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b1c2f57db3
If you use "-G" to grep a diff, we will apply a configured textconv filter to the data before generating the diff. However, if the diff is an addition or deletion, we do not bother running the diff at all, and just look for the token in the added (or removed) content. This works because we know that the diff must contain every line of content. However, while we used the textconv-derived buffers in the regular diff, we accidentally passed the original unmodified buffers to regexec when checking the added or removed content. This could lead to an incorrect answer. Worse, in some cases we might have a textconv buffer but no original buffer (e.g., if we pulled the textconv data from cache, or if we reused a working tree file when generating it). In that case, we could actually feed NULL to regexec and segfault. Reported-by: Peter Oberndorfer <kumbayo84@arcor.de> Signed-off-by: Jeff King <peff@peff.net>
143 lines
3.2 KiB
Bash
Executable File
143 lines
3.2 KiB
Bash
Executable File
#!/bin/sh
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test_description='diff.*.textconv tests'
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. ./test-lib.sh
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find_diff() {
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sed '1,/^index /d' | sed '/^-- $/,$d'
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}
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cat >expect.binary <<'EOF'
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Binary files a/file and b/file differ
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EOF
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cat >expect.text <<'EOF'
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--- a/file
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+++ b/file
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@@ -1 +1,2 @@
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0
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+1
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EOF
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cat >hexdump <<'EOF'
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#!/bin/sh
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"$PERL_PATH" -e '$/ = undef; $_ = <>; s/./ord($&)/ge; print $_' < "$1"
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EOF
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chmod +x hexdump
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test_expect_success 'setup binary file with history' '
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printf "\\0\\n" >file &&
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git add file &&
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git commit -m one &&
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printf "\\01\\n" >>file &&
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git add file &&
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git commit -m two
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'
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test_expect_success 'file is considered binary by porcelain' '
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git diff HEAD^ HEAD >diff &&
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find_diff <diff >actual &&
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test_cmp expect.binary actual
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'
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test_expect_success 'file is considered binary by plumbing' '
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git diff-tree -p HEAD^ HEAD >diff &&
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find_diff <diff >actual &&
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test_cmp expect.binary actual
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'
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test_expect_success 'setup textconv filters' '
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echo file diff=foo >.gitattributes &&
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git config diff.foo.textconv "\"$(pwd)\""/hexdump &&
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git config diff.fail.textconv false
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'
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test_expect_success 'diff produces text' '
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git diff HEAD^ HEAD >diff &&
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find_diff <diff >actual &&
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test_cmp expect.text actual
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'
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test_expect_success 'diff-tree produces binary' '
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git diff-tree -p HEAD^ HEAD >diff &&
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find_diff <diff >actual &&
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test_cmp expect.binary actual
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'
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test_expect_success 'log produces text' '
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git log -1 -p >log &&
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find_diff <log >actual &&
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test_cmp expect.text actual
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'
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test_expect_success 'format-patch produces binary' '
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git format-patch --no-binary --stdout HEAD^ >patch &&
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find_diff <patch >actual &&
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test_cmp expect.binary actual
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'
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test_expect_success 'status -v produces text' '
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git reset --soft HEAD^ &&
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git status -v >diff &&
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find_diff <diff >actual &&
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test_cmp expect.text actual &&
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git reset --soft HEAD@{1}
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'
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test_expect_success 'grep-diff (-G) operates on textconv data (add)' '
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echo one >expect &&
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git log --root --format=%s -G0 >actual &&
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test_cmp expect actual
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'
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test_expect_success 'grep-diff (-G) operates on textconv data (modification)' '
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echo two >expect &&
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git log --root --format=%s -G1 >actual &&
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test_cmp expect actual
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'
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cat >expect.stat <<'EOF'
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file | Bin 2 -> 4 bytes
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1 file changed, 0 insertions(+), 0 deletions(-)
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EOF
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test_expect_success 'diffstat does not run textconv' '
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echo file diff=fail >.gitattributes &&
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git diff --stat HEAD^ HEAD >actual &&
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test_i18ncmp expect.stat actual &&
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head -n1 <expect.stat >expect.line1 &&
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head -n1 <actual >actual.line1 &&
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test_cmp expect.line1 actual.line1
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'
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# restore working setup
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echo file diff=foo >.gitattributes
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cat >expect.typechange <<'EOF'
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--- a/file
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+++ /dev/null
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@@ -1,2 +0,0 @@
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-0
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-1
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diff --git a/file b/file
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new file mode 120000
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index 0000000..67be421
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--- /dev/null
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+++ b/file
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@@ -0,0 +1 @@
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+frotz
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\ No newline at end of file
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EOF
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# make a symlink the hard way that works on symlink-challenged file systems
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test_expect_success 'textconv does not act on symlinks' '
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printf frotz > file &&
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git add file &&
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git ls-files -s | sed -e s/100644/120000/ |
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git update-index --index-info &&
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git commit -m typechange &&
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git show >diff &&
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find_diff <diff >actual &&
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test_cmp expect.typechange actual
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'
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test_done
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