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path: root/t/t4020-diff-external.sh
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#!/bin/sh
 
test_description='external diff interface test'
 
. ./test-lib.sh
 
test_expect_success setup '
 
	test_tick &&
	echo initial >file &&
	git add file &&
	git commit -m initial &&
 
	test_tick &&
	echo second >file &&
	git add file &&
	git commit -m second &&
 
	test_tick &&
	echo third >file
'
 
test_expect_success 'GIT_EXTERNAL_DIFF environment' '
 
	GIT_EXTERNAL_DIFF=echo git diff | {
		read path oldfile oldhex oldmode newfile newhex newmode &&
		test "z$path" = zfile &&
		test "z$oldmode" = z100644 &&
		test "z$newhex" = "z$_z40" &&
		test "z$newmode" = z100644 &&
		oh=$(git rev-parse --verify HEAD:file) &&
		test "z$oh" = "z$oldhex"
	}
 
'
 
test_expect_success 'GIT_EXTERNAL_DIFF environment should apply only to diff' '
 
	GIT_EXTERNAL_DIFF=echo git log -p -1 HEAD |
	grep "^diff --git a/file b/file"
 
'
 
test_expect_success 'GIT_EXTERNAL_DIFF environment and --no-ext-diff' '
 
	GIT_EXTERNAL_DIFF=echo git diff --no-ext-diff |
	grep "^diff --git a/file b/file"
 
'
 
test_expect_success 'diff attribute' '
 
	git config diff.parrot.command echo &&
 
	echo >.gitattributes "file diff=parrot" &&
 
	git diff | {
		read path oldfile oldhex oldmode newfile newhex newmode &&
		test "z$path" = zfile &&
		test "z$oldmode" = z100644 &&
		test "z$newhex" = "z$_z40" &&
		test "z$newmode" = z100644 &&
		oh=$(git rev-parse --verify HEAD:file) &&
		test "z$oh" = "z$oldhex"
	}
 
'
 
test_expect_success 'diff attribute should apply only to diff' '
 
	git log -p -1 HEAD |
	grep "^diff --git a/file b/file"
 
'
 
test_expect_success 'diff attribute and --no-ext-diff' '
 
	git diff --no-ext-diff |
	grep "^diff --git a/file b/file"
 
'
 
test_expect_success 'diff attribute' '
 
	git config --unset diff.parrot.command &&
	git config diff.color.command echo &&
 
	echo >.gitattributes "file diff=color" &&
 
	git diff | {
		read path oldfile oldhex oldmode newfile newhex newmode &&
		test "z$path" = zfile &&
		test "z$oldmode" = z100644 &&
		test "z$newhex" = "z$_z40" &&
		test "z$newmode" = z100644 &&
		oh=$(git rev-parse --verify HEAD:file) &&
		test "z$oh" = "z$oldhex"
	}
 
'
 
test_expect_success 'diff attribute should apply only to diff' '
 
	git log -p -1 HEAD |
	grep "^diff --git a/file b/file"
 
'
 
test_expect_success 'diff attribute and --no-ext-diff' '
 
	git diff --no-ext-diff |
	grep "^diff --git a/file b/file"
 
'
 
test_expect_success 'no diff with -diff' '
	echo >.gitattributes "file -diff" &&
	git diff | grep Binary
'
 
echo NULZbetweenZwords | $PERL_PATH -pe 'y/Z/\000/' > file
 
test_expect_success 'force diff with "diff"' '
	echo >.gitattributes "file diff" &&
	git diff >actual &&
	test_cmp "$TEST_DIRECTORY"/t4020/diff.NUL actual
'
 
test_expect_success 'GIT_EXTERNAL_DIFF with more than one changed files' '
	echo anotherfile > file2 &&
	git add file2 &&
	git commit -m "added 2nd file" &&
	echo modified >file2 &&
	GIT_EXTERNAL_DIFF=echo git diff
'
 
test_expect_success 'GIT_EXTERNAL_DIFF generates pretty paths' '
	touch file.ext &&
	git add file.ext &&
	echo with extension > file.ext &&
	GIT_EXTERNAL_DIFF=echo git diff file.ext | grep ......_file\.ext &&
	git update-index --force-remove file.ext &&
	rm file.ext
'
 
echo "#!$SHELL_PATH" >fake-diff.sh
cat >> fake-diff.sh <<\EOF
cat $2 >> crlfed.txt
EOF
chmod a+x fake-diff.sh
 
keep_only_cr () {
	tr -dc '\015'
}
 
test_expect_success 'external diff with autocrlf = true' '
	git config core.autocrlf true &&
	GIT_EXTERNAL_DIFF=./fake-diff.sh git diff &&
	test $(wc -l < crlfed.txt) = $(cat crlfed.txt | keep_only_cr | wc -c)
'
 
test_expect_success 'diff --cached' '
	git add file &&
	git update-index --assume-unchanged file &&
	echo second >file &&
	git diff --cached >actual &&
	test_cmp "$TEST_DIRECTORY"/t4020/diff.NUL actual
'
 
test_done