ArcanistCoverWorkflow.php
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	<?php

	/**
	* Covers your professional reputation by blaming changes to locate reviewers.
	*
	* @group workflow
	*/
	final class ArcanistCoverWorkflow extends ArcanistBaseWorkflow {

	public function getWorkflowName() {
	return 'cover';
	}

	public function getCommandSynopses() {
	return phutil_console_format(<<<EOTEXT
	cover [--rev __revision__] [__path__ ...]
	EOTEXT
	);
	}

	public function getCommandHelp() {
	return phutil_console_format(<<<EOTEXT
	Supports: svn, git, hg
	Cover your... professional reputation. Show blame for the lines you
	changed in your working copy (svn) or since some commit (hg, git).
	This will take a minute because blame takes a minute, especially under
	SVN.
	EOTEXT
	);
	}

	public function getArguments() {
	return array(
	'rev' => array(
	'param' => 'revision',
	'help' => 'Cover changes since a specific revision.',
	'supports' => array(
	'git',
	'hg',
	),
	'nosupport' => array(
	'svn' => "cover does not currently support --rev in svn.",
	),
	),
	'*' => 'paths',
	);
	}

	public function requiresWorkingCopy() {
	return true;
	}

	public function requiresConduit() {
	return false;
	}

	public function requiresAuthentication() {
	return false;
	}

	public function requiresRepositoryAPI() {
	return true;
	}

	public function run() {

	$repository_api = $this->getRepositoryAPI();

	$in_paths = $this->getArgument('paths');
	$in_rev = $this->getArgument('rev');

	if ($in_rev) {
	$this->parseBaseCommitArgument(array($in_rev));
	}

	$paths = $this->selectPathsForWorkflow(
	$in_paths,
	$in_rev,
	ArcanistRepositoryAPI::FLAG_UNTRACKED \|
	ArcanistRepositoryAPI::FLAG_ADDED);

	if (!$paths) {
	throw new ArcanistNoEffectException(
	"You're covered, you didn't change anything.");
	}

	$covers = array();
	foreach ($paths as $path) {
	if (is_dir($repository_api->getPath($path))) {
	continue;
	}

	$lines = $this->getChangedLines($path, 'cover');
	if (!$lines) {
	continue;
	}

	$blame = $repository_api->getBlame($path);
	foreach ($lines as $line) {
	list($author, $revision) = idx($blame, $line, array(null, null));
	if (!$author) {
	continue;
	}
	if (!isset($covers[$author])) {
	$covers[$author] = array();
	}
	if (!isset($covers[$author][$path])) {
	$covers[$author][$path] = array(
	'lines' => array(),
	'revisions' => array(),
	);
	}
	$covers[$author][$path]['lines'][] = $line;
	$covers[$author][$path]['revisions'][] = $revision;
	}
	}

	if (count($covers)) {
	foreach ($covers as $author => $files) {
	echo phutil_console_format(
	"%s\n",
	$author);
	foreach ($files as $file => $info) {
	$line_noun = pht('line(s)', count($info['lines']));
	$lines = $this->readableSequenceFromLineNumbers($info['lines']);
	echo " {$file}: {$line_noun} {$lines}\n";
	}
	}
	} else {
	echo "You're covered, your changes didn't touch anyone else's code.\n";
	}

	return 0;
	}

	private function readableSequenceFromLineNumbers(array $array) {
	$sequence = array();
	$last = null;
	$seq = null;
	$array = array_unique(array_map('intval', $array));
	sort($array);
	foreach ($array as $element) {
	if ($seq !== null && $element == ($seq + 1)) {
	$seq++;
	continue;
	}

	if ($seq === null) {
	$last = $element;
	$seq = $element;
	continue;
	}

	if ($seq > $last) {
	$sequence[] = $last.'-'.$seq;
	} else {
	$sequence[] = $last;
	}

	$last = $element;
	$seq = $element;
	}
	if ($last !== null && $seq > $last) {
	$sequence[] = $last.'-'.$seq;
	} else if ($last !== null) {
	$sequence[] = $element;
	}

	return implode(', ', $sequence);
	}

	}

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