83 lines
1.7 KiB
JavaScript
83 lines
1.7 KiB
JavaScript
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'use strict';
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var async = require('async');
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var fs = require('fs');
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var path = require('path');
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module.exports = hasbin;
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hasbin.async = hasbin;
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hasbin.sync = hasbinSync;
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hasbin.all = hasbinAll;
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hasbin.all.sync = hasbinAllSync;
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hasbin.some = hasbinSome;
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hasbin.some.sync = hasbinSomeSync;
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hasbin.first = hasbinFirst;
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hasbin.first.sync = hasbinFirstSync;
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hasbin.every = hasbin.all;
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hasbin.any = hasbin.some;
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function hasbin (bin, done) {
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async.some(getPaths(bin), fileExists, done);
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}
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function hasbinSync (bin) {
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return getPaths(bin).some(fileExistsSync);
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}
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function hasbinAll (bins, done) {
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async.every(bins, hasbin.async, done);
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}
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function hasbinAllSync (bins) {
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return bins.every(hasbin.sync);
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}
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function hasbinSome (bins, done) {
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async.some(bins, hasbin.async, done);
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}
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function hasbinSomeSync (bins) {
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return bins.some(hasbin.sync);
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}
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function hasbinFirst (bins, done) {
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async.detect(bins, hasbin.async, function (result) {
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done(result || false);
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});
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}
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function hasbinFirstSync (bins) {
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var matched = bins.filter(hasbin.sync);
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return matched.length ? matched[0] : false;
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}
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function getPaths (bin) {
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var envPath = (process.env.PATH || '');
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var envExt = (process.env.PATHEXT || '');
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return envPath.replace(/["]+/g, '').split(path.delimiter).map(function (chunk) {
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return envExt.split(path.delimiter).map(function (ext) {
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return path.join(chunk, bin + ext);
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});
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}).reduce(function (a, b) {
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return a.concat(b);
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});
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}
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function fileExists (filePath, done) {
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fs.stat(filePath, function (error, stat) {
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if (error) {
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return done(false);
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}
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done(stat.isFile());
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});
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}
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function fileExistsSync (filePath) {
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try {
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return fs.statSync(filePath).isFile();
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} catch (error) {
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return false;
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}
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}
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