Add new git-rm command with documentation

This adds a git-rm command which provides convenience similar to
git-add, (and a bit more since it takes care of the rm as well if
given -f).

Like git-add, git-rm expands the given path names through
git-ls-files. This means it only acts on files listed in the
index. And it does act recursively on directories by default, (no -r
needed as in the case of rm itself). When it recurses, it does not
remove empty directories that are left behind.

Signed-off-by: Junio C Hamano <junkio@cox.net>

.gitignore

@@ -84,6 +84,7 @@ git-resolve
 git-rev-list
 git-rev-parse
 git-revert
+git-rm
 git-send-email
 git-send-pack
 git-sh-setup

Documentation/git-rm.txt

@@ -0,0 +1,89 @@
+git-rm(1)
+=========
+
+NAME
+----
+git-rm - Remove files from the working tree and from the index.
+
+SYNOPSIS
+--------
+'git-rm' [-f] [-n] [-v] [--] <file>...
+
+DESCRIPTION
+-----------
+A convenience wrapper for git-update-index --remove. For those coming
+from cvs, git-rm provides an operation similar to "cvs rm" or "cvs
+remove".
+
+
+OPTIONS
+-------
+<file>...::
+	Files to remove from the index and optionally, from the
+	working tree as well.
+
+-f::
+	Remove files from the working tree as well as from the index.
+
+-n::
+        Don't actually remove the file(s), just show if they exist in
+        the index.
+
+-v::
+        Be verbose.
+
+--::
+	This option can be used to separate command-line options from
+	the list of files, (useful when filenames might be mistaken
+	for command-line options).
+
+
+DISCUSSION
+----------
+
+The list of <file> given to the command is fed to `git-ls-files`
+command to list files that are registered in the index and
+are not ignored/excluded by `$GIT_DIR/info/exclude` file or
+`.gitignore` file in each directory.  This means two things:
+
+. You can put the name of a directory on the command line, and the
+  command will remove all files in it and its subdirectories (the
+  directories themselves are never removed from the working tree);
+
+. Giving the name of a file that is not in the index does not
+  remove that file.
+
+
+EXAMPLES
+--------
+git-rm Documentation/\\*.txt::
+
+	Removes all `\*.txt` files from the index that are under the
+	`Documentation` directory and any of its subdirectories. The
+	files are not removed from the working tree.
++
+Note that the asterisk `\*` is quoted from the shell in this
+example; this lets the command include the files from
+subdirectories of `Documentation/` directory.
+
+git-rm -f git-*.sh::
+
+	Remove all git-*.sh scripts that are in the index. The files
+	are removed from the index, and (because of the -f option),
+	from the working tree as well. Because this example lets the
+	shell expand the asterisk (i.e. you are listing the files
+	explicitly), it does not remove `subdir/git-foo.sh`.
+
+
+Author
+------
+Written by Linus Torvalds <torvalds@osdl.org>
+
+Documentation
+--------------
+Documentation by Junio C Hamano and the git-list <git@vger.kernel.org>.
+
+GIT
+---
+Part of the gitlink:git[7] suite
+

Makefile

@@ -120,7 +120,7 @@ SCRIPT_SH = \
 	git-merge-one-file.sh git-parse-remote.sh \
 	git-prune.sh git-pull.sh git-push.sh git-rebase.sh \
 	git-repack.sh git-request-pull.sh git-reset.sh \
-	git-resolve.sh git-revert.sh git-sh-setup.sh \
+	git-resolve.sh git-revert.sh git-rm.sh git-sh-setup.sh \
 	git-tag.sh git-verify-tag.sh git-whatchanged.sh \
 	git-applymbox.sh git-applypatch.sh git-am.sh \
 	git-merge.sh git-merge-stupid.sh git-merge-octopus.sh \

git-rm.sh

@@ -0,0 +1,67 @@
+#!/bin/sh
+
+USAGE='[-f] [-n] [-v] [--] <file>...'
+SUBDIRECTORY_OK='Yes'
+. git-sh-setup
+
+index_remove_option=--force-remove
+remove_files=
+show_only=
+verbose=
+while : ; do
+  case "$1" in
+    -f)
+	remove_files=true
+	index_remote_option=--force
+	;;
+    -n)
+	show_only=true
+	;;
+    -v)
+	verbose=--verbose
+	;;
+    --)
+	shift; break
+	;;
+    -*)
+	usage
+	;;
+    *)
+	break
+	;;
+  esac
+  shift
+done
+
+# This is typo-proofing. If some paths match and some do not, we want
+# to do nothing.
+case "$#" in
+0)	;;
+*)
+	git-ls-files --error-unmatch -- "$@" >/dev/null || {
+		echo >&2 "Maybe you misspelled it?"
+		exit 1
+	}
+	;;
+esac
+
+files=$(
+    if test -f "$GIT_DIR/info/exclude" ; then
+	git-ls-files \
+	    --exclude-from="$GIT_DIR/info/exclude" \
+	    --exclude-per-directory=.gitignore -- "$@"
+    else
+	git-ls-files \
+	--exclude-per-directory=.gitignore -- "$@"
+    fi | sort | uniq
+)
+
+case "$show_only" in
+true)
+	echo $files
+	;;
+*)
+	[[ "$remove_files" = "true" ]] && rm -- $files
+	git-update-index $index_remove_option $verbose $files
+	;;
+esac

t/t3600-rm.sh

@@ -0,0 +1,42 @@
+#!/bin/sh
+#
+# Copyright (c) 2006 Carl D. Worth
+#
+
+test_description='Test of the various options to git-rm.'
+
+. ./test-lib.sh
+
+# Setup some files to be removed
+touch foo bar
+git-add foo bar
+# Need one to test --
+touch -- -q
+git update-index --add -- -q
+git-commit -m "add foo, bar, and -q"
+
+test_expect_success \
+    'Pre-check that foo is in index before git-rm foo' \
+    'git-ls-files --error-unmatch foo'
+
+test_expect_success \
+    'Test that git-rm foo succeeds' \
+    'git-rm foo'
+
+test_expect_failure \
+    'Post-check that foo is not in index after git-rm foo' \
+    'git-ls-files --error-unmatch foo'
+
+test_expect_success \
+    'Test that "git-rm -f bar" works' \
+    'git-rm -f bar'
+
+test_expect_failure \
+    'Post-check that bar no longer exists' \
+    '[ -f bar ]'
+
+test_expect_success \
+    'Test that "git-rm -- -q" works to delete a file named -q' \
+    'git-rm -- -q'
+
+test_done