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git/t/t4008-diff-break-rewrite.sh

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[PATCH] Add -B flag to diff-* brothers. A new diffcore transformation, diffcore-break.c, is introduced. When the -B flag is given, a patch that represents a complete rewrite is broken into a deletion followed by a creation. This makes it easier to review such a complete rewrite patch. The -B flag takes the same syntax as the -M and -C flags to specify the minimum amount of non-source material the resulting file needs to have to be considered a complete rewrite, and defaults to 99% if not specified. As the new test t4008-diff-break-rewrite.sh demonstrates, if a file is a complete rewrite, it is broken into a delete/create pair, which can further be subjected to the usual rename detection if -M or -C is used. For example, if file0 gets completely rewritten to make it as if it were rather based on file1 which itself disappeared, the following happens: The original change looks like this: file0 --> file0' (quite different from file0) file1 --> /dev/null After diffcore-break runs, it would become this: file0 --> /dev/null /dev/null --> file0' file1 --> /dev/null Then diffcore-rename matches them up: file1 --> file0' The internal score values are finer grained now. Earlier maximum of 10000 has been raised to 60000; there is no user visible changes but there is no reason to waste available bits. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-30 11:08:37 +04:00
#!/bin/sh
#
# Copyright (c) 2005 Junio C Hamano
#
test_description='Break and then rename
We have two very different files, file0 and file1, registered in a tree.
We update file1 so drastically that it is more similar to file0, and
then remove file0. With -B, changes to file1 should be broken into
separate delete and create, resulting in removal of file0, removal of
t4008: correct stale comments A complete rewrite of a single file was originally designed to be expressed as a deletion immediately followed by a creation of the same file, and the comments in the test updated here were written to reflect that design decision made in f345b0a0 (Add -B flag to diff-* brothers., 2005-05-30). However, we later realized that a complete rewrite is merely how a textual diff should be represented at 366175ef (Rework -B output., 2005-06-19), and updated the actual tests. But we forgot to update the introductory text while doing so. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-02-15 23:42:59 +03:00
original file1 and creation of completely rewritten file1. The latter
two are then merged back into a single "complete rewrite".
[PATCH] Add -B flag to diff-* brothers. A new diffcore transformation, diffcore-break.c, is introduced. When the -B flag is given, a patch that represents a complete rewrite is broken into a deletion followed by a creation. This makes it easier to review such a complete rewrite patch. The -B flag takes the same syntax as the -M and -C flags to specify the minimum amount of non-source material the resulting file needs to have to be considered a complete rewrite, and defaults to 99% if not specified. As the new test t4008-diff-break-rewrite.sh demonstrates, if a file is a complete rewrite, it is broken into a delete/create pair, which can further be subjected to the usual rename detection if -M or -C is used. For example, if file0 gets completely rewritten to make it as if it were rather based on file1 which itself disappeared, the following happens: The original change looks like this: file0 --> file0' (quite different from file0) file1 --> /dev/null After diffcore-break runs, it would become this: file0 --> /dev/null /dev/null --> file0' file1 --> /dev/null Then diffcore-rename matches them up: file1 --> file0' The internal score values are finer grained now. Earlier maximum of 10000 has been raised to 60000; there is no user visible changes but there is no reason to waste available bits. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-30 11:08:37 +04:00
Further, with -B and -M together, these three modifications should
turn into rename-edit of file0 into file1.
Starting from the same two files in the tree, we swap file0 and file1.
t4008: correct stale comments A complete rewrite of a single file was originally designed to be expressed as a deletion immediately followed by a creation of the same file, and the comments in the test updated here were written to reflect that design decision made in f345b0a0 (Add -B flag to diff-* brothers., 2005-05-30). However, we later realized that a complete rewrite is merely how a textual diff should be represented at 366175ef (Rework -B output., 2005-06-19), and updated the actual tests. But we forgot to update the introductory text while doing so. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-02-15 23:42:59 +03:00
With -B, this should be detected as two complete rewrites.
