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6936b5859c
Starting from a single file, A, if you create B as a copy of A (and
possibly make some edit) and then make extensive change to A, you
will see:
$ git diff -C --name-status
C89 A B
M A
which is expected. However, if you ask the same question in a
different way, you see this:
$ git diff -B -M --name-status
R89 A B
M100 A
telling us that A was rename-edited into B (as if "A will no longer
exist as the result") and at the same time A itself was extensively
edited.
In this case, because the resulting tree still does have file A
(even if it has contents vastly different from the original), we
should use "C"opy, not "R"ename, to avoid hinting that A somehow
goes away.
Two existing tests were depending on the wrong behaviour, and fixed.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
189 lines
6.1 KiB
Bash
Executable File
189 lines
6.1 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (c) 2005 Junio C Hamano
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#
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test_description='Break and then rename
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We have two very different files, file0 and file1, registered in a tree.
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We update file1 so drastically that it is more similar to file0, and
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then remove file0. With -B, changes to file1 should be broken into
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separate delete and create, resulting in removal of file0, removal of
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original file1 and creation of completely rewritten file1.
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Further, with -B and -M together, these three modifications should
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turn into rename-edit of file0 into file1.
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Starting from the same two files in the tree, we swap file0 and file1.
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With -B, this should be detected as two complete rewrites, resulting in
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four changes in total.
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Further, with -B and -M together, these should turn into two renames.
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'
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. ./test-lib.sh
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. "$TEST_DIRECTORY"/diff-lib.sh ;# test-lib chdir's into trash
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test_expect_success \
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setup \
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'cat "$TEST_DIRECTORY"/../README >file0 &&
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cat "$TEST_DIRECTORY"/../COPYING >file1 &&
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git update-index --add file0 file1 &&
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tree=$(git write-tree) &&
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echo "$tree"'
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test_expect_success \
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'change file1 with copy-edit of file0 and remove file0' \
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'sed -e "s/git/GIT/" file0 >file1 &&
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rm -f file0 &&
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git update-index --remove file0 file1'
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test_expect_success \
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'run diff with -B' \
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'git diff-index -B --cached "$tree" >current'
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cat >expected <<\EOF
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:100644 000000 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 0000000000000000000000000000000000000000 D file0
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:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 11e331465a89c394dc25c780de230043750c1ec8 M100 file1
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EOF
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test_expect_success \
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'validate result of -B (#1)' \
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'compare_diff_raw expected current'
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test_expect_success \
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'run diff with -B and -M' \
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'git diff-index -B -M "$tree" >current'
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cat >expected <<\EOF
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:100644 100644 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 08bb2fb671deff4c03a4d4a0a1315dff98d5732c R100 file0 file1
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EOF
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test_expect_success \
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'validate result of -B -M (#2)' \
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'compare_diff_raw expected current'
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test_expect_success \
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'swap file0 and file1' \
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'rm -f file0 file1 &&
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git read-tree -m $tree &&
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git checkout-index -f -u -a &&
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mv file0 tmp &&
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mv file1 file0 &&
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mv tmp file1 &&
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git update-index file0 file1'
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test_expect_success \
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'run diff with -B' \
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'git diff-index -B "$tree" >current'
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cat >expected <<\EOF
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:100644 100644 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 6ff87c4664981e4397625791c8ea3bbb5f2279a3 M100 file0
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:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 M100 file1
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EOF
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test_expect_success \
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'validate result of -B (#3)' \
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'compare_diff_raw expected current'
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test_expect_success \
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'run diff with -B and -M' \
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'git diff-index -B -M "$tree" >current'
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cat >expected <<\EOF
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:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 6ff87c4664981e4397625791c8ea3bbb5f2279a3 R100 file1 file0
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:100644 100644 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 R100 file0 file1
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EOF
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test_expect_success \
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'validate result of -B -M (#4)' \
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'compare_diff_raw expected current'
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test_expect_success \
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'make file0 into something completely different' \
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'rm -f file0 &&
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test_ln_s_add frotz file0 &&
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git update-index file1'
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test_expect_success \
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'run diff with -B' \
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'git diff-index -B "$tree" >current'
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cat >expected <<\EOF
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:100644 120000 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 67be421f88824578857624f7b3dc75e99a8a1481 T file0
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:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 M100 file1
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EOF
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test_expect_success \
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'validate result of -B (#5)' \
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'compare_diff_raw expected current'
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test_expect_success \
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'run diff with -B -M' \
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'git diff-index -B -M "$tree" >current'
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# file0 changed from regular to symlink. file1 is very close to the preimage of file0.
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# the change does not make file0 disappear, so file1 is denoted as a copy of file0
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cat >expected <<\EOF
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:100644 120000 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 67be421f88824578857624f7b3dc75e99a8a1481 T file0
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:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 C file0 file1
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EOF
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test_expect_success \
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'validate result of -B -M (#6)' \
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'compare_diff_raw expected current'
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test_expect_success \
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'run diff with -M' \
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'git diff-index -M "$tree" >current'
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# This should not mistake file0 as the copy source of new file1
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# due to type differences.
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cat >expected <<\EOF
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:100644 120000 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 67be421f88824578857624f7b3dc75e99a8a1481 T file0
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:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 M file1
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EOF
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test_expect_success \
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'validate result of -M (#7)' \
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'compare_diff_raw expected current'
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test_expect_success \
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'file1 edited to look like file0 and file0 rename-edited to file2' \
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'rm -f file0 file1 &&
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git read-tree -m $tree &&
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git checkout-index -f -u -a &&
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sed -e "s/git/GIT/" file0 >file1 &&
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sed -e "s/git/GET/" file0 >file2 &&
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rm -f file0 &&
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git update-index --add --remove file0 file1 file2'
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test_expect_success \
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'run diff with -B' \
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'git diff-index -B "$tree" >current'
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cat >expected <<\EOF
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:100644 000000 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 0000000000000000000000000000000000000000 D file0
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:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 08bb2fb671deff4c03a4d4a0a1315dff98d5732c M100 file1
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:000000 100644 0000000000000000000000000000000000000000 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 A file2
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EOF
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test_expect_success \
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'validate result of -B (#8)' \
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'compare_diff_raw expected current'
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test_expect_success \
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'run diff with -B -C' \
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'git diff-index -B -C "$tree" >current'
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cat >expected <<\EOF
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:100644 100644 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 08bb2fb671deff4c03a4d4a0a1315dff98d5732c C095 file0 file1
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:100644 100644 f5deac7be59e7eeab8657fd9ae706fd6a57daed2 59f832e5c8b3f7e486be15ad0cd3e95ba9af8998 R095 file0 file2
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EOF
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test_expect_success \
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'validate result of -B -M (#9)' \
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'compare_diff_raw expected current'
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test_done
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