Merge pull request #62 from Peefy/argo-application-field-validation-m…

…odule

feat: add argo application field validation module

argo-application-field-validation/README.md

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+## Introduction
+
+`argo-application-field-validation` is a KCL validation module, which can be used to perform some validation on Argo `Application` fields.
+
+## Resource
+
+The code source and document are [here](https://github.com/kcl-lang/artifacthub/tree/main/argo-application-field-validation)

argo-application-field-validation/kcl.mod

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+[package]
+name = "argo-application-field-validation"
+version = "0.1.0"
+description = "`argo-application-field-validation` is a kcl validation module, which can be used to perform some validation on Argo `Application` fields."
+

argo-application-field-validation/main.k

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+import yaml
+
+# Define the validation function
+validate = lambda item {
+    if item.kind == "Application" and item.apiVersion.startswith("argoproj.io"):
+        path = item?.spec?.source?.path
+        chart = item?.spec?.source?.chart
+        assert (path or chart) and not (path and chart), "`spec.source.path` OR `spec.source.chart` should be specified but never both."
+    item
+}
+# Validate All resource
+items = [validate(i) for i in option("items") or []]
+
+if option("__test__"):
+    validate(yaml.decode("""\
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: badapp01
+  namespace: default
+spec:
+  project: foo
+  source:
+    repoURL: https://github.com/argoproj/argocd-example-apps.git
+    targetRevision: HEAD
+    path: guestbook
+    # chart: foo
+  destination:
+    server: https://kubernetes.default.svc
+    namespace: guestbook
+    """))