add -s option to 'got remove' which deletes files in a particular status

This makes it easy to deal with files that were deleted from disk by external
tooling which modified the work tree. Such files are left in missing (!)
status and can now be marked for deletion in bulk via 'got rm -s\! -R .'

For consistency, modified (M) files can now be removed with 'got rm -s M'
which implies 'got rm -f'.

Prompted by feedback from krw@

ok?
 
diff bf13e347e15d6f720f2aa2cf9c2445b1833112df 9a708d80b1d9192f4be0126f5c8c6ebe6e22eb52
blob - 8f049181b8b59970cb560bc5e0623a8015811931
blob + 19122e372a158d8a95216bb854924e9a25225a76
--- got/got.1
+++ got/got.1
@@ -1105,7 +1105,7 @@ With -R, add files even if they match a
 .Cm got status
 ignore pattern.
 .El
-.It Cm remove Oo Fl f Oc Oo Fl k Oc Oo Fl R Oc Ar path ...
+.It Cm remove Oo Fl f Oc Oo Fl k Oc Oo Fl R Oc Oo Fl s Ar status-codes Oc Ar path ...
 Remove versioned files from a work tree and schedule them for deletion
 from the repository in the next commit.
 .Pp
@@ -1124,6 +1124,18 @@ If this option is not specified,
 will refuse to run if a specified
 .Ar path
 is a directory.
+.It Fl s Ar status-codes
+Only delete files with a modification status matching one of the
+single-character status codes contained in the
+.Ar status-codes
+argument.
+The following status codes may be specified:
+.Bl -column YXZ description
+.It M Ta modified file (this implies the
+.Fl f
+option)
+.It ! Ta versioned file expected on disk but missing
+.El
 .El
 .It Cm rm
 Short alias for
blob - 93fe92b8cf1c50517bdedc66c2b0be234cb08074
blob + c344b324b3663021f87618a272fccebb36b409cf
--- got/got.c
+++ got/got.c
@@ -6022,8 +6022,8 @@ done:
 __dead static void
 usage_remove(void)
 {
-	fprintf(stderr, "usage: %s remove [-f] [-k] [-R] path ...\n",
-	    getprogname());
+	fprintf(stderr, "usage: %s remove [-f] [-k] [-R] [-s status-codes] "
+	    "path ...\n", getprogname());
 	exit(1);
 }
 
@@ -6047,14 +6047,15 @@ cmd_remove(int argc, char *argv[])
 	const struct got_error *error = NULL;
 	struct got_worktree *worktree = NULL;
 	struct got_repository *repo = NULL;
+	const char *status_codes = NULL;
 	char *cwd = NULL;
 	struct got_pathlist_head paths;
 	struct got_pathlist_entry *pe;
-	int ch, delete_local_mods = 0, can_recurse = 0, keep_on_disk = 0;
+	int ch, delete_local_mods = 0, can_recurse = 0, keep_on_disk = 0, i;
 
 	TAILQ_INIT(&paths);
 
-	while ((ch = getopt(argc, argv, "fkR")) != -1) {
+	while ((ch = getopt(argc, argv, "fkRs:")) != -1) {
 		switch (ch) {
 		case 'f':
 			delete_local_mods = 1;
@@ -6065,6 +6066,21 @@ cmd_remove(int argc, char *argv[])
 		case 'R':
 			can_recurse = 1;
 			break;
+		case 's':
+			for (i = 0; i < strlen(optarg); i++) {
+				switch (optarg[i]) {
+				case GOT_STATUS_MODIFY:
+					delete_local_mods = 1;
+					break;
+				case GOT_STATUS_MISSING:
+					break;
+				default:
+					errx(1, "invalid status code '%c'",
+					    optarg[i]);
+				}
+			}
+			status_codes = optarg;
+			break;
 		default:
 			usage_remove();
 			/* NOTREACHED */
@@ -6138,7 +6154,8 @@ cmd_remove(int argc, char *argv[])
 	}
 
 	error = got_worktree_schedule_delete(worktree, &paths,
-	    delete_local_mods, print_remove_status, NULL, repo, keep_on_disk);
+	    delete_local_mods, status_codes, print_remove_status, NULL,
+	    repo, keep_on_disk);
 done:
 	if (repo)
 		got_repo_close(repo);
blob - f0548eaf6e23287e3754b08de478a43d1c8206c2
blob + c655d810c3ca855bdbd7d38b7191e1243efb8b91
--- include/got_worktree.h
+++ include/got_worktree.h
@@ -187,8 +187,8 @@ const struct got_error *got_worktree_schedule_add(stru
  */
 const struct got_error *
 got_worktree_schedule_delete(struct got_worktree *,
-    struct got_pathlist_head *, int, got_worktree_delete_cb, void *,
-    struct got_repository *, int);
+    struct got_pathlist_head *, int, const char *,
+    got_worktree_delete_cb, void *, struct got_repository *, int);
 
 /* A callback function which is used to select or reject a patch. */
 typedef const struct got_error *(*got_worktree_patch_cb)(int *, void *,
blob - 68b5face374018032f08f3badf8b7728e33e799d
blob + 8afc4c2596b52c558eca6fd9e0ac8678040d308f
--- lib/worktree.c
+++ lib/worktree.c
@@ -3742,6 +3742,7 @@ struct schedule_deletion_args {
 	struct got_repository *repo;
 	int delete_local_mods;
 	int keep_on_disk;
+	const char *status_codes;
 };
 
 static const struct got_error *
@@ -3776,6 +3777,28 @@ schedule_for_deletion(void *arg, unsigned char status,
 	if (err)
 		goto done;
 
