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-rwxr-xr-xt/t4020-diff-external.sh274
1 files changed, 274 insertions, 0 deletions
diff --git a/t/t4020-diff-external.sh b/t/t4020-diff-external.sh
new file mode 100755
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+++ b/t/t4020-diff-external.sh
@@ -0,0 +1,274 @@
+#!/bin/sh
+
+test_description='external diff interface test'
+
+TEST_PASSES_SANITIZE_LEAK=true
+. ./test-lib.sh
+
+test_expect_success setup '
+
+ test_tick &&
+ echo initial >file &&
+ git add file &&
+ git commit -m initial &&
+
+ test_tick &&
+ echo second >file &&
+ before=$(git hash-object file) &&
+ before=$(git rev-parse --short $before) &&
+ git add file &&
+ git commit -m second &&
+
+ test_tick &&
+ echo third >file
+'
+
+test_expect_success 'GIT_EXTERNAL_DIFF environment' '
+ cat >expect <<-EOF &&
+ file $(git rev-parse --verify HEAD:file) 100644 file $(test_oid zero) 100644
+ EOF
+ GIT_EXTERNAL_DIFF=echo git diff >out &&
+ cut -d" " -f1,3- <out >actual &&
+ test_cmp expect actual
+
+'
+
+test_expect_success 'GIT_EXTERNAL_DIFF environment should apply only to diff' '
+ GIT_EXTERNAL_DIFF=echo git log -p -1 HEAD >out &&
+ grep "^diff --git a/file b/file" out
+
+'
+
+test_expect_success 'GIT_EXTERNAL_DIFF environment and --no-ext-diff' '
+ GIT_EXTERNAL_DIFF=echo git diff --no-ext-diff >out &&
+ grep "^diff --git a/file b/file" out
+
+'
+
+test_expect_success SYMLINKS 'typechange diff' '
+ rm -f file &&
+ ln -s elif file &&
+
+ cat >expect <<-EOF &&
+ file $(git rev-parse --verify HEAD:file) 100644 $(test_oid zero) 120000
+ EOF
+ GIT_EXTERNAL_DIFF=echo git diff >out &&
+ cut -d" " -f1,3-4,6- <out >actual &&
+ test_cmp expect actual &&
+
+ GIT_EXTERNAL_DIFF=echo git diff --no-ext-diff >actual &&
+ git diff >expect &&
+ test_cmp expect actual
+'
+
+test_expect_success 'diff.external' '
+ git reset --hard &&
+ echo third >file &&
+ test_config diff.external echo &&
+
+ cat >expect <<-EOF &&
+ file $(git rev-parse --verify HEAD:file) 100644 $(test_oid zero) 100644
+ EOF
+ git diff >out &&
+ cut -d" " -f1,3-4,6- <out >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'diff.external should apply only to diff' '
+ test_config diff.external echo &&
+ git log -p -1 HEAD >out &&
+ grep "^diff --git a/file b/file" out
+'
+
+test_expect_success 'diff.external and --no-ext-diff' '
+ test_config diff.external echo &&
+ git diff --no-ext-diff >out &&
+ grep "^diff --git a/file b/file" out
+'
+
+test_expect_success 'diff attribute' '
+ git reset --hard &&
+ echo third >file &&
+
+ git config diff.parrot.command echo &&
+
+ echo >.gitattributes "file diff=parrot" &&
+
+ cat >expect <<-EOF &&
+ file $(git rev-parse --verify HEAD:file) 100644 $(test_oid zero) 100644
+ EOF
+ git diff >out &&
+ cut -d" " -f1,3-4,6- <out >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success !SANITIZE_LEAK 'diff attribute should apply only to diff' '
+ git log -p -1 HEAD >out &&
+ grep "^diff --git a/file b/file" out
+
+'
+
+test_expect_success 'diff attribute and --no-ext-diff' '
+ git diff --no-ext-diff >out &&
+ grep "^diff --git a/file b/file" out
+
+'
+
+test_expect_success 'diff attribute' '
+
+ git config --unset diff.parrot.command &&
+ git config diff.color.command echo &&
+
+ echo >.gitattributes "file diff=color" &&
+
+ cat >expect <<-EOF &&
+ file $(git rev-parse --verify HEAD:file) 100644 $(test_oid zero) 100644
+ EOF
