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 }

dist/index.js

@@ -36,10 +36,13 @@ #! /usr/bin/env node
 const rewriter = new rewriter_1.Rewriter(config);
-rewriter.rewrite(document).then(result => {
+rewriter
+    .rewrite(document)
+    .then(result => {
     const errors = utils_1.validateOutput(document, result);
     if (errors.length) {
-        throw new Error(`Validation errors found in result:\n${errors.join("\n")}`);
+        throw new Error(`Validation errors found in result:\n${errors.join('\n')}`);
     }
     console.info(`Writing .env file to ${args.outputdir}/.env`);
     utils_1.writeFile(result, args.outputdir);
-}).catch((error) => {
+})
+    .catch((error) => {
     console.error(`Could not write .env file: ${error.stack}`);
@@ -46,0 +49,0 @@ process.exit(1);

dist/resolvers.js

@@ -54,4 +54,3 @@ "use strict";
         const promisified = bluebird_1.promisify(credstash.getSecret, { context: credstash });
-        return promisified({ name: argument })
-            .catch((error) => {
+        return promisified({ name: argument }).catch((error) => {
             console.warn(`Could not load value ${argument} from credstash: ${error}`);
@@ -58,0 +57,0 @@ return undefined;

dist/rewriter.js

@@ -11,2 +11,3 @@ "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
+const util_1 = require("util");
 class Rewriter {
@@ -46,8 +47,8 @@ constructor(config) {
                         }
-                        const innerValue = matchResults ? matchResults[2] : value;
-                        let innerResult = yield resolver(innerValue, this.config);
-                        if (!innerResult) {
-                            throw new Error(`Resolver ${resolverName} didn't return any value`);
+                        const argument = matchResults ? matchResults[2] : value;
+                        let resolved = yield resolver(argument, this.config);
+                        const rewrittenValue = yield this.rewriteValue(resolved);
+                        if (!util_1.isNullOrUndefined(rewrittenValue)) {
+                            result += rewrittenValue;
                         }
-                        result += yield this.rewriteValue(innerResult);
                         capture = '';
@@ -54,0 +55,0 @@ }

dist/utils.js

@@ -27,3 +27,3 @@ "use strict";
         if (!input[key].optional) {
-            if (!(key in output) || output[key] === undefined) {
+            if (!(key in output) || output[key] === undefined || output[key] === '') {
                 errors.push(`${key} is a required variable but is not specified in result`);
@@ -30,0 +30,0 @@ }

package.json

 {
   "name": "dotenvi",
-  "version": "0.6.0",
+  "version": "0.6.1",
   "author": "Ben Ross",
@@ -14,3 +14,4 @@ "license": "MIT",
     "precommit": "lint-staged",
-    "release": "semantic-release"
+    "release": "semantic-release",
+    "example": "pushd example && IA_ENV=test node ../dist/index.js -f env.yml -s development && popd"
   },
@@ -17,0 +18,0 @@ "bin": {

src/index.ts

@@ -34,3 +34,3 @@ #! /usr/bin/env node
 try {
-  const contents = fs.readFileSync(args.file, 'utf8')
+  const contents = fs.readFileSync(args.file, 'utf8');
   document = parse(contents, args.stage);
@@ -43,12 +43,15 @@ } catch (error) {
 const rewriter = new Rewriter(config);
-rewriter.rewrite(document).then(result => {
-  const errors = validateOutput(document, result);
-  if (errors.length) {
-    throw new Error(`Validation errors found in result:\n${errors.join("\n")}`);
-  }
-  console.info(`Writing .env file to ${args.outputdir}/.env`);
-  writeFile(result, args.outputdir);
-}).catch((error: Error) => {
-  console.error(`Could not write .env file: ${error.stack}`);
-  process.exit(1);
-});
+rewriter
+  .rewrite(document)
+  .then(result => {
+    const errors = validateOutput(document, result);
+    if (errors.length) {
+      throw new Error(`Validation errors found in result:\n${errors.join('\n')}`);
+    }
+    console.info(`Writing .env file to ${args.outputdir}/.env`);
+    writeFile(result, args.outputdir);
+  })
+  .catch((error: Error) => {
+    console.error(`Could not write .env file: ${error.stack}`);
+    process.exit(1);
+  });

src/inputParser.test.js

@@ -39,3 +39,2 @@ const { parse } = require('./inputParser');
 
