--files" : "--cached");
+	argv_array_push(&sm_summary.args, "--for-status");
+	argv_array_push(&sm_summary.args, "--summary-limit");
+	argv_array_pushf(&sm_summary.args, "%d", s->submodule_summary);
+	if (!uncommitted)
+		argv_array_push(&sm_summary.args, s->amend ? "HEAD^" : "HEAD");
+
+	sm_summary.git_cmd = 1;
+	sm_summary.no_stdin = 1;
+
+	capture_command(&sm_summary, &cmd_stdout, 1024);
+
+	/* prepend header, only if there's an actual output */
+	if (cmd_stdout.len) {
+		if (uncommitted)
+			strbuf_addstr(&summary, _("Submodules changed but not updated:"));
+		else
+			strbuf_addstr(&summary, _("Submodule changes to be committed:"));
+		strbuf_addstr(&summary, "\n\n");
+	}
+	strbuf_addbuf(&summary, &cmd_stdout);
+	strbuf_release(&cmd_stdout);
+
+	if (s->display_comment_prefix) {
+		size_t len;
+		summary_content = strbuf_detach(&summary, &len);
+		strbuf_add_commented_lines(&summary, summary_content, len);
+		free(summary_content);
+	}
+
+	fputs(summary.buf, s->fp);
+	strbuf_release(&summary);
+}
+
+static void wt_longstatus_print_other(struct wt_status *s,
+				      struct string_list *l,
+				      const char *what,
+				      const char *how)
+{
+	int i;
+	struct strbuf buf = STRBUF_INIT;
+	static struct string_list output = STRING_LIST_INIT_DUP;
+	struct column_options copts;
+
+	if (!l->nr)
+		return;
+
+	wt_longstatus_print_other_header(s, what, how);
+
+	for (i = 0; i < l->nr; i++) {
+		struct string_list_item *it;
+		const char *path;
+		it = &(l->items[i]);
+		path = quote_path(it->string, s->prefix, &buf);
+		if (column_active(s->colopts)) {
+			string_list_append(&output, path);
+			continue;
+		}
+		status_printf(s, color(WT_STATUS_HEADER, s), "\t");
+		status_printf_more(s, color(WT_STATUS_UNTRACKED, s),
+				   "%s\n", path);
+	}
+
+	strbuf_release(&buf);
+	if (!column_active(s->colopts))
+		goto conclude;
+
+	strbuf_addf(&buf, "%s%s\t%s",
+		    color(WT_STATUS_HEADER, s),
+		    s->display_comment_prefix ? "#" : "",
+		    color(WT_STATUS_UNTRACKED, s));
+	memset(&copts, 0, sizeof(copts));
+	copts.padding = 1;
+	copts.indent = buf.buf;
+	if (want_color(s->use_color))
+		copts.nl = GIT_COLOR_RESET "\n";
+	print_columns(&output, s->colopts, &copts);
+	string_list_clear(&output, 0);
+	strbuf_release(&buf);
+conclude:
+	status_printf_ln(s, GIT_COLOR_NORMAL, "%s", "");
+}
+
+size_t wt_status_locate_end(const char *s, size_t len)
+{
+	const char *p;
+	struct strbuf pattern = STRBUF_INIT;
+
+	strbuf_addf(&pattern, "\n%c %s", comment_line_char, cut_line);
+	if (starts_with(s, pattern.buf + 1))
+		len = 0;
+	else if ((p = strstr(s, pattern.buf)))
+		len = p - s + 1;
+	strbuf_release(&pattern);
+	return len;
+}
+
+void wt_status_append_cut_line(struct strbuf *buf)
+{
+	const char *explanation = _("Do not modify or remove the line above.\nEverything below it will be ignored.");
+
+	strbuf_commented_addf(buf, "%s", cut_line);
+	strbuf_add_commented_lines(buf, explanation, strlen(explanation));
+}
+
+void wt_status_add_cut_line(FILE *fp)
+{
+	struct strbuf buf = STRBUF_INIT;
+
+	wt_status_append_cut_line(&buf);
+	fputs(buf.buf, fp);
+	strbuf_release(&buf);
+}
+
+static void wt_longstatus_print_verbose(struct wt_status *s)
+{
+	struct rev_info rev;
+	struct setup_revision_opt opt;
+	int dirty_submodules;
+	const char *c = color(WT_STATUS_HEADER, s);
+
+	repo_init_revisions(s->repo, &rev, NULL);
+	rev.diffopt.flags.allow_textconv = 1;
+	rev.diffopt.ita_invisible_in_index = 1;
+
+	memset(&opt, 0, sizeof(opt));
+	opt.def = s->is_initial ? empty_tree_oid_hex() : s->reference;
+	setup_revisions(0, NULL, &rev, &opt);
+
+	rev.diffopt.output_format |= DIFF_FORMAT_PATCH;
+	rev.diffopt.detect_rename = s->detect_rename >= 0 ? s->detect_rename : rev.diffopt.detect_rename;
+	rev.diffopt.rename_limit = s->rename_limit >= 0 ? s->rename_limit : rev.diffopt.rename_limit;
+	rev.diffopt.rename_score = s->rename_score >= 0 ? s->rename_score : rev.diffopt.rename_score;
+	rev.diffopt.file = s->fp;
+	rev.diffopt.close_file = 0;
+	/*
+	 * If we're not going to stdout, then we definitely don't
+	 * want color, since we are going to the commit message
+	 * file (and even the "auto" setting won't work, since it
+	 * will have checked isatty on stdout). But we then do want
+	 * to insert the scissor line here to reliably remove the
+	 * diff before committing.
