hexo/node_modules/command-exists/lib/command-exists.js

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2023-09-25 15:58:56 +08:00
'use strict';
var exec = require('child_process').exec;
var execSync = require('child_process').execSync;
var fs = require('fs');
var path = require('path');
var access = fs.access;
var accessSync = fs.accessSync;
var constants = fs.constants || fs;
var isUsingWindows = process.platform == 'win32'
var fileNotExists = function(commandName, callback){
access(commandName, constants.F_OK,
function(err){
callback(!err);
});
};
var fileNotExistsSync = function(commandName){
try{
accessSync(commandName, constants.F_OK);
return false;
}catch(e){
return true;
}
};
var localExecutable = function(commandName, callback){
access(commandName, constants.F_OK | constants.X_OK,
function(err){
callback(null, !err);
});
};
var localExecutableSync = function(commandName){
try{
accessSync(commandName, constants.F_OK | constants.X_OK);
return true;
}catch(e){
return false;
}
}
var commandExistsUnix = function(commandName, cleanedCommandName, callback) {
fileNotExists(commandName, function(isFile){
if(!isFile){
var child = exec('command -v ' + cleanedCommandName +
' 2>/dev/null' +
' && { echo >&1 ' + cleanedCommandName + '; exit 0; }',
function (error, stdout, stderr) {
callback(null, !!stdout);
});
return;
}
localExecutable(commandName, callback);
});
}
var commandExistsWindows = function(commandName, cleanedCommandName, callback) {
// Regex from Julio from: https://stackoverflow.com/questions/51494579/regex-windows-path-validator
if (!(/^(?!(?:.*\s|.*\.|\W+)$)(?:[a-zA-Z]:)?(?:(?:[^<>:"\|\?\*\n])+(?:\/\/|\/|\\\\|\\)?)+$/m.test(commandName))) {
callback(null, false);
return;
}
var child = exec('where ' + cleanedCommandName,
function (error) {
if (error !== null){
callback(null, false);
} else {
callback(null, true);
}
}
)
}
var commandExistsUnixSync = function(commandName, cleanedCommandName) {
if(fileNotExistsSync(commandName)){
try {
var stdout = execSync('command -v ' + cleanedCommandName +
' 2>/dev/null' +
' && { echo >&1 ' + cleanedCommandName + '; exit 0; }'
);
return !!stdout;
} catch (error) {
return false;
}
}
return localExecutableSync(commandName);
}
var commandExistsWindowsSync = function(commandName, cleanedCommandName, callback) {
// Regex from Julio from: https://stackoverflow.com/questions/51494579/regex-windows-path-validator
if (!(/^(?!(?:.*\s|.*\.|\W+)$)(?:[a-zA-Z]:)?(?:(?:[^<>:"\|\?\*\n])+(?:\/\/|\/|\\\\|\\)?)+$/m.test(commandName))) {
return false;
}
try {
var stdout = execSync('where ' + cleanedCommandName, {stdio: []});
return !!stdout;
} catch (error) {
return false;
}
}
var cleanInput = function(s) {
if (/[^A-Za-z0-9_\/:=-]/.test(s)) {
s = "'"+s.replace(/'/g,"'\\''")+"'";
s = s.replace(/^(?:'')+/g, '') // unduplicate single-quote at the beginning
.replace(/\\'''/g, "\\'" ); // remove non-escaped single-quote if there are enclosed between 2 escaped
}
return s;
}
if (isUsingWindows) {
cleanInput = function(s) {
var isPathName = /[\\]/.test(s);
if (isPathName) {
var dirname = '"' + path.dirname(s) + '"';
var basename = '"' + path.basename(s) + '"';
return dirname + ':' + basename;
}
return '"' + s + '"';
}
}
module.exports = function commandExists(commandName, callback) {
var cleanedCommandName = cleanInput(commandName);
if (!callback && typeof Promise !== 'undefined') {
return new Promise(function(resolve, reject){
commandExists(commandName, function(error, output) {
if (output) {
resolve(commandName);
} else {
reject(error);
}
});
});
}
if (isUsingWindows) {
commandExistsWindows(commandName, cleanedCommandName, callback);
} else {
commandExistsUnix(commandName, cleanedCommandName, callback);
}
};
module.exports.sync = function(commandName) {
var cleanedCommandName = cleanInput(commandName);
if (isUsingWindows) {
return commandExistsWindowsSync(commandName, cleanedCommandName);
} else {
return commandExistsUnixSync(commandName, cleanedCommandName);
}
};