diff options
Diffstat (limited to 'deps/npm/node_modules/libnpx/node_modules/yargs/node_modules/os-locale/node_modules/execa/node_modules/cross-spawn/lib/parse.js')
-rw-r--r-- | deps/npm/node_modules/libnpx/node_modules/yargs/node_modules/os-locale/node_modules/execa/node_modules/cross-spawn/lib/parse.js | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/deps/npm/node_modules/libnpx/node_modules/yargs/node_modules/os-locale/node_modules/execa/node_modules/cross-spawn/lib/parse.js b/deps/npm/node_modules/libnpx/node_modules/yargs/node_modules/os-locale/node_modules/execa/node_modules/cross-spawn/lib/parse.js new file mode 100644 index 0000000000..77cbb83d2d --- /dev/null +++ b/deps/npm/node_modules/libnpx/node_modules/yargs/node_modules/os-locale/node_modules/execa/node_modules/cross-spawn/lib/parse.js @@ -0,0 +1,140 @@ +'use strict'; + +var fs = require('fs'); +var LRU = require('lru-cache'); +var resolveCommand = require('./resolveCommand'); +var hasBrokenSpawn = require('./hasBrokenSpawn'); + +var isWin = process.platform === 'win32'; +var shebangCache = new LRU({ max: 50, maxAge: 30 * 1000 }); // Cache just for 30sec + +function readShebang(command) { + var buffer; + var fd; + var match; + var shebang; + + // Check if it is in the cache first + if (shebangCache.has(command)) { + return shebangCache.get(command); + } + + // Read the first 150 bytes from the file + buffer = new Buffer(150); + + try { + fd = fs.openSync(command, 'r'); + fs.readSync(fd, buffer, 0, 150, 0); + fs.closeSync(fd); + } catch (e) { /* empty */ } + + // Check if it is a shebang + match = buffer.toString().trim().match(/#!(.+)/i); + + if (match) { + shebang = match[1].replace(/\/usr\/bin\/env\s+/i, ''); // Remove /usr/bin/env + } + + // Store the shebang in the cache + shebangCache.set(command, shebang); + + return shebang; +} + +function escapeArg(arg, quote) { + // Convert to string + arg = '' + arg; + + // If we are not going to quote the argument, + // escape shell metacharacters, including double and single quotes: + if (!quote) { + arg = arg.replace(/([\(\)%!\^<>&|;,"'\s])/g, '^$1'); + } else { + // Sequence of backslashes followed by a double quote: + // double up all the backslashes and escape the double quote + arg = arg.replace(/(\\*)"/g, '$1$1\\"'); + + // Sequence of backslashes followed by the end of the string + // (which will become a double quote later): + // double up all the backslashes + arg = arg.replace(/(\\*)$/, '$1$1'); + + // All other backslashes occur literally + + // Quote the whole thing: + arg = '"' + arg + '"'; + } + + return arg; +} + +function escapeCommand(command) { + // Do not escape if this command is not dangerous.. + // We do this so that commands like "echo" or "ifconfig" work + // Quoting them, will make them unaccessible + return /^[a-z0-9_-]+$/i.test(command) ? command : escapeArg(command, true); +} + +function requiresShell(command) { + return !/\.(?:com|exe)$/i.test(command); +} + +function parse(command, args, options) { + var shebang; + var applyQuotes; + var file; + var original; + var shell; + + // Normalize arguments, similar to nodejs + if (args && !Array.isArray(args)) { + options = args; + args = null; + } + + args = args ? args.slice(0) : []; // Clone array to avoid changing the original + options = options || {}; + original = command; + + if (isWin) { + // Detect & add support for shebangs + file = resolveCommand(command); + file = file || resolveCommand(command, true); + shebang = file && readShebang(file); + shell = options.shell || hasBrokenSpawn; + + if (shebang) { + args.unshift(file); + command = shebang; + shell = shell || requiresShell(resolveCommand(shebang) || resolveCommand(shebang, true)); + } else { + shell = shell || requiresShell(file); + } + + if (shell) { + // Escape command & arguments + applyQuotes = (command !== 'echo'); // Do not quote arguments for the special "echo" command + command = escapeCommand(command); + args = args.map(function (arg) { + return escapeArg(arg, applyQuotes); + }); + + // Use cmd.exe + args = ['/s', '/c', '"' + command + (args.length ? ' ' + args.join(' ') : '') + '"']; + command = process.env.comspec || 'cmd.exe'; + + // Tell node's spawn that the arguments are already escaped + options.windowsVerbatimArguments = true; + } + } + + return { + command: command, + args: args, + options: options, + file: file, + original: original, + }; +} + +module.exports = parse; |