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add arc land hg support for landing with nested branches
Summary:
This changes arc land's hg support to allow you to land a branch or bookmark that has nested branches/bookmarks. Example:
// Initial state:
// -a--------b master
// \
// w--x mybranch
// \--y subbranch1
// \--z subbranch2
//
// arc land --branch mybranch --onto master :
// -a--b--wx master
// \--y subbranch1
// \--z subbranch2
Test Plan:
Created several repos like in the summary and ran 'arc land' and 'arc land --keep-branch'. Did this with both bookmarks and named branches. Scenarios tested:
- mybranch having no child commits
- mybranch having a child branch with several commits
- mybranch having two child branches
- mybranch having a child branch which has two more child branches
No code was added outside of a "if ($this->isHg)" so I didn't run git arc land.
Reviewers: epriestley, dschleimer, bos, sid0
Reviewed By: dschleimer
CC: aran, Korvin
Differential Revision: https://secure.phabricator.com/D4089
This commit is contained in:
durham
parent
2d7224f0e3
commit
f476d1a0c5
1 changed files with 143 additions and 17 deletions
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@ -499,14 +499,48 @@ EOTEXT
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$this->branch);
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$this->branch);
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}
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}
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else if ($this->isHg) {
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else if ($this->isHg) {
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// The hg code is a little more complex than git's because we
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// need to handle the case where the landing branch has child branches:
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// -a--------b master
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// \
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// w--x mybranch
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// \--y subbranch1
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// \--z subbranch2
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//
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// arc land --branch mybranch --onto master :
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// -a--b--wx master
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// \--y subbranch1
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// \--z subbranch2
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$branch_rev_id = $repository_api->getCanonicalRevisionName($this->branch);
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$branch_rev_id = $repository_api->getCanonicalRevisionName($this->branch);
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// At this point $this->onto has been pulled from remote and
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// $this->branch has been rebased on top of onto(by the rebase()
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// function). So we're guaranteed to have onto as an ancestor of branch
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// when we use first((onto::branch)-onto) below.
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$branch_root = $repository_api->getCanonicalRevisionName(
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sprintf("first((%s::%s)-%s)",
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$this->onto,
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$this->branch,
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$this->onto));
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$branch_range = sprintf(
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"(%s::%s)",
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$branch_root,
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$this->branch);
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if (!$this->keepBranch) {
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$this->handleAlternateBranches($branch_root, $branch_range);
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}
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// Collapse just the landing branch onto master.
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// Leave its children on the original branch.
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$repository_api->execxLocal(
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$repository_api->execxLocal(
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'rebase --collapse --logfile %s -b %s -d %s %s',
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'rebase --collapse --keep --logfile %s -r %s -d %s',
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$this->messageFile,
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$this->messageFile,
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$this->branch,
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$branch_range,
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$this->onto,
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$this->onto);
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$this->keepBranch ? '--keep' : '');
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if ($repository_api->isBookmark($this->branch)) {
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if ($repository_api->isBookmark($this->branch)) {
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// a bug in mercurial means bookmarks end up on the revision prior
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// a bug in mercurial means bookmarks end up on the revision prior
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// to the collapse when using --collapse with --keep,
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// to the collapse when using --collapse with --keep,
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@ -516,13 +550,113 @@ EOTEXT
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'bookmark -f %s',
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'bookmark -f %s',
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$this->onto);
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$this->onto);
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if ($this->keepBranch) {
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$repository_api->execxLocal(
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'bookmark -f %s -r %s',
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$this->branch,
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$branch_rev_id);
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}
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// check if the branch had children
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list($output) = $repository_api->execxLocal(
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"log -r %s --template '{node}\\n'",
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sprintf("children(%s)", $this->branch));
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$child_branch_roots = phutil_split_lines($output, false);
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$child_branch_roots = array_filter($child_branch_roots);
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if ($child_branch_roots) {
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// move the branch's children onto the collapsed commit
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foreach ($child_branch_roots as $child_root) {
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$repository_api->execxLocal(
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$repository_api->execxLocal(
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'bookmark -f %s -r %s',
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'rebase -d %s -s %s --keep --keepbranches',
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$this->branch,
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$this->onto,
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$branch_rev_id);
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$child_root);
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}
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}
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}
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}
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// delete the old branch if necessary
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if (!$this->keepBranch) {
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$repository_api->execxLocal(
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'strip -r %s',
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$branch_root);
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if ($repository_api->isBookmark($this->branch)) {
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$repository_api->execxLocal(
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'bookmark -d %s',
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$this->branch);
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}
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}
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// All the rebases may have moved us to another branch
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// so we move back.
