Merge pull request #7 from nekonomokochan/feature/issue3

Implement a function to create provider.tf

.gitignore

@@ -69,3 +69,4 @@ dist
 
 # output terraform config files
 backend.tf
+provider.tf

README.md

@@ -15,6 +15,8 @@ Create terraform config files
 
 ## Use With TypeScript
 
+### createS3Backend
+
 ```typescript
 import { createS3Backend } from "@nekonomokochan/terraform-config-creator";
 
@@ -89,8 +91,39 @@ data "terraform_remote_state" "bastion" {
 }
 ```
 
+### createAwsProvider
+
+```typescript
+import { createAwsProvider } from "@nekonomokochan/terraform-config-creator";
+
+(async () => {
+  const params = {
+    outputPath: "./",
+    awsProviderParams: [
+      {
+        version: "=1.54.0",
+        region: "ap-northeast-1",
+        profile: "nekochans-dev"
+      },
+      {
+        version: "=1.54.0",
+        region: "us-east-1",
+        profile: "nekochans-dev",
+        alias: "us_east_1"
+      }
+    ]
+  };
+
+  await createAwsProvider(params);
+})();
+```
+
+`provider.tf` is created in your current directory.
+
 ## Use With JavaScript
 
+### createS3Backend
+
 ```javascript
 (async () => {
   "use strict";
@@ -132,5 +165,36 @@ data "terraform_remote_state" "bastion" {
 
 `backend.tf` is created in your current directory.
 
+### createAwsProvider
+
+```javascript
+(async () => {
+  "use strict";
+
+  const terraformConfigCreator = require("@nekonomokochan/terraform-config-creator");
+
+  const params = {
+    outputPath: "./",
+    awsProviderParams: [
+      {
+        version: "=1.54.0",
+        region: "ap-northeast-1",
+        profile: "nekochans-dev"
+      },
+      {
+        version: "=1.54.0",
+        region: "us-east-1",
+        profile: "nekochans-dev",
+        alias: "us_east_1"
+      }
+    ]
+  };
+
+  await terraformConfigCreator.createAwsProvider(params);
+})();
+```
+
+`provider.tf` is created in your current directory.
+
 # License
 MIT

src/createAwsProvider.ts

@@ -0,0 +1,45 @@
+import { promisify } from "util";
+import fs from "fs";
+
+interface IProvider {
+  version: string;
+  region: string;
+  profile: string;
+  alias?: string;
+}
+
+interface ICreateAwsProviderParams {
+  outputPath: string;
+  awsProviderParams: IProvider[];
+}
+
+const createProvider = (provider: IProvider): string => {
+  return `provider "aws" {
+  version = "${provider.version}"
+  region  = "${provider.region}"
+  profile = "${provider.profile}"
+}`;
+};
+
+const createProviderWithAlias = (provider: IProvider): string => {
+  return `provider "aws" {
+  version = "${provider.version}"
+  region  = "${provider.region}"
+  profile = "${provider.profile}"
+  alias   = "${provider.alias}"
+}`;
+};
+
+export const createAwsProvider = async (params: ICreateAwsProviderParams) => {
+  const writeFile = promisify(fs.writeFile);
+  let outputString = "";
+
+  params.awsProviderParams.map((provider: IProvider) => {
+    outputString +=
+      provider.alias === undefined
+        ? `${createProvider(provider)}\n\n`
+        : `${createProviderWithAlias(provider)}\n\n`;
+  });
+
+  await writeFile(`${params.outputPath}provider.tf`, outputString);
+};

src/index.ts

@@ -1 +1,2 @@
 export * from "./createS3Backend";
+export * from "./createAwsProvider";

test/integration/createAwsProvider.spec.ts

@@ -0,0 +1,42 @@
+import { createAwsProvider } from "../../src/index";
+import fs from "fs";
+
+describe("createAwsProvider.integrationTest", () => {
+  it("should be able to create a provider.tf", async () => {
+    const params = {
+      outputPath: "./",
+      awsProviderParams: [
+        {
+          version: "=1.54.0",
+          region: "ap-northeast-1",
+          profile: "nekochans-dev"
+        },
+        {
+          version: "=1.54.0",
+          region: "us-east-1",
+          profile: "nekochans-dev",
+          alias: "us_east_1"
+        }
+      ]
+    };
+
+    const expected = `provider "aws" {
+  version = "=1.54.0"
+  region  = "ap-northeast-1"
+  profile = "nekochans-dev"
+}
+
+provider "aws" {
+  version = "=1.54.0"
+  region  = "us-east-1"
+  profile = "nekochans-dev"
+  alias   = "us_east_1"
+}\n\n`;
+
+    await createAwsProvider(params);
+
+    const resultString = fs.readFileSync("./provider.tf").toString();
+
+    expect(resultString).toEqual(expected);
+  });
+});