[PATCH v4] blame: CRLF in the working tree and LF in the repo

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A typical setup under Windows:
core.eol is CRLF and a file is marked as "text" in .gitattributes,
or core.autocrlf is true

After 4d4813a5 "git blame" no longer works as expected,
every line is annotated as "Not Committed Yet",
even though the working directory is clean.

commit 4d4813a5 removed the conversion in blame.c for all files,
with or without CRLF in the repo.

Having files with CRLF in the repo and core.autocrlf=input is a temporary
situation, the files should be normalized in the repo.
Blaming them with "Not Committed Yet" is OK.

The solution is to revert commit 4d4813a5.

Reported-By: Stepan Kasal <kasal@xxxxxx>
Signed-off-by: Torsten Bögershausen <tboegi@xxxxxx>
---
Changes since V3:
 more test cases
 Sorry for the spam

builtin/blame.c               |  1 +
 t/t8003-blame-corner-cases.sh | 48 +++++++++++++++++++++++++++++++++++++------
 2 files changed, 43 insertions(+), 6 deletions(-)

diff --git a/builtin/blame.c b/builtin/blame.c
index 06484c2..8d70623 100644
--- a/builtin/blame.c
+++ b/builtin/blame.c
@@ -2348,6 +2348,7 @@ static struct commit *fake_working_tree_commit(struct diff_options *opt,
 		if (strbuf_read(&buf, 0, 0) < 0)
 			die_errno("failed to read from stdin");
 	}
+	convert_to_git(path, buf.buf, buf.len, &buf, 0);
 	origin->file.ptr = buf.buf;
 	origin->file.size = buf.len;
 	pretend_sha1_file(buf.buf, buf.len, OBJ_BLOB, origin->blob_sha1);
diff --git a/t/t8003-blame-corner-cases.sh b/t/t8003-blame-corner-cases.sh
index 32895e5..8af36a6 100755
--- a/t/t8003-blame-corner-cases.sh
+++ b/t/t8003-blame-corner-cases.sh
@@ -191,13 +191,49 @@ test_expect_success 'indent of line numbers, ten lines' '
 	test $(grep -c "  " actual) = 9
 '
 
-test_expect_success 'blaming files with CRLF newlines' '
-	git config core.autocrlf false &&
+test_expect_success 'setup crlf files' '
 	printf "testcase\r\n" >crlffile &&
-	git add crlffile &&
-	git commit -m testcase &&
-	git -c core.autocrlf=input blame crlffile >actual &&
-	grep "A U Thor" actual
+	printf "testcase\n" >lffile &&
+	git -c core.autocrlf=false add lffile crlffile &&
+	git commit -m "add files" &&
+	git -c core.autocrlf=false blame HEAD -- crlffile >crlfclean.txt
+	printf "testcase\r\n" >crlffile &&
+	git -c core.autocrlf=false blame HEAD -- lffile >lfclean.txt
+	printf "testcase\r\n" >lffile
+	#Keep lffile with CRLF in worktree
+'
+
+test_expect_success 'blame file with CRLF in repo core.autocrlf=false' '
+	git -c core.autocrlf=false blame crlffile >crlf_repo_false &&
+	test_cmp crlfclean.txt crlf_repo_false
+'
+
+#has_cr_in_index() should suppress the normalization, see convert.c
+#but read_blob_data_from_cache() returns NULL
+test_expect_failure 'blame file with CRLF in repo core.autocrlf=true' '
+	git -c core.autocrlf=true blame crlffile >crlf_repo_true &&
+	test_cmp crlfclean.txt crlf_repo_true
+'
+
+test_expect_success 'blame file with CRLF in WS core.autocrlf=true' '
+	git -c core.autocrlf=true blame lffile >lf_repo_true &&
+	test_cmp lfclean.txt lf_repo_true
+'
+
+test_expect_success 'blame file with CRLF in WS core.autocrlf=input' '
+	git -c core.autocrlf=input blame lffile >lf_repo_input &&
+	test_cmp lfclean.txt lf_repo_input
+'
+
+test_expect_success 'blame file with CRLF in WS core.autocrlf=false' '
+	git -c core.autocrlf=false blame lffile >lf_repo_false &&
+	grep "Not Committed Yet" lf_repo_false
+'
+
+test_expect_success 'blame file with CRLF in WS core.autocrlf=false attributes' '
+	printf "lffile text\r\n" >.gitattributes &&
+	git -c core.autocrlf=false blame lffile >lf_repo_attr_text &&
+	test_cmp lfclean.txt lf_repo_attr_text
 '
 
 test_done
-- 
2.2.0.rc1.790.ge19fcd2

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