convert: add SAFE_CRLF_KEEP_CRLF

When convert_to_git() is called, the caller may want to keep CRLF to
be kept as CRLF (and not converted into LF).

This will be used in the next commit, when apply works with files
that have CRLF and patches are applied onto these files.

Add the new value "SAFE_CRLF_KEEP_CRLF" to safe_crlf.

Prepare convert_to_git() to be able to run the clean filter, skip
the CRLF conversion and run the ident filter.

Signed-off-by: Torsten Bögershausen <tboegi@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

2 files changed, 8 insertions, 5 deletions

diff --git a/convert.c b/convert.c
index deaf0ba7b3..040123b4fe 100644
--- a/convert.c
+++ b/convert.c
@@ -1104,10 +1104,12 @@ int convert_to_git(const struct index_state *istate,
 		src = dst->buf;
 		len = dst->len;
 	}
-	ret |= crlf_to_git(istate, path, src, len, dst, ca.crlf_action, checksafe);
-	if (ret && dst) {
-		src = dst->buf;
-		len = dst->len;
+	if (checksafe != SAFE_CRLF_KEEP_CRLF) {
+		ret |= crlf_to_git(istate, path, src, len, dst, ca.crlf_action, checksafe);
+		if (ret && dst) {
+			src = dst->buf;
+			len = dst->len;
+		}
 	}
 	return ret | ident_to_git(path, src, len, dst, ca.ident);
 }
diff --git a/convert.h b/convert.h
index cecf59d1aa..cabd5ed6dd 100644
--- a/convert.h
+++ b/convert.h
@@ -10,7 +10,8 @@ enum safe_crlf {
 	SAFE_CRLF_FALSE = 0,
 	SAFE_CRLF_FAIL = 1,
 	SAFE_CRLF_WARN = 2,
-	SAFE_CRLF_RENORMALIZE = 3
+	SAFE_CRLF_RENORMALIZE = 3,
+	SAFE_CRLF_KEEP_CRLF = 4
 };
 
 extern enum safe_crlf safe_crlf;