project-nexus/app/src/components/Process.coffee

A hub for all your programming projects

class @Process extends React.Component
	
	{exec, spawn} = require "child_process"
	process_tree = require "process-tree"
	
	node_inspector = null
	
	start_node_inspector = (callback)->
		if node_inspector?
			console.log "node-inspector is already running (okay)"
			return
		web_port = 9899
		debug_port = 5858 # the default
		console.log "Start node-inspector"
		args = "--web-port #{web_port} --debug-port #{debug_port}"
		info = "node-inspector #{args}"
		command = "node #{global.require.resolve "node-inspector/bin/inspector"} #{args}"
		node_inspector = exec command
		console.log node_inspector
		
		{pid} = node_inspector
		window.background_processes ?= []
		window.background_processes.push pid
		Settings.update "running_processes", (running_processes = [])->
			running_processes.push {pid, command, info, background: yes}
			running_processes
		
		stdout = ""
		stderr = ""
		node_inspector.stdout.on "data", (data)->
			stdout += data; console.log "Recieved stdout from node-inspector:", data
			if m = data.match /Visit (.*) to start debugging/
				[_, url] = m
				callback null, url
		node_inspector.stderr.on "data", (data)->
			stderr += data; console.log "Recieved stderr from node-inspector:", data
		node_inspector.on "error", callback
		node_inspector.on "close", (code)->
			node_inspector = null
			
			window.background_processes =
				bproc for bproc in window.background_processes when bproc.pid isnt pid
			Settings.update "running_processes", (running_processes = [])->
				rproc for rproc in running_processes when rproc.pid isnt pid
			
			if code
				callback new Error "node-inspector exited with code #{code}:\n#{stderr}"
			else
				console.log "node-inspector exited with code #{code}:\n#{stdout}"
	
	enable_debugging = (pid, callback)->
		if process.platform is "win32"
			console.log "Enable debugging in node process #{pid} by executing process._debugProcess in a new node process"
			cp = spawn "node", ["-e", "process._debugProcess(#{pid})"]
			cp.on "error", callback
			stderr = ""
			cp.stderr.on "data", (data)->
				stderr += data
			cp.on "close", (code)->
				if code
					callback new Error "Process exited with code #{code}:\n#{stderr}"
				else
					callback()
		else
			console.log "Enable debugging in node process #{pid} by sending SIGUSR1"
			process.kill pid, "SIGUSR1"
			process.nextTick callback
	
	render: ->
		{command, process: proc, project} = @props
		console.log proc, @props
		E ".process", key: command,
			E "header",
				E ".process-info", proc.info
				if proc.exitCode?
					E ".process-exited", "exited with code #{proc.exitCode}"
				else
					if command.match /^(node(js)?|iojs|npm)(\.exe)?\s/ # hueristic
						E "button.button.icobutton.inspect-with-blink",
							onClick: ->
								if proc.debug_url
									(require "nw.gui").Shell.openExternal proc.debug_url
									# @TODO: instead of opening the url externally,
									# maybe refresh the iframe/webview of the debugger?
									# no, close it
									return
								
								console.log "get children of #{proc.pid}"
								process_tree proc.pid, (err, children)->
									console.log proc.pid, err, children
									process_to_debug = null
									for npm in children when npm.name.match /(node(js)?|iojs|npm)?(\.exe)?$/ # not conhost.exe
										[npm_running_script] = npm.children
										if npm_running_script?.children?.length
											[node_maybe] = npm_running_script.children
											process_to_debug = node_maybe if node_maybe.name.match /(node(js)?|iojs)(\.exe)?$/
									if process_to_debug
										enable_debugging process_to_debug.pid, (err)->
											if err
												console.error "Failed to enable debugging in node process", process_to_debug.pid, "\n", err
											else
												console.log "Debugging enabled for node process #{process_to_debug.pid}"
												start_node_inspector (err, url)->
													if err
														console.error "Failed to start node-inspector:\n", err
													else
														console.log "Started node-inspector"
														proc.debug_url = url
														# @TODO: embed the debugger in an iframe or webview
														# instead of opening the url externally
														(require "nw.gui").Shell.openExternal proc.debug_url
														# window.render()
									else
										console.error "No node process found to debug in children of #{proc.pid}:", children
										alert "No node process found to debug"
									
							E "i.octicon.octicon-bug"
				E "button.button.icobutton.close-process",
					onClick: ->
						if proc.running
							proc.on "exit", ->
								delete project.processes[command]
								window.render()
							proc.kill()
						else
							delete project.processes[command]
							window.render()
					E "i.octicon.octicon-x"
			
			E Terminal, {process: proc, id: project.id}
			
			# @TODO: embed the debugger in an iframe or webview
			# an iframe gets content security policy errors
			# and a webview gets nothing (can't debug it)
			# if proc.debug_url
			# 	E "webview", src: proc.debug_url