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When saving and restoring local state in Mercurial, also save and restore bookmarks
Summary: Ref PHI1808. In Mercurial, we must save and restore bookmark state explicitly. - Save and restore bookmarks. - Clean up concepts in "arc-ls-markers" slightly, so we don't need separate "isCurrent" and "isActive" flags, hopefully. I believe the totality of Mercurial state is: - A (non-bare) working copy points at exactly one commit (which might be the empty/null commit, in an empty repository). - A working copy has exactly one active branch. - Each branch has zero or more heads. - Each head may be closed. - Each (non-null) commit belongs to exactly one branch. - Note that the active branch may have zero heads and zero commits which belong to it! - A working copy has zero or one active bookmark. To capture this, we now emit: - A list of branch heads. If a branch head is a working copy commit, that head is flagged as active. - A list of bookmarks. If a bookmark is the current bookmark, that bookmark is flagged as active. - A single "branch-state" virtual marker. This covers the case where you have run "hg branch X" to create X, but no objects in the working copy actually correspond to X yet. It also covers the case where you are on a concrete branch, but not any head of that branch. - A single "commit-state" virtual marker. This always shows the current commit in the working copy. Test Plan: - Useful states to test are: - Empty repository (not all commands currently work here). - Normal repository, on a bookmark. - Normal repository, no bookmark. - "hg up 123" to update to somewhere in history. - "hg branch X", to start a new branch with no commits. - Ran "arc branches" and "arc bookmarks" in various states. Saw generally sensible output. - Ran "arc land --hold ..." in various states against a failing remote. Saw generally sensible output, and saw working properly restored to the original state. Differential Revision: https://secure.phabricator.com/D21396
This commit is contained in:
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3633364bb9
commit
354da1ddaa
4 changed files with 134 additions and 68 deletions
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@ -9,6 +9,8 @@ final class ArcanistMarkerRef
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const TYPE_BRANCH = 'branch';
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const TYPE_BOOKMARK = 'bookmark';
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const TYPE_COMMIT_STATE = 'commit-state';
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const TYPE_BRANCH_STATE = 'branch-state';
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private $name;
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private $markerType;
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@ -148,6 +150,14 @@ final class ArcanistMarkerRef
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return ($this->getMarkerType() === self::TYPE_BRANCH);
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}
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public function isCommitState() {
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return ($this->getMarkerType() === self::TYPE_COMMIT_STATE);
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}
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public function isBranchState() {
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return ($this->getMarkerType() === self::TYPE_BRANCH_STATE);
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}
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public function attachCommitRef(ArcanistCommitRef $ref) {
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return $this->attachHardpoint(self::HARDPOINT_COMMITREF, $ref);
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}
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@ -71,10 +71,6 @@ final class ArcanistMercurialRepositoryMarkerQuery
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}
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$node = $item['node'];
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if (!$node) {
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// NOTE: For now, we ignore the virtual "current branch" marker.
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continue;
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}
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switch ($item['type']) {
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case 'branch':
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@ -83,8 +79,11 @@ final class ArcanistMercurialRepositoryMarkerQuery
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case 'bookmark':
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$marker_type = ArcanistMarkerRef::TYPE_BOOKMARK;
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break;
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case 'commit':
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$marker_type = null;
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case 'commit-state':
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$marker_type = ArcanistMarkerRef::TYPE_COMMIT_STATE;
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break;
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case 'branch-state':
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$marker_type = ArcanistMarkerRef::TYPE_BRANCH_STATE;
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break;
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default:
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throw new Exception(
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@ -94,11 +93,6 @@ final class ArcanistMercurialRepositoryMarkerQuery
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$item['type']));
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}
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if ($marker_type === null) {
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// NOTE: For now, we ignore the virtual "head" marker.
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continue;
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}
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$commit_ref = $api->newCommitRef()
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->setCommitHash($node);
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@ -5,40 +5,105 @@ final class ArcanistMercurialLocalState
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private $localCommit;
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private $localBranch;
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private $localBookmark;
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protected function executeSaveLocalState() {
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$api = $this->getRepositoryAPI();
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$log = $this->getWorkflow()->getLogEngine();
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// TODO: Both of these can be pulled from "hg arc-ls-markers" more
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// efficiently.
