D21681.id51612.diff
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D21681.id51612.diff
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	diff --git a/src/filesystem/binary/PhutilMercurialBinaryAnalyzer.php b/src/filesystem/binary/PhutilMercurialBinaryAnalyzer.php
	--- a/src/filesystem/binary/PhutilMercurialBinaryAnalyzer.php
	+++ b/src/filesystem/binary/PhutilMercurialBinaryAnalyzer.php
	@@ -7,6 +7,7 @@

	const CAPABILITY_FILES = 'files';
	const CAPABILITY_INJECTION = 'injection';
	+ const CAPABILITY_TEMPLATE_PNODE = 'template_pnode';

	protected function newBinaryVersion() {
	$future = id(new ExecFuture('hg --version --quiet'))
	@@ -60,6 +61,19 @@
	self::CAPABILITY_INJECTION);
	}

	+ /**
	+ * When using `--template` the format for accessing individual parents
	+ * changed from `{p1node}` to `{p1.node}` in Mercurial 4.9.
	+ *
	+ * @return boolean True if the versino of Mercurial is new enough to support
	+ * the `{p1.node} format in templates, or false if otherwise.
	+ */
	+ public function isMercurialTemplatePnodeAvailable() {
	+ return self::versionHasCapability(
	+ $this->requireBinaryVersion(),
	+ self::CAPABILITY_TEMPLATE_PNODE);
	+ }
	+

	public static function versionHasCapability(
	$mercurial_version,
	@@ -70,6 +84,8 @@
	return version_compare($mercurial_version, '3.2', '>=');
	case self::CAPABILITY_INJECTION:
	return version_compare($mercurial_version, '3.2.4', '<');
	+ case self::CAPABILITY_TEMPLATE_PNODE:
	+ return version_compare($mercurial_version, '4.9', '>=');
	default:
	throw new Exception(
	pht(