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diff --git a/resources/sql/autopatches/20170109.diff.01.commit.sql b/resources/sql/autopatches/20170109.diff.01.commit.sql
new file mode 100644
--- /dev/null
+++ b/resources/sql/autopatches/20170109.diff.01.commit.sql
@@ -0,0 +1,2 @@
+ALTER TABLE {$NAMESPACE}_differential.differential_diff
+ ADD commitPHID VARBINARY(64);
diff --git a/src/applications/differential/engine/DifferentialDiffExtractionEngine.php b/src/applications/differential/engine/DifferentialDiffExtractionEngine.php
--- a/src/applications/differential/engine/DifferentialDiffExtractionEngine.php
+++ b/src/applications/differential/engine/DifferentialDiffExtractionEngine.php
@@ -26,6 +26,19 @@
public function newDiffFromCommit(PhabricatorRepositoryCommit $commit) {
$viewer = $this->getViewer();
+ // If we already have an unattached diff for this commit, just reuse it.
+ // This stops us from repeatedly generating diffs if something goes wrong
+ // later in the process. See T10968 for context.
+ $existing_diffs = id(new DifferentialDiffQuery())
+ ->setViewer($viewer)
+ ->withCommitPHIDs(array($commit->getPHID()))
+ ->withHasRevision(false)
+ ->needChangesets(true)
+ ->execute();
+ if ($existing_diffs) {
+ return head($existing_diffs);
+ }
+
$repository = $commit->getRepository();
$identifier = $commit->getCommitIdentifier();
$monogram = $commit->getMonogram();
@@ -73,6 +86,7 @@
$diff = DifferentialDiff::newFromRawChanges($viewer, $changes)
->setRepositoryPHID($repository->getPHID())
+ ->setCommitPHID($commit->getPHID())
->setCreationMethod('commit')
->setSourceControlSystem($repository->getVersionControlSystem())
->setLintStatus(DifferentialLintStatus::LINT_AUTO_SKIP)
diff --git a/src/applications/differential/query/DifferentialDiffQuery.php b/src/applications/differential/query/DifferentialDiffQuery.php
--- a/src/applications/differential/query/DifferentialDiffQuery.php
+++ b/src/applications/differential/query/DifferentialDiffQuery.php
@@ -6,6 +6,8 @@
private $ids;
private $phids;
private $revisionIDs;
+ private $commitPHIDs;
+ private $hasRevision;
private $needChangesets = false;
private $needProperties;
@@ -25,6 +27,16 @@
return $this;
}
+ public function withCommitPHIDs(array $phids) {
+ $this->commitPHIDs = $phids;
+ return $this;
+ }
+
+ public function withHasRevision($has_revision) {
+ $this->hasRevision = $has_revision;
+ return $this;
+ }
+
public function needChangesets($bool) {
$this->needChangesets = $bool;
return $this;
@@ -108,27 +120,46 @@
protected function buildWhereClauseParts(AphrontDatabaseConnection $conn) {
$where = parent::buildWhereClauseParts($conn);
- if ($this->ids) {
+ if ($this->ids !== null) {
$where[] = qsprintf(
$conn,
'id IN (%Ld)',
$this->ids);
}
- if ($this->phids) {
+ if ($this->phids !== null) {
$where[] = qsprintf(
$conn,
'phid IN (%Ls)',
$this->phids);
}
- if ($this->revisionIDs) {
+ if ($this->revisionIDs !== null) {
$where[] = qsprintf(
$conn,
'revisionID IN (%Ld)',
$this->revisionIDs);
}
+ if ($this->commitPHIDs !== null) {
+ $where[] = qsprintf(
+ $conn,
+ 'commitPHID IN (%Ls)',
+ $this->commitPHIDs);
+ }
+
+ if ($this->hasRevision !== null) {
+ if ($this->hasRevision) {
+ $where[] = qsprintf(
+ $conn,
+ 'revisionID IS NOT NULL');
+ } else {
+ $where[] = qsprintf(
+ $conn,
+ 'revisionID IS NULL');
+ }
+ }
+
return $where;
}
diff --git a/src/applications/differential/storage/DifferentialDiff.php b/src/applications/differential/storage/DifferentialDiff.php
--- a/src/applications/differential/storage/DifferentialDiff.php
+++ b/src/applications/differential/storage/DifferentialDiff.php
@@ -13,6 +13,7 @@
protected $revisionID;
protected $authorPHID;
protected $repositoryPHID;
+ protected $commitPHID;
protected $sourceMachine;
protected $sourcePath;
@@ -62,6 +63,7 @@
'branch' => 'text255?',
'bookmark' => 'text255?',
'repositoryUUID' => 'text64?',
+ 'commitPHID' => 'phid?',
// T6203/NULLABILITY
// These should be non-null; all diffs should have a creation method
@@ -73,6 +75,9 @@
'revisionID' => array(
'columns' => array('revisionID'),
),
+ 'key_commit' => array(
+ 'columns' => array('commitPHID'),
+ ),
),
) + parent::getConfiguration();
}

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