feature(putout) add merge

packages/putout/bin/putout.js

@@ -25,12 +25,11 @@ const cwd = process.cwd();
 const once = require('once');
 const glob = require('glob');
 const tryCatch = require('try-catch');
-const deepmerge = require('deepmerge');
-const arrayUnion = require('array-union');
 
 const defaultOptions = require('../putout.json');
 
 const putout = require('..');
+const {merge} = putout;
 const parseMatch = require('../lib/parse-match');
 const getRelativePath = require('../lib/get-relative-path');
 const report = require('../lib/report')();
@@ -246,13 +245,6 @@ function exit(e) {
     process.exit(1);
 }
 
-function merge(...args) {
-    const arrayMerge = (a, b) => arrayUnion(b, a);
-    return deepmerge.all(args, {
-        arrayMerge,
-    });
-}
-
 function getOptions(cwd) {
     const putoutPath = findUp.sync('.putout.json', {
         cwd,

packages/putout/lib/merge.js

@@ -0,0 +1,13 @@
+'use strict';
+
+const deepmerge = require('deepmerge');
+const arrayUnion = require('array-union');
+
+const arrayMerge = (a, b) => arrayUnion(b, a);
+
+module.exports = (...args) => {
+    return deepmerge.all(args, {
+        arrayMerge,
+    });
+}
+

packages/putout/lib/merge.spec.js

@@ -0,0 +1,29 @@
+'use strict';
+
+const test = require('supertape');
+const merge = require('./merge');
+
+test('merge', (t) => {
+    const defaultConfig = {
+        plugins: [
+            'remove-unused-variables',
+        ]
+    };
+
+    const result = merge(defaultConfig, {
+        plugins: [
+            'extract-sequence-expressions',
+        ]
+    });
+
+    const expected = {
+        plugins: [
+            'extract-sequence-expressions',
+            'remove-unused-variables',
+        ]
+    };
+
+    t.deepEqual(result, expected);
+    t.end();
+});
+

packages/putout/lib/putout.js

@@ -65,7 +65,7 @@ module.exports = (source, opts) => {
 
     const places = transform(ast, source, opts);
     const printed = print(ast);
-    const code = fixStrictMode(`${shebang}${printed}`);
+    const code = `${shebang}${printed}`;
 
     return {
         code,
@@ -135,12 +135,17 @@ function print(ast) {
         objectCurlySpacing: false,
     };
 
-    return recast.print(ast, printOptions).code;
+    const printed = recast.print(ast, printOptions).code;
+    const code = fixStrictMode(printed);
+
+    return code;
 }
 
 module.exports.traverse = traverse;
 module.exports.types = types;
 module.exports.template = template;
 module.exports.generate = generate;
 module.exports.initReport = require('./report');
+module.exports.merge = require('./merge');
 module.exports.operate = require('@putout/operate');
+