a0f83e7776
When we're going to run an external diff, we have to make the contents
of the pre- and post-images available either by dumping them to a
tempfile, or by pointing at a valid file in the worktree. The logic of
this is all handled by prepare_temp_file(), and we just pass in the
filename and the diff_filespec.
But there's a gotcha here. The "filename" we have is a logical filename
and not necessarily a path on disk or in the repository. This matters in
at least one case: when using "--relative", we may have a name like
"foo", even though the file content is found at "subdir/foo". As a
result, we look for the wrong path, fail to find "foo", and claim that
the file has been deleted (passing "/dev/null" to the external diff,
rather than the correct worktree path).
We can fix this by passing the pathname from the diff_filespec, which
should always be a full repository path (and that's what we want even if
reusing a worktree file, since we're always operating from the top-level
of the working tree).
The breakage seems to go all the way back to cd676a5136 (diff
--relative: output paths as relative to the current subdirectory,
2008-02-12). As far as I can tell, before then "name" would always have
been the same as the filespec's "path".
There are two related cases I looked at that aren't buggy:
1. the only other caller of prepare_temp_file() is run_textconv(). But
it always passes the filespec's path field, so it's OK.
2. I wondered if file renames/copies might cause similar confusion.
But they don't, because run_external_diff() receives two names in
that case: "name" and "other", which correspond to the two sides of
the diff. And we did correctly pass "other" when handling the
post-image side. Barring the use of "--relative", that would always
match "two->path", the path of the second filespec (and the rename
destination).
So the only bug is just the interaction with external diff drivers and
--relative.
Reported-by: Carl Baldwin <carl@ecbaldwin.net>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
248 lines
6.0 KiB
Bash
Executable File
248 lines
6.0 KiB
Bash
Executable File
#!/bin/sh
|
|
|
|
test_description='diff --relative tests'
|
|
. ./test-lib.sh
|
|
|
|
test_expect_success 'setup' '
|
|
git commit --allow-empty -m empty &&
|
|
echo content >file1 &&
|
|
mkdir subdir &&
|
|
echo other content >subdir/file2 &&
|
|
blob_file1=$(git hash-object file1) &&
|
|
blob_file2=$(git hash-object subdir/file2) &&
|
|
git add . &&
|
|
git commit -m one
|
|
'
|
|
|
|
check_diff () {
|
|
dir=$1
|
|
shift
|
|
expect=$1
|
|
shift
|
|
short_blob=$(git rev-parse --short $blob_file2)
|
|
cat >expected <<-EOF
|
|
diff --git a/$expect b/$expect
|
|
new file mode 100644
|
|
index 0000000..$short_blob
|
|
--- /dev/null
|
|
+++ b/$expect
|
|
@@ -0,0 +1 @@
|
|
+other content
|
|
EOF
|
|
test_expect_success "-p $*" "
|
|
git -C '$dir' diff -p $* HEAD^ >actual &&
|
|
test_cmp expected actual
|
|
"
|
|
}
|
|
|
|
check_numstat () {
|
|
dir=$1
|
|
shift
|
|
expect=$1
|
|
shift
|
|
cat >expected <<-EOF
|
|
1 0 $expect
|
|
EOF
|
|
test_expect_success "--numstat $*" "
|
|
echo '1 0 $expect' >expected &&
|
|
git -C '$dir' diff --numstat $* HEAD^ >actual &&
|
|
test_cmp expected actual
|
|
"
|
|
}
|
|
|
|
check_stat () {
|
|
dir=$1
|
|
shift
|
|
expect=$1
|
|
shift
|
|
cat >expected <<-EOF
|
|
$expect | 1 +
|
|
1 file changed, 1 insertion(+)
|
|
EOF
|
|
test_expect_success "--stat $*" "
|
|
git -C '$dir' diff --stat $* HEAD^ >actual &&
|
|
test_cmp expected actual
|
|
"
|
|
}
|
|
|
|
check_raw () {
|
|
dir=$1
|
|
shift
|
|
expect=$1
|
|
shift
|
|
cat >expected <<-EOF
|
|
:000000 100644 $ZERO_OID $blob_file2 A $expect
|
|
EOF
|
|
test_expect_success "--raw $*" "
|
|
git -C '$dir' diff --no-abbrev --raw $* HEAD^ >actual &&
|
|
test_cmp expected actual
|
|
"
|
|
}
|
|
|
|
for type in diff numstat stat raw
|
|
do
|
|
check_$type . file2 --relative=subdir/
|
|
check_$type . file2 --relative=subdir
|
|
check_$type subdir file2 --relative
|
|
check_$type . dir/file2 --relative=sub
|
|
done
|
|
|
|
check_diff_relative_option () {
|
|
dir=$1
|
|
shift
|
|
expect=$1
|
|
shift
|
|
relative_opt=$1
|
|
shift
|
|
test_expect_success "config diff.relative $relative_opt -p $*" "
|
|
short_blob=\$(git rev-parse --short $blob_file2) &&
|
|
cat >expected <<-EOF &&
|
|
diff --git a/$expect b/$expect
|
|
new file mode 100644
|
|
index 0000000..\$short_blob
|
|
--- /dev/null
|
|
+++ b/$expect
|
|
@@ -0,0 +1 @@
|
|
+other content
|
|
EOF
|
|
