From 79f43447d2b542d1e521987287822ff376d43e93 Mon Sep 17 00:00:00 2001 From: Ben Woosley Date: Wed, 20 Apr 2016 18:20:56 +0000 Subject: [PATCH] git-rebase--merge: don't include absent parent as a base Absent this fix, attempts to rebase an orphan branch using "rebase -m" fails with: $ git rebase -m ORPHAN_TARGET_BASE First, rewinding head to replay your work on top of it... fatal: Could not parse object 'ORPHAN_ROOT_SHA^' Unknown exit code (128) from command: git-merge-recursive ORPHAN_ROOT_SHA^ -- HEAD ORPHAN_ROOT_SHA To fix, this will only include the rebase root's parent as a base if it exists, so that in cases of rebasing an orphan branch, it is a simple two-way merge. Note the default rebase behavior does not fail: $ git rebase ORPHAN_TARGET_BASE First, rewinding head to replay your work on top of it... Applying: ORPHAN_ROOT_COMMIT_MSG Using index info to reconstruct a base tree... A few tests were expecting the old behaviour to forbid rebasing such a history with "rebase -m", which now need to expect them to succeed. Signed-off-by: Ben Woosley Signed-off-by: Junio C Hamano --- git-rebase--merge.sh | 4 +++- t/t3402-rebase-merge.sh | 9 +++++++++ t/t3421-rebase-topology-linear.sh | 4 ++-- 3 files changed, 14 insertions(+), 3 deletions(-) diff --git a/git-rebase--merge.sh b/git-rebase--merge.sh index 2cc2a6d273..8d43db9069 100644 --- a/git-rebase--merge.sh +++ b/git-rebase--merge.sh @@ -67,7 +67,9 @@ call_merge () { GIT_MERGE_VERBOSITY=1 && export GIT_MERGE_VERBOSITY fi test -z "$strategy" && strategy=recursive - eval 'git-merge-$strategy' $strategy_opts '"$cmt^" -- "$hd" "$cmt"' + # If cmt doesn't have a parent, don't include it as a base + base=$(git rev-parse --verify --quiet $cmt^) + eval 'git-merge-$strategy' $strategy_opts $base ' -- "$hd" "$cmt"' rv=$? case "$rv" in 0) diff --git a/t/t3402-rebase-merge.sh b/t/t3402-rebase-merge.sh index 8f64505e4f..488945e007 100755 --- a/t/t3402-rebase-merge.sh +++ b/t/t3402-rebase-merge.sh @@ -85,6 +85,15 @@ test_expect_success 'rebase -Xtheirs' ' ! grep 11 original ' +test_expect_success 'rebase -Xtheirs from orphan' ' + git checkout --orphan orphan-conflicting master~2 && + echo "AB $T" >> original && + git commit -morphan-conflicting original && + git rebase -Xtheirs master && + grep AB original && + ! grep 11 original +' + test_expect_success 'merge and rebase should match' ' git diff-tree -r test-rebase test-merge >difference && if test -s difference diff --git a/t/t3421-rebase-topology-linear.sh b/t/t3421-rebase-topology-linear.sh index 9c55cba198..68fe2003ef 100755 --- a/t/t3421-rebase-topology-linear.sh +++ b/t/t3421-rebase-topology-linear.sh @@ -253,7 +253,7 @@ test_run_rebase () { " } test_run_rebase success '' -test_run_rebase failure -m +test_run_rebase success -m test_run_rebase success -i test_run_rebase success -p @@ -268,7 +268,7 @@ test_run_rebase () { " } test_run_rebase success '' -test_run_rebase failure -m +test_run_rebase success -m test_run_rebase success -i test_run_rebase failure -p