#!/bin/sh

test_description='diff.*.textconv tests'
. ./test-lib.sh

find_diff() {
        sed '1,/^index /d' | sed '/^-- $/,$d'
}

cat >expect.binary <<'EOF'
Binary files a/file and b/file differ
EOF

cat >expect.text <<'EOF'
--- a/file
+++ b/file
@@ -1 +1,2 @@
 0
+1
EOF

cat >hexdump <<'EOF'
#!/bin/sh
"$PERL_PATH" -e '$/ = undef; $_ = <>; s/./ord($&)/ge; print $_' < "$1"
EOF
chmod +x hexdump

test_expect_success 'setup binary file with history' '
        printf "\\0\\n" >file &&
        git add file &&
        git commit -m one &&
        printf "\\01\\n" >>file &&
        git add file &&
        git commit -m two
'

test_expect_success 'file is considered binary by porcelain' '
        git diff HEAD^ HEAD >diff &&
        find_diff <diff >actual &&
        test_cmp expect.binary actual
'

test_expect_success 'file is considered binary by plumbing' '
        git diff-tree -p HEAD^ HEAD >diff &&
        find_diff <diff >actual &&
        test_cmp expect.binary actual
'

test_expect_success 'setup textconv filters' '
        echo file diff=foo >.gitattributes &&
        git config diff.foo.textconv "\"$(pwd)\""/hexdump &&
        git config diff.fail.textconv false
'

test_expect_success 'diff produces text' '
        git diff HEAD^ HEAD >diff &&
        find_diff <diff >actual &&
        test_cmp expect.text actual
'

test_expect_success 'diff-tree produces binary' '
        git diff-tree -p HEAD^ HEAD >diff &&
        find_diff <diff >actual &&
        test_cmp expect.binary actual
'

test_expect_success 'log produces text' '
        git log -1 -p >log &&
        find_diff <log >actual &&
        test_cmp expect.text actual
'

test_expect_success 'format-patch produces binary' '
        git format-patch --no-binary --stdout HEAD^ >patch &&
        find_diff <patch >actual &&
        test_cmp expect.binary actual
'

test_expect_success 'status -v produces text' '
        git reset --soft HEAD^ &&
        git status -v >diff &&
        find_diff <diff >actual &&
        test_cmp expect.text actual &&
        git reset --soft HEAD@{1}
'

test_expect_success 'grep-diff (-G) operates on textconv data (add)' '
        echo one >expect &&
        git log --root --format=%s -G0 >actual &&
        test_cmp expect actual
'

test_expect_success 'grep-diff (-G) operates on textconv data (modification)' '
        echo two >expect &&
        git log --root --format=%s -G1 >actual &&
        test_cmp expect actual
'

cat >expect.stat <<'EOF'
 file | Bin 2 -> 4 bytes
 1 file changed, 0 insertions(+), 0 deletions(-)
EOF
test_expect_success 'diffstat does not run textconv' '
        echo file diff=fail >.gitattributes &&
        git diff --stat HEAD^ HEAD >actual &&
        test_i18ncmp expect.stat actual &&

        head -n1 <expect.stat >expect.line1 &&
        head -n1 <actual >actual.line1 &&
        test_cmp expect.line1 actual.line1
'
# restore working setup
echo file diff=foo >.gitattributes

cat >expect.typechange <<'EOF'
--- a/file
+++ /dev/null
@@ -1,2 +0,0 @@
-0
-1
diff --git a/file b/file
new file mode 120000
index 0000000..67be421
--- /dev/null
+++ b/file
@@ -0,0 +1 @@
+frotz
\ No newline at end of file
EOF
# make a symlink the hard way that works on symlink-challenged file systems
test_expect_success 'textconv does not act on symlinks' '
        printf frotz > file &&
        git add file &&
        git ls-files -s | sed -e s/100644/120000/ |
                git update-index --index-info &&
        git commit -m typechange &&
        git show >diff &&
        find_diff <diff >actual &&
        test_cmp expect.typechange actual
'

test_done