+	 */
+	if (s->fp != stdout) {
+		rev.diffopt.use_color = 0;
+		wt_status_add_cut_line(s->fp);
+	}
+	if (s->verbose > 1 && s->committable) {
+		/* print_updated() printed a header, so do we */
+		if (s->fp != stdout)
+			wt_longstatus_print_trailer(s);
+		status_printf_ln(s, c, _("Changes to be committed:"));
+		rev.diffopt.a_prefix = "c/";
+		rev.diffopt.b_prefix = "i/";
+	} /* else use prefix as per user config */
+	run_diff_index(&rev, 1);
+	if (s->verbose > 1 &&
+	    wt_status_check_worktree_changes(s, &dirty_submodules)) {
+		status_printf_ln(s, c,
+			"--------------------------------------------------");
+		status_printf_ln(s, c, _("Changes not staged for commit:"));
+		setup_work_tree();
+		rev.diffopt.a_prefix = "i/";
+		rev.diffopt.b_prefix = "w/";
+		run_diff_files(&rev, 0);
+	}
+}
+
+static void wt_longstatus_print_tracking(struct wt_status *s)
+{
+	struct strbuf sb = STRBUF_INIT;
+	const char *cp, *ep, *branch_name;
+	struct branch *branch;
+	char comment_line_string[3];
+	int i;
+	uint64_t t_begin = 0;
+
+	assert(s->branch && !s->is_initial);
+	if (!skip_prefix(s->branch, "refs/heads/", &branch_name))
+		return;
+	branch = branch_get(branch_name);
+
+	t_begin = getnanotime();
+
+	if (!format_tracking_info(branch, &sb, s->ahead_behind_flags))
+		return;
+
+	if (advice_status_ahead_behind_warning &&
+	    s->ahead_behind_flags == AHEAD_BEHIND_FULL) {
+		uint64_t t_delta_in_ms = (getnanotime() - t_begin) / 1000000;
+		if (t_delta_in_ms > AB_DELAY_WARNING_IN_MS) {
+			strbuf_addf(&sb, _("\n"
+					   "It took %.2f seconds to compute the branch ahead/behind values.\n"
+					   "You can use '--no-ahead-behind' to avoid this.\n"),
+				    t_delta_in_ms / 1000.0);
+		}
+	}
+
+	i = 0;
+	if (s->display_comment_prefix) {
+		comment_line_string[i++] = comment_line_char;
+		comment_line_string[i++] = ' ';
+	}
+	comment_line_string[i] = '\0';
+
+	for (cp = sb.buf; (ep = strchr(cp, '\n')) != NULL; cp = ep + 1)
+		color_fprintf_ln(s->fp, color(WT_STATUS_HEADER, s),
+				 "%s%.*s", comment_line_string,
+				 (int)(ep - cp), cp);
+	if (s->display_comment_prefix)
+		color_fprintf_ln(s->fp, color(WT_STATUS_HEADER, s), "%c",
+				 comment_line_char);
+	else
+		fputs("\n", s->fp);
+	strbuf_release(&sb);
+}
+
+static void show_merge_in_progress(struct wt_status *s,
+				   const char *color)
+{
+	if (has_unmerged(s)) {
+		status_printf_ln(s, color, _("You have unmerged paths."));
+		if (s->hints) {
+			status_printf_ln(s, color,
+					 _("  (fix conflicts and run \"git commit\")"));
+			status_printf_ln(s, color,
+					 _("  (use \"git merge --abort\" to abort the merge)"));
+		}
+	} else {
+		status_printf_ln(s, color,
+			_("All conflicts fixed but you are still merging."));
+		if (s->hints)
+			status_printf_ln(s, color,
+				_("  (use \"git commit\" to conclude merge)"));
+	}
+	wt_longstatus_print_trailer(s);
+}
+
+static void show_am_in_progress(struct wt_status *s,
+				const char *color)
+{
+	status_printf_ln(s, color,
+		_("You are in the middle of an am session."));
+	if (s->state.am_empty_patch)
+		status_printf_ln(s, color,
+			_("The current patch is empty."));
+	if (s->hints) {
+		if (!s->state.am_empty_patch)
+			status_printf_ln(s, color,
+				_("  (fix conflicts and then run \"git am --continue\")"));
+		status_printf_ln(s, color,
+			_("  (use \"git am --skip\" to skip this patch)"));
+		status_printf_ln(s, color,
+			_("  (use \"git am --abort\" to restore the original branch)"));
+	}
+	wt_longstatus_print_trailer(s);
+}
+
+static char *read_line_from_git_path(const char *filename)
+{
+	struct strbuf buf = STRBUF_INIT;
+	FILE *fp = fopen_or_warn(git_path("%s", filename), "r");
+
+	if (!fp) {
+		strbuf_release(&buf);
+		return NULL;
+	}
+	strbuf_getline_lf(&buf, fp);
+	if (!fclose(fp)) {
+		return strbuf_detach(&buf, NULL);
+	} else {
+		strbuf_release(&buf);
+		return NULL;
+	}
+}
+
+static int split_commit_in_progress(struct wt_status *s)
+{
+	int split_in_progress = 0;
+	char *head, *orig_head, *rebase_amend, *rebase_orig_head;
+
+	if ((!s->amend && !s->nowarn && !s->workdir_dirty) ||
+	    !s->branch || strcmp(s->branch, "HEAD"))
+		return 0;
+
+	head = read_line_from_git_path("HEAD");
+	orig_head = read_line_from_git_path("ORIG_HEAD");
+	rebase_amend = read_line_from_git_path("rebase-merge/amend");
+	rebase_orig_head = read_line_from_git_path("rebase-merge/orig-head");
+
+	if (!head || !orig_head || !rebase_amend || !rebase_orig_head)
+		; /* fall through, no split in progress */
+	else if (!strcmp(rebase_amend, rebase_orig_head))
+		split_in_progress = !!strcmp(head, rebase_amend);
+	else if (strcmp(orig_head, rebase_orig_head))
+		split_in_progress = 1;
+
+	free(head);
+	free(orig_head);
+	free(rebase_amend);
+	free(rebase_orig_head);
+
+	return split_in_progress;
+}
+
+/*
+ * Turn
+ * "pick d6a2f0303e897ec257dd0e0a39a5ccb709bc2047 some message"
+ * into
+ * "pick d6a2f03 some message"
+ *
+ * The function assumes that the line does not contain useless spaces
+ * before or after the command.
+ */
+static void abbrev_sha1_in_line(struct strbuf *line)
+{
+	struct strbuf **split;
+	int i;
+
+	if (starts_with(line->buf, "exec ") ||
+	    starts_with(line->buf, "x ") ||
+	    starts_with(line->buf, "label ") ||
+	    starts_with(line->buf, "l "))
+		return;
+
+	split = strbuf_split_max(line, ' ', 3);
+	if (split[0] && split[1]) {
+		struct object_id oid;
+
+		/*
+		 * strbuf_split_max left a space. Trim it and re-add
+		 * it after abbreviation.