test_config -C $dir diff.relative $relative_opt &&
|
|
git -C '$dir' diff -p $* HEAD^ >actual &&
|
|
test_cmp expected actual
|
|
"
|
|
}
|
|
|
|
check_diff_no_relative_option () {
|
|
dir=$1
|
|
shift
|
|
expect=$1
|
|
shift
|
|
relative_opt=$1
|
|
shift
|
|
test_expect_success "config diff.relative $relative_opt -p $*" "
|
|
short_blob_file1=\$(git rev-parse --short $blob_file1) &&
|
|
short_blob_file2=\$(git rev-parse --short $blob_file2) &&
|
|
cat >expected <<-EOF &&
|
|
diff --git a/file1 b/file1
|
|
new file mode 100644
|
|
index 0000000..\$short_blob_file1
|
|
--- /dev/null
|
|
+++ b/file1
|
|
@@ -0,0 +1 @@
|
|
+content
|
|
diff --git a/$expect b/$expect
|
|
new file mode 100644
|
|
index 0000000..\$short_blob_file2
|
|
--- /dev/null
|
|
+++ b/$expect
|
|
@@ -0,0 +1 @@
|
|
+other content
|
|
EOF
|
|
test_config -C $dir diff.relative $relative_opt &&
|
|
git -C '$dir' diff -p $* HEAD^ >actual &&
|
|
test_cmp expected actual
|
|
"
|
|
}
|
|
|
|
check_diff_no_relative_option . subdir/file2 false
|
|
check_diff_no_relative_option . subdir/file2 true --no-relative
|
|
check_diff_no_relative_option . subdir/file2 false --no-relative
|
|
check_diff_no_relative_option subdir subdir/file2 false
|
|
check_diff_no_relative_option subdir subdir/file2 true --no-relative
|
|
check_diff_no_relative_option subdir subdir/file2 false --no-relative
|
|
|
|
check_diff_relative_option . file2 false --relative=subdir/
|
|
check_diff_relative_option . file2 false --relative=subdir
|
|
check_diff_relative_option . file2 true --relative=subdir/
|
|
check_diff_relative_option . file2 true --relative=subdir
|
|
check_diff_relative_option subdir file2 false --relative
|
|
check_diff_relative_option subdir file2 true --relative
|
|
check_diff_relative_option subdir file2 true
|
|
check_diff_relative_option subdir file2 false --no-relative --relative
|
|
check_diff_relative_option subdir file2 true --no-relative --relative
|
|
check_diff_relative_option . file2 false --no-relative --relative=subdir
|
|
check_diff_relative_option . file2 true --no-relative --relative=subdir
|
|
|
|
test_expect_success 'external diff with --relative' '
|
|
test_when_finished "git reset --hard" &&
|
|
echo changed >file1 &&
|
|
echo changed >subdir/file2 &&
|
|
|
|
write_script mydiff <<-\EOF &&
|
|
# hacky pretend diff; the goal here is just to make sure we got
|
|
# passed sensible input that we _could_ diff, without relying on
|
|
# the specific output of a system diff tool.
|
|
echo "diff a/$1 b/$1" &&
|
|
echo "--- a/$1" &&
|
|
echo "+++ b/$1" &&
|
|
echo "@@ -1 +0,0 @@" &&
|
|
sed "s/^/-/" "$2" &&
|
|
sed "s/^/+/" "$5"
|
|
EOF
|
|
|
|
cat >expect <<-\EOF &&
|
|
diff a/file2 b/file2
|
|
--- a/file2
|
|
+++ b/file2
|
|
@@ -1 +0,0 @@
|
|
-other content
|
|
+changed
|
|
EOF
|
|
GIT_EXTERNAL_DIFF=./mydiff git diff --relative=subdir >actual &&
|
|
test_cmp expect actual
|
|
'
|
|
|
|
test_expect_success 'setup diff --relative unmerged' '
|
|
test_commit zero file0 &&
|
|
test_commit base subdir/file0 &&
|
|
git switch -c br1 &&
|
|
test_commit one file0 &&
|
|
test_commit sub1 subdir/file0 &&
|
|
git switch -c br2 base &&
|
|
test_commit two file0 &&
|
|
git switch -c br3 &&
|
|
test_commit sub3 subdir/file0
|
|
'
|
|
|
|
test_expect_success 'diff --relative without change in subdir' '
|
|
git switch br2 &&
|
|
test_when_finished "git merge --abort" &&
|
|
test_must_fail git merge one &&
|
|
git -C subdir diff --relative >out &&
|
|
test_must_be_empty out &&
|
|
git -C subdir diff --relative --name-only >out &&
|
|
test_must_be_empty out
|
|
'
|
|
|
|
test_expect_success 'diff --relative --name-only with change in subdir' '
|
|
git switch br3 &&
|
|
test_when_finished "git merge --abort" &&
|
|
test_must_fail git merge sub1 &&
|
|
test_write_lines file0 file0 >expected &&
|
|
git -C subdir diff --relative --name-only >out &&
|
|
test_cmp expected out
|
|
'
|
|
|
|
test_expect_failure 'diff --relative with change in subdir' '
|
|
git switch br3 &&
|
|
br1_blob=$(git rev-parse --short --verify br1:subdir/file0) &&
|
|
br3_blob=$(git rev-parse --short --verify br3:subdir/file0) &&
|
|
test_when_finished "git merge --abort" &&
|
|
test_must_fail git merge br1 &&
|
|
cat >expected <<-EOF &&
|
|
diff --cc file0
|
|
index $br3_blob,$br1_blob..0000000
|
|
--- a/file0
|
|
+++ b/file0
|
|
@@@ -1,1 -1,1 +1,5 @@@
|
|
++<<<<<<< HEAD
|
|
+sub3
|
|
++=======
|
|
+ sub1
|
|
++>>>>>>> br1
|
|
EOF
|
|
git -C subdir diff --relative >out &&
|
|
test_cmp expected out
|
|
'
|
|
|
|
test_done
|