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fix: reset branches to handle squash merge

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This commit is contained in:
Peter Evans 2020-09-06 08:55:29 +09:00
parent 5ea31358e9
commit 16fa12ee5f
3 changed files with 164 additions and 6 deletions
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15
src/create-or-update-branch.ts
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@ -196,9 +196,18 @@ export async function createOrUpdateBranch(
// Checkout the pull request branch
await git.checkout(branch)
if (await hasDiff(git, branch, tempBranch)) {
// If the branch differs from the recreated temp version then the branch is reset
// For changes on base this action is similar to a rebase of the pull request branch
// Reset the branch if one of the following conditions is true.
// - If the branch differs from the recreated temp branch.
// - If the recreated temp branch is not ahead of the base. This means there will be
// no pull request diff after the branch is reset. This will reset any undeleted
// branches after merging. In particular, it catches a case where the branch was
// squash merged but not deleted. We need to reset to make sure it doesn't appear
// to have a diff with the base due to different commits for the same changes.
// For changes on base this reset is equivalent to a rebase of the pull request branch.
if (
(await hasDiff(git, branch, tempBranch)) ||
!(await isAhead(git, base, tempBranch))
) {
core.info(`Resetting '${branch}'`)
// Alternatively, git switch -C branch tempBranch
await git.checkout(branch, tempBranch)