+		 */
+		strbuf_trim(split[1]);
+		if (!get_oid(split[1]->buf, &oid)) {
+			strbuf_reset(split[1]);
+			strbuf_add_unique_abbrev(split[1], &oid,
+						 DEFAULT_ABBREV);
+			strbuf_addch(split[1], ' ');
+			strbuf_reset(line);
+			for (i = 0; split[i]; i++)
+				strbuf_addbuf(line, split[i]);
+		}
+	}
+	strbuf_list_free(split);
+}
+
+static int read_rebase_todolist(const char *fname, struct string_list *lines)
+{
+	struct strbuf line = STRBUF_INIT;
+	FILE *f = fopen(git_path("%s", fname), "r");
+
+	if (!f) {
+		if (errno == ENOENT)
+			return -1;
+		die_errno("Could not open file %s for reading",
+			  git_path("%s", fname));
+	}
+	while (!strbuf_getline_lf(&line, f)) {
+		if (line.len && line.buf[0] == comment_line_char)
+			continue;
+		strbuf_trim(&line);
+		if (!line.len)
+			continue;
+		abbrev_sha1_in_line(&line);
+		string_list_append(lines, line.buf);
+	}
+	fclose(f);
+	strbuf_release(&line);
+	return 0;
+}
+
+static void show_rebase_information(struct wt_status *s,
+				    const char *color)
+{
+	if (s->state.rebase_interactive_in_progress) {
+		int i;
+		int nr_lines_to_show = 2;
+
+		struct string_list have_done = STRING_LIST_INIT_DUP;
+		struct string_list yet_to_do = STRING_LIST_INIT_DUP;
+
+		read_rebase_todolist("rebase-merge/done", &have_done);
+		if (read_rebase_todolist("rebase-merge/git-rebase-todo",
+					 &yet_to_do))
+			status_printf_ln(s, color,
+				_("git-rebase-todo is missing."));
+		if (have_done.nr == 0)
+			status_printf_ln(s, color, _("No commands done."));
+		else {
+			status_printf_ln(s, color,
+				Q_("Last command done (%d command done):",
+					"Last commands done (%d commands done):",
+					have_done.nr),
+				have_done.nr);
+			for (i = (have_done.nr > nr_lines_to_show)
+				? have_done.nr - nr_lines_to_show : 0;
+				i < have_done.nr;
+				i++)
+				status_printf_ln(s, color, "   %s", have_done.items[i].string);
+			if (have_done.nr > nr_lines_to_show && s->hints)
+				status_printf_ln(s, color,
+					_("  (see more in file %s)"), git_path("rebase-merge/done"));
+		}
+
+		if (yet_to_do.nr == 0)
+			status_printf_ln(s, color,
+					 _("No commands remaining."));
+		else {
+			status_printf_ln(s, color,
+				Q_("Next command to do (%d remaining command):",
+					"Next commands to do (%d remaining commands):",
+					yet_to_do.nr),
+				yet_to_do.nr);
+			for (i = 0; i < nr_lines_to_show && i < yet_to_do.nr; i++)
+				status_printf_ln(s, color, "   %s", yet_to_do.items[i].string);
+			if (s->hints)
+				status_printf_ln(s, color,
+					_("  (use \"git rebase --edit-todo\" to view and edit)"));
+		}
+		string_list_clear(&yet_to_do, 0);
+		string_list_clear(&have_done, 0);
+	}
+}
+
+static void print_rebase_state(struct wt_status *s,
+			       const char *color)
+{
+	if (s->state.branch)
+		status_printf_ln(s, color,
+				 _("You are currently rebasing branch '%s' on '%s'."),
+				 s->state.branch,
+				 s->state.onto);
+	else
+		status_printf_ln(s, color,
+				 _("You are currently rebasing."));
+}
+
+static void show_rebase_in_progress(struct wt_status *s,
+				    const char *color)
+{
+	struct stat st;
+
+	show_rebase_information(s, color);
+	if (has_unmerged(s)) {
+		print_rebase_state(s, color);
+		if (s->hints) {
+			status_printf_ln(s, color,
+				_("  (fix conflicts and then run \"git rebase --continue\")"));
+			status_printf_ln(s, color,
+				_("  (use \"git rebase --skip\" to skip this patch)"));
+			status_printf_ln(s, color,
+				_("  (use \"git rebase --abort\" to check out the original branch)"));
+		}
+	} else if (s->state.rebase_in_progress ||
+		   !stat(git_path_merge_msg(s->repo), &st)) {
+		print_rebase_state(s, color);
+		if (s->hints)
+			status_printf_ln(s, color,
+				_("  (all conflicts fixed: run \"git rebase --continue\")"));
+	} else if (split_commit_in_progress(s)) {
+		if (s->state.branch)
+			status_printf_ln(s, color,
+					 _("You are currently splitting a commit while rebasing branch '%s' on '%s'."),
+					 s->state.branch,
+					 s->state.onto);
+		else
+			status_printf_ln(s, color,
+					 _("You are currently splitting a commit during a rebase."));
+		if (s->hints)
+			status_printf_ln(s, color,
+				_("  (Once your working directory is clean, run \"git rebase --continue\")"));
+	} else {
+		if (s->state.branch)
+			status_printf_ln(s, color,
+					 _("You are currently editing a commit while rebasing branch '%s' on '%s'."),
+					 s->state.branch,
+					 s->state.onto);
+		else
+			status_printf_ln(s, color,
+					 _("You are currently editing a commit during a rebase."));
+		if (s->hints && !s->amend) {
+			status_printf_ln(s, color,
+				_("  (use \"git commit --amend\" to amend the current commit)"));
+			status_printf_ln(s, color,
+				_("  (use \"git rebase --continue\" once you are satisfied with your changes)"));
+		}
+	}
+	wt_longstatus_print_trailer(s);
+}
+
+static void show_cherry_pick_in_progress(struct wt_status *s,
+					 const char *color)
+{
+	if (is_null_oid(&s->state.cherry_pick_head_oid))
+		status_printf_ln(s, color,
+			_("Cherry-pick currently in progress."));
+	else
+		status_printf_ln(s, color,
+			_("You are currently cherry-picking commit %s."),
+			find_unique_abbrev(&s->state.cherry_pick_head_oid,
+					   DEFAULT_ABBREV));
+
+	if (s->hints) {
+		if (has_unmerged(s))
+			status_printf_ln(s, color,
+				_("  (fix conflicts and run \"git cherry-pick --continue\")"));
+		else if (is_null_oid(&s->state.cherry_pick_head_oid))
+			status_printf_ln(s, color,
+				_("  (run \"git cherry-pick --continue\" to continue)"));
+		else
+			status_printf_ln(s, color,
+				_("  (all conflicts fixed: run \"git cherry-pick --continue\")"));
+		status_printf_ln(s, color,
+			_("  (use \"git cherry-pick --abort\" to cancel the cherry-pick operation)"));
+	}
+	wt_longstatus_print_trailer(s);
+}
+
+static void show_revert_in_progress(struct wt_status *s,
+				    const char *color)
+{
+	if (is_null_oid(&s->state.revert_head_oid))
+		status_printf_ln(s, color,
+			_("Revert currently in progress."));
+	else
+		status_printf_ln(s, color,
+			_("You are currently reverting commit %s."),
+			find_unique_abbrev(&s->state.revert_head_oid,
+					   DEFAULT_ABBREV));
+	if (s->hints) {
+		if (has_unmerged(s))
+			status_printf_ln(s, color,
+				_("  (fix conflicts and run \"git revert --continue\")"));
+		else if (is_null_oid(&s->state.revert_head_oid))
+			status_printf_ln(s, color,
+				_("  (run \"git revert --continue\" to continue)"));
