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Improve the logic for identifying ambiguous commits and applying "--revision" to them
Summary: Ref T13546. This is mostly minor cleanup that improves behavior under "--revision". Test Plan: Ran `arc land --into-empty` and `arc land --into-empty --revision 123` with ambiguous revisions in history to hit both the force and non-force outcomes. Maniphest Tasks: T13546 Differential Revision: https://secure.phabricator.com/D21325
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8a53b5a451
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2 changed files with 132 additions and 79 deletions
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@ -12,6 +12,7 @@ final class ArcanistLandCommit
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private $parentCommits;
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private $isHeadCommit;
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private $isImplicitCommit;
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private $relatedRevisionRefs = array();
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private $directSymbols = array();
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private $indirectSymbols = array();
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@ -156,5 +157,14 @@ final class ArcanistLandCommit
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return null;
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}
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public function setRelatedRevisionRefs(array $refs) {
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assert_instances_of($refs, 'ArcanistRevisionRef');
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$this->relatedRevisionRefs = $refs;
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return $this;
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}
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public function getRelatedRevisionRefs() {
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return $this->relatedRevisionRefs;
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}
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}
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@ -835,96 +835,76 @@ abstract class ArcanistLandEngine extends Phobject {
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foreach ($commit_map as $commit) {
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$hash = $commit->getHash();
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$state_ref = $state_refs[$hash];
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$revision_refs = $state_ref->getRevisionRefs();
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// If we have several possible revisions but one of them matches the
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// "--revision" argument, just select it. This is relatively safe and
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// reasonable and doesn't need a warning.
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if ($force_ref) {
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if (count($revision_refs) > 1) {
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foreach ($revision_refs as $revision_ref) {
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if ($revision_ref->getPHID() === $force_ref->getPHID()) {
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$revision_refs = array($revision_ref);
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break;
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}
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}
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}
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}
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if (count($revision_refs) === 1) {
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$revision_ref = head($revision_refs);
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$commit->setExplicitRevisionRef($revision_ref);
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continue;
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}
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if (!$revision_refs) {
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continue;
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}
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// TODO: If we have several refs but all but one are abandoned or closed
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// or authored by someone else, we could guess what you mean.
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$symbols = $commit->getIndirectSymbols();
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$raw_symbols = mpull($symbols, 'getSymbol');
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$symbol_list = implode(', ', $raw_symbols);
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$display_hash = $this->getDisplayHash($hash);
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// TODO: Include "use 'arc look --type commit abc' to figure out why"
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// once that works?
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echo tsprintf(
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"\n%!\n%W\n\n",
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pht('AMBIGUOUS REVISION'),
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pht(
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'The revision associated with commit "%s" (an ancestor of: %s) '.
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'is ambiguous. These %s revision(s) are associated with the commit:',
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$display_hash,
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implode(', ', $raw_symbols),
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phutil_count($revision_refs)));
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foreach ($revision_refs as $revision_ref) {
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echo tsprintf(
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'%s',
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$revision_ref->newDisplayRef());
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}
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echo tsprintf("\n");
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throw new PhutilArgumentUsageException(
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pht(
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'Revision for commit "%s" is ambiguous. Use "--revision" to force '.
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'selection of a particular revision.',
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$display_hash));
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$commit->setRelatedRevisionRefs($revision_refs);
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}
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if ($force_ref) {
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$phid_map = array();
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foreach ($commit_map as $commit) {
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$explicit_ref = $commit->getExplicitRevisionRef();
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if ($explicit_ref) {
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$revision_phid = $explicit_ref->getPHID();
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$phid_map[$revision_phid] = $revision_phid;
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}
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// For commits which have exactly one related revision, select it now.
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foreach ($commit_map as $commit) {
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$revision_refs = $commit->getRelatedRevisionRefs();
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if (count($revision_refs) !== 1) {
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continue;
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}
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$revision_ref = head($revision_refs);
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$commit->setExplicitRevisionRef($revision_ref);
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}
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// If we have a "--revision", select that revision for any commits with
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// no known related revisions.
