upload-pack: send shallow info over stdin to pack-objects

diff --git a/t/t4020-diff-external.sh b/t/t4020-diff-external.sh
index 025df533ca8969e67c38f8dcb913c9021b816c57..bcae35ac1c93aaf79032db5ee09fd2d3400101f5 100755 (executable)
--- a/t/t4020-diff-external.sh
+++ b/t/t4020-diff-external.sh
@@ -65,6 +65,33 @@ test_expect_success SYMLINKS 'typechange diff' '
        test_cmp expect actual
 '
 
+test_expect_success 'diff.external' '
+       git reset --hard &&
+       echo third >file &&
+       test_config diff.external echo &&
+       git diff | {
+               read path oldfile oldhex oldmode newfile newhex newmode &&
+               test "z$path" = zfile &&
+               test "z$oldmode" = z100644 &&
+               test "z$newhex" = "z$_z40" &&
+               test "z$newmode" = z100644 &&
+               oh=$(git rev-parse --verify HEAD:file) &&
+               test "z$oh" = "z$oldhex"
+       }
+'
+
+test_expect_success 'diff.external should apply only to diff' '
+       test_config diff.external echo &&
+       git log -p -1 HEAD |
+       grep "^diff --git a/file b/file"
+'
+
+test_expect_success 'diff.external and --no-ext-diff' '
+       test_config diff.external echo &&
+       git diff --no-ext-diff |
+       grep "^diff --git a/file b/file"
+'
+
 test_expect_success 'diff attribute' '
        git reset --hard &&
        echo third >file &&
@@ -132,6 +159,19 @@ test_expect_success 'diff attribute and --no-ext-diff' '
 
 '
 
+test_expect_success 'GIT_EXTERNAL_DIFF trumps diff.external' '
+       >.gitattributes &&
+       test_config diff.external "echo ext-global" &&
+       GIT_EXTERNAL_DIFF="echo ext-env" git diff | grep ext-env
+'
+
+test_expect_success 'attributes trump GIT_EXTERNAL_DIFF and diff.external' '
+       test_config diff.foo.command "echo ext-attribute" &&
+       test_config diff.external "echo ext-global" &&
+       echo "file diff=foo" >.gitattributes &&
+       GIT_EXTERNAL_DIFF="echo ext-env" git diff | grep ext-attribute
+'
+
 test_expect_success 'no diff with -diff' '
        echo >.gitattributes "file -diff" &&
        git diff | grep Binary
@@ -153,6 +193,19 @@ test_expect_success 'GIT_EXTERNAL_DIFF with more than one changed files' '
        GIT_EXTERNAL_DIFF=echo git diff
 '
 
+test_expect_success 'GIT_EXTERNAL_DIFF path counter/total' '
+       write_script external-diff.sh <<-\EOF &&
+       echo $GIT_DIFF_PATH_COUNTER of $GIT_DIFF_PATH_TOTAL >>counter.txt
+       EOF
+       >counter.txt &&
+       cat >expect <<-\EOF &&
+       1 of 2
+       2 of 2
+       EOF
+       GIT_EXTERNAL_DIFF=./external-diff.sh git diff &&
+       test_cmp expect counter.txt
+'
+
 test_expect_success 'GIT_EXTERNAL_DIFF generates pretty paths' '
        touch file.ext &&
        git add file.ext &&