+		else
+			status_printf_ln(s, color,
+				_("  (all conflicts fixed: run \"git revert --continue\")"));
+		status_printf_ln(s, color,
+			_("  (use \"git revert --abort\" to cancel the revert operation)"));
+	}
+	wt_longstatus_print_trailer(s);
+}
+
+static void show_bisect_in_progress(struct wt_status *s,
+				    const char *color)
+{
+	if (s->state.branch)
+		status_printf_ln(s, color,
+				 _("You are currently bisecting, started from branch '%s'."),
+				 s->state.branch);
+	else
+		status_printf_ln(s, color,
+				 _("You are currently bisecting."));
+	if (s->hints)
+		status_printf_ln(s, color,
+			_("  (use \"git bisect reset\" to get back to the original branch)"));
+	wt_longstatus_print_trailer(s);
+}
+
+/*
+ * Extract branch information from rebase/bisect
+ */
+static char *get_branch(const struct worktree *wt, const char *path)
+{
+	struct strbuf sb = STRBUF_INIT;
+	struct object_id oid;
+	const char *branch_name;
+
+	if (strbuf_read_file(&sb, worktree_git_path(wt, "%s", path), 0) <= 0)
+		goto got_nothing;
+
+	while (sb.len && sb.buf[sb.len - 1] == '\n')
+		strbuf_setlen(&sb, sb.len - 1);
+	if (!sb.len)
+		goto got_nothing;
+	if (skip_prefix(sb.buf, "refs/heads/", &branch_name))
+		strbuf_remove(&sb, 0, branch_name - sb.buf);
+	else if (starts_with(sb.buf, "refs/"))
+		;
+	else if (!get_oid_hex(sb.buf, &oid)) {
+		strbuf_reset(&sb);
+		strbuf_add_unique_abbrev(&sb, &oid, DEFAULT_ABBREV);
+	} else if (!strcmp(sb.buf, "detached HEAD")) /* rebase */
+		goto got_nothing;
+	else			/* bisect */
+		;
+	return strbuf_detach(&sb, NULL);
+
+got_nothing:
+	strbuf_release(&sb);
+	return NULL;
+}
+
+struct grab_1st_switch_cbdata {
+	struct strbuf buf;
+	struct object_id noid;
+};
+
+static int grab_1st_switch(struct object_id *ooid, struct object_id *noid,
+			   const char *email, timestamp_t timestamp, int tz,
+			   const char *message, void *cb_data)
+{
+	struct grab_1st_switch_cbdata *cb = cb_data;
+	const char *target = NULL, *end;
+
+	if (!skip_prefix(message, "checkout: moving from ", &message))
+		return 0;
+	target = strstr(message, " to ");
+	if (!target)
+		return 0;
+	target += strlen(" to ");
+	strbuf_reset(&cb->buf);
+	oidcpy(&cb->noid, noid);
+	end = strchrnul(target, '\n');
+	strbuf_add(&cb->buf, target, end - target);
+	if (!strcmp(cb->buf.buf, "HEAD")) {
+		/* HEAD is relative. Resolve it to the right reflog entry. */
+		strbuf_reset(&cb->buf);
+		strbuf_add_unique_abbrev(&cb->buf, noid, DEFAULT_ABBREV);
+	}
+	return 1;
+}
+
+static void wt_status_get_detached_from(struct repository *r,
+					struct wt_status_state *state)
+{
+	struct grab_1st_switch_cbdata cb;
+	struct commit *commit;
+	struct object_id oid;
+	char *ref = NULL;
+
+	strbuf_init(&cb.buf, 0);
+	if (for_each_reflog_ent_reverse("HEAD", grab_1st_switch, &cb) <= 0) {
+		strbuf_release(&cb.buf);
+		return;
+	}
+
+	if (dwim_ref(cb.buf.buf, cb.buf.len, &oid, &ref) == 1 &&
+	    /* sha1 is a commit? match without further lookup */
+	    (oideq(&cb.noid, &oid) ||
+	     /* perhaps sha1 is a tag, try to dereference to a commit */
+	     ((commit = lookup_commit_reference_gently(r, &oid, 1)) != NULL &&
+	      oideq(&cb.noid, &commit->object.oid)))) {
+		const char *from = ref;
+		if (!skip_prefix(from, "refs/tags/", &from))
+			skip_prefix(from, "refs/remotes/", &from);
+		state->detached_from = xstrdup(from);
+	} else
+		state->detached_from =
+			xstrdup(find_unique_abbrev(&cb.noid, DEFAULT_ABBREV));
+	oidcpy(&state->detached_oid, &cb.noid);
+	state->detached_at = !get_oid("HEAD", &oid) &&
+			     oideq(&oid, &state->detached_oid);
+
+	free(ref);
+	strbuf_release(&cb.buf);
+}
+
+int wt_status_check_rebase(const struct worktree *wt,
+			   struct wt_status_state *state)
+{
+	struct stat st;
+
+	if (!stat(worktree_git_path(wt, "rebase-apply"), &st)) {
+		if (!stat(worktree_git_path(wt, "rebase-apply/applying"), &st)) {
+			state->am_in_progress = 1;
+			if (!stat(worktree_git_path(wt, "rebase-apply/patch"), &st) && !st.st_size)
+				state->am_empty_patch = 1;
+		} else {
+			state->rebase_in_progress = 1;
+			state->branch = get_branch(wt, "rebase-apply/head-name");
+			state->onto = get_branch(wt, "rebase-apply/onto");
+		}
+	} else if (!stat(worktree_git_path(wt, "rebase-merge"), &st)) {
+		if (!stat(worktree_git_path(wt, "rebase-merge/interactive"), &st))
+			state->rebase_interactive_in_progress = 1;
+		else
+			state->rebase_in_progress = 1;
+		state->branch = get_branch(wt, "rebase-merge/head-name");
+		state->onto = get_branch(wt, "rebase-merge/onto");
+	} else
+		return 0;
+	return 1;
+}
+
+int wt_status_check_bisect(const struct worktree *wt,
+			   struct wt_status_state *state)
+{
+	struct stat st;
+
+	if (!stat(worktree_git_path(wt, "BISECT_LOG"), &st)) {
+		state->bisect_in_progress = 1;
+		state->branch = get_branch(wt, "BISECT_START");
+		return 1;
+	}
+	return 0;
+}
+
+void wt_status_get_state(struct repository *r,
+			 struct wt_status_state *state,
+			 int get_detached_from)
+{
+	struct stat st;
+	struct object_id oid;
+	enum replay_action action;
+
+	if (!stat(git_path_merge_head(r), &st)) {
+		wt_status_check_rebase(NULL, state);
+		state->merge_in_progress = 1;
+	} else if (wt_status_check_rebase(NULL, state)) {
+		;		/* all set */
+	} else if (!stat(git_path_cherry_pick_head(r), &st) &&
+			!get_oid("CHERRY_PICK_HEAD", &oid)) {
+		state->cherry_pick_in_progress = 1;
+		oidcpy(&state->cherry_pick_head_oid, &oid);
+	}
+	wt_status_check_bisect(NULL, state);
+	if (!stat(git_path_revert_head(r), &st) &&
+	    !get_oid("REVERT_HEAD", &oid)) {
+		state->revert_in_progress = 1;
+		oidcpy(&state->revert_head_oid, &oid);
+	}
+	if (!sequencer_get_last_command(r, &action)) {
+		if (action == REPLAY_PICK) {
+			state->cherry_pick_in_progress = 1;
+			oidcpy(&state->cherry_pick_head_oid, &null_oid);
+		} else {
+			state->revert_in_progress = 1;
+			oidcpy(&state->revert_head_oid, &null_oid);
+		}
+	}
+	if (get_detached_from)
+		wt_status_get_detached_from(r, state);
+}
+
+static void wt_longstatus_print_state(struct wt_status *s)
+{
+	const char *state_color = color(WT_STATUS_HEADER, s);
+	struct wt_status_state *state = &s->state;
+
+	if (state->merge_in_progress) {
+		if (state->rebase_interactive_in_progress) {
+			show_rebase_information(s, state_color);
+			fputs("\n", s->fp);
+		}
+		show_merge_in_progress(s, state_color);
+	} else if (state->am_in_progress)
