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git/t/t4005-diff-rename-2.sh
Junio C Hamano 4727f64003 [PATCH] Make -C less eager. 
Like diff-tree, this patch makes -C option for diff-* brothers
to use only pre-image of modified files as rename/copy detection
by default.  Give --find-copies-harder to use unmodified files
to find copies from as well.

This also fixes "diff-files -C" problem earlier noticed by
Linus.  It was feeding the null sha1 even when the file in the
work tree was known to match what is in the index file.  This
resulted in diff-files showing everything in the project.

Signed-off-by: Junio C Hamano <junkio@cox.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-19 20:13:18 -07:00

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#!/bin/sh
#
# Copyright (c) 2005 Junio C Hamano
#
test_description='Same rename detection as t4003 but testing diff-raw.
'
. ./test-lib.sh
. ../diff-lib.sh ;# test-lib chdir's into trash
test_expect_success \
'prepare reference tree' \
'cat ../../COPYING >COPYING &&
echo frotz >rezrov &&
git-update-cache --add COPYING rezrov &&
tree=$(git-write-tree) &&
echo $tree'
test_expect_success \
'prepare work tree' \
'sed -e 's/HOWEVER/However/' <COPYING >COPYING.1 &&
sed -e 's/GPL/G.P.L/g' <COPYING >COPYING.2 &&
rm -f COPYING &&
git-update-cache --add --remove COPYING COPYING.?'
# tree has COPYING and rezrov. work tree has COPYING.1 and COPYING.2,
# both are slightly edited, and unchanged rezrov. We say COPYING.1
# and COPYING.2 are based on COPYING, and do not say anything about
# rezrov.
git-diff-cache -M $tree >current
cat >expected <<\EOF
:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 0603b3238a076dc6c8022aedc6648fa523a17178 C1234 COPYING COPYING.1
:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 06c67961bbaed34a127f76d261f4c0bf73eda471 R1234 COPYING COPYING.2
EOF
test_expect_success \
'validate output from rename/copy detection (#1)' \
'compare_diff_raw current expected'
# make sure diff-helper can grok it.
mv expected diff-raw
GIT_DIFF_OPTS=--unified=0 git-diff-helper <diff-raw >current
cat >expected <<\EOF
diff --git a/COPYING b/COPYING.1
copy from COPYING
copy to COPYING.1
--- a/COPYING
+++ b/COPYING.1
@@ -6 +6 @@
- HOWEVER, in order to allow a migration to GPLv3 if that seems like
+ However, in order to allow a migration to GPLv3 if that seems like
diff --git a/COPYING b/COPYING.2
rename from COPYING
rename to COPYING.2
--- a/COPYING
+++ b/COPYING.2
@@ -2 +2 @@
- Note that the only valid version of the GPL as far as this project
+ Note that the only valid version of the G.P.L as far as this project
@@ -6 +6 @@
- HOWEVER, in order to allow a migration to GPLv3 if that seems like
+ HOWEVER, in order to allow a migration to G.P.Lv3 if that seems like
@@ -12 +12 @@
- This file is licensed under the GPL v2, or a later version
+ This file is licensed under the G.P.L v2, or a later version
EOF
test_expect_success \
'validate output from diff-helper (#1)' \
'compare_diff_patch current expected'
################################################################
test_expect_success \
'prepare work tree again' \
'mv COPYING.2 COPYING &&
git-update-cache --add --remove COPYING COPYING.1 COPYING.2'
# tree has COPYING and rezrov. work tree has COPYING and COPYING.1,
# both are slightly edited, and unchanged rezrov. We say COPYING.1
# is based on COPYING and COPYING is still there, and do not say anything
# about rezrov.
git-diff-cache -C $tree >current
cat >expected <<\EOF
:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 06c67961bbaed34a127f76d261f4c0bf73eda471 M COPYING
:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 0603b3238a076dc6c8022aedc6648fa523a17178 C1234 COPYING COPYING.1
EOF
test_expect_success \
'validate output from rename/copy detection (#2)' \
'compare_diff_raw current expected'
# make sure diff-helper can grok it.
mv expected diff-raw
GIT_DIFF_OPTS=--unified=0 git-diff-helper <diff-raw >current
cat >expected <<\EOF
diff --git a/COPYING b/COPYING
--- a/COPYING
+++ b/COPYING
@@ -2 +2 @@
- Note that the only valid version of the GPL as far as this project
+ Note that the only valid version of the G.P.L as far as this project
@@ -6 +6 @@
- HOWEVER, in order to allow a migration to GPLv3 if that seems like
+ HOWEVER, in order to allow a migration to G.P.Lv3 if that seems like
@@ -12 +12 @@
- This file is licensed under the GPL v2, or a later version
+ This file is licensed under the G.P.L v2, or a later version
diff --git a/COPYING b/COPYING.1
copy from COPYING
copy to COPYING.1
--- a/COPYING
+++ b/COPYING.1
@@ -6 +6 @@
- HOWEVER, in order to allow a migration to GPLv3 if that seems like
+ However, in order to allow a migration to GPLv3 if that seems like
EOF
test_expect_success \
'validate output from diff-helper (#2)' \
'compare_diff_patch current expected'
################################################################
# tree has COPYING and rezrov. work tree has the same COPYING and
# copy-edited COPYING.1, and unchanged rezrov. We should not say
# anything about rezrov nor COPYING, since the revised again diff-raw
# nows how to say Copy.
test_expect_success \
'prepare work tree once again' \
'cat ../../COPYING >COPYING &&
git-update-cache --add --remove COPYING COPYING.1'
git-diff-cache -C --find-copies-harder $tree >current
cat >expected <<\EOF
:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 0603b3238a076dc6c8022aedc6648fa523a17178 C1234 COPYING COPYING.1
EOF
test_expect_success \
'validate output from rename/copy detection (#3)' \
'compare_diff_raw current expected'
# make sure diff-helper can grok it.
mv expected diff-raw
GIT_DIFF_OPTS=--unified=0 git-diff-helper <diff-raw >current
cat >expected <<\EOF
diff --git a/COPYING b/COPYING.1
copy from COPYING
copy to COPYING.1
--- a/COPYING
+++ b/COPYING.1
@@ -6 +6 @@
- HOWEVER, in order to allow a migration to GPLv3 if that seems like
+ However, in order to allow a migration to GPLv3 if that seems like
EOF
test_expect_success \
'validate output from diff-helper (#3)' \
'compare_diff_patch current expected'
test_done
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