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$markers = $api->newMarkerRefQuery()
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->execute();
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$this->localCommit = $api->getCanonicalRevisionName('.');
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$local_commit = null;
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foreach ($markers as $marker) {
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if ($marker->isCommitState()) {
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$local_commit = $marker->getCommitHash();
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}
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}
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list($branch) = $api->execxLocal('branch');
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$this->localBranch = trim($branch);
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if ($local_commit === null) {
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throw new Exception(
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pht(
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'Unable to identify the current commit in the working copy.'));
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}
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$log->writeTrace(
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pht('SAVE STATE'),
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pht(
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$this->localCommit = $local_commit;
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$local_branch = null;
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foreach ($markers as $marker) {
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if ($marker->isBranchState()) {
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$local_branch = $marker->getName();
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break;
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}
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}
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if ($local_branch === null) {
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throw new Exception(
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pht(
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'Unable to identify the current branch in the working copy.'));
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}
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if ($local_branch !== null) {
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$this->localBranch = $local_branch;
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}
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$local_bookmark = null;
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foreach ($markers as $marker) {
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if ($marker->isBookmark()) {
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if ($marker->getIsActive()) {
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$local_bookmark = $marker->getName();
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break;
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}
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}
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}
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if ($local_bookmark !== null) {
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$this->localBookmark = $local_bookmark;
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}
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$has_bookmark = ($this->localBookmark !== null);
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if ($has_bookmark) {
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$location = pht(
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'Saving local state (at "%s" on branch "%s", bookmarked as "%s").',
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$api->getDisplayHash($this->localCommit),
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$this->localBranch,
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$this->localBookmark);
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} else {
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$location = pht(
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'Saving local state (at "%s" on branch "%s").',
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$api->getDisplayHash($this->localCommit),
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$this->localBranch));
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$this->localBranch);
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}
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$log->writeTrace(pht('SAVE STATE'), $location);
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}
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protected function executeRestoreLocalState() {
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$api = $this->getRepositoryAPI();
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$log = $this->getWorkflow()->getLogEngine();
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$log->writeStatus(
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pht('LOAD STATE'),
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pht(
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if ($this->localBookmark !== null) {
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$location = pht(
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'Restoring local state (at "%s" on branch "%s", bookmarked as "%s").',
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$api->getDisplayHash($this->localCommit),
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$this->localBranch,
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$this->localBookmark);
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} else {
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$location = pht(
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'Restoring local state (at "%s" on branch "%s").',
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$api->getDisplayHash($this->localCommit),
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$this->localBranch));
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$this->localBranch);
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}
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$log->writeStatus(pht('LOAD STATE'), $location);
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$api->execxLocal('update -- %s', $this->localCommit);
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$api->execxLocal('branch --force -- %s', $this->localBranch);
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if ($this->localBookmark !== null) {
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$api->execxLocal('bookmark --force -- %s', $this->localBookmark);
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}
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}
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protected function executeDiscardLocalState() {
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@ -70,6 +135,12 @@ final class ArcanistMercurialLocalState
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'hg branch --force -- %s',
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$this->localBranch);
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if ($this->localBookmark !== null) {
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$commands[] = csprintf(
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'hg bookmark --force -- %s',
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$this->localBookmark);
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}
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return $commands;
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}
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@ -85,21 +85,17 @@ def localmarkers(ui, repo):
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active_node = repo[b'.'].node()
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all_heads = set(repo.heads())
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current_name = repo.dirstate.branch()
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saw_current = False
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saw_active = False
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branch_list = repo.branchmap().iterbranches()
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for branch_name, branch_heads, tip_node, is_closed in branch_list:
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for head_node in branch_heads:
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is_active = (head_node == active_node)
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is_active = False
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if branch_name == current_name:
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if head_node == active_node:
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is_active = True
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is_tip = (head_node == tip_node)
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is_current = (branch_name == current_name)
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if is_current:
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saw_current = True
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if is_active:
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saw_active = True
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if is_closed:
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head_closed = True
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@ -115,26 +111,9 @@ def localmarkers(ui, repo):
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'isActive': is_active,
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'isClosed': head_closed,
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'isTip': is_tip,
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'isCurrent': is_current,
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'description': description,
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})
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# If the current branch (selected with "hg branch X") is not reflected in
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# the list of heads we selected, add a virtual head for it so callers get
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# a complete picture of repository marker state.
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if not saw_current:
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markers.append({
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'type': 'branch',
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'name': current_name,
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'node': None,
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'isActive': False,
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'isClosed': False,
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'isTip': False,
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'isCurrent': True,
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'description': None,
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})
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bookmarks = repo._bookmarks
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active_bookmark = repo._activebookmark
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@ -142,9 +121,6 @@ def localmarkers(ui, repo):
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is_active = (active_bookmark == bookmark_name)
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description = repo[bookmark_node].description()
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if is_active:
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saw_active = True
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markers.append({
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'type': 'bookmark',
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'name': bookmark_name,
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@ -153,21 +129,36 @@ def localmarkers(ui, repo):
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'description': description,
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})
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# If the current working copy state is not the head of a branch and there is
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# also no active bookmark, add a virtual marker for it so callers can figure
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# out exactly where we are.
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# Add virtual markers for the current commit state and current branch state
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# so callers can figure out exactly where we are.
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if not saw_active:
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markers.append({
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'type': 'commit',
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'name': None,
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'node': node.hex(active_node),
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'isActive': False,
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'isClosed': False,
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'isTip': False,
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'isCurrent': True,
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'description': repo[b'.'].description(),
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})
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# Common cases where this matters include:
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# You run "hg update 123" to update to an older revision. Your working
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# copy commit will not be a branch head or a bookmark.
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# You run "hg branch X" to create a new branch, but have not made any commits
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# yet. Your working copy branch will not be reflected in any commits.
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markers.append({
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'type': 'branch-state',
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'name': current_name,
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'node': None,
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'isActive': True,
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'isClosed': False,
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'isTip': False,
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'description': None,
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})
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markers.append({
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'type': 'commit-state',
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'name': None,
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'node': node.hex(active_node),
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'isActive': True,
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'isClosed': False,
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'isTip': False,
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'description': repo[b'.'].description(),
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})
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return markers
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