+ git diff >out &&
+ cut -d" " -f1,3-4,6- <out >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success !SANITIZE_LEAK 'diff attribute should apply only to diff' '
+ git log -p -1 HEAD >out &&
+ grep "^diff --git a/file b/file" out
+
+'
+
+test_expect_success 'diff attribute and --no-ext-diff' '
+ git diff --no-ext-diff >out &&
+ grep "^diff --git a/file b/file" out
+
+'
+
+test_expect_success 'GIT_EXTERNAL_DIFF trumps diff.external' '
+ >.gitattributes &&
+ test_config diff.external "echo ext-global" &&
+
+ cat >expect <<-EOF &&
+ ext-env file $(git rev-parse --verify HEAD:file) 100644 file $(test_oid zero) 100644
+ EOF
+ GIT_EXTERNAL_DIFF="echo ext-env" git diff >out &&
+ cut -d" " -f1-2,4- <out >actual &&
+ test_cmp expect actual
+'
+
+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 &&
+
+ cat >expect <<-EOF &&
+ ext-attribute file $(git rev-parse --verify HEAD:file) 100644 file $(test_oid zero) 100644
+ EOF
+ GIT_EXTERNAL_DIFF="echo ext-env" git diff >out &&
+ cut -d" " -f1-2,4- <out >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'no diff with -diff' '
+ echo >.gitattributes "file -diff" &&
+ git diff >out &&
+ grep Binary out
+'
+
+echo NULZbetweenZwords | perl -pe 'y/Z/\000/' > file
+
+test_expect_success 'force diff with "diff"' '
+ after=$(git hash-object file) &&
+ after=$(git rev-parse --short $after) &&
+ echo >.gitattributes "file diff" &&
+ git diff >actual &&
+ sed -e "s/^index .*/index $before..$after 100644/" \
+ "$TEST_DIRECTORY"/t4020/diff.NUL >expected-diff &&
+ test_cmp expected-diff actual
+'
+
+test_expect_success 'GIT_EXTERNAL_DIFF with more than one changed files' '
+ echo anotherfile > file2 &&
+ git add file2 &&
+ git commit -m "added 2nd file" &&
+ echo modified >file2 &&
+ 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' '
+ test_when_finished "git rm -f file.ext" &&
+ touch file.ext &&
+ git add file.ext &&
+ echo with extension > file.ext &&
+
+ cat >expect <<-EOF &&
+ file.ext
+ EOF
+ GIT_EXTERNAL_DIFF=echo git diff file.ext >out &&
+ basename $(cut -d" " -f2 <out) >actual &&
+ test_cmp expect actual
+'
+
+echo "#!$SHELL_PATH" >fake-diff.sh
+cat >> fake-diff.sh <<\EOF
+cat $2 >> crlfed.txt
+EOF
+chmod a+x fake-diff.sh
+
+keep_only_cr () {
+ tr -dc '\015'
+}
+
+test_expect_success 'external diff with autocrlf = true' '
+ test_config core.autocrlf true &&
+ GIT_EXTERNAL_DIFF=./fake-diff.sh git diff &&
+ test $(wc -l < crlfed.txt) = $(cat crlfed.txt | keep_only_cr | wc -c)
+'
+
+test_expect_success 'diff --cached' '
+ test_config core.autocrlf true &&
+ git add file &&
+ git update-index --assume-unchanged file &&
+ echo second >file &&
+ git diff --cached >actual &&
+ test_cmp expected-diff actual
+'
+
+test_expect_success 'clean up crlf leftovers' '
+ git update-index --no-assume-unchanged file &&
+ rm -f file* &&
+ git reset --hard
+'
+
+test_expect_success 'submodule diff' '
+ git init sub &&
+ ( cd sub && test_commit sub1 ) &&
+ git add sub &&
+ test_tick &&
+ git commit -m "add submodule" &&
+ ( cd sub && test_commit sub2 ) &&
+ write_script gather_pre_post.sh <<-\EOF &&
+ echo "$1 $4" # path, mode
+ cat "$2" # old file
+ cat "$5" # new file
+ EOF
+ GIT_EXTERNAL_DIFF=./gather_pre_post.sh git diff >actual &&
+ cat >expected <<-EOF &&
+ sub 160000
+ Subproject commit $(git rev-parse HEAD:sub)
+ Subproject commit $(cd sub && git rev-parse HEAD)
+ EOF
+ test_cmp expected actual
+'
+
+test_done