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, 38 insertions, 3 deletions

diff --git a/t/t3010-ls-files-killed.sh b/t/t3010-ls-files-killed-modified.sh
index 2e18baae5..5fc197671 100755
--- a/t/t3010-ls-files-killed.sh
+++ b/t/t3010-ls-files-killed-modified.sh
@@ -3,7 +3,7 @@
 # Copyright (c) 2005 Junio C Hamano
 #
 
-test_description='git-ls-files -k flag test.
+test_description='git-ls-files -k and -m flags test.
 
 This test prepares the following in the cache:
 
@@ -24,6 +24,16 @@ and the following on the filesystem:
 
 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
 
@@ -32,11 +42,15 @@ 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?"
+    "git-update-index --add -- path0 path1 path?/file? path7 path8 path9 path10"
 
-rm -fr path?
+rm -fr path? ;# leave path10 alone
 date >path2
 ln -s frotz path3
 ln -s nitfol path5
@@ -44,6 +58,10 @@ 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.' \
@@ -58,4 +76,21 @@ 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