-
   it('Parses invalid document with bad stage', () => {
@@ -42,0 +41,0 @@ const contents = `

src/resolvers.ts

@@ -11,6 +11,4 @@ import * as AWS from 'aws-sdk';
 
-
 export const resolvers: ResolverMap = {
   cft: async (argument: string, config: Config) => {
-
     if (!AWS.config.region) {
@@ -31,4 +29,3 @@ AWS.config.update({ region: config.awsRegion });
     if (stack.Stacks.length == 0) {
-      console.warn(
-        `Could not locate stack with name ${parsedArgument[0]} when parsing cft reference ${argument}`);
+      console.warn(`Could not locate stack with name ${parsedArgument[0]} when parsing cft reference ${argument}`);
       return undefined;
@@ -57,8 +54,7 @@ }
     const promisified = promisify<string, object>(credstash.getSecret, { context: credstash });
-    return promisified({ name: argument })
-      .catch((error: Error): string => {
-        console.warn(`Could not load value ${argument} from credstash: ${error}`);
-        return undefined;
-      });
+    return promisified({ name: argument }).catch((error: Error): string => {
+      console.warn(`Could not load value ${argument} from credstash: ${error}`);
+      return undefined;
+    });
   }
 };

src/rewriter.test.js

 const { Rewriter } = require('./rewriter');
 const { resolvers } = require('./resolvers');
 
-
 describe('Rewriter', () => {
   it('Rewrites constants', () => {
     const document = {
-      'explicit': {
-        'value': '${constant:hello}'
+      explicit: {
+        value: '${constant:hello}'
       },
-      'implicit': {
-        'value': 'hello'
+      implicit: {
+        value: 'hello'
       }
@@ -17,3 +16,3 @@ };
     const rewriter = new Rewriter({ resolvers: resolvers });
-    return rewriter.rewrite(document).then((output) => {
+    return rewriter.rewrite(document).then(output => {
       expect(output['explicit']).toBe(output['implicit']);
@@ -26,4 +25,4 @@ });
     const document = {
-      'test': {
-        'value': '${env:TEST}'
+      test: {
+        value: '${env:TEST}'
       }
@@ -33,3 +32,3 @@ };
     const rewriter = new Rewriter({ resolvers: resolvers });
-    return rewriter.rewrite(document).then((output) => {
+    return rewriter.rewrite(document).then(output => {
       expect(output['test']).toBe('hello');
@@ -42,4 +41,4 @@ });
     const document = {
-      'test': {
-        'value': 'test-${env:TEST}-test'
+      test: {
+        value: 'test-${env:TEST}-test'
       }
@@ -49,3 +48,3 @@ };
     const rewriter = new Rewriter({ resolvers: resolvers });
-    return rewriter.rewrite(document).then((output) => {
+    return rewriter.rewrite(document).then(output => {
       expect(output['test']).toBe('test-hello-test');
@@ -59,4 +58,4 @@ });
     const document = {
-      'test': {
-        'value': '${env:RECURSIVE_OUTER}'
+      test: {
+        value: '${env:RECURSIVE_OUTER}'
       }
@@ -66,3 +65,3 @@ };
     const rewriter = new Rewriter({ resolvers: resolvers });
-    return rewriter.rewrite(document).then((output) => {
+    return rewriter.rewrite(document).then(output => {
       expect(output['test']).toBe('test');
@@ -72,10 +71,9 @@ });
 
