com.deviceinsight.helm.LintMojo.kt Maven / Gradle / Ivy

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A Maven Plugin for Helm Charts
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/*
 * Copyright 2018-2019 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.deviceinsight.helm

import org.apache.maven.plugin.MojoExecutionException
import org.apache.maven.plugins.annotations.LifecyclePhase
import org.apache.maven.plugins.annotations.Mojo
import org.apache.maven.plugins.annotations.Parameter
import java.io.File


@Mojo(name = "lint", defaultPhase = LifecyclePhase.PRE_INTEGRATION_TEST)
class LintMojo : AbstractHelmMojo() {

	/**
	 * An optional values.yaml file that is used to run linting, relative to `${project.basedir}`.
	 */
	@Parameter(property = "valuesFile", required = false)
	private var valuesFile: String? = null

	@Parameter(property = "strictLint", required = false, defaultValue = "false")
	private var strictLint: Boolean = false

	@Parameter(property = "helm.skip", defaultValue = "false")
	private var skip: Boolean = false

	@Throws(MojoExecutionException::class)
	override fun execute() {

		if (skip) {
			log.info("helm-lint has been skipped")
			return
		}

		try {

			if (!isChartFolderPresent()) {
				log.warn("No sources found skipping helm lint.")
				return
			}

			val helm = resolveHelmBinary()

			val command = mutableListOf(helm, "lint", chartName())

			if (strictLint) {
				command.add("--strict")
			}

			if (valuesFile != null) {
				command.add("--values")
				command.add(quoteFilePath(project.basedir.resolve(valuesFile!!).absolutePath))
			}

			executeCommand(command)

		} catch (e: Exception) {
			throw MojoExecutionException("Error rendering helm lint: ${e.message}", e)
		}
	}

	private fun executeCommand(command: List, directory: File = target()) {
		val proc = ProcessBuilder(command)
			.directory(directory)
			.redirectOutput(ProcessBuilder.Redirect.PIPE)
			.redirectErrorStream(true)
			.start()

		proc.waitFor()

		log.debug("When executing '${command.joinToString(" ")}' in '${directory.absolutePath}', " +
			"result was ${proc.exitValue()}")
		proc.inputStream.bufferedReader().lines().forEach {
			log.info("Output: $it")
		}

		if (proc.exitValue() != 0) {
			throw RuntimeException(
				"When executing '${command.joinToString(" ")}' got result code '${proc.exitValue()}'")
		}
	}
}