+		show_am_in_progress(s, state_color);
+	else if (state->rebase_in_progress || state->rebase_interactive_in_progress)
+		show_rebase_in_progress(s, state_color);
+	else if (state->cherry_pick_in_progress)
+		show_cherry_pick_in_progress(s, state_color);
+	else if (state->revert_in_progress)
+		show_revert_in_progress(s, state_color);
+	if (state->bisect_in_progress)
+		show_bisect_in_progress(s, state_color);
+}
+
+static void wt_longstatus_print(struct wt_status *s)
+{
+	const char *branch_color = color(WT_STATUS_ONBRANCH, s);
+	const char *branch_status_color = color(WT_STATUS_HEADER, s);
+
+	if (s->branch) {
+		const char *on_what = _("On branch ");
+		const char *branch_name = s->branch;
+		if (!strcmp(branch_name, "HEAD")) {
+			branch_status_color = color(WT_STATUS_NOBRANCH, s);
+			if (s->state.rebase_in_progress ||
+			    s->state.rebase_interactive_in_progress) {
+				if (s->state.rebase_interactive_in_progress)
+					on_what = _("interactive rebase in progress; onto ");
+				else
+					on_what = _("rebase in progress; onto ");
+				branch_name = s->state.onto;
+			} else if (s->state.detached_from) {
+				branch_name = s->state.detached_from;
+				if (s->state.detached_at)
+					on_what = HEAD_DETACHED_AT;
+				else
+					on_what = HEAD_DETACHED_FROM;
+			} else {
+				branch_name = "";
+				on_what = _("Not currently on any branch.");
+			}
+		} else
+			skip_prefix(branch_name, "refs/heads/", &branch_name);
+		status_printf(s, color(WT_STATUS_HEADER, s), "%s", "");
+		status_printf_more(s, branch_status_color, "%s", on_what);
+		status_printf_more(s, branch_color, "%s\n", branch_name);
+		if (!s->is_initial)
+			wt_longstatus_print_tracking(s);
+	}
+
+	wt_longstatus_print_state(s);
+
+	if (s->is_initial) {
+		status_printf_ln(s, color(WT_STATUS_HEADER, s), "%s", "");
+		status_printf_ln(s, color(WT_STATUS_HEADER, s),
+				 s->commit_template
+				 ? _("Initial commit")
+				 : _("No commits yet"));
+		status_printf_ln(s, color(WT_STATUS_HEADER, s), "%s", "");
+	}
+
+	wt_longstatus_print_updated(s);
+	wt_longstatus_print_unmerged(s);
+	wt_longstatus_print_changed(s);
+	if (s->submodule_summary &&
+	    (!s->ignore_submodule_arg ||
+	     strcmp(s->ignore_submodule_arg, "all"))) {
+		wt_longstatus_print_submodule_summary(s, 0);  /* staged */
+		wt_longstatus_print_submodule_summary(s, 1);  /* unstaged */
+	}
+	if (s->show_untracked_files) {
+		wt_longstatus_print_other(s, &s->untracked, _("Untracked files"), "add");
+		if (s->show_ignored_mode)
+			wt_longstatus_print_other(s, &s->ignored, _("Ignored files"), "add -f");
+		if (advice_status_u_option && 2000 < s->untracked_in_ms) {
+			status_printf_ln(s, GIT_COLOR_NORMAL, "%s", "");
+			status_printf_ln(s, GIT_COLOR_NORMAL,
+					 _("It took %.2f seconds to enumerate untracked files. 'status -uno'\n"
+					   "may speed it up, but you have to be careful not to forget to add\n"
+					   "new files yourself (see 'git help status')."),
+					 s->untracked_in_ms / 1000.0);
+		}
+	} else if (s->committable)
+		status_printf_ln(s, GIT_COLOR_NORMAL, _("Untracked files not listed%s"),
+			s->hints
+			? _(" (use -u option to show untracked files)") : "");
+
+	if (s->verbose)
+		wt_longstatus_print_verbose(s);
+	if (!s->committable) {
+		if (s->amend)
+			status_printf_ln(s, GIT_COLOR_NORMAL, _("No changes"));
+		else if (s->nowarn)
+			; /* nothing */
+		else if (s->workdir_dirty) {
+			if (s->hints)
+				printf(_("no changes added to commit "
+					 "(use \"git add\" and/or \"git commit -a\")\n"));
+			else
+				printf(_("no changes added to commit\n"));
+		} else if (s->untracked.nr) {
+			if (s->hints)
+				printf(_("nothing added to commit but untracked files "
+					 "present (use \"git add\" to track)\n"));
+			else
+				printf(_("nothing added to commit but untracked files present\n"));
+		} else if (s->is_initial) {
+			if (s->hints)
+				printf(_("nothing to commit (create/copy files "
+					 "and use \"git add\" to track)\n"));
+			else
+				printf(_("nothing to commit\n"));
+		} else if (!s->show_untracked_files) {
+			if (s->hints)
+				printf(_("nothing to commit (use -u to show untracked files)\n"));
+			else
+				printf(_("nothing to commit\n"));
+		} else
+			printf(_("nothing to commit, working tree clean\n"));
+	}
+	if(s->show_stash)
+		wt_longstatus_print_stash_summary(s);
+}
+
+static void wt_shortstatus_unmerged(struct string_list_item *it,
+			   struct wt_status *s)
+{
+	struct wt_status_change_data *d = it->util;
+	const char *how = "??";
+
+	switch (d->stagemask) {
+	case 1: how = "DD"; break; /* both deleted */
+	case 2: how = "AU"; break; /* added by us */
+	case 3: how = "UD"; break; /* deleted by them */
+	case 4: how = "UA"; break; /* added by them */
+	case 5: how = "DU"; break; /* deleted by us */
+	case 6: how = "AA"; break; /* both added */
+	case 7: how = "UU"; break; /* both modified */
+	}
+	color_fprintf(s->fp, color(WT_STATUS_UNMERGED, s), "%s", how);
+	if (s->null_termination) {
+		fprintf(stdout, " %s%c", it->string, 0);
+	} else {
+		struct strbuf onebuf = STRBUF_INIT;
+		const char *one;
+		one = quote_path(it->string, s->prefix, &onebuf);
+		printf(" %s\n", one);
+		strbuf_release(&onebuf);
+	}
+}
+
+static void wt_shortstatus_status(struct string_list_item *it,
+			 struct wt_status *s)
+{
+	struct wt_status_change_data *d = it->util;
+
+	if (d->index_status)
+		color_fprintf(s->fp, color(WT_STATUS_UPDATED, s), "%c", d->index_status);
+	else
+		putchar(' ');
+	if (d->worktree_status)
+		color_fprintf(s->fp, color(WT_STATUS_CHANGED, s), "%c", d->worktree_status);
+	else
+		putchar(' ');
+	putchar(' ');
+	if (s->null_termination) {
+		fprintf(stdout, "%s%c", it->string, 0);
+		if (d->rename_source)
+			fprintf(stdout, "%s%c", d->rename_source, 0);
+	} else {
+		struct strbuf onebuf = STRBUF_INIT;
+		const char *one;
+
+		if (d->rename_source) {
+			one = quote_path(d->rename_source, s->prefix, &onebuf);
+			if (*one != '"' && strchr(one, ' ') != NULL) {
+				putchar('"');
+				strbuf_addch(&onebuf, '"');
+				one = onebuf.buf;
+			}
+			printf("%s -> ", one);
+			strbuf_release(&onebuf);
+		}
+		one = quote_path(it->string, s->prefix, &onebuf);
+		if (*one != '"' && strchr(one, ' ') != NULL) {
+			putchar('"');
+			strbuf_addch(&onebuf, '"');
+			one = onebuf.buf;
+		}
+		printf("%s\n", one);
+		strbuf_release(&onebuf);
+	}
+}
+
+static void wt_shortstatus_other(struct string_list_item *it,