-
   it('Handles complex recursive rewrites', () => {
     process.env['RECURSIVE_OUTER2'] = '${env:RECURSIVE_MIDDLE2}-test';
-    process.env['RECURSIVE_MIDDLE2'] = 'foo${env:RECURSIVE_INNER2}bar${env:RECURSIVE_INNER2}'
+    process.env['RECURSIVE_MIDDLE2'] = 'foo${env:RECURSIVE_INNER2}bar${env:RECURSIVE_INNER2}';
     process.env['RECURSIVE_INNER2'] = 'test';
     const document = {
-      'test': {
-        'value': '${env:RECURSIVE_OUTER2}'
+      test: {
+        value: '${env:RECURSIVE_OUTER2}'
       }
@@ -85,6 +83,20 @@ };
     const rewriter = new Rewriter({ resolvers: resolvers });
-    return rewriter.rewrite(document).then((output) => {
+    return rewriter.rewrite(document).then(output => {
       expect(output['test']).toBe('footestbartest-test');
     });
-  })
+  });
+
+  it('Supports optionals', () => {
+    const document = {
+      test: {
+        value: '${env:OPTIONAL}',
+        optional: true
+      }
+    };
+
+    const rewriter = new Rewriter({ resolvers: resolvers });
+    return rewriter.rewrite(document).then(output => {
+      expect(output['test']).toBe('');
+    });
+  });
 });

src/rewriter.ts

 import { Document, InputDocument, Config, Primitive } from './types';
+import { isNullOrUndefined } from 'util';
 
 export class Rewriter {
-  constructor(private config: Config) { }
+  constructor(private config: Config) {}
 
@@ -34,8 +35,8 @@ async rewrite(document: InputDocument): Promise<Document> {
           }
-          const innerValue = matchResults ? matchResults[2] : value;
-          let innerResult = await resolver(innerValue, this.config);
-          if (!innerResult) {
-            throw new Error(`Resolver ${resolverName} didn't return any value`);
+          const argument = matchResults ? matchResults[2] : value;
+          let resolved = await resolver(argument, this.config);
+          const rewrittenValue = await this.rewriteValue(resolved);
+          if (!isNullOrUndefined(rewrittenValue)) {
+            result += rewrittenValue;
           }
-          result += await this.rewriteValue(innerResult);
           capture = '';
@@ -42,0 +43,0 @@ } else if (capture) {

src/types.ts

 export type ResolverFunction = (arg: string, config: Config) => Promise<string>;
 export type ResolverMap = {
-  [name: string]: ResolverFunction
+  [name: string]: ResolverFunction;
 };
 
 export type Primitive = string | number | boolean;
-export type Document = { [name: string]: Primitive }
+export type Document = { [name: string]: Primitive };
 
@@ -12,4 +12,4 @@ export class InputDocument {
     value: Primitive;
-    optional?: boolean
-  }
+    optional?: boolean;
+  };
 }
@@ -23,3 +23,3 @@
   awsRegion: string;
-  resolvers: ResolverMap
+  resolvers: ResolverMap;
 }

src/utils.test.js

@@ -6,6 +6,6 @@ const { validateOutput } = require('./utils');
     const input = {
-      'variable': {
+      variable: {
         value: 'constant'
       },
-      'optional': {
+      optional: {
         value: undefined,
@@ -16,3 +16,3 @@ optional: true
     const output = {
-      'variable': 'constant',
+      variable: 'constant'
     };
@@ -25,8 +25,7 @@ const errors = validateOutput(input, output);
     const input = {
-      'environment': {
+      environment: {
         value: '${env:this_should_not_be_defined}'
       }
     };
-    const output = {
-    }
+    const output = {};
     const errors = validateOutput(input, output);
@@ -38,3 +37,3 @@ expect(errors.length).toBeGreaterThan(0);
     const input = {
-      'environment': {
+      environment: {
         value: '${env:this_should_not_be_defined}',
@@ -44,4 +43,3 @@ optional: true
     };
-    const output = {
-    }
+    const output = {};
     const errors = validateOutput(input, output);
@@ -48,0 +46,0 @@ expect(errors.length).toBe(0);

src/utils.ts

@@ -23,3 +23,2 @@ import * as fs from 'fs';
 
-
 export function validateOutput(input: InputDocument, output: Document): string[] {
@@ -30,3 +29,3 @@ const errors = [];
     if (!input[key].optional) {
-      if (!(key in output) || output[key] === undefined) {
+      if (!(key in output) || output[key] === undefined || output[key] === '') {
         errors.push(`${key} is a required variable but is not specified in result`);
@@ -39,3 +38,2 @@ }
 
-
 export function loadConfig(): Config {
@@ -42,0 +40,0 @@ let config: Config = new Config();

No alert changes

Improved metrics

Lines of code

1352

increased by1.2%

Worsened metrics

Total package byte prevSize

385718

decreased by-0.04%

No dependency changes