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/*
* # ============LICENSE_START=======================================================
* # Copyright (c) 2021 AT&T Intellectual Property. All rights reserved.
* # ================================================================================
* # 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.
* # ============LICENSE_END=========================================================
*/
package org.onap.dcaegen2.platform.helmchartgenerator.chartbuilder;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
/**
* HelmClient implementation which uses helm command installed in the runtime environment.
* @author Dhrumin Desai
*/
@Component
@Slf4j
public class HelmClientImpl implements HelmClient {
/**
* performs <code>helm lint</code> operation
* @param chartLocation helm chart location
*/
@Override
public void lint(File chartLocation) {
ProcessBuilder builder = new ProcessBuilder();
builder.command("helm", "lint", chartLocation.getAbsolutePath());
runProcess(builder, "lint");
}
/**
* performs <code>helm package</code> operation
* @param chartLocation helm chart location
* @param outputLocation location to store the generated helm package
* @return generated helm tgz file
*/
@Override
public File packageChart(File chartLocation, String outputLocation) {
ProcessBuilder builder = new ProcessBuilder();
builder.directory(new File(System.getProperty("user.dir")));
builder.command("helm", "package", "-d", outputLocation, chartLocation.getAbsolutePath());
return runProcess(builder, "package");
}
private File runProcess(ProcessBuilder builder, String command) {
Process process = null;
String chartPath = "";
try {
process = builder.start();
if(command.equals("lint")) {
printLintingProcessOutput(process);
}
else {
chartPath = printPackagingProcessOutput(process);
}
assertExitCode(process);
} catch (IOException e) {
log.error(e.getMessage(), e);
throw new RuntimeException("Error occurred while running helm command.");
} catch (InterruptedException e) {
log.error(e.getMessage(), e);
Thread.currentThread().interrupt();
throw new RuntimeException("execution interrupted");
}
return new File(chartPath);
}
private void printLintingProcessOutput(Process process) throws IOException {
final InputStream inputStream = process.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
reader.lines().forEach(log::info);
inputStream.close();
}
private String printPackagingProcessOutput(Process process) throws IOException {
String helmChartPath = "";
final InputStream inputStream = process.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
String line;
while ((line = reader.readLine()) != null){
if (line.contains("Successfully packaged chart and saved it to: ")){
helmChartPath = line.split("Successfully packaged chart and saved it to: ")[1];
}
log.info(line);
}
inputStream.close();
if(helmChartPath.isEmpty()){
throw new RuntimeException("Could not generate the chart.");
}
return helmChartPath;
}
private void assertExitCode(Process process) throws InterruptedException {
int exitCode = 0;
exitCode = process.waitFor();
process.destroy();
if (exitCode != 0){
throw new RuntimeException("Error occurred while running helm command.");
}
}
}
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