+				 struct wt_status *s, const char *sign)
+{
+	if (s->null_termination) {
+		fprintf(stdout, "%s %s%c", sign, it->string, 0);
+	} else {
+		struct strbuf onebuf = STRBUF_INIT;
+		const char *one;
+		one = quote_path(it->string, s->prefix, &onebuf);
+		color_fprintf(s->fp, color(WT_STATUS_UNTRACKED, s), "%s", sign);
+		printf(" %s\n", one);
+		strbuf_release(&onebuf);
+	}
+}
+
+static void wt_shortstatus_print_tracking(struct wt_status *s)
+{
+	struct branch *branch;
+	const char *header_color = color(WT_STATUS_HEADER, s);
+	const char *branch_color_local = color(WT_STATUS_LOCAL_BRANCH, s);
+	const char *branch_color_remote = color(WT_STATUS_REMOTE_BRANCH, s);
+
+	const char *base;
+	char *short_base;
+	const char *branch_name;
+	int num_ours, num_theirs, sti;
+	int upstream_is_gone = 0;
+
+	color_fprintf(s->fp, color(WT_STATUS_HEADER, s), "## ");
+
+	if (!s->branch)
+		return;
+	branch_name = s->branch;
+
+#define LABEL(string) (s->no_gettext ? (string) : _(string))
+
+	if (s->is_initial)
+		color_fprintf(s->fp, header_color, LABEL(N_("No commits yet on ")));
+
+	if (!strcmp(s->branch, "HEAD")) {
+		color_fprintf(s->fp, color(WT_STATUS_NOBRANCH, s), "%s",
+			      LABEL(N_("HEAD (no branch)")));
+		goto conclude;
+	}
+
+	skip_prefix(branch_name, "refs/heads/", &branch_name);
+
+	branch = branch_get(branch_name);
+
+	color_fprintf(s->fp, branch_color_local, "%s", branch_name);
+
+	sti = stat_tracking_info(branch, &num_ours, &num_theirs, &base,
+				 0, s->ahead_behind_flags);
+	if (sti < 0) {
+		if (!base)
+			goto conclude;
+
+		upstream_is_gone = 1;
+	}
+
+	short_base = shorten_unambiguous_ref(base, 0);
+	color_fprintf(s->fp, header_color, "...");
+	color_fprintf(s->fp, branch_color_remote, "%s", short_base);
+	free(short_base);
+
+	if (!upstream_is_gone && !sti)
+		goto conclude;
+
+	color_fprintf(s->fp, header_color, " [");
+	if (upstream_is_gone) {
+		color_fprintf(s->fp, header_color, LABEL(N_("gone")));
+	} else if (s->ahead_behind_flags == AHEAD_BEHIND_QUICK) {
+		color_fprintf(s->fp, header_color, LABEL(N_("different")));
+	} else if (!num_ours) {
+		color_fprintf(s->fp, header_color, LABEL(N_("behind ")));
+		color_fprintf(s->fp, branch_color_remote, "%d", num_theirs);
+	} else if (!num_theirs) {
+		color_fprintf(s->fp, header_color, LABEL(N_("ahead ")));
+		color_fprintf(s->fp, branch_color_local, "%d", num_ours);
+	} else {
+		color_fprintf(s->fp, header_color, LABEL(N_("ahead ")));
+		color_fprintf(s->fp, branch_color_local, "%d", num_ours);
+		color_fprintf(s->fp, header_color, ", %s", LABEL(N_("behind ")));
+		color_fprintf(s->fp, branch_color_remote, "%d", num_theirs);
+	}
+
+	color_fprintf(s->fp, header_color, "]");
+ conclude:
+	fputc(s->null_termination ? '\0' : '\n', s->fp);
+}
+
+static void wt_shortstatus_print(struct wt_status *s)
+{
+	struct string_list_item *it;
+
+	if (s->show_branch)
+		wt_shortstatus_print_tracking(s);
+
+	for_each_string_list_item(it, &s->change) {
+		struct wt_status_change_data *d = it->util;
+
+		if (d->stagemask)
+			wt_shortstatus_unmerged(it, s);
+		else
+			wt_shortstatus_status(it, s);
+	}
+	for_each_string_list_item(it, &s->untracked)
+		wt_shortstatus_other(it, s, "??");
+
+	for_each_string_list_item(it, &s->ignored)
+		wt_shortstatus_other(it, s, "!!");
+}
+
+static void wt_porcelain_print(struct wt_status *s)
+{
+	s->use_color = 0;
+	s->relative_paths = 0;
+	s->prefix = NULL;
+	s->no_gettext = 1;
+	wt_shortstatus_print(s);
+}
+
+/*
+ * Print branch information for porcelain v2 output.  These lines
+ * are printed when the '--branch' parameter is given.
+ *
+ *    # branch.oid <commit><eol>
+ *    # branch.head <head><eol>
+ *   [# branch.upstream <upstream><eol>
+ *   [# branch.ab +<ahead> -<behind><eol>]]
+ *
+ *      <commit> ::= the current commit hash or the the literal
+ *                   "(initial)" to indicate an initialized repo
+ *                   with no commits.
+ *
+ *        <head> ::= <branch_name> the current branch name or
+ *                   "(detached)" literal when detached head or
+ *                   "(unknown)" when something is wrong.
+ *
+ *    <upstream> ::= the upstream branch name, when set.
+ *
+ *       <ahead> ::= integer ahead value or '?'.
+ *
+ *      <behind> ::= integer behind value or '?'.
+ *
+ * The end-of-line is defined by the -z flag.
+ *
+ *                 <eol> ::= NUL when -z,
+ *                           LF when NOT -z.
+ *
+ * When an upstream is set and present, the 'branch.ab' line will
+ * be printed with the ahead/behind counts for the branch and the
+ * upstream.  When AHEAD_BEHIND_QUICK is requested and the branches
+ * are different, '?' will be substituted for the actual count.
+ */
+static void wt_porcelain_v2_print_tracking(struct wt_status *s)
+{
+	struct branch *branch;
+	const char *base;
+	const char *branch_name;
+	int ab_info, nr_ahead, nr_behind;
+	char eol = s->null_termination ? '\0' : '\n';
+
+	fprintf(s->fp, "# branch.oid %s%c",
+			(s->is_initial ? "(initial)" : sha1_to_hex(s->sha1_commit)),
+			eol);
+
+	if (!s->branch)
+		fprintf(s->fp, "# branch.head %s%c", "(unknown)", eol);
+	else {
+		if (!strcmp(s->branch, "HEAD")) {
+			fprintf(s->fp, "# branch.head %s%c", "(detached)", eol);
+
+			if (s->state.rebase_in_progress ||
+			    s->state.rebase_interactive_in_progress)
+				branch_name = s->state.onto;
+			else if (s->state.detached_from)
+				branch_name = s->state.detached_from;
+			else
+				branch_name = "";
+		} else {
+			branch_name = NULL;
+			skip_prefix(s->branch, "refs/heads/", &branch_name);
+
+			fprintf(s->fp, "# branch.head %s%c", branch_name, eol);
+		}
+
+		/* Lookup stats on the upstream tracking branch, if set. */
+		branch = branch_get(branch_name);
+		base = NULL;
+		ab_info = stat_tracking_info(branch, &nr_ahead, &nr_behind,
+					     &base, 0, s->ahead_behind_flags);
+		if (base) {
+			base = shorten_unambiguous_ref(base, 0);
+			fprintf(s->fp, "# branch.upstream %s%c", base, eol);
+			free((char *)base);
+
+			if (ab_info > 0) {
+				/* different */
+				if (nr_ahead || nr_behind)
+					fprintf(s->fp, "# branch.ab +%d -%d%c",
+						nr_ahead, nr_behind, eol);
+				else
+					fprintf(s->fp, "# branch.ab +? -?%c",
+						eol);
+			} else if (!ab_info) {
+				/* same */
+				fprintf(s->fp, "# branch.ab +0 -0%c", eol);
+			}
+		}
+	}
+}
+
+/*
+ * Convert various submodule status values into a
+ * fixed-length string of characters in the buffer provided.