[PATCH] Add -B flag to diff-* brothers. A new diffcore transformation, diffcore-break.c, is introduced. When the -B flag is given, a patch that represents a complete rewrite is broken into a deletion followed by a creation. This makes it easier to review such a complete rewrite patch. The -B flag takes the same syntax as the -M and -C flags to specify the minimum amount of non-source material the resulting file needs to have to be considered a complete rewrite, and defaults to 99% if not specified. As the new test t4008-diff-break-rewrite.sh demonstrates, if a file is a complete rewrite, it is broken into a delete/create pair, which can further be subjected to the usual rename detection if -M or -C is used. For example, if file0 gets completely rewritten to make it as if it were rather based on file1 which itself disappeared, the following happens: The original change looks like this: file0 --> file0' (quite different from file0) file1 --> /dev/null After diffcore-break runs, it would become this: file0 --> /dev/null /dev/null --> file0' file1 --> /dev/null Then diffcore-rename matches them up: file1 --> file0' The internal score values are finer grained now. Earlier maximum of 10000 has been raised to 60000; there is no user visible changes but there is no reason to waste available bits. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-30 11:08:37 +04:00
Further, with -B and -M together, these should turn into two renames.
'
. ./test-lib.sh
tests: use $TEST_DIRECTORY to refer to the t/ directory Many test scripts assumed that they will start in a 'trash' subdirectory that is a single level down from the t/ directory, and referred to their test vector files by asking for files like "../t9999/expect". This will break if we move the 'trash' subdirectory elsewhere. To solve this, we earlier introduced "$TEST_DIRECTORY" so that they can refer to t/ directory reliably. This finally makes all the tests use it to refer to the outside environment. With this patch, and a one-liner not included here (because it would contradict with what Dscho really wants to do): | diff --git a/t/test-lib.sh b/t/test-lib.sh | index 70ea7e0..60e69e4 100644 | --- a/t/test-lib.sh | +++ b/t/test-lib.sh | @@ -485,7 +485,7 @@ fi | . ../GIT-BUILD-OPTIONS | | # Test repository | -test="trash directory" | +test="trash directory/another level/yet another" | rm -fr "$test" || { | trap - exit | echo >&5 "FATAL: Cannot prepare test area" all the tests still pass, but we would want extra sets of eyeballs on this type of change to really make sure. [jc: with help from Stephan Beyer on http-push tests I do not run myself; credits for locating silly quoting errors go to Olivier Marin.] Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-08 13:26:28 +04:00
. "$TEST_DIRECTORY"/diff-lib.sh ;# test-lib chdir's into trash
[PATCH] Add -B flag to diff-* brothers. A new diffcore transformation, diffcore-break.c, is introduced. When the -B flag is given, a patch that represents a complete rewrite is broken into a deletion followed by a creation. This makes it easier to review such a complete rewrite patch. The -B flag takes the same syntax as the -M and -C flags to specify the minimum amount of non-source material the resulting file needs to have to be considered a complete rewrite, and defaults to 99% if not specified. As the new test t4008-diff-break-rewrite.sh demonstrates, if a file is a complete rewrite, it is broken into a delete/create pair, which can further be subjected to the usual rename detection if -M or -C is used. For example, if file0 gets completely rewritten to make it as if it were rather based on file1 which itself disappeared, the following happens: The original change looks like this: file0 --> file0' (quite different from file0) file1 --> /dev/null After diffcore-break runs, it would become this: file0 --> /dev/null /dev/null --> file0' file1 --> /dev/null Then diffcore-rename matches them up: file1 --> file0' The internal score values are finer grained now. Earlier maximum of 10000 has been raised to 60000; there is no user visible changes but there is no reason to waste available bits. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-30 11:08:37 +04:00
