fs = require 'fs' path = require 'path' vm = require 'vm' nodeREPL = require 'repl' CoffeeScript = require './coffee-script' {merge, prettyErrorMessage} = require './helpers' icedmod = require './iced' iced = icedmod.runtime replDefaults = prompt: 'iced> ', historyFile: path.join(process.env.HOME, '.iced_history') if process.env.HOME historyMaxInputSize: 10240 eval: (input, context, filename, cb) ->
XXX: multiline hack.
input = input.replace /\uFF00/g, '\n'
Node's REPL sends the input ending with a newline and then wrapped in parens. Unwrap all that.
input = input.replace /^\(([\s\S]*)\n\)$/m, '1ドル'
Require AST nodes to do some AST manipulation.
{Block, Assign, Value, Literal} = require './nodes'iced runtime in place for iced features....
context.iced = iced run = (js) -> vm.runInContext(js, context, filename) try
Generate the AST of the clean input.
ast = CoffeeScript.nodes input, { repl : true }Add assignment to _ variable to force the input to be an expression.
unless ast.icedIsCpsPivot() ast = new Block [ new Assign (new Value new Literal '_'), ast, '=' ] js = ast.compile bare: yes, locals: Object.keys(context) if ast.icedIsCpsPivot() await context[icedmod.const.k] = defer() ret = run js else ret = run js cb null, ret catch err cb prettyErrorMessage(err, filename, input, yes) addMultilineHandler = (repl) -> {rli, inputStream, outputStream} = repl multiline = enabled: off initialPrompt: repl.prompt.replace /^[^> ]*/, (x) -> x.replace /./g, '-' prompt: repl.prompt.replace /^[^> ]*>?/, (x) -> x.replace /./g, '.' buffer: ''
Proxy node's line listener
nodeLineListener = rli.listeners('line')[0] rli.removeListener 'line', nodeLineListener rli.on 'line', (cmd) -> if multiline.enabled multiline.buffer += "#{cmd}\n" rli.setPrompt multiline.prompt rli.prompt true else nodeLineListener cmd return
Handle Ctrl-v
inputStream.on 'keypress', (char, key) -> return unless key and key.ctrl and not key.meta and not key.shift and key.name is 'v' if multiline.enabled
allow arbitrarily switching between modes any time before multiple lines are entered
unless multiline.buffer.match /\n/ multiline.enabled = not multiline.enabled rli.setPrompt repl.prompt rli.prompt true return
no-op unless the current line is empty
return if rli.line? and not rli.line.match /^\s*$/
eval, print, loop
multiline.enabled = not multiline.enabled rli.line = '' rli.cursor = 0 rli.output.cursorTo 0 rli.output.clearLine 1
XXX: multiline hack
multiline.buffer = multiline.buffer.replace /\n/g, '\uFF00' rli.emit 'line', multiline.buffer multiline.buffer = '' else multiline.enabled = not multiline.enabled rli.setPrompt multiline.initialPrompt rli.prompt true return
Store and load command history from a file
addHistory = (repl, filename, maxSize) -> lastLine = null try
Get file info and at most maxSize of command history
stat = fs.statSync filename size = Math.min maxSize, stat.size
Read last size bytes from the file
readFd = fs.openSync filename, 'r' buffer = new Buffer(size) fs.readSync readFd, buffer, 0, size, stat.size - size
Set the history on the interpreter
repl.rli.history = buffer.toString().split('\n').reverse()If the history file was truncated we should pop off a potential partial line
repl.rli.history.pop() if stat.size > maxSizeShift off the final blank newline
repl.rli.history.shift() if repl.rli.history[0] is '' repl.rli.historyIndex = -1 lastLine = repl.rli.history[0] fd = fs.openSync filename, 'a' repl.rli.addListener 'line', (code) -> if code and code.length and code isnt '.history' and lastLine isnt code
Save the latest command in the file
fs.write fd, "#{code}\n" lastLine = code repl.rli.on 'exit', -> fs.close fd
Add a command to show the history stack
repl.commands['.history'] = help: 'Show command history' action: -> repl.outputStream.write "#{repl.rli.history[..].reverse().join '\n'}\n" repl.displayPrompt() module.exports = start: (opts = {}) -> [major, minor, build] = process.versions.node.split('.').map (n) -> parseInt(n) if major is 0 and minor < 8 console.warn "Node 0.8.0+ required for CoffeeScript REPL" process.exit 1 opts = merge replDefaults, opts repl = nodeREPL.start opts repl.on 'exit', -> repl.outputStream.write '\n' addMultilineHandler repl addHistory repl, opts.historyFile, opts.historyMaxInputSize if opts.historyFile repl