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- _ = require("underscore")
- logger = require("logger-sharelatex")
- child_process = require('child_process')
- # execute a command in the same way as 'exec' but with a timeout that
- # kills all child processes
- #
- # we spawn the command with 'detached:true' to make a new process
- # group, then we can kill everything in that process group.
- module.exports = (command, options, callback = (err, stdout, stderr) ->) ->
- # options are {timeout: number-of-milliseconds, killSignal: signal-name}
- [cmd, args...] = command.split(' ')
- child = child_process.spawn cmd, args, {detached:true}
- stdout = ""
- stderr = ""
- cleanup = _.once (err) ->
- clearTimeout killTimer if killTimer?
- callback err, stdout, stderr
- if options.timeout?
- killTimer = setTimeout () ->
- try
- # use negative process id to kill process group
- process.kill -child.pid, options.killSignal || "SIGTERM"
- catch error
- logger.log process: child.pid, kill_error: error, "error killing process"
- , options.timeout
- child.on 'close', (code, signal) ->
- err = if code then new Error("exit status #{code}") else signal
- cleanup err
- child.on 'error', (err) ->
- cleanup err
- child.stdout.on 'data', (chunk) ->
- stdout += chunk
- child.stderr.on 'data', (chunk) ->
- stderr += chunk
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