From ed91bce275328d8873afcfdcb707a6939048985e Mon Sep 17 00:00:00 2001
From: Yujun Zhang <yujunz@nvidia.com>
Date: Fri, 30 Aug 2019 11:01:42 +0800
Subject: [PATCH] Add example plugin for go-getter

---
 docs/plugins/README.md                        |  3 +-
 .../someteam.example.com/v1/gogetter/GoGetter | 46 +++++++++++++++++++
 .../v1/gogetter/GoGetter_test.go              | 45 ++++++++++++++++++
 3 files changed, 93 insertions(+), 1 deletion(-)
 create mode 100755 plugin/someteam.example.com/v1/gogetter/GoGetter
 create mode 100644 plugin/someteam.example.com/v1/gogetter/GoGetter_test.go

diff --git a/docs/plugins/README.md b/docs/plugins/README.md
index 730897a0e..f250da22b 100644
--- a/docs/plugins/README.md
+++ b/docs/plugins/README.md
@@ -223,6 +223,7 @@ provided in the kustomization file).
 [helm chart inflator]: ../../plugin/someteam.example.com/v1/chartinflator
 [bashed config map]: ../../plugin/someteam.example.com/v1/bashedconfigmap
 [sed transformer]: ../../plugin/someteam.example.com/v1/sedtransformer
+[hashicorp go-getter]: ../../plugin/someteam.example.com/v1/gogetter
 
 #### Examples
 
@@ -230,7 +231,7 @@ provided in the kustomization file).
  * [bashed config map] -  Super simple configMap generation from bash.
  * [sed transformer] - Define your unstructured edits using a
    plugin like this one.
-
+ * [hashicorp go-getter] - Download kustomize layes and build it to generate resources
 
 A generator plugin accepts nothing on `stdin`, but emits
 generated resources to `stdout`.
diff --git a/plugin/someteam.example.com/v1/gogetter/GoGetter b/plugin/someteam.example.com/v1/gogetter/GoGetter
new file mode 100755
index 000000000..958b29e40
--- /dev/null
+++ b/plugin/someteam.example.com/v1/gogetter/GoGetter
@@ -0,0 +1,46 @@
+#!/bin/bash
+# Copyright 2019 The Kubernetes Authors.
+# SPDX-License-Identifier: Apache-2.0
+
+# HashiCorp go-getter
+#
+# Reads a file like this
+#
+#  apiVersion: someteam.example.com/v1
+#  kind: GoGetter
+#  metadata:
+#    name: example
+#  url: github.com/kustless/kustomize-examples.git
+#  # overlay: base  # (optional) relative path in the package
+#
+# download kustomize layes and build it to stdout
+#
+# Example execution:
+# ./plugin/someteam.example.com/v1/gogetter/GoGetter configFile.yaml
+#
+# TODO: cache downloads
+
+set -e
+
+# YAML parsing function borrowed from ChartInflator
+function parseYaml {
+  local file=$1
+  while read -r line
+  do
+    local k=${line%:*}
+    local v=${line#*:}
+    local t=${v#"${v%%[![:space:]]*}"}  # trim leading space
+
+    if [ "$k" == "url" ]; then url=$t
+    elif [ "$k" == "overlay" ]; then overlay=$t
+    fi
+  done <"$file"
+}
+
+TMP_DIR=$(mktemp -d)
+
+parseYaml $1
+go-getter $url $TMP_DIR/got 2> /dev/null
+kustomize build $TMP_DIR/got/$overlay
+
+/bin/rm -rf $TMP_DIR
diff --git a/plugin/someteam.example.com/v1/gogetter/GoGetter_test.go b/plugin/someteam.example.com/v1/gogetter/GoGetter_test.go
new file mode 100644
index 000000000..226c4a128
--- /dev/null
+++ b/plugin/someteam.example.com/v1/gogetter/GoGetter_test.go
@@ -0,0 +1,45 @@
+// +build notravis
+
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+// Disabled on travis, because don't want to install go-getter on travis.
+
+package main_test
+
+import (
+	"testing"
+
+	kusttest_test "sigs.k8s.io/kustomize/v3/pkg/kusttest"
+	plugins_test "sigs.k8s.io/kustomize/v3/pkg/plugins/test"
+)
+
+// This test requires having the go-getter binary on the PATH.
+//
+func TestGoGetter(t *testing.T) {
+	tc := plugins_test.NewEnvForTest(t).Set()
+	defer tc.Reset()
+
+	tc.BuildExecPlugin(
+		"someteam.example.com", "v1", "GoGetter")
+
+	th := kusttest_test.NewKustTestPluginHarness(t, "/app")
+
+	m := th.LoadAndRunGenerator(`
+apiVersion: someteam.example.com/v1
+kind: GoGetter
+metadata:
+  name: example
+url: github.com/kustless/kustomize-examples.git
+`)
+
+	th.AssertActualEqualsExpected(m, `
+apiVersion: v1
+data:
+  altGreeting: Good Morning!
+  enableRisky: "false"
+kind: ConfigMap
+metadata:
+  name: the-map
+`)
+}