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Add a diff kustomization feature

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If implemented it will permit queriying the Kubernetes API to fetch the specified
Flux Kustomization, then uses the specified path to build the overlay.
It will then ssa-dry-run apply and output the diff using homeport/dyff

Signed-off-by: Soule BA <soule@weave.works>
This commit is contained in:
Soule BA
2021-12-08 17:22:10 +01:00
parent 70fb87bc93
commit 9376c9a946
8 changed files with 517 additions and 29 deletions
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21
cmd/flux/build_kustomization.go
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@@ -30,22 +30,23 @@ var buildKsCmd = &cobra.Command{
Use: "kustomization",
Aliases: []string{"ks"},
Short: "Build Kustomization",
Long: `The build command queries the Kubernetes API and fetches the specified Flux Kustomization,
then it uses the specified files or path to build the overlay to write the resulting multi-doc YAML to stdout.`,
Long: `The build command queries the Kubernetes API and fetches the specified Flux Kustomization.
It then uses the fetched in cluster flux kustomization to perform needed transformation on the local kustomization.yaml
pointed at by --path. The local kustomization.yaml is generated if it does not exist. Finally it builds the overlays using the local kustomization.yaml, and write the resulting multi-doc YAML to stdout.`,
Example: `# Create a new overlay.
flux build kustomization my-app --resources ./path/to/local/manifests`,
flux build kustomization my-app --path ./path/to/local/manifests`,
ValidArgsFunction: resourceNamesCompletionFunc(kustomizev1.GroupVersion.WithKind(kustomizev1.KustomizationKind)),
RunE: buildKsCmdRun,
}
type buildKsFlags struct {
resources string
path string
}
var buildKsArgs buildKsFlags
func init() {
buildKsCmd.Flags().StringVar(&buildKsArgs.resources, "resources", "", "Name of a file containing a file to add to the kustomization file.)")
buildKsCmd.Flags().StringVar(&buildKsArgs.path, "path", "", "Path to the manifests location.)")
buildCmd.AddCommand(buildKsCmd)
}
@@ -55,15 +56,15 @@ func buildKsCmdRun(cmd *cobra.Command, args []string) error {
}
name := args[0]
if buildKsArgs.resources == "" {
return fmt.Errorf("invalid resource path %q", buildKsArgs.resources)
if buildKsArgs.path == "" {
return fmt.Errorf("invalid resource path %q", buildKsArgs.path)
}
if fs, err := os.Stat(buildKsArgs.resources); err != nil || !fs.IsDir() {
return fmt.Errorf("invalid resource path %q", buildKsArgs.resources)
if fs, err := os.Stat(buildKsArgs.path); err != nil || !fs.IsDir() {
return fmt.Errorf("invalid resource path %q", buildKsArgs.path)
}
builder, err := kustomization.NewBuilder(rootArgs.kubeconfig, rootArgs.kubecontext, rootArgs.namespace, name, buildKsArgs.resources, kustomization.WithTimeout(rootArgs.timeout))
builder, err := kustomization.NewBuilder(rootArgs.kubeconfig, rootArgs.kubecontext, rootArgs.namespace, name, buildKsArgs.path, kustomization.WithTimeout(rootArgs.timeout))
if err != nil {
return err
}