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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| #!/usr/bin/env zx | ||
| $.verbose = false | ||
|
|
||
| /** | ||
| * * extract-images.mjs | ||
| * * Extracts all container images from a HelmRelease and renders them as a JSON object | ||
| * @param --helmrelease : The source Flux HelmRelease to compare against the target | ||
| * @param --kubernetes-dir : The directory containing your Flux manifests including the HelmRepository manifests | ||
| */ | ||
| const HelmRelease = argv['helmrelease'] | ||
| const KubernetesDir = argv['kubernetes-dir'] | ||
|
|
||
| const helm = await which('helm') | ||
| const kustomize = await which('kustomize') | ||
|
|
||
| function extractImageValues(data) { | ||
| const imageValues = []; | ||
| function extractValues(obj) { | ||
| for (const key in obj) { | ||
| if (typeof obj[key] === 'object') { | ||
| extractValues(obj[key]); | ||
| } else if (key === 'image') { | ||
| imageValues.push(obj[key]); | ||
| } | ||
| } | ||
| } | ||
| extractValues(data); | ||
| return imageValues; | ||
| } | ||
|
|
||
| async function parseHelmRelease(releaseFile) { | ||
| const helmRelease = await fs.readFile(releaseFile, 'utf8') | ||
| const doc = YAML.parseAllDocuments(helmRelease).map((item) => item.toJS()) | ||
| const release = doc.filter((item) => | ||
| item.apiVersion === 'helm.toolkit.fluxcd.io/v2beta2' | ||
| && item.kind === 'HelmRelease' | ||
| ) | ||
| return release[0] | ||
| } | ||
|
|
||
| async function parseHelmRepository(kubernetesDir, releaseName) { | ||
| const files = await globby([`${kubernetesDir}/**/*.yaml`]) | ||
| for await (const file of files) { | ||
| const contents = await fs.readFile(file, 'utf8') | ||
| const repository = YAML.parseAllDocuments(contents).map((item) => item.toJS()) | ||
| if (repository[0] && 'apiVersion' in repository[0] && repository[0].apiVersion === 'source.toolkit.fluxcd.io/v1beta2' | ||
| && 'kind' in repository[0] && repository[0].kind === 'HelmRepository' | ||
| && 'metadata' in repository[0] && 'name' in repository[0].metadata && repository[0].metadata.name === releaseName) | ||
| { | ||
| return repository[0] | ||
| } | ||
| } | ||
| } | ||
|
|
||
| async function renderKustomize(releaseBaseDir, releaseName) { | ||
| const build = await $`${kustomize} build --load-restrictor=LoadRestrictionsNone ${releaseBaseDir}` | ||
| const docs = YAML.parseAllDocuments(build.stdout).map((item) => item.toJS()) | ||
| const release = docs.filter((item) => | ||
| item.apiVersion === 'helm.toolkit.fluxcd.io/v2beta2' | ||
| && item.kind === 'HelmRelease' | ||
| && item.metadata.name === releaseName | ||
| ) | ||
| return release[0] | ||
| } | ||
|
|
||
| async function helmTemplate(release, repository) { | ||
| const values = new YAML.Document() | ||
| values.contents = release.spec.values | ||
| const valuesFile = await $`mktemp` | ||
| await fs.writeFile(valuesFile.stdout.trim(), values.toString()) | ||
|
|
||
| // Template out helm values into Kubernetes manifests | ||
| let manifests | ||
| if ('type' in repository.spec && repository.spec.type == 'oci') { | ||
| manifests = await $`${helm} template --kube-version 1.28.0 --release-name ${release.metadata.name} --include-crds=false --skip-tests ${repository.spec.url}/${release.spec.chart.spec.chart} --version ${release.spec.chart.spec.version} --values ${valuesFile.stdout.trim()}` | ||
| } else { | ||
| await $`${helm} repo add ${release.spec.chart.spec.sourceRef.name} ${repository.spec.url}` | ||
| manifests = await $`${helm} template --kube-version 1.28.0 --release-name ${release.metadata.name} --include-crds=false --skip-tests ${release.spec.chart.spec.sourceRef.name}/${release.spec.chart.spec.chart} --version ${release.spec.chart.spec.version} --values ${valuesFile.stdout.trim()}` | ||
| } | ||
|
|
||
| let documents = YAML.parseAllDocuments(manifests.stdout.trim()).map((item) => item.toJS()) | ||
|
|
||
| const images = []; | ||
| documents.forEach((doc) => { | ||
| const docImageValues = extractImageValues(doc); | ||
| images.push(...docImageValues); | ||
| }); | ||
| return images; | ||
| } | ||
|
|
||
| const helmRelease = await parseHelmRelease(HelmRelease) | ||
| const kustomizeBuild = await renderKustomize(path.dirname(HelmRelease), helmRelease.metadata.name) | ||
| const helmRepository = await parseHelmRepository(KubernetesDir, kustomizeBuild.spec.chart.spec.sourceRef.name) | ||
| const images = await helmTemplate(kustomizeBuild, helmRepository) | ||
|
|
||
| echo(JSON.stringify(images)) |
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