t4008: modernise style Update this ancient test script to a more modern style in which the expected result is prepared inside the body of the test that uses it. Also, instead of using $tree, a shell variable, throughout the test script, create a tag that points at it, to make it easier to manually debug the test script in its trash directory. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-02-16 01:21:04 +03:00
test_expect_success setup '
cat "$TEST_DIRECTORY"/diff-lib/README >file0 &&
cat "$TEST_DIRECTORY"/diff-lib/COPYING >file1 &&
t4008: abstract away SHA-1-specific constants Adjust the test so that it computes variables for blobs instead of using hard-coded hashes. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-21 05:01:35 +03:00
blob0_id=$(git hash-object file0) &&
blob1_id=$(git hash-object file1) &&
t4008: modernise style Update this ancient test script to a more modern style in which the expected result is prepared inside the body of the test that uses it. Also, instead of using $tree, a shell variable, throughout the test script, create a tag that points at it, to make it easier to manually debug the test script in its trash directory. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-02-16 01:21:04 +03:00
git update-index --add file0 file1 &&
git tag reference $(git write-tree)
'
test_expect_success 'change file1 with copy-edit of file0 and remove file0' '
sed -e "s/git/GIT/" file0 >file1 &&
t4008: abstract away SHA-1-specific constants Adjust the test so that it computes variables for blobs instead of using hard-coded hashes. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-21 05:01:35 +03:00
blob2_id=$(git hash-object file1) &&
t4008: modernise style Update this ancient test script to a more modern style in which the expected result is prepared inside the body of the test that uses it. Also, instead of using $tree, a shell variable, throughout the test script, create a tag that points at it, to make it easier to manually debug the test script in its trash directory. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-02-16 01:21:04 +03:00
rm -f file0 &&
git update-index --remove file0 file1
'
test_expect_success 'run diff with -B (#1)' '
git diff-index -B --cached reference >current &&
t4008: abstract away SHA-1-specific constants Adjust the test so that it computes variables for blobs instead of using hard-coded hashes. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-21 05:01:35 +03:00
cat >expect <<-EOF &&
:100644 000000 $blob0_id $ZERO_OID D file0
:100644 100644 $blob1_id $blob2_id M100 file1
t4008: modernise style Update this ancient test script to a more modern style in which the expected result is prepared inside the body of the test that uses it. Also, instead of using $tree, a shell variable, throughout the test script, create a tag that points at it, to make it easier to manually debug the test script in its trash directory. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-02-16 01:21:04 +03:00
EOF
compare_diff_raw expect current
'
test_expect_success 'run diff with -B and -M (#2)' '
git diff-index -B -M reference >current &&
t4008: abstract away SHA-1-specific constants Adjust the test so that it computes variables for blobs instead of using hard-coded hashes. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-21 05:01:35 +03:00
cat >expect <<-EOF &&
:100644 100644 $blob0_id $blob2_id R100 file0 file1
t4008: modernise style Update this ancient test script to a more modern style in which the expected result is prepared inside the body of the test that uses it. Also, instead of using $tree, a shell variable, throughout the test script, create a tag that points at it, to make it easier to manually debug the test script in its trash directory. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-02-16 01:21:04 +03:00
EOF
compare_diff_raw expect current
'
test_expect_success 'swap file0 and file1' '
rm -f file0 file1 &&
git read-tree -m reference &&
git checkout-index -f -u -a &&
mv file0 tmp &&
mv file1 file0 &&
mv tmp file1 &&
git update-index file0 file1
'
test_expect_success 'run diff with -B (#3)' '
git diff-index -B reference >current &&
t4008: abstract away SHA-1-specific constants Adjust the test so that it computes variables for blobs instead of using hard-coded hashes. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-21 05:01:35 +03:00
