Detailansicht verbessert

express-server/node_modules/cross-spawn/lib/parse.js

@@ -0,0 +1,113 @@
+'use strict';
+
+var resolveCommand = require('./util/resolveCommand');
+var hasEmptyArgumentBug = require('./util/hasEmptyArgumentBug');
+var escapeArgument = require('./util/escapeArgument');
+var escapeCommand = require('./util/escapeCommand');
+var readShebang = require('./util/readShebang');
+
+var isWin = process.platform === 'win32';
+var skipShellRegExp = /\.(?:com|exe)$/i;
+
+// Supported in Node >= 6 and >= 4.8
+var supportsShellOption = parseInt(process.version.substr(1).split('.')[0], 10) >= 6 ||
+ parseInt(process.version.substr(1).split('.')[0], 10) === 4 && parseInt(process.version.substr(1).split('.')[1], 10) >= 8;
+
+function parseNonShell(parsed) {
+    var shebang;
+    var needsShell;
+    var applyQuotes;
+
+    if (!isWin) {
+        return parsed;
+    }
+
+    // Detect & add support for shebangs
+    parsed.file = resolveCommand(parsed.command);
+    parsed.file = parsed.file || resolveCommand(parsed.command, true);
+    shebang = parsed.file && readShebang(parsed.file);
+
+    if (shebang) {
+        parsed.args.unshift(parsed.file);
+        parsed.command = shebang;
+        needsShell = hasEmptyArgumentBug || !skipShellRegExp.test(resolveCommand(shebang) || resolveCommand(shebang, true));
+    } else {
+        needsShell = hasEmptyArgumentBug || !skipShellRegExp.test(parsed.file);
+    }
+
+    // If a shell is required, use cmd.exe and take care of escaping everything correctly
+    if (needsShell) {
+        // Escape command & arguments
+        applyQuotes = (parsed.command !== 'echo');  // Do not quote arguments for the special "echo" command
+        parsed.command = escapeCommand(parsed.command);
+        parsed.args = parsed.args.map(function (arg) {
+            return escapeArgument(arg, applyQuotes);
+        });
+
+        // Make use of cmd.exe
+        parsed.args = ['/d', '/s', '/c', '"' + parsed.command + (parsed.args.length ? ' ' + parsed.args.join(' ') : '') + '"'];
+        parsed.command = process.env.comspec || 'cmd.exe';
+        parsed.options.windowsVerbatimArguments = true;  // Tell node's spawn that the arguments are already escaped
+    }
+
+    return parsed;
+}
+
+function parseShell(parsed) {
+    var shellCommand;
+
+    // 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
+    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) {
+    var parsed;
+
+    // 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 || {};
+
+    // Build our parsed object
+    parsed = {
+        command: command,
+        args: args,
+        options: options,
+        file: undefined,
+        original: command,
+    };
+
+    // Delegate further parsing to shell or non-shell
+    return options.shell ? parseShell(parsed) : parseNonShell(parsed);
+}
+
+module.exports = parse;