90 lines
1.9 KiB
JavaScript
90 lines
1.9 KiB
JavaScript
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var
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cp = require("child_process"),
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merge = require("merge");
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var
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sh, cmd,
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defSpawnOptions = { stdio: "inherit" };
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/**
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* @summary Get shell program meta for current platform
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* @private
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* @returns {Object}
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*/
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function getShell(){
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if (process.platform === "win32") {
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return { cmd: "cmd", arg: "/C" };
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} else {
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return { cmd: "sh", arg: "-c" };
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}
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}
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/**
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* Callback is called with the output when the process terminates. Output is
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* available when true is passed as options argument or stdio: null set
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* within given options.
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*
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* @summary Execute shell command forwarding all stdio
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* @param {String|Array} command
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* @param {Object|TRUE} [options] spawn() options or TRUE to set stdio: null
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* @param {Function} [callback]
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* @returns {ChildProcess}
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*/
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function execSh(command, options, callback){
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if (Array.isArray(command)) {
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command = command.join(";");
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}
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if (options === true) {
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options = { stdio: null };
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}
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if (typeof options === "function") {
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callback = options;
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options = defSpawnOptions;
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} else {
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options = options || {};
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options = merge(true, defSpawnOptions, options);
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callback = callback || function(){};
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}
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var
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child,
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stdout = "", stderr = "",
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shell = getShell();
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try {
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child = cp.spawn(shell.cmd, [shell.arg, command], options);
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} catch (e) {
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callback(e, stdout, stderr);
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return;
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}
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if (child.stdout) {
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child.stdout.on("data", function(data){
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stdout += data;
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});
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}
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if (child.stderr) {
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child.stderr.on("data", function(data){
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stderr += data;
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});
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}
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child.on("close", function(code){
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if (code) {
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var e = new Error("Shell command exit with non zero code: " + code);
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e.code = code;
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callback(e, stdout, stderr);
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} else {
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callback(null, stdout, stderr);
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}
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});
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return child;
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}
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module.exports = execSh;
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