overleaf/services/clsi/app/coffee/LocalCommandRunner.coffee

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spawn = require("child_process").spawn
logger = require "logger-sharelatex"
logger.info "using standard command runner"
module.exports = CommandRunner =
run: (project_id, command, directory, image, timeout, environment, callback = (error) ->) ->
command = (arg.toString().replace('$COMPILE_DIR', directory) for arg in command)
logger.log project_id: project_id, command: command, directory: directory, "running command"
logger.warn "timeouts and sandboxing are not enabled with CommandRunner"
# merge environment settings
env = {}
env[key] = value for key, value of process.env
env[key] = value for key, value of environment
# run command as detached process so it has its own process group (which can be killed if needed)
proc = spawn command[0], command.slice(1), cwd: directory, env: env
stdout = ""
proc.stdout.on "data", (data)->
stdout += data
proc.on "error", (err)->
logger.err err:err, project_id:project_id, command: command, directory: directory, "error running command"
callback(err)
proc.on "close", (code, signal) ->
logger.info code:code, signal:signal, project_id:project_id, "command exited"
if signal is 'SIGTERM' # signal from kill method below
err = new Error("terminated")
err.terminated = true
return callback(err)
else if code is 1 # exit status from chktex
err = new Error("exited")
err.code = code
return callback(err)
else
callback(null, {"stdout": stdout})
return proc.pid # return process id to allow job to be killed if necessary
kill: (pid, callback = (error) ->) ->
try
process.kill -pid # kill all processes in group
catch err
return callback(err)
callback()