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$repository_api->execxLocal('checkout %s', $this->onto);
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}
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}
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/**
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* Detect alternate branches and prompt the user for how to handle
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* them. An alternate branch is a branch that forks from the landing
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* branch prior to the landing branch tip.
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*
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* In a situation like this:
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* -a--------b master
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* \
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* w--x landingbranch
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* \ \-- g subbranch
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* \--y altbranch1
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* \--z altbranch2
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*
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* y and z are alternate branches and will get deleted by the squash,
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* so we need to detect them and ask the user what they want to do.
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*
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* @param string The revision id of the landing branch's root commit.
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* @param string The revset specifying all the commits in the landing branch.
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* @return void
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*/
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private function handleAlternateBranches($branch_root, $branch_range) {
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$repository_api = $this->getRepositoryAPI();
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// Using the tree in the doccomment, the revset below resolves as follows:
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// 1. roots(descendants(w) - descendants(x) - (w::x))
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// 2. roots({x,g,y,z} - {g} - {w,x})
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// 3. roots({y,z})
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// 4. {y,z}
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$alt_branch_revset = sprintf(
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'roots(descendants(%s)-descendants(%s)-%s)',
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$branch_root,
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$this->branch,
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$branch_range);
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list($alt_branches) = $repository_api->execxLocal(
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"log --template '{node}\n' -r %s",
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$alt_branch_revset);
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$alt_branches = phutil_split_lines($alt_branches, false);
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$alt_branches = array_filter($alt_branches);
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$alt_count = count($alt_branches);
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if ($alt_count > 0) {
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$input = phutil_console_prompt(
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"Branch {$this->branch} has {$alt_count} branch(s) forking off of it ".
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"that would be deleted during a squash. Would you like to keep a ".
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"non-squashed copy, rebase them on top of {$this->branch}, or abort ".
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"and deal with them yourself? (k)eep, (r)ebase, (a)bort:");
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if ($input == 'k' || $input == 'keep') {
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$this->keepBranch = true;
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} else if ($input == 'r' || $input == 'rebase') {
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foreach ($alt_branches as $alt_branch) {
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$repository_api->execxLocal(
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'rebase --keep --keepbranches -d %s -s %s',
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$this->branch,
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$alt_branch);
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}
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} else if ($input == 'a' || $input == 'abort') {
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$branch_string = implode("\n", $alt_branches);
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echo "\nRemove the branches starting at these revision and ".
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"run arc land again:\n{$branch_string}\n\n";
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throw new ArcanistUserAbortException();
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} else {
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throw new ArcanistUsageException("Invalid choice. Aborting arc land.");
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}
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}
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}
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}
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}
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@ -636,15 +770,7 @@ EOTEXT
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'branch -D %s',
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'branch -D %s',
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$this->branch);
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$this->branch);
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}
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}
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else if ($this->isHg) {
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// hg branches/bookmarks were closed earlier
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// named branches were closed as part of the earlier commit
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// so only worry about bookmarks
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if ($repository_api->isBookmark($this->branch)) {
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$repository_api->execxLocal(
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'bookmark -d %s',
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$this->branch);
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}
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}
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if ($this->getArgument('delete-remote')) {
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if ($this->getArgument('delete-remote')) {
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if ($this->isGit) {
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if ($this->isGit) {
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