feat: get rid of cjs module

BREAKING CHANGE: only provide esm module

.markdown-doctest-setup.js

@@ -1,6 +1,5 @@
 module.exports = {
   require: {
-    'config-expander': require('./dist/expander')
   },
   globals: {
     'process' : process

README.md

@@ -23,8 +23,10 @@ Expands expressions in config files
 
 ## file.js
 
+<!-- skip-example -->
+
 ```js
-const { expand } = require('config-expander');
+import { expand } =  from 'config-expander';
 
 // expanding hole expressions at the value position (result key is a number)
 expand({ key: '${value + 1}' }, { constants: { value: 77 } }).then(r =>

src/functions.js → src/functions.mjs

@@ -3,9 +3,8 @@ import { expand } from "./expander";
 import { promisify } from "util";
 import { spawn } from "child_process";
 import { dirname, resolve } from "path";
-const { readFile } = require("fs").promises;
-const { createCipher, createDecipher } = require("crypto");
-//import { createCipher, createDecipher } from "crypto";
+import fs from 'fs';
+import crypto from "crypto";
 
 /**
  * @typedef {Object} Value
@@ -35,7 +34,7 @@ export const functions = {
     arguments: ["string"],
     returns: "buffer",
     apply: (context, args) =>
-      createValue(readFile(resolve(context.constants.basedir, args[0].value)))
+      createValue(fs.promises.readFile(resolve(context.constants.basedir, args[0].value)))
   },
   resolve: {
     arguments: ["string"],
@@ -56,7 +55,7 @@ export const functions = {
       const file = resolve(context.constants.basedir, args[0].value);
 
       return createValue(
-        readFile(file).then(data => {
+        fs.promises.readFile(file).then(data => {
           const json = JSON.parse(data);
           return expand(
             json,
@@ -184,7 +183,7 @@ export const functions = {
     returns: "string",
     apply: (context, args) => {
       const [key, plaintext] = args.map(a => a.value);
-      const encipher = createCipher("aes-256-cbc", key);
+      const encipher = crypto.createCipher("aes-256-cbc", key);
       let encryptdata = encipher.update(plaintext, "utf8", "binary");
       encryptdata += encipher.final("binary");
       return createValue(Buffer.from(encryptdata, "binary").toString("base64"));
@@ -203,7 +202,7 @@ export const functions = {
     apply: (context, args) => {
       let [key, encryptdata] = args.map(a => a.value);
       encryptdata = Buffer.from(encryptdata, "base64").toString("binary");
-      const decipher = createDecipher("aes-256-cbc", key);
+      const decipher = crypto.createDecipher("aes-256-cbc", key);
       let decoded = decipher.update(encryptdata, "binary", "utf8");
       decoded += decipher.final("utf8");
       return createValue(decoded);

tests/basics-test.js → tests/basics-test.mjs

@@ -1,5 +1,9 @@
 import test from "ava";
 import { expand, createValue } from "../src/expander";
+import { dirname } from "path";
+import { fileURLToPath } from "url";
+
+const here = dirname(fileURLToPath(import.meta.url));
 
 test("null expansion", async t => {
   t.deepEqual(
@@ -131,7 +135,7 @@ test("function promise arg", async t =>
       "${substring(string(document('../tests/fixtures/short.txt')),0,4)}",
       {
         constants: {
-          basedir: __dirname
+          basedir: here
         }
       }
     ),
@@ -144,7 +148,7 @@ test("two promises binop", async t =>
       "${document('../tests/fixtures/short.txt') + document('../tests/fixtures/short2.txt')}",
       {
         constants: {
-          basedir: __dirname
+          basedir: here
         }
       }
     )).toString(),
@@ -155,7 +159,7 @@ test("left only promise binop", async t =>
   t.is(
     (await expand("${document('../tests/fixtures/short.txt') + 'XX'}", {
       constants: {
-        basedir: __dirname
+        basedir: here
       }
     })).toString(),
     "line 1\nXX"
@@ -197,7 +201,7 @@ test("object paths with promise", async t =>
   t.deepEqual(
     await expand("${include('../tests/fixtures/with_sub.json').sub}", {
       constants: {
-        basedir: __dirname,
+        basedir: here,
         c1: "vc1"
       }
     }),

tests/files-test.js → tests/files-test.mjs

@@ -1,6 +1,9 @@
 import test from "ava";
 import { expand } from "../src/expander";
-import { join } from "path";
+import { join, dirname } from "path";
+import { fileURLToPath } from "url";
+
+const here = dirname(fileURLToPath(import.meta.url));
 
 test("has file content", async t =>
   t.deepEqual(
@@ -12,7 +15,7 @@ test("has file content", async t =>
         },
         {
           constants: {
-            basedir: join(__dirname, "..", "tests", "fixtures")
+            basedir: join(here, "..", "tests", "fixtures")
           }
         }
       )
@@ -24,17 +27,17 @@ test("has file content #2", async t =>
   t.is(
     await expand("${resolve('fixtures')}", {
       constants: {
-        basedir: join(__dirname, "..", "tests")
+        basedir: join(here, "..", "tests")
       }
     }),
-    join(__dirname, "..", "tests", "fixtures")
+    join(here, "..", "tests", "fixtures")
   ));
 
 test("can include", async t =>
   t.deepEqual(
     await expand("${include('../tests/fixtures/other.json')}", {
       constants: {
-        basedir: __dirname,
+        basedir: here,
         c1: "x"
       }
     }),
@@ -48,7 +51,7 @@ test("can nest includes", async t =>
     (await expand("${include('../tests/fixtures/first.json')}", {
       constants: {
         nameOfTheOther: "other.json",
-        basedir: __dirname
+        basedir: here
       }
     })).first_key,
     {
@@ -61,7 +64,7 @@ test("include missing", async t => {
     async () => expand("${include('../tests/fixtures/missing.json')}"),
     {
       message: `ENOENT: no such file or directory, open '${join(
-        __dirname,
+        here,
         "..",
         "../tests/fixtures/missing.json"
       )}'`