+	if (a->status_codes) {
+		size_t ncodes = strlen(a->status_codes);
+		int i;
+		for (i = 0; i < ncodes ; i++) {
+			if (status == a->status_codes[i])
+				break;
+		}
+		if (i == ncodes) { 
+			/* Do not delete files in non-matching status. */
+			free(ondisk_path);
+			return NULL;
+		}
+		if (a->status_codes[i] != GOT_STATUS_MODIFY &&
+		    a->status_codes[i] != GOT_STATUS_MISSING) {
+			static char msg[64];
+			snprintf(msg, sizeof(msg),
+			    "invalid status code '%c'", a->status_codes[i]);
+			err = got_error_msg(GOT_ERR_FILE_STATUS, msg);
+			goto done;
+		}
+	}
+
 	if (status != GOT_STATUS_NO_CHANGE) {
 		if (status == GOT_STATUS_DELETE)
 			goto done;
@@ -3837,6 +3860,7 @@ done:
 const struct got_error *
 got_worktree_schedule_delete(struct got_worktree *worktree,
     struct got_pathlist_head *paths, int delete_local_mods,
+    const char *status_codes,
     got_worktree_delete_cb progress_cb, void *progress_arg,
     struct got_repository *repo, int keep_on_disk)
 {
@@ -3861,6 +3885,7 @@ got_worktree_schedule_delete(struct got_worktree *work
 	sda.repo = repo;
 	sda.delete_local_mods = delete_local_mods;
 	sda.keep_on_disk = keep_on_disk;
+	sda.status_codes = status_codes;
 
 	TAILQ_FOREACH(pe, paths, entry) {
 		err = worktree_status(worktree, pe->path, fileindex, repo,
blob - 73d86eda6228d31f0ebefc6ba49d0625ab6833b0
blob + e159de382cd06a0f707167bfb65330fac8ddc2be
--- regress/cmdline/rm.sh
+++ regress/cmdline/rm.sh
@@ -438,6 +438,83 @@ function test_rm_symlink {
 	test_done "$testroot" "$ret"
 }
 
+function test_rm_status_code {
+	local testroot=`test_init rm_status_code`
+
+	got checkout $testroot/repo $testroot/wt > /dev/null
+	ret="$?"
+	if [ "$ret" != "0" ]; then
+		test_done "$testroot" "$ret"
+		return 1
+	fi
+
+	echo "modified beta" > $testroot/wt/beta
+
+	echo "got: invalid status code 'x'" > $testroot/stderr.expected
+	(cd $testroot/wt && got rm -s Mx beta 2>$testroot/stderr)
+
+	cmp -s $testroot/stderr.expected $testroot/stderr
+	ret="$?"
+	if [ "$ret" != "0" ]; then
+		diff -u $testroot/stderr.expected $testroot/stderr
+		test_done "$testroot" "$ret"
+		return 1
+	fi
+
+	rm $testroot/wt/epsilon/zeta # put file into 'missing' status
+
+	echo 'D  epsilon/zeta' > $testroot/stdout.expected
+	(cd $testroot/wt && got rm -R -s '!' . >$testroot/stdout)
+
+	cmp -s $testroot/stdout.expected $testroot/stdout
+	ret="$?"
+	if [ "$ret" != "0" ]; then
+		diff -u $testroot/stdout.expected $testroot/stdout
+	fi
+
+	if [ ! -e $testroot/wt/beta ]; then
+		echo "file beta was unexpectedly removed from disk" >&2
+		test_done "$testroot" "1"
+		return 1
+	fi
+
+	# put file into 'missing' status again
+	(cd $testroot/wt && got revert epsilon/zeta > /dev/null)
+	rm $testroot/wt/epsilon/zeta
+
+	echo 'D  beta' > $testroot/stdout.expected
+	echo 'D  epsilon/zeta' >> $testroot/stdout.expected
+	(cd $testroot/wt && got rm -R -s 'M!' . >$testroot/stdout)
+
+	cmp -s $testroot/stdout.expected $testroot/stdout
+	ret="$?"
+	if [ "$ret" != "0" ]; then
+		diff -u $testroot/stdout.expected $testroot/stdout
+		test_done "$testroot" "1"
+		return 1
+	fi
+
+	if [ -e $testroot/wt/beta ]; then
+		echo "removed file beta still exists on disk" >&2
+		test_done "$testroot" "1"
+		return 1
+	fi
+
+	echo 'D  beta' > $testroot/stdout.expected
+	echo 'D  epsilon/zeta' >> $testroot/stdout.expected
+	(cd $testroot/wt && got status > $testroot/stdout)
+	cmp -s $testroot/stdout.expected $testroot/stdout
+	ret="$?"
+	if [ "$ret" != "0" ]; then
+		diff -u $testroot/stdout.expected $testroot/stdout
+		test_done "$testroot" "1"
+		return 1
+	fi
+
+	test_done "$testroot" "$ret"
+}
+
+
 test_parseargs "$@"
 run_test test_rm_basic
 run_test test_rm_with_local_mods
@@ -447,3 +524,4 @@ run_test test_rm_directory
 run_test test_rm_directory_keep_files
 run_test test_rm_subtree
 run_test test_rm_symlink
+run_test test_rm_status_code