Project tweaks

Makefile

@@ -8,4 +8,4 @@ build:
 
 install: build
 	mkdir -p ~/.tflint.d/plugins
-	mv ./tflint-ruleset-template ~/.tflint.d/plugins
+	mv ./tflint-ruleset-google ~/.tflint.d/plugins

README.md

@@ -1,6 +1,19 @@
-# TFLint Ruleset Template
+# WORKING IN PROGRESS AND MAINTAINER WANTED!
 
-This is a template repository for building a custom ruleset. You can create a plugin repository from "Use this template".
+This project was started to support terraform-provider-google resources in TFLint. Everything is working in progress and not available as a plugin. If you are interested in this project, consider the following:
+
+- Open an issue for the rule you want
+  - Provider-specific knowledge is very important. Sharing the problems you faced will make it clear what we need to develop.
+- Write a rule and open a pull request
+  - If you are already familiar with tflint rulesets, Writing rules to solve open issues helps all users of TFLint. If you are interested but are not familiar, please let us know. Support you as much as possible.
+- Make automatic rule generation system
+  - In reality, it is impossible to manage rules for so many resources by hand. tflint has a mechanism to automatically generate AWS validation rules from aws-sdk (See [here](https://github.com/terraform-linters/tflint/blob/master/docs/DEVELOPING.md#sdk-based)). Building such a system can bring a lot of value at low cost.
+
+See [terraform-lintes/tflint#606](https://github.com/terraform-linters/tflint/issues/606) for more details.
+
+# TFLint Ruleset for terraform-provider-google
+
+TFLint ruleset plugin for Terraform Google Cloud Platform provider
 
 ## Requirements
 
@@ -9,10 +22,10 @@ This is a template repository for building a custom ruleset. You can create a pl
 
 ## Installation
 
-Download the plugin and place it in `~/.tflint.d/plugins/tflint-ruleset-template` (or `./.tflint.d/plugins/tflint-ruleset-template`). When using the plugin, configure as follows in `.tflint.hcl`:
+Download the plugin and place it in `~/.tflint.d/plugins/tflint-ruleset-google` (or `./.tflint.d/plugins/tflint-ruleset-google`). When using the plugin, configure as follows in `.tflint.hcl`:
 
 ```hcl
-plugin "template" {
+plugin "google" {
     enabled = true
 }
 ```
@@ -21,7 +34,7 @@ plugin "template" {
 
 |Name|Description|Severity|Enabled|Link|
 | --- | --- | --- | --- | --- |
-|aws_instance_example_type|Show instance type|ERROR|✔||
+|google_compute_instance_example_type|Show machine type|ERROR|✔||
 
 ## Building the plugin
 

go.mod

@@ -1,4 +1,4 @@
-module github.com/terraform-linters/tflint-ruleset-template
+module github.com/terraform-linters/tflint-ruleset-google
 
 go 1.13
 

main.go

@@ -1,18 +1,18 @@
 package main
 
 import (
-	"github.com/terraform-linters/tflint-ruleset-template/rules"
 	"github.com/terraform-linters/tflint-plugin-sdk/plugin"
 	"github.com/terraform-linters/tflint-plugin-sdk/tflint"
+	"github.com/terraform-linters/tflint-ruleset-google/rules"
 )
 
 func main() {
 	plugin.Serve(&plugin.ServeOpts{
 		RuleSet: tflint.RuleSet{
-			Name:    "template",
+			Name:    "google",
 			Version: "0.1.0",
 			Rules: []tflint.Rule{
-				rules.NewAwsInstanceExampleTypeRule(),
+				rules.NewGoogleComputeInstanceExampleTypeRule(),
 			},
 		},
 	})

rules/google_compute_instance_example_type.go

@@ -0,0 +1,53 @@
+package rules
+
+import (
+	"fmt"
+
+	hcl "github.com/hashicorp/hcl/v2"
+	"github.com/terraform-linters/tflint-plugin-sdk/tflint"
+)
+
+// GoogleComputeInstanceExampleTypeRule checks whether ...
+type GoogleComputeInstanceExampleTypeRule struct{}
+
+// NewGoogleComputeInstanceExampleTypeRule returns a new rule
+func NewGoogleComputeInstanceExampleTypeRule() *GoogleComputeInstanceExampleTypeRule {
+	return &GoogleComputeInstanceExampleTypeRule{}
+}
+
+// Name returns the rule name
+func (r *GoogleComputeInstanceExampleTypeRule) Name() string {
+	return "google_compute_instance_example_type"
+}
+
+// Enabled returns whether the rule is enabled by default
+func (r *GoogleComputeInstanceExampleTypeRule) Enabled() bool {
+	return true
+}
+
+// Severity returns the rule severity
+func (r *GoogleComputeInstanceExampleTypeRule) Severity() string {
+	return tflint.ERROR
+}
+
+// Link returns the rule reference link
+func (r *GoogleComputeInstanceExampleTypeRule) Link() string {
+	return ""
+}
+
+// Check checks whether ...
+func (r *GoogleComputeInstanceExampleTypeRule) Check(runner tflint.Runner) error {
+	return runner.WalkResourceAttributes("google_compute_instance", "machine_type", func(attribute *hcl.Attribute) error {
+		var machineType string
+		err := runner.EvaluateExpr(attribute.Expr, &machineType)
+
+		return runner.EnsureNoError(err, func() error {
+			return runner.EmitIssue(
+				r,
+				fmt.Sprintf("machine type is %s", machineType),
+				attribute.Expr.Range(),
+				tflint.Metadata{Expr: attribute.Expr},
+			)
+		})
+	})
+}

rules/aws_instance_example_type_test.go → rules/google_compute_instance_example_type_test.go

@@ -7,7 +7,7 @@ import (
 	"github.com/terraform-linters/tflint-plugin-sdk/helper"
 )
 
-func Test_AwsInstanceExampleType(t *testing.T) {
+func Test_GoogleComputeInstanceExampleType(t *testing.T) {
 	cases := []struct {
 		Name     string
 		Content  string
@@ -16,24 +16,24 @@ func Test_AwsInstanceExampleType(t *testing.T) {
 		{
 			Name: "issue found",
 			Content: `
-resource "aws_instance" "web" {
-    instance_type = "t2.micro"
+resource "google_compute_instance" "vm_instance" {
+    machine_type = "f1-micro"
 }`,
 			Expected: helper.Issues{
 				{
-					Rule:    NewAwsInstanceExampleTypeRule(),
-					Message: "instance type is t2.micro",
+					Rule:    NewGoogleComputeInstanceExampleTypeRule(),
+					Message: "machine type is f1-micro",
 					Range: hcl.Range{
 						Filename: "resource.tf",
-						Start:    hcl.Pos{Line: 3, Column: 21},
-						End:      hcl.Pos{Line: 3, Column: 31},
+						Start:    hcl.Pos{Line: 3, Column: 20},
+						End:      hcl.Pos{Line: 3, Column: 30},
 					},
 				},
 			},
 		},
 	}
 
-	rule := NewAwsInstanceExampleTypeRule()
+	rule := NewGoogleComputeInstanceExampleTypeRule()
 
 	for _, tc := range cases {
 		runner := helper.TestRunner(t, map[string]string{"resource.tf": tc.Content})