cat >expect <<-EOF &&
:100644 100644 $blob0_id $blob1_id M100 file0
:100644 100644 $blob1_id $blob0_id M100 file1
t4008: modernise style Update this ancient test script to a more modern style in which the expected result is prepared inside the body of the test that uses it. Also, instead of using $tree, a shell variable, throughout the test script, create a tag that points at it, to make it easier to manually debug the test script in its trash directory. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-02-16 01:21:04 +03:00
EOF
compare_diff_raw expect current
'
test_expect_success 'run diff with -B and -M (#4)' '
git diff-index -B -M reference >current &&
t4008: abstract away SHA-1-specific constants Adjust the test so that it computes variables for blobs instead of using hard-coded hashes. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-21 05:01:35 +03:00
cat >expect <<-EOF &&
:100644 100644 $blob1_id $blob1_id R100 file1 file0
:100644 100644 $blob0_id $blob0_id R100 file0 file1
t4008: modernise style Update this ancient test script to a more modern style in which the expected result is prepared inside the body of the test that uses it. Also, instead of using $tree, a shell variable, throughout the test script, create a tag that points at it, to make it easier to manually debug the test script in its trash directory. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-02-16 01:21:04 +03:00
EOF
compare_diff_raw expect current
'
test_expect_success 'make file0 into something completely different' '
rm -f file0 &&
test_ln_s_add frotz file0 &&
t4008: abstract away SHA-1-specific constants Adjust the test so that it computes variables for blobs instead of using hard-coded hashes. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-21 05:01:35 +03:00
slink_id=$(printf frotz | git hash-object --stdin) &&
t4008: modernise style Update this ancient test script to a more modern style in which the expected result is prepared inside the body of the test that uses it. Also, instead of using $tree, a shell variable, throughout the test script, create a tag that points at it, to make it easier to manually debug the test script in its trash directory. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-02-16 01:21:04 +03:00
git update-index file1
'
test_expect_success 'run diff with -B (#5)' '
git diff-index -B reference >current &&
t4008: abstract away SHA-1-specific constants Adjust the test so that it computes variables for blobs instead of using hard-coded hashes. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-21 05:01:35 +03:00
cat >expect <<-EOF &&
:100644 120000 $blob0_id $slink_id T file0
:100644 100644 $blob1_id $blob0_id M100 file1
t4008: modernise style Update this ancient test script to a more modern style in which the expected result is prepared inside the body of the test that uses it. Also, instead of using $tree, a shell variable, throughout the test script, create a tag that points at it, to make it easier to manually debug the test script in its trash directory. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-02-16 01:21:04 +03:00
EOF
compare_diff_raw expect current
'
test_expect_success 'run diff with -B -M (#6)' '
git diff-index -B -M reference >current &&
# file0 changed from regular to symlink. file1 is the same as the preimage
# of file0. Because the change does not make file0 disappear, file1 is
# denoted as a copy of file0
t4008: abstract away SHA-1-specific constants Adjust the test so that it computes variables for blobs instead of using hard-coded hashes. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-21 05:01:35 +03:00
cat >expect <<-EOF &&
:100644 120000 $blob0_id $slink_id T file0
:100644 100644 $blob0_id $blob0_id C file0 file1
t4008: modernise style Update this ancient test script to a more modern style in which the expected result is prepared inside the body of the test that uses it. Also, instead of using $tree, a shell variable, throughout the test script, create a tag that points at it, to make it easier to manually debug the test script in its trash directory. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-02-16 01:21:04 +03:00
EOF
compare_diff_raw expect current
'
test_expect_success 'run diff with -M (#7)' '
