DiffusionMercurialMergedCommitsQuery.php
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	<?php

	final class DiffusionMercurialMergedCommitsQuery
	extends DiffusionMergedCommitsQuery {

	protected function executeQuery() {
	$request = $this->getRequest();
	$repository = $request->getRepository();

	list($parents) = $repository->execxLocalCommand(
	'parents --template=%s --rev %s',
	'{node}\\n',
	$request->getCommit());
	$parents = explode("\n", trim($parents));

	if (count($parents) < 2) {
	// Not a merge commit.
	return array();
	}

	// NOTE: In Git, the first parent is the "mainline". In Mercurial, the
	// second parent is the "mainline" (the way 'git merge' and 'hg merge'
	// work is also reversed).

	$last_parent = last($parents);
	list($logs) = $repository->execxLocalCommand(
	'log --template=%s --follow --limit %d --rev %s:0 --prune %s --',
	'{node}\\n',
	$this->getLimit() + 1,
	$request->getCommit(),
	$last_parent);

	$hashes = explode("\n", trim($logs));

	// Remove the merge commit.
	$hashes = array_diff($hashes, array($request->getCommit()));

	return $this->loadHistoryForCommitIdentifiers($hashes);
	}

	}