+ */
+static void wt_porcelain_v2_submodule_state(
+	struct wt_status_change_data *d,
+	char sub[5])
+{
+	if (S_ISGITLINK(d->mode_head) ||
+		S_ISGITLINK(d->mode_index) ||
+		S_ISGITLINK(d->mode_worktree)) {
+		sub[0] = 'S';
+		sub[1] = d->new_submodule_commits ? 'C' : '.';
+		sub[2] = (d->dirty_submodule & DIRTY_SUBMODULE_MODIFIED) ? 'M' : '.';
+		sub[3] = (d->dirty_submodule & DIRTY_SUBMODULE_UNTRACKED) ? 'U' : '.';
+	} else {
+		sub[0] = 'N';
+		sub[1] = '.';
+		sub[2] = '.';
+		sub[3] = '.';
+	}
+	sub[4] = 0;
+}
+
+/*
+ * Fix-up changed entries before we print them.
+ */
+static void wt_porcelain_v2_fix_up_changed(struct string_list_item *it)
+{
+	struct wt_status_change_data *d = it->util;
+
+	if (!d->index_status) {
+		/*
+		 * This entry is unchanged in the index (relative to the head).
+		 * Therefore, the collect_updated_cb was never called for this
+		 * entry (during the head-vs-index scan) and so the head column
+		 * fields were never set.
+		 *
+		 * We must have data for the index column (from the
+		 * index-vs-worktree scan (otherwise, this entry should not be
+		 * in the list of changes)).
+		 *
+		 * Copy index column fields to the head column, so that our
+		 * output looks complete.
+		 */
+		assert(d->mode_head == 0);
+		d->mode_head = d->mode_index;
+		oidcpy(&d->oid_head, &d->oid_index);
+	}
+
+	if (!d->worktree_status) {
+		/*
+		 * This entry is unchanged in the worktree (relative to the index).
+		 * Therefore, the collect_changed_cb was never called for this entry
+		 * (during the index-vs-worktree scan) and so the worktree column
+		 * fields were never set.
+		 *
+		 * We must have data for the index column (from the head-vs-index
+		 * scan).
+		 *
+		 * Copy the index column fields to the worktree column so that
+		 * our output looks complete.
+		 *
+		 * Note that we only have a mode field in the worktree column
+		 * because the scan code tries really hard to not have to compute it.
+		 */
+		assert(d->mode_worktree == 0);
+		d->mode_worktree = d->mode_index;
+	}
+}
+
+/*
+ * Print porcelain v2 info for tracked entries with changes.
+ */
+static void wt_porcelain_v2_print_changed_entry(
+	struct string_list_item *it,
+	struct wt_status *s)
+{
+	struct wt_status_change_data *d = it->util;
+	struct strbuf buf = STRBUF_INIT;
+	struct strbuf buf_from = STRBUF_INIT;
+	const char *path = NULL;
+	const char *path_from = NULL;
+	char key[3];
+	char submodule_token[5];
+	char sep_char, eol_char;
+
+	wt_porcelain_v2_fix_up_changed(it);
+	wt_porcelain_v2_submodule_state(d, submodule_token);
+
+	key[0] = d->index_status ? d->index_status : '.';
+	key[1] = d->worktree_status ? d->worktree_status : '.';
+	key[2] = 0;
+
+	if (s->null_termination) {
+		/*
+		 * In -z mode, we DO NOT C-quote pathnames.  Current path is ALWAYS first.
+		 * A single NUL character separates them.
+		 */
+		sep_char = '\0';
+		eol_char = '\0';
+		path = it->string;
+		path_from = d->rename_source;
+	} else {
+		/*
+		 * Path(s) are C-quoted if necessary. Current path is ALWAYS first.
+		 * The source path is only present when necessary.
+		 * A single TAB separates them (because paths can contain spaces
+		 * which are not escaped and C-quoting does escape TAB characters).
+		 */
+		sep_char = '\t';
+		eol_char = '\n';
+		path = quote_path(it->string, s->prefix, &buf);
+		if (d->rename_source)
+			path_from = quote_path(d->rename_source, s->prefix, &buf_from);
+	}
+
+	if (path_from)
+		fprintf(s->fp, "2 %s %s %06o %06o %06o %s %s %c%d %s%c%s%c",
+				key, submodule_token,
+				d->mode_head, d->mode_index, d->mode_worktree,
+				oid_to_hex(&d->oid_head), oid_to_hex(&d->oid_index),
+				d->rename_status, d->rename_score,
+				path, sep_char, path_from, eol_char);
+	else
+		fprintf(s->fp, "1 %s %s %06o %06o %06o %s %s %s%c",
+				key, submodule_token,
+				d->mode_head, d->mode_index, d->mode_worktree,
+				oid_to_hex(&d->oid_head), oid_to_hex(&d->oid_index),
+				path, eol_char);
+
+	strbuf_release(&buf);
+	strbuf_release(&buf_from);
+}
+
+/*
+ * Print porcelain v2 status info for unmerged entries.
+ */
+static void wt_porcelain_v2_print_unmerged_entry(
+	struct string_list_item *it,
+	struct wt_status *s)
+{
+	struct wt_status_change_data *d = it->util;
+	struct index_state *istate = s->repo->index;
+	const struct cache_entry *ce;
+	struct strbuf buf_index = STRBUF_INIT;
+	const char *path_index = NULL;
+	int pos, stage, sum;
+	struct {
+		int mode;
+		struct object_id oid;
+	} stages[3];
+	char *key;
+	char submodule_token[5];
+	char unmerged_prefix = 'u';
+	char eol_char = s->null_termination ? '\0' : '\n';
+
+	wt_porcelain_v2_submodule_state(d, submodule_token);
+
+	switch (d->stagemask) {
+	case 1: key = "DD"; break; /* both deleted */
+	case 2: key = "AU"; break; /* added by us */
+	case 3: key = "UD"; break; /* deleted by them */
+	case 4: key = "UA"; break; /* added by them */
+	case 5: key = "DU"; break; /* deleted by us */
+	case 6: key = "AA"; break; /* both added */
+	case 7: key = "UU"; break; /* both modified */
+	default:
+		BUG("unhandled unmerged status %x", d->stagemask);
+	}
+
+	/*
+	 * Disregard d.aux.porcelain_v2 data that we accumulated
+	 * for the head and index columns during the scans and
+	 * replace with the actual stage data.
+	 *
+	 * Note that this is a last-one-wins for each the individual
+	 * stage [123] columns in the event of multiple cache entries
+	 * for same stage.
