From b6160d950c9ef168d0f7d7c9b2812f280e5b88fb Mon Sep 17 00:00:00 2001 From: Raphael Kubo da Costa Date: Mon, 5 Jan 2015 11:58:55 +0200 Subject: for-each-ref: always check stat_tracking_info()'s return value The code handling %(upstream:track) and %(upstream:trackshort) assumed that it always had a valid branch that had been sanitized earlier in populate_value(), and thus did not check the return value of the call to stat_tracking_info(). While there is indeed some sanitization code that basically corresponds to stat_tracking_info() returning 0 (no base branch set), the function can also return -1 when the base branch did exist but has since then been deleted. In this case, num_ours and num_theirs had undefined values and a call to `git for-each-ref --format="%(upstream:track)"` could print spurious values such as [behind -111794512] [ahead 38881640, behind 5103867] even for repositories with one single commit. Verify stat_tracking_info()'s return value and do not print anything if it returns -1. This behavior also matches the documentation ("has no effect if the ref does not have tracking information associated with it"). Helped-by: Eric Sunshine Helped-by: Jeff King Signed-off-by: Raphael Kubo da Costa Signed-off-by: Junio C Hamano --- builtin/for-each-ref.c | 11 +++++++++-- t/t6300-for-each-ref.sh | 13 +++++++++++++ 2 files changed, 22 insertions(+), 2 deletions(-) diff --git a/builtin/for-each-ref.c b/builtin/for-each-ref.c index 3e1d5c3334..edf9c3c744 100644 --- a/builtin/for-each-ref.c +++ b/builtin/for-each-ref.c @@ -728,7 +728,10 @@ static void populate_value(struct refinfo *ref) starts_with(name, "upstream")) { char buf[40]; - stat_tracking_info(branch, &num_ours, &num_theirs); + if (stat_tracking_info(branch, &num_ours, + &num_theirs) != 1) + continue; + if (!num_ours && !num_theirs) v->s = ""; else if (!num_ours) { @@ -746,7 +749,11 @@ static void populate_value(struct refinfo *ref) } else if (!strcmp(formatp, "trackshort") && starts_with(name, "upstream")) { assert(branch); - stat_tracking_info(branch, &num_ours, &num_theirs); + + if (stat_tracking_info(branch, &num_ours, + &num_theirs) != 1) + continue; + if (!num_ours && !num_theirs) v->s = "="; else if (!num_ours) diff --git a/t/t6300-for-each-ref.sh b/t/t6300-for-each-ref.sh index bda354c1c4..c66bf7981c 100755 --- a/t/t6300-for-each-ref.sh +++ b/t/t6300-for-each-ref.sh @@ -334,6 +334,19 @@ test_expect_success 'Check that :track[short] cannot be used with other atoms' ' test_must_fail git for-each-ref --format="%(refname:trackshort)" 2>/dev/null ' +test_expect_success 'Check that :track[short] works when upstream is invalid' ' + cat >expected <<-\EOF && + + + EOF + test_when_finished "git config branch.master.merge refs/heads/master" && + git config branch.master.merge refs/heads/does-not-exist && + git for-each-ref \ + --format="%(upstream:track)$LF%(upstream:trackshort)" \ + refs/heads >actual && + test_cmp expected actual +' + cat >expected <