Add KOTS unstable publish to werft

When a build is run on the main branch, it publishes the latest
release to the unstable channel in KOTS.

Author: Simon Emms

.werft/build.ts

@@ -11,6 +11,7 @@ import { deployToPreviewEnvironment } from './jobs/build/deploy-to-preview-envir
 import { triggerIntegrationTests } from './jobs/build/trigger-integration-tests';
 import { jobConfig } from './jobs/build/job-config';
 import { typecheckWerftJobs } from './jobs/build/typecheck-werft-jobs';
+import { publishKotsUnstable } from './jobs/build/publish-kots-unstable'
 
 // Will be set once tracing has been initialized
 let werft: Werft
@@ -59,4 +60,5 @@ async function run(context: any) {
 
     await deployToPreviewEnvironment(werft, config)
     await triggerIntegrationTests(werft, config, context.Owner)
+    await publishKotsUnstable(werft, config)
 }

.werft/jobs/build/publish-kots-unstable.ts

@@ -0,0 +1,39 @@
+import { exec } from '../../util/shell';
+import { Werft } from "../../util/werft";
+import { JobConfig } from "./job-config";
+
+const phases = {
+    PUBLISH_KOTS_UNSTABLE: 'publish kots unstable',
+};
+
+const REPLICATED_SECRET = 'replicated';
+const REPLICATED_CHANNEL = 'Unstable';
+const REPLICATED_YAML_DIR = './install/kots/manifests';
+const INSTALLER_JOB_IMAGE = 'spec.template.spec.containers[0].image';
+
+export async function publishKotsUnstable(werft: Werft, config: JobConfig) {
+    if (config.mainBuild) {
+        werft.phase(phases.PUBLISH_KOTS_UNSTABLE, 'Publish unstable release to KOTS');
+
+        const imageAndTag = exec(`yq r ${REPLICATED_YAML_DIR}/gitpod-installer-job.yaml ${INSTALLER_JOB_IMAGE}`);
+        const [image] = imageAndTag.split(':');
+
+        // Set the tag to the current version
+        exec(`yq w -i ${REPLICATED_YAML_DIR}/gitpod-installer-job.yaml ${INSTALLER_JOB_IMAGE} ${image}:${config.version}`);
+
+        const app = exec(`kubectl get secret ${REPLICATED_SECRET} --namespace werft -o jsonpath='{.data.app}' | base64 -d`);
+        const token = exec(`kubectl get secret ${REPLICATED_SECRET} --namespace werft -o jsonpath='{.data.token}' | base64 -d`);
+
+        exec(`replicated release create \
+            --lint \
+            --ensure-channel \
+            --app ${app} \
+            --token ${token} \
+            --yaml-dir ${REPLICATED_YAML_DIR} \
+            --version ${config.version} \
+            --release-notes "# ${config.version}\n\nSee [Werft job](https://werft.gitpod-dev.com/job/gitpod-build-${config.version}/logs) for notes" \
+            --promote ${REPLICATED_CHANNEL}`);
+
+        werft.done(phases.PUBLISH_KOTS_UNSTABLE);
+    }
+}