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// Also select that revision for any commits which have several possible
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// revisions including that revision. This is relatively safe and
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// reasonable and doesn't require a warning.
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if ($force_ref) {
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$force_phid = $force_ref->getPHID();
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foreach ($commit_map as $commit) {
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if ($commit->getExplicitRevisionRef()) {
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continue;
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}
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$revision_refs = $commit->getRelatedRevisionRefs();
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if ($revision_refs) {
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$revision_refs = mpull($revision_refs, null, 'getPHID');
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if (!isset($revision_refs[$force_phid])) {
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continue;
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}
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}
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$commit->setExplicitRevisionRef($force_ref);
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}
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}
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// If we have a "--revision", identify any commits which it is not yet
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// selected for. These are commits which are not associated with the
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// identified revision but are associated with one or more other revisions.
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if ($force_ref) {
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$force_phid = $force_ref->getPHID();
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// If none of the commits have a revision, forcing the revision is
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// reasonable and we don't need to confirm it.
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$confirm_force = array();
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foreach ($commit_map as $key => $commit) {
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$revision_ref = $commit->getExplicitRevisionRef();
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// If some of the commits have a revision, but it's the same as the
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// revision we're forcing, forcing the revision is also reasonable.
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if (!$revision_ref) {
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continue;
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}
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// Discard the revision we're trying to force, then check if there's
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// anything left. If some of the commits have a different revision,
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// make sure the user is really doing what they expect.
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if ($revision_ref->getPHID() === $force_phid) {
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continue;
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}
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unset($phid_map[$force_phid]);
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$confirm_force[] = $commit;
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}
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if ($confirm_force) {
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if ($phid_map) {
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// TODO: Make this more clear.
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// TODO: Show all the commits.
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throw new PhutilArgumentUsageException(
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pht(
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@ -933,10 +913,73 @@ abstract class ArcanistLandEngine extends Phobject {
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'ALL these commits wiht a different unrelated revision???'));
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}
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foreach ($commit_map as $commit) {
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foreach ($confirm_force as $commit) {
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$commit->setExplicitRevisionRef($force_ref);
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}
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}
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// Finally, raise an error if we're left with ambiguous revisions. This
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// happens when we have no "--revision" and some commits in the range
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// that are associated with more than one revision.
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$ambiguous = array();
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foreach ($commit_map as $commit) {
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if ($commit->getExplicitRevisionRef()) {
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continue;
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}
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if (!$commit->getRelatedRevisionRefs()) {
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continue;
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}
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$ambiguous[] = $commit;
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}
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if ($ambiguous) {
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foreach ($ambiguous as $commit) {
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$symbols = $commit->getIndirectSymbols();
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$raw_symbols = mpull($symbols, 'getSymbol');
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$symbol_list = implode(', ', $raw_symbols);
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$display_hash = $this->getDisplayHash($hash);
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$revision_refs = $commit->getRelatedRevisionRefs();
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// TODO: Include "use 'arc look --type commit abc' to figure out why"
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// once that works?
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// TODO: We could print all the ambiguous commits.
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// TODO: Suggest "--pick" as a remedy once it exists?
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echo tsprintf(
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"\n%!\n%W\n\n",
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pht('AMBIGUOUS REVISION'),
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pht(
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'The revision associated with commit "%s" (an ancestor of: %s) '.
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'is ambiguous. These %s revision(s) are associated with the '.
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'commit:',
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$display_hash,
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implode(', ', $raw_symbols),
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phutil_count($revision_refs)));
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foreach ($revision_refs as $revision_ref) {
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echo tsprintf(
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'%s',
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$revision_ref->newDisplayRef());
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}
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echo tsprintf("\n");
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throw new PhutilArgumentUsageException(
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pht(
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'Revision for commit "%s" is ambiguous. Use "--revision" to force '.
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'selection of a particular revision.',
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$display_hash));
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}
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}
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// NOTE: We may exit this method with commits that are still unassociated.
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// These will be handled later by the "implicit commits" mechanism.
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}
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final protected function getDisplayHash($hash) {
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