39 lines
1.1 KiB
JavaScript
39 lines
1.1 KiB
JavaScript
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'use strict';
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var path = require('path');
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var which = require('which');
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var LRU = require('lru-cache');
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var commandCache = new LRU({ max: 50, maxAge: 30 * 1000 }); // Cache just for 30sec
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var hasSepInPathRegExp = new RegExp(process.platform === 'win32' ? /[\/\\]/ : /\//);
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function resolveCommand(command, noExtension) {
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var resolved;
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// If command looks like a file path, make it absolute to make it canonical
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// and also to circuvent a bug in which, see: https://github.com/npm/node-which/issues/33
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if (hasSepInPathRegExp.test(command)) {
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command = path.resolve(command);
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}
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noExtension = !!noExtension;
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resolved = commandCache.get(command + '!' + noExtension);
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// Check if its resolved in the cache
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if (commandCache.has(command)) {
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return commandCache.get(command);
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}
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try {
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resolved = !noExtension ?
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which.sync(command) :
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which.sync(command, { pathExt: path.delimiter + (process.env.PATHEXT || '') });
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} catch (e) { /* empty */ }
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commandCache.set(command + '!' + noExtension, resolved);
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return resolved;
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}
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module.exports = resolveCommand;
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