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index.js
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index.js
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const core = require("@actions/core");
const github = require("@actions/github");
const exec = require("@actions/exec");
const fs = require("fs");
const util = require("util");
const Mustache = require("mustache");
const writeFile = util.promisify(fs.writeFile);
const readFile = util.promisify(fs.readFile);
const required = { required: true };
/**
* Status marks the deployment status. Only activates if token is set as an
* input to the job.
*
* @param {string} state
*/
async function status(state) {
try {
const context = github.context;
const deployment = context.payload.deployment;
const token = core.getInput("token");
if (!token || !deployment) {
core.debug("not setting deployment status");
return;
}
const client = new github.GitHub(token);
const url = `https://github.com/${context.repo.owner}/${context.repo.repo}/commit/${context.sha}/checks`;
await client.repos.createDeploymentStatus({
...context.repo,
deployment_id: deployment.id,
state,
log_url: url,
target_url: url,
headers: {
accept: 'application/vnd.github.ant-man-preview+json'
}
});
} catch (error) {
core.warning(`Failed to set deployment status: ${error.message}`);
}
}
function releaseName(name, track) {
if (track !== "stable") {
return `${name}-${track}`;
}
return name;
}
function chartName(name) {
if (name === "app") {
return "/usr/src/charts/app";
}
return name;
}
function getValues(values) {
if (!values) {
return "{}";
}
if (typeof values === "object") {
return JSON.stringify(values);
}
return values;
}
function getSecrets(secrets) {
if (typeof secrets === "string") {
try {
return JSON.parse(secrets);
} catch (err) {
return secrets;
}
}
return secrets;
}
function getValueFiles(files) {
let fileList;
if (typeof files === "string") {
try {
fileList = JSON.parse(files);
} catch (err) {
// Assume it's a single string.
fileList = [files];
}
} else {
fileList = files;
}
if (!Array.isArray(fileList)) {
return [];
}
return fileList.filter(f => !!f);
}
function getInput(name, options) {
const context = github.context;
const deployment = context.payload.deployment;
let val = core.getInput(name.replace("_", "-"), {
...options,
required: false
});
if (deployment) {
if (deployment[name]) val = deployment[name];
if (deployment.payload[name]) val = deployment.payload[name];
}
if (options && options.required && !val) {
throw new Error(`Input required and not supplied: ${name}`);
}
return val;
}
/**
* Render files renders data into the list of provided files.
* @param {Array<string>} files
* @param {any} data
*/
function renderFiles(files, data) {
core.debug(
`rendering value files [${files.join(",")}] with: ${JSON.stringify(data)}`
);
const tags = ["${{", "}}"];
const promises = files.map(async file => {
const content = await readFile(file, { encoding: "utf8" });
const rendered = Mustache.render(content, data, {}, tags);
await writeFile(file, rendered);
});
return Promise.all(promises);
}
/**
* Makes a delete command for compatibility between helm 2 and 3.
*
* @param {string} helm
* @param {string} namespace
* @param {string} release
*/
function deleteCmd(helm, namespace, release) {
if (helm === "helm3") {
return ["delete", "-n", namespace, release];
}
return ["delete", "--purge", release];
}
/**
* Run executes the helm deployment.
*/
async function run() {
try {
const context = github.context;
await status("pending");
const track = getInput("track") || "stable";
const appName = getInput("release", required);
const release = releaseName(appName, track);
const namespace = getInput("namespace", required);
const chart = chartName(getInput("chart", required));
const chartVersion = getInput("chart_version");
const values = getValues(getInput("values"));
const task = getInput("task");
const version = getInput("version");
const valueFiles = getValueFiles(getInput("value_files"));
const removeCanary = getInput("remove_canary");
const helm = getInput("helm") || "helm";
const timeout = getInput("timeout");
const repository = getInput("repository");
const dryRun = core.getInput("dry-run");
const debug = core.getInput("debug");
const secrets = getSecrets(core.getInput("secrets"));
const atomic = getInput("atomic") || true;
core.debug(`param: track = "${track}"`);
core.debug(`param: release = "${release}"`);
core.debug(`param: appName = "${appName}"`);
core.debug(`param: namespace = "${namespace}"`);
core.debug(`param: chart = "${chart}"`);
core.debug(`param: chart_version = "${chartVersion}"`);
core.debug(`param: values = "${values}"`);
core.debug(`param: dryRun = "${dryRun}"`);
core.debug(`param: debug = "${debug}"`);
core.debug(`param: task = "${task}"`);
core.debug(`param: version = "${version}"`);
core.debug(`param: secrets = "${JSON.stringify(secrets)}"`);
core.debug(`param: valueFiles = "${JSON.stringify(valueFiles)}"`);
core.debug(`param: removeCanary = ${removeCanary}`);
core.debug(`param: timeout = "${timeout}"`);
core.debug(`param: repository = "${repository}"`);
core.debug(`param: atomic = "${atomic}"`);
// Setup command options and arguments.
const args = [
"upgrade",
release,
chart,
"--install",
"--wait",
`--namespace=${namespace}`,
];
// Per https://helm.sh/docs/faq/#xdg-base-directory-support
if (helm === "helm3") {
process.env.XDG_DATA_HOME = "/root/.helm/"
process.env.XDG_CACHE_HOME = "/root/.helm/"
process.env.XDG_CONFIG_HOME = "/root/.helm/"
} else {
process.env.HELM_HOME = "/root/.helm/"
}
if (debug) args.push("--debug");
if (dryRun) args.push("--dry-run");
if (appName) args.push(`--set=app.name=${appName}`);
if (version) args.push(`--set=app.version=${version}`);
if (chartVersion) args.push(`--version=${chartVersion}`);
if (timeout) args.push(`--timeout=${timeout}`);
if (repository) args.push(`--repo=${repository}`);
valueFiles.forEach(f => args.push(`--values=${f}`));
args.push("--values=./values.yml");
// Special behaviour is triggered if the track is labelled 'canary'. The
// service and ingress resources are disabled. Access to the canary
// deployments can be routed via the main stable service resource.
if (track === "canary") {
args.push("--set=service.enabled=false", "--set=ingress.enabled=false");
}
// If true upgrade process rolls back changes made in case of failed upgrade.
if (atomic === true) {
args.push("--atomic");
}
// Setup necessary files.
if (process.env.KUBECONFIG_FILE) {
process.env.KUBECONFIG = "./kubeconfig.yml";
await writeFile(process.env.KUBECONFIG, process.env.KUBECONFIG_FILE);
}
await writeFile("./values.yml", values);
core.debug(`env: KUBECONFIG="${process.env.KUBECONFIG}"`);
// Render value files using github variables.
await renderFiles(valueFiles.concat(["./values.yml"]), {
secrets,
deployment: context.payload.deployment,
});
// Remove the canary deployment before continuing.
if (removeCanary) {
core.debug(`removing canary ${appName}-canary`);
await exec.exec(helm, deleteCmd(helm, namespace, `${appName}-canary`), {
ignoreReturnCode: true
});
}
// Actually execute the deployment here.
if (task === "remove") {
await exec.exec(helm, deleteCmd(helm, namespace, release), {
ignoreReturnCode: true
});
} else {
await exec.exec(helm, args);
}
await status(task === "remove" ? "inactive" : "success");
} catch (error) {
core.error(error);
core.setFailed(error.message);
await status("failure");
}
}
run();