git diff-index -M reference >current &&
# This should not mistake file0 as the copy source of new file1
# due to type differences.
t4008: abstract away SHA-1-specific constants Adjust the test so that it computes variables for blobs instead of using hard-coded hashes. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-21 05:01:35 +03:00
cat >expect <<-EOF &&
:100644 120000 $blob0_id $slink_id T file0
:100644 100644 $blob1_id $blob0_id M file1
t4008: modernise style Update this ancient test script to a more modern style in which the expected result is prepared inside the body of the test that uses it. Also, instead of using $tree, a shell variable, throughout the test script, create a tag that points at it, to make it easier to manually debug the test script in its trash directory. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-02-16 01:21:04 +03:00
EOF
compare_diff_raw expect current
'
test_expect_success 'file1 edited to look like file0 and file0 rename-edited to file2' '
rm -f file0 file1 &&
git read-tree -m reference &&
git checkout-index -f -u -a &&
sed -e "s/git/GIT/" file0 >file1 &&
sed -e "s/git/GET/" file0 >file2 &&
t4008: abstract away SHA-1-specific constants Adjust the test so that it computes variables for blobs instead of using hard-coded hashes. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-21 05:01:35 +03:00
blob3_id=$(git hash-object file2) &&
t4008: modernise style Update this ancient test script to a more modern style in which the expected result is prepared inside the body of the test that uses it. Also, instead of using $tree, a shell variable, throughout the test script, create a tag that points at it, to make it easier to manually debug the test script in its trash directory. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-02-16 01:21:04 +03:00
rm -f file0 &&
git update-index --add --remove file0 file1 file2
'
test_expect_success 'run diff with -B (#8)' '
git diff-index -B reference >current &&
t4008: abstract away SHA-1-specific constants Adjust the test so that it computes variables for blobs instead of using hard-coded hashes. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-21 05:01:35 +03:00
cat >expect <<-EOF &&
:100644 000000 $blob0_id $ZERO_OID D file0
:100644 100644 $blob1_id $blob2_id M100 file1
:000000 100644 $ZERO_OID $blob3_id A file2
t4008: modernise style Update this ancient test script to a more modern style in which the expected result is prepared inside the body of the test that uses it. Also, instead of using $tree, a shell variable, throughout the test script, create a tag that points at it, to make it easier to manually debug the test script in its trash directory. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-02-16 01:21:04 +03:00
EOF
compare_diff_raw expect current
'
test_expect_success 'run diff with -B -C (#9)' '
git diff-index -B -C reference >current &&
t4008: abstract away SHA-1-specific constants Adjust the test so that it computes variables for blobs instead of using hard-coded hashes. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-21 05:01:35 +03:00
cat >expect <<-EOF &&
:100644 100644 $blob0_id $blob2_id C095 file0 file1
:100644 100644 $blob0_id $blob3_id R095 file0 file2
t4008: modernise style Update this ancient test script to a more modern style in which the expected result is prepared inside the body of the test that uses it. Also, instead of using $tree, a shell variable, throughout the test script, create a tag that points at it, to make it easier to manually debug the test script in its trash directory. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-02-16 01:21:04 +03:00
EOF
compare_diff_raw expect current
'
[PATCH] Add -B flag to diff-* brothers. A new diffcore transformation, diffcore-break.c, is introduced. When the -B flag is given, a patch that represents a complete rewrite is broken into a deletion followed by a creation. This makes it easier to review such a complete rewrite patch. The -B flag takes the same syntax as the -M and -C flags to specify the minimum amount of non-source material the resulting file needs to have to be considered a complete rewrite, and defaults to 99% if not specified. As the new test t4008-diff-break-rewrite.sh demonstrates, if a file is a complete rewrite, it is broken into a delete/create pair, which can further be subjected to the usual rename detection if -M or -C is used. For example, if file0 gets completely rewritten to make it as if it were rather based on file1 which itself disappeared, the following happens: The original change looks like this: file0 --> file0' (quite different from file0) file1 --> /dev/null After diffcore-break runs, it would become this: file0 --> /dev/null /dev/null --> file0' file1 --> /dev/null Then diffcore-rename matches them up: file1 --> file0' The internal score values are finer grained now. Earlier maximum of 10000 has been raised to 60000; there is no user visible changes but there is no reason to waste available bits. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-30 11:08:37 +04:00
test_done