Add support for incrementing prerelease

Author: tfirdaus

app/Commands/IncrementCommand.php

@@ -28,7 +28,7 @@ protected function configure(): void
 		$this->setDescription('Increment a version');
 		$this->setAliases(['incr']);
 		$this->addArgument('version', InputArgument::REQUIRED, 'Version to increment');
-		$this->addOption('part', 'p', InputArgument::OPTIONAL, 'Part to increment (major, minor, patch)', 'patch');
+		$this->addOption('part', 'p', InputArgument::OPTIONAL, 'Part to increment (major, minor, patch, and prerelease)', 'patch');
 		$this->addOption('build', 'b', InputArgument::OPTIONAL, 'Build metadata to append to the version');
 		$this->addOption('pre', null, InputArgument::OPTIONAL, 'Pre-release identifier to append to the version');
 		$this->setHelp(<<<'HELP'
@@ -104,11 +104,29 @@ private function increment(Version $version, string $part, $pre = null, $build =
 				$version = $version->incrementPatch();
 				break;
 
+			case 'prerelease':
+				$currentPrerelease = $version->getPreRelease();
+
+				if ($currentPrerelease === null) {
+					throw new InvalidArgumentException('Unable to increment prerelease on a version without a prerelease tag.');
+				}
+
+				if ($pre !== null && is_string($pre) && $pre !== '') {
+					throw new InvalidArgumentException('Specifying a prerelease tag when incrementing the prerelease part is not allowed.');
+				}
+
+				$identifier = $currentPrerelease->getIdentifiers();
+				$preTag = $identifier[0];
+				$preVersion = (int) ($identifier[1] ?? 0) + 1;
+				$version = $version->withPreRelease(sprintf('%s.%d', $preTag, $preVersion));
+
+				break;
+
 			default:
-				throw new InvalidArgumentException(sprintf("Invalid part '%s' provided. Expected 'major', 'minor', or 'patch'.", $part));
+				throw new InvalidArgumentException(sprintf("Invalid part '%s' provided. Expected 'major', 'minor', 'patch', or 'prerelease'.", $part));
 		}
 
-		if (is_string($pre) && $pre !== '') {
+		if ($part !== 'prerelease' && is_string($pre) && $pre !== '') {
 			$version = $version->withPreRelease($pre);
 		}
 

tests/bashunit/test_increment.sh

@@ -17,7 +17,7 @@ function test_increment_major() {
 }
 
 # @data_provider data_increment_with_pre_release
-function test_increment_with_pre_release() {
+function test_increment_with_prerelease() {
 	ver=$(bin/version increment $1 --pre alpha);
 	assert_equals $ver $2;
 }
@@ -34,6 +34,16 @@ function test_increment_with_pre_release_and_build() {
 	assert_equals $ver $2;
 }
 
+# @data_provider data_increment_prerelease
+function test_increment_with_prerelease_and_build() {
+	ver=$(bin/version increment $1 --part prerelease);
+	assert_equals $ver $2;
+}
+
+function data_increment_prerelease() {
+	echo "1.0.0-beta" "1.0.0-beta.1";
+}
+
 function data_increment_patch() {
 	echo "0.0.0" "0.0.1";
 	echo "1.0.0" "1.0.1";

tests/phpunit/Commands/IncrementCommandTest.php

@@ -84,6 +84,45 @@ public function testIncrementWithPreRelease(): void
 		);
 	}
 
+	/**
+	 * @dataProvider dataIncrementPrerelease
+	 */
+	public function testIncrementPrerelease(string $version, string $expect): void
+	{
+		$this->tester->execute(['version' => $version, '--part' => 'prerelease']);
+
+		self::assertStringContainsString(
+			$expect,
+			$this->tester->getDisplay(),
+		);
+	}
+
+	public static function dataIncrementPrerelease(): iterable
+	{
+		yield ['1.0.0-beta', '1.0.0-beta.1'];
+		yield ['1.0.0-alpha.1', '1.0.0-alpha.2'];
+	}
+
+	public function testIncrementPrereleaseWithPreTag(): void
+	{
+		$this->tester->execute(['version' => '1.0.0-beta', '--part' => 'prerelease', '--pre' => 'rc']);
+
+		self::assertStringContainsString(
+			"[ERROR] Specifying a prerelease tag when incrementing the prerelease part is not allowed.",
+			$this->tester->getDisplay(),
+		);
+	}
+
+	public function testIncrementPrereleaseWithoutReleaseTag(): void
+	{
+		$this->tester->execute(['version' => '1.0.0', '--part' => 'prerelease']);
+
+		self::assertStringContainsString(
+			"[ERROR] Unable to increment prerelease on a version without a prerelease tag.",
+			$this->tester->getDisplay(),
+		);
+	}
+
 	public static function dataInvalidVersionArgument(): iterable
 	{
 		yield ['v'];