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fast-export: avoid stripping encoding header if we cannot reencode

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When fast-export encounters a commit with an 'encoding' header, it tries
to reencode in UTF-8 and then drops the encoding header.  However, if it
fails to reencode in UTF-8 because e.g. one of the characters in the
commit message was invalid in the old encoding, then we need to retain
the original encoding or otherwise we lose information needed to
understand all the other (valid) characters in the original commit
message.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Elijah Newren
2019-05-13 21:31:00 -07:00
committed by Junio C Hamano
parent 3edfcc65fd
commit ccbfc96dc4
3 changed files with 27 additions and 2 deletions
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7
builtin/fast-export.c
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@ -642,9 +642,12 @@ static void handle_commit(struct commit *commit, struct rev_info *rev,
printf("commit %s\nmark :%"PRIu32"\n", refname, last_idnum);
if (show_original_ids)
printf("original-oid %s\n", oid_to_hex(&commit->object.oid));
printf("%.*s\n%.*s\ndata %u\n%s",
printf("%.*s\n%.*s\n",
(int)(author_end - author), author,
(int)(committer_end - committer), committer,
(int)(committer_end - committer), committer);
if (!reencoded && encoding)
printf("encoding %s\n", encoding);
printf("data %u\n%s",
(unsigned)(reencoded
? strlen(reencoded) : message
? strlen(message) : 0),