From 3d170b096eee92037c65215896a42bf67f2872cd Mon Sep 17 00:00:00 2001 From: Matt R Date: Thu, 29 Aug 2019 18:32:19 -0400 Subject: [PATCH] rebase -r: let `label` generate safer labels MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The `label` todo command in interactive rebases creates temporary refs in the `refs/rewritten/` namespace. These refs are stored as loose refs, i.e. as files in `.git/refs/rewritten/`, therefore they have to conform with file name limitations on the current filesystem. This poses a problem in particular on NTFS/FAT, where e.g. the colon character is not a valid part of a file name. Let's safeguard against this by replacing not only white-space characters by dashes, but all non-alpha-numeric ones. However, we exempt non-ASCII UTF-8 characters from that, as it should be quite possible to reflect branch names such as `↯↯↯` in refs/file names. Signed-off-by: Matthew Rogers Signed-off-by: Johannes Schindelin --- sequencer.c | 12 +++++++++++- t/t3430-rebase-merges.sh | 6 ++++++ 2 files changed, 17 insertions(+), 1 deletion(-) diff --git a/sequencer.c b/sequencer.c index 9d5964fd81..4960a26ac3 100644 --- a/sequencer.c +++ b/sequencer.c @@ -4598,8 +4598,18 @@ static int make_script_with_merges(struct pretty_print_context *pp, else strbuf_addbuf(&label, &oneline); + /* + * Sanitize labels by replacing non-alpha-numeric characters + * (including white-space ones) by dashes, as they might be + * illegal in file names (and hence in ref names). + * + * Note that we retain non-ASCII UTF-8 characters (identified + * via the most significant bit). They should be all acceptable + * in file names. We do not validate the UTF-8 here, that's not + * the job of this function. + */ for (p1 = label.buf; *p1; p1++) - if (isspace(*p1)) + if (!(*p1 & 0x80) && !isalnum(*p1)) *(char *)p1 = '-'; strbuf_reset(&buf); diff --git a/t/t3430-rebase-merges.sh b/t/t3430-rebase-merges.sh index 9efcf4808a..f728aba995 100755 --- a/t/t3430-rebase-merges.sh +++ b/t/t3430-rebase-merges.sh @@ -468,4 +468,10 @@ test_expect_success '--rebase-merges with strategies' ' test_cmp expect G.t ' +test_expect_success '--rebase-merges with commit that can generate bad characters for filename' ' + git checkout -b colon-in-label E && + git merge -m "colon: this should work" G && + git rebase --rebase-merges --force-rebase E +' + test_done