refactor: drop support for versions below Node.js 8 (#125)

BREAKING CHANGE: drop support for Node.js < 8

.travis.yml

@@ -1,13 +1,9 @@
 language: node_js
 node_js:
-  - '4.7'
-  - '4.8'
-  - '5.6'
-  - '5.7'
-  - '6'
-  - 'lts/*'
-# nodejs 11.11.X was failing with this https://travis-ci.org/moxystudio/node-proper-lockfile/jobs/503161746#L469
-#  - 'node'
+  - 8
+  - 9
+  - 10
+  - 12
 after_success:
-  - "npm i codecov"
-  - "node_modules/.bin/codecov"
+  - 'npm i codecov'
+  - 'node_modules/.bin/codecov'

README.md

@@ -21,8 +21,11 @@ A cross platform solution to node's spawn and spawnSync.
 
 ## Installation
 
+Node.js version 8 and up:
 `$ npm install cross-spawn`
 
+Node.js version 7 and under:
+`$ npm install cross-spawn@6`
 
 ## Why
 

appveyor.yml

@@ -4,21 +4,12 @@
 init:
   - git config --global core.autocrlf input
 
-# If we are running on Node <6, we must install npm v3 otherwise
-# there will be intermitent errors when running `npm install`
 environment:
   matrix:
-    - nodejs_version: 4.7
-      npm_version: ^3.0.0
-    - nodejs_version: 4.8
-      npm_version: ^3.0.0
-    - nodejs_version: 5.6
-      npm_version: ^3.0.0
-    - nodejs_version: 5.7
-      npm_version: ^3.0.0
-    - nodejs_version: 6
     - nodejs_version: 8
     - nodejs_version: 9
+    - nodejs_version: 10
+    - nodejs_version: 12
 
 install:
   - ps: Install-Product node $env:nodejs_version

lib/parse.js

@@ -1,19 +1,14 @@
 'use strict';
 
 const path = require('path');
-const niceTry = require('nice-try');
 const resolveCommand = require('./util/resolveCommand');
 const escape = require('./util/escape');
 const readShebang = require('./util/readShebang');
-const semver = require('semver');
 
 const isWin = process.platform === 'win32';
 const isExecutableRegExp = /\.(?:com|exe)$/i;
 const isCmdShimRegExp = /node_modules[\\/].bin[\\/][^\\/]+\.cmd$/i;
 
-// `options.shell` is supported in Node ^4.8.0, ^5.7.0 and >= 6.0.0
-const supportsShellOption = niceTry(() => semver.satisfies(process.version, '^4.8.0 || ^5.7.0 || >= 6.0.0', true)) || false;
-
 function detectShebang(parsed) {
     parsed.file = resolveCommand(parsed);
 
@@ -67,35 +62,6 @@ function parseNonShell(parsed) {
     return parsed;
 }
 
-function parseShell(parsed) {
-    // If node supports the shell option, there's no need to mimic its behavior
-    if (supportsShellOption) {
-        return parsed;
-    }
-
-    // Mimic node shell option
-    // See https://github.com/nodejs/node/blob/b9f6a2dc059a1062776133f3d4fd848c4da7d150/lib/child_process.js#L335
-    const shellCommand = [parsed.command].concat(parsed.args).join(' ');
-
-    if (isWin) {
-        parsed.command = typeof parsed.options.shell === 'string' ? parsed.options.shell : process.env.comspec || 'cmd.exe';
-        parsed.args = ['/d', '/s', '/c', `"${shellCommand}"`];
-        parsed.options.windowsVerbatimArguments = true; // Tell node's spawn that the arguments are already escaped
-    } else {
-        if (typeof parsed.options.shell === 'string') {
-            parsed.command = parsed.options.shell;
-        } else if (process.platform === 'android') {
-            parsed.command = '/system/bin/sh';
-        } else {
-            parsed.command = '/bin/sh';
-        }
-
-        parsed.args = ['-c', shellCommand];
-    }
-
-    return parsed;
-}
-
 function parse(command, args, options) {
     // Normalize arguments, similar to nodejs
     if (args && !Array.isArray(args)) {
@@ -119,7 +85,7 @@ function parse(command, args, options) {
     };
 
     // Delegate further parsing to shell or non-shell
-    return options.shell ? parseShell(parsed) : parseNonShell(parsed);
+    return options.shell ? parsed : parseNonShell(parsed);
 }
 
 module.exports = parse;

lib/util/readShebang.js

@@ -6,16 +6,7 @@ const shebangCommand = require('shebang-command');
 function readShebang(command) {
     // Read the first 150 bytes from the file
     const size = 150;
-    let buffer;
-
-    if (Buffer.alloc) {
-        // Node.js v4.5+ / v5.10+
-        buffer = Buffer.alloc(size);
-    } else {
-        // Old Node.js API
-        buffer = new Buffer(size);
-        buffer.fill(0); // zero-fill
-    }
+    const buffer = Buffer.alloc(size);
 
     let fd;
 

package.json

@@ -48,9 +48,7 @@
     ]
   },
   "dependencies": {
-    "nice-try": "^1.0.4",
     "path-key": "^2.0.1",
-    "semver": "^5.5.0",
     "shebang-command": "^1.2.0",
     "which": "^1.2.9"
   },
@@ -71,6 +69,6 @@
     "standard-version": "^4.2.0"
   },
   "engines": {
-    "node": ">=4.8"
+    "node": ">= 8"
   }
 }