Show modified files in git-ls-files

Add -m/--modified to show files that have been modified wrt. the index.

[jc: The original came from Brian Gerst on Sep 1st but it only checked
if the paths were cache dirty without actually checking the files were
modified.  I also added the usage string and a new test.]

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

1 files changed, 96 insertions, 0 deletions

diff --git a/t/t3010-ls-files-killed-modified.sh b/t/t3010-ls-files-killed-modified.sh
new file mode 100755
index 0000000000..5fc1976711
--- /dev/null
+++ b/t/t3010-ls-files-killed-modified.sh
@@ -0,0 +1,96 @@
+#!/bin/sh
+#
+# Copyright (c) 2005 Junio C Hamano
+#
+
+test_description='git-ls-files -k and -m flags test.
+
+This test prepares the following in the cache:
+
+    path0       - a file
+    path1       - a symlink
+    path2/file2 - a file in a directory
+    path3/file3 - a file in a directory
+
+and the following on the filesystem:
+
+    path0/file0 - a file in a directory
+    path1/file1 - a file in a directory
+    path2       - a file
+    path3       - a symlink
+    path4	- a file
+    path5	- a symlink
+    path6/file6 - a file in a directory
+
+git-ls-files -k should report that existing filesystem
+objects except path4, path5 and path6/file6 to be killed.
+
+Also for modification test, the cache and working tree have:
+
+    path7       - an empty file, modified to a non-empty file.
+    path8       - a non-empty file, modified to an empty file.
+    path9	- an empty file, cache dirtied.
+    path10	- a non-empty file, cache dirtied.
+
+We should report path0, path1, path2/file2, path3/file3, path7 and path8
+modified without reporting path9 and path10.
+'
+. ./test-lib.sh
+
+date >path0
+ln -s xyzzy path1
+mkdir path2 path3
+date >path2/file2
+date >path3/file3
+: >path7
+date >path8
+: >path9
+date >path10
+test_expect_success \
+    'git-update-index --add to add various paths.' \
+    "git-update-index --add -- path0 path1 path?/file? path7 path8 path9 path10"
+
+rm -fr path? ;# leave path10 alone
+date >path2
+ln -s frotz path3
+ln -s nitfol path5
+mkdir path0 path1 path6
+date >path0/file0
+date >path1/file1
+date >path6/file6
+date >path7
+: >path8
+: >path9
+touch path10
+
+test_expect_success \
+    'git-ls-files -k to show killed files.' \
+    'git-ls-files -k >.output'
+cat >.expected <<EOF
+path0/file0
+path1/file1
+path2
+path3
+EOF
+
+test_expect_success \
+    'validate git-ls-files -k output.' \
+    'diff .output .expected'
+
+test_expect_success \
+    'git-ls-files -m to show modified files.' \
+    'git-ls-files -m >.output'
+cat >.expected <<EOF
+path0
+path1
+path2/file2
+path3/file3
+path7
+path8
+EOF
+
+test_expect_success \
+    'validate git-ls-files -m output.' \
+    'diff .output .expected'
+
+test_done