mirror of https://github.com/node-red/node-red.git
92 lines
3.3 KiB
JavaScript
92 lines
3.3 KiB
JavaScript
/*!
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* Copyright JS Foundation and other contributors, http://js.foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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**/
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/**
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* Run system commands with event-log integration
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* @mixin @node-red/util_exec
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*/
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const child_process = require('child_process');
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const events = require("./events");
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const util = require('./util');
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function logLines(id,type,data) {
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events.emit("event-log", {id:id,payload:{ts: Date.now(),data:data,type:type}});
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}
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module.exports = {
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/**
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* Run a system command with stdout/err being emitted as 'event-log' events
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* on the @node-red/util/events handler.
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*
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* The main arguments to this function are the same as passed to `child_process.spawn`
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*
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* @param {String} command - the command to run
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* @param {Array} args - arguments for the command
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* @param {Object} options - options to pass child_process.spawn
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* @param {Boolean} emit - whether to emit events to the event-log for each line of stdout/err
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* @return {Promise} A promise that resolves (rc=0) or rejects (rc!=0) when the command completes. The value
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* of the promise is an object of the form:
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*
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* {
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* code: <exit code>,
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* stdout: <standard output from the command>,
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* stderr: <standard error from the command>
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* }
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* @memberof @node-red/util_exec
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*/
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run: function(command,args,options,emit) {
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var invocationId = util.generateId();
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emit && events.emit("event-log", {ts: Date.now(),id:invocationId,payload:{ts: Date.now(),data:command+" "+args.join(" ")}});
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return new Promise((resolve, reject) => {
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let stdout = "";
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let stderr = "";
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const child = child_process.spawn(command,args,options);
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child.stdout.on('data', (data) => {
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const str = ""+data;
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stdout += str;
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emit && logLines(invocationId,"out",str);
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});
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child.stderr.on('data', (data) => {
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const str = ""+data;
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stderr += str;
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emit && logLines(invocationId,"err",str);
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});
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child.on('error', function(err) {
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stderr = err.toString();
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emit && logLines(invocationId,"err",stderr);
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})
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child.on('close', (code) => {
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let result = {
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code: code,
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stdout: stdout,
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stderr: stderr
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}
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emit && events.emit("event-log", {id:invocationId,payload:{ts: Date.now(),data:"rc="+code}});
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if (code === 0) {
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resolve(result)
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} else {
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reject(result);
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}
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});
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})
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}
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}
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