From: Paolo Bonzini <pbonzini@xxxxxxxxxx>
In some cases, git request-pull might be invoked with remote and
local objects that differ even though they point to the same commit.
For example, the remote object might be a lightweight tag
vs. an annotated tag on the local side; or the user might have
reworded the tag locally and forgotten to push it.
When this happens git-request-pull will not warn, because it only
checks that "git ls-remote" returns an SHA1 that matches the local
commit (known as $headrev in the script). This patch makes
git-request-pull retrieve the tag object SHA1 while processing
the "git ls-remote" output, so that it can be matched against the
local object.
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
---
git-request-pull.sh | 43 +++++++++++++++++++++++++++--------------
t/t5150-request-pull.sh | 35 +++++++++++++++++++++++++++++++++
2 files changed, 63 insertions(+), 15 deletions(-)
diff --git a/git-request-pull.sh b/git-request-pull.sh
index 0d128be7fd..2d0e44656c 100755
--- a/git-request-pull.sh
+++ b/git-request-pull.sh
@@ -65,6 +65,8 @@ test -z "$head" && die "fatal: Not a valid revision: $local"
headrev=$(git rev-parse --verify --quiet "$head"^0)
test -z "$headrev" && die "fatal: Ambiguous revision: $local"
+local_sha1=$(git rev-parse --verify --quiet "$head")
+
# Was it a branch with a description?
branch_name=${head#refs/heads/}
if test "z$branch_name" = "z$headref" ||
@@ -77,42 +79,53 @@ merge_base=$(git merge-base $baserev $headrev) ||
die "fatal: No commits in common between $base and $head"
# $head is the refname from the command line.
-# If a ref with the same name as $head exists at the remote
-# and their values match, use that.
-#
-# Otherwise find a random ref that matches $headrev.
+# Find a ref with the same name as $head that exists at the remote
+# and points to the same commit as the local object.
find_matching_ref='
my ($head,$headrev) = (@ARGV);
my $pattern = qr{/\Q$head\E$};
- my ($found);
+ my ($remote_sha1, $found);
while (<STDIN>) {
chomp;
my ($sha1, $ref, $deref) = /^(\S+)\s+([^^]+)(\S*)$/;
- next unless ($sha1 eq $headrev);
- if ($ref eq $head) {
- $found = $ref;
- }
- if ($ref =~ $pattern) {
- $found = $ref;
- }
if ($sha1 eq $head) {
- $found = $sha1;
+ $found = $remote_sha1 = $sha1;
+ break;
+ }
+
+ if ($ref eq $head || $ref =~ $pattern) {
+ if ($deref eq "") {
+ # Remember the matching object on the remote side
+ $remote_sha1 = $sha1;
+ }
+ if ($sha1 eq $headrev) {
+ $found = $ref;
+ break;
+ }
}
}
if ($found) {
- print "$found\n";
+ $remote_sha1 = $headrev if ! defined $remote_sha1;
+ print "$remote_sha1 $found\n";
}
'
-ref=$(git ls-remote "$url" | @@PERL@@ -e "$find_matching_ref" "${remote:-HEAD}" "$headrev")
+set fnord $(git ls-remote "$url" | @@PERL@@ -e "$find_matching_ref" "${remote:-HEAD}" "$headrev")
+remote_sha1=$2
+ref=$3
if test -z "$ref"
then
echo "warn: No match for commit $headrev found at $url" >&2
echo "warn: Are you sure you pushed '${remote:-HEAD}' there?" >&2
status=1
+elif test "$local_sha1" != "$remote_sha1"
+then
+ echo "warn: $head found at $url but points to a different object" >&2
+ echo "warn: Are you sure you pushed '${remote:-HEAD}' there?" >&2
+ status=1
fi
# Special case: turn "for_linus" to "tags/for_linus" when it is correct
diff --git a/t/t5150-request-pull.sh b/t/t5150-request-pull.sh
index c1a821a549..852dcd913f 100755
--- a/t/t5150-request-pull.sh
+++ b/t/t5150-request-pull.sh
@@ -264,4 +264,39 @@ test_expect_success 'request-pull quotes regex metacharacters properly' '
'
+test_expect_success 'pull request with mismatched object' '
+
+ rm -fr downstream.git &&
+ git init --bare downstream.git &&
+ (
+ cd local &&
+ git checkout initial &&
+ git merge --ff-only master &&
+ git push origin HEAD:refs/tags/full &&
+ test_must_fail git request-pull initial "$downstream_url" tags/full \
+ 2>../err
+ ) &&
+ grep "points to a different object" err &&
+ grep "Are you sure you pushed" err
+
+'
+
+test_expect_success 'pull request with stale object' '
+
+ rm -fr downstream.git &&
+ git init --bare downstream.git &&
+ (
+ cd local &&
+ git checkout initial &&
+ git merge --ff-only master &&
+ git push origin refs/tags/full &&
+ git tag -f -m"Thirty-one days" full &&
+ test_must_fail git request-pull initial "$downstream_url" tags/full \
+ 2>../err
+ ) &&
+ grep "points to a different object" err &&
+ grep "Are you sure you pushed" err
+
+'
+
test_done
--
2.21.0
