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authorJeff King <peff@peff.net>2011-05-23 16:27:34 -0400
committerJunio C Hamano <gitster@pobox.com>2011-05-23 15:43:43 -0700
commit4d5f34719970274990cded2201957eb2262bca10 (patch)
tree244a8649d9783237d7d83f123946593cd57a3b3f /t/t4048-diff-combined-binary.sh
parentc95b99bb5d5f3aed88f8154371a813ebd0d2fa1d (diff)
downloadgit-4d5f34719970274990cded2201957eb2262bca10.tar.gz
combine-diff: handle binary files as binary
The combined diff code path is totally different from the regular diff code path, and didn't handle binary files at all. The results of a combined diff on a binary file could range from annoying (since we spewed binary garbage, possibly upsetting the user's terminal), to wrong (embedded NULs caused us to show incorrect diffs, with lines truncated at the NUL character), to potential security problems (embedded NULs could interfere with "-z" output, possibly defeating policy hooks which parse diff output). Instead, we consider a combined diff to be binary if any of the input blobs is binary. To show a binary combined diff, we indicate "Binary blobs differ"; the "index" meta line will show which parents had which blob. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 't/t4048-diff-combined-binary.sh')
-rwxr-xr-xt/t4048-diff-combined-binary.sh113
1 files changed, 113 insertions, 0 deletions
diff --git a/t/t4048-diff-combined-binary.sh b/t/t4048-diff-combined-binary.sh
new file mode 100755
index 0000000000..a943994b07
--- /dev/null
+++ b/t/t4048-diff-combined-binary.sh
@@ -0,0 +1,113 @@
+#!/bin/sh
+
+test_description='combined and merge diff handle binary files and textconv'
+. ./test-lib.sh
+
+test_expect_success 'setup binary merge conflict' '
+ echo oneQ1 | q_to_nul >binary &&
+ git add binary &&
+ git commit -m one &&
+ echo twoQ2 | q_to_nul >binary &&
+ git commit -a -m two &&
+ git checkout -b branch-binary HEAD^ &&
+ echo threeQ3 | q_to_nul >binary &&
+ git commit -a -m three &&
+ test_must_fail git merge master &&
+ echo resolvedQhooray | q_to_nul >binary &&
+ git commit -a -m resolved
+'
+
+cat >expect <<'EOF'
+resolved
+
+diff --git a/binary b/binary
+index 7ea6ded..9563691 100644
+Binary files a/binary and b/binary differ
+resolved
+
+diff --git a/binary b/binary
+index 6197570..9563691 100644
+Binary files a/binary and b/binary differ
+EOF
+test_expect_success 'diff -m indicates binary-ness' '
+ git show --format=%s -m >actual &&
+ test_cmp expect actual
+'
+
+cat >expect <<'EOF'
+resolved
+
+diff --combined binary
+index 7ea6ded,6197570..9563691
+Binary files differ
+EOF
+test_expect_success 'diff -c indicates binary-ness' '
+ git show --format=%s -c >actual &&
+ test_cmp expect actual
+'
+
+cat >expect <<'EOF'
+resolved
+
+diff --cc binary
+index 7ea6ded,6197570..9563691
+Binary files differ
+EOF
+test_expect_success 'diff --cc indicates binary-ness' '
+ git show --format=%s --cc >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'setup non-binary with binary attribute' '
+ git checkout master &&
+ test_commit one text &&
+ test_commit two text &&
+ git checkout -b branch-text HEAD^ &&
+ test_commit three text &&
+ test_must_fail git merge master &&
+ test_commit resolved text &&
+ echo text -diff >.gitattributes
+'
+
+cat >expect <<'EOF'
+resolved
+
+diff --git a/text b/text
+index 2bdf67a..2ab19ae 100644
+Binary files a/text and b/text differ
+resolved
+
+diff --git a/text b/text
+index f719efd..2ab19ae 100644
+Binary files a/text and b/text differ
+EOF
+test_expect_success 'diff -m respects binary attribute' '
+ git show --format=%s -m >actual &&
+ test_cmp expect actual
+'
+
+cat >expect <<'EOF'
+resolved
+
+diff --combined text
+index 2bdf67a,f719efd..2ab19ae
+Binary files differ
+EOF
+test_expect_success 'diff -c respects binary attribute' '
+ git show --format=%s -c >actual &&
+ test_cmp expect actual
+'
+
+cat >expect <<'EOF'
+resolved
+
+diff --cc text
+index 2bdf67a,f719efd..2ab19ae
+Binary files differ
+EOF
+test_expect_success 'diff --cc respects binary attribute' '
+ git show --format=%s --cc >actual &&
+ test_cmp expect actual
+'
+
+test_done