feat: Templating of value files

Allow a value file list and allow templating.

index.js

@@ -3,8 +3,10 @@ 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 };
 
 /**
@@ -62,6 +64,33 @@ function getValues(values) {
  return values;
 }
 
+function getSecrets(secrets) {
+ if (typeof secrets === "string") {
+ try {
+ return JSON.stringify(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];
+ }
+ }
+ if (!Array.isArray(fileList)) {
+ return [];
+ }
+ return fileList;
+}
+
 function getInput(name, options) {
  const context = github.context;
  const deployment = context.payload.deployment;
@@ -79,23 +108,43 @@ function getInput(name, options) {
  return val;
 }
 
-function render() {}
+/**
+ * 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);
+}
 
 /**
  * Run executes the helm deployment.
  */
 async function run() {
  try {
+ const context = github.context;
  await status("pending");
 
  const track = getInput("track") || "stable";
  const release = releaseName(getInput("release", required), track);
  const namespace = getInput("namespace", required);
  const chart = chartName(getInput("chart", required));
  const values = getValues(getInput("values"));
- const dryRun = getInput("dry_run");
  const task = getInput("task");
  const version = getInput("version");
+ const valueFiles = getValueFiles(getInput("value_files"));
+
+ const dryRun = core.getInput("dry-run");
+ const secrets = getSecrets(core.getInput("secrets"));
 
  core.debug(`param: track = "${track}"`);
  core.debug(`param: release = "${release}"`);
@@ -105,6 +154,8 @@ async function run() {
  core.debug(`param: dryRun = "${dryRun}"`);
  core.debug(`param: task = "${task}"`);
  core.debug(`param: version = "${version}"`);
+ core.debug(`param: secrets = "${secrets}"`);
+ core.debug(`param: valueFiles = "${valueFiles}"`);
 
  // Setup command options and arguments.
  const opts = { env: {} };
@@ -136,6 +187,12 @@ async function run() {
 
  core.debug(`env: KUBECONFIG="${opts.env.KUBECONFIG}"`);
 
+ // Render value files using github variables.
+ await renderFiles(valueFiles.concat(["./values.yml"]), {
+ secrets,
+ deployment: context.payload.deployment,
+ });
+
  // Actually execute the deployment here.
  if (task === "remove") {
  await exec.exec("helm", ["delete", release, "--purge"], {