+	 */
+	memset(stages, 0, sizeof(stages));
+	sum = 0;
+	pos = index_name_pos(istate, it->string, strlen(it->string));
+	assert(pos < 0);
+	pos = -pos-1;
+	while (pos < istate->cache_nr) {
+		ce = istate->cache[pos++];
+		stage = ce_stage(ce);
+		if (strcmp(ce->name, it->string) || !stage)
+			break;
+		stages[stage - 1].mode = ce->ce_mode;
+		oidcpy(&stages[stage - 1].oid, &ce->oid);
+		sum |= (1 << (stage - 1));
+	}
+	if (sum != d->stagemask)
+		BUG("observed stagemask 0x%x != expected stagemask 0x%x", sum, d->stagemask);
+
+	if (s->null_termination)
+		path_index = it->string;
+	else
+		path_index = quote_path(it->string, s->prefix, &buf_index);
+
+	fprintf(s->fp, "%c %s %s %06o %06o %06o %06o %s %s %s %s%c",
+			unmerged_prefix, key, submodule_token,
+			stages[0].mode, /* stage 1 */
+			stages[1].mode, /* stage 2 */
+			stages[2].mode, /* stage 3 */
+			d->mode_worktree,
+			oid_to_hex(&stages[0].oid), /* stage 1 */
+			oid_to_hex(&stages[1].oid), /* stage 2 */
+			oid_to_hex(&stages[2].oid), /* stage 3 */
+			path_index,
+			eol_char);
+
+	strbuf_release(&buf_index);
+}
+
+/*
+ * Print porcelain V2 status info for untracked and ignored entries.
+ */
+static void wt_porcelain_v2_print_other(
+	struct string_list_item *it,
+	struct wt_status *s,
+	char prefix)
+{
+	struct strbuf buf = STRBUF_INIT;
+	const char *path;
+	char eol_char;
+
+	if (s->null_termination) {
+		path = it->string;
+		eol_char = '\0';
+	} else {
+		path = quote_path(it->string, s->prefix, &buf);
+		eol_char = '\n';
+	}
+
+	fprintf(s->fp, "%c %s%c", prefix, path, eol_char);
+
+	strbuf_release(&buf);
+}
+
+/*
+ * Print porcelain V2 status.
+ *
+ * [<v2_branch>]
+ * [<v2_changed_items>]*
+ * [<v2_unmerged_items>]*
+ * [<v2_untracked_items>]*
+ * [<v2_ignored_items>]*
+ *
+ */
+static void wt_porcelain_v2_print(struct wt_status *s)
+{
+	struct wt_status_change_data *d;
+	struct string_list_item *it;
+	int i;
+
+	if (s->show_branch)
+		wt_porcelain_v2_print_tracking(s);
+
+	for (i = 0; i < s->change.nr; i++) {
+		it = &(s->change.items[i]);
+		d = it->util;
+		if (!d->stagemask)
+			wt_porcelain_v2_print_changed_entry(it, s);
+	}
+
+	for (i = 0; i < s->change.nr; i++) {
+		it = &(s->change.items[i]);
+		d = it->util;
+		if (d->stagemask)
+			wt_porcelain_v2_print_unmerged_entry(it, s);
+	}
+
+	for (i = 0; i < s->untracked.nr; i++) {
+		it = &(s->untracked.items[i]);
+		wt_porcelain_v2_print_other(it, s, '?');
+	}
+
+	for (i = 0; i < s->ignored.nr; i++) {
+		it = &(s->ignored.items[i]);
+		wt_porcelain_v2_print_other(it, s, '!');
+	}
+}
+
+void wt_status_print(struct wt_status *s)
+{
+	trace2_data_intmax("status", s->repo, "count/changed", s->change.nr);
+	trace2_data_intmax("status", s->repo, "count/untracked",
+			   s->untracked.nr);
+	trace2_data_intmax("status", s->repo, "count/ignored", s->ignored.nr);
+
+	trace2_region_enter("status", "print", s->repo);
+
+	switch (s->status_format) {
+	case STATUS_FORMAT_SHORT:
+		wt_shortstatus_print(s);
+		break;
+	case STATUS_FORMAT_PORCELAIN:
+		wt_porcelain_print(s);
+		break;
+	case STATUS_FORMAT_PORCELAIN_V2:
+		wt_porcelain_v2_print(s);
+		break;
+	case STATUS_FORMAT_UNSPECIFIED:
+		BUG("finalize_deferred_config() should have been called");
+		break;
+	case STATUS_FORMAT_NONE:
+	case STATUS_FORMAT_LONG:
+		wt_longstatus_print(s);
+		break;
+	}
+
+	trace2_region_leave("status", "print", s->repo);
+}
+
+/**
+ * Returns 1 if there are unstaged changes, 0 otherwise.
+ */
+int has_unstaged_changes(struct repository *r, int ignore_submodules)
+{
+	struct rev_info rev_info;
+	int result;
+
+	repo_init_revisions(r, &rev_info, NULL);
+	if (ignore_submodules) {
+		rev_info.diffopt.flags.ignore_submodules = 1;
+		rev_info.diffopt.flags.override_submodule_config = 1;
+	}
+	rev_info.diffopt.flags.quick = 1;
+	diff_setup_done(&rev_info.diffopt);
+	result = run_diff_files(&rev_info, 0);
+	return diff_result_code(&rev_info.diffopt, result);
+}
+
+/**
+ * Returns 1 if there are uncommitted changes, 0 otherwise.
+ */
+int has_uncommitted_changes(struct repository *r,
+			    int ignore_submodules)
+{
+	struct rev_info rev_info;
+	int result;
+
+	if (is_index_unborn(r->index))
+		return 0;
+
+	repo_init_revisions(r, &rev_info, NULL);
+	if (ignore_submodules)
+		rev_info.diffopt.flags.ignore_submodules = 1;
+	rev_info.diffopt.flags.quick = 1;
+
+	add_head_to_pending(&rev_info);
+	if (!rev_info.pending.nr) {
+		/*
+		 * We have no head (or it's corrupt); use the empty tree,
+		 * which will complain if the index is non-empty.
+		 */
+		struct tree *tree = lookup_tree(r, the_hash_algo->empty_tree);
+		add_pending_object(&rev_info, &tree->object, "");
+	}
+
+	diff_setup_done(&rev_info.diffopt);
+	result = run_diff_index(&rev_info, 1);
+	return diff_result_code(&rev_info.diffopt, result);
+}
+
+/**
+ * If the work tree has unstaged or uncommitted changes, dies with the
+ * appropriate message.
+ */
+int require_clean_work_tree(struct repository *r,
+			    const char *action,
+			    const char *hint,
+			    int ignore_submodules,
+			    int gently)
+{
+	struct lock_file lock_file = LOCK_INIT;
+	int err = 0, fd;
+
+	fd = repo_hold_locked_index(r, &lock_file, 0);
+	refresh_index(r->index, REFRESH_QUIET, NULL, NULL, NULL);
+	if (0 <= fd)
+		repo_update_index_if_able(r, &lock_file);
+	rollback_lock_file(&lock_file);
+
+	if (has_unstaged_changes(r, ignore_submodules)) {
+		/* TRANSLATORS: the action is e.g. "pull with rebase" */
+		error(_("cannot %s: You have unstaged changes."), _(action));
+		err = 1;
+	}
+
+	if (has_uncommitted_changes(r, ignore_submodules)) {
+		if (err)
+			error(_("additionally, your index contains uncommitted changes."));
+		else
+			error(_("cannot %s: Your index contains uncommitted changes."),
+			      _(action));
+		err = 1;
+	}
+
+	if (err) {
+		if (hint)
+			error("%s", hint);
+		if (!gently)
+			exit(128);
+	}
+
+	return err;
+}