/usr/lib/coffee-script/src/command.coffee is in coffeescript 1.10.0~dfsg-1.
This file is owned by root:root, with mode 0o644.
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# into various forms: saved into `.js` files or printed to stdout
# or recompiled every time the source is saved,
# printed as a token stream or as the syntax tree, or launch an
# interactive REPL.
# External dependencies.
fs = require 'fs'
path = require 'path'
helpers = require './helpers'
optparse = require './optparse'
CoffeeScript = require './coffee-script'
{spawn, exec} = require 'child_process'
{EventEmitter} = require 'events'
useWinPathSep = path.sep is '\\'
# Allow CoffeeScript to emit Node.js events.
helpers.extend CoffeeScript, new EventEmitter
printLine = (line) -> process.stdout.write line + '\n'
printWarn = (line) -> process.stderr.write line + '\n'
hidden = (file) -> /^\.|~$/.test file
# The help banner that is printed in conjunction with `-h`/`--help`.
BANNER = '''
Usage: coffee [options] path/to/script.coffee -- [args]
If called without options, `coffee` will run your script.
'''
# The list of all the valid option flags that `coffee` knows how to handle.
SWITCHES = [
['-b', '--bare', 'compile without a top-level function wrapper']
['-c', '--compile', 'compile to JavaScript and save as .js files']
['-e', '--eval', 'pass a string from the command line as input']
['-h', '--help', 'display this help message']
['-i', '--interactive', 'run an interactive CoffeeScript REPL']
['-j', '--join [FILE]', 'concatenate the source CoffeeScript before compiling']
['-m', '--map', 'generate source map and save as .js.map files']
['-n', '--nodes', 'print out the parse tree that the parser produces']
[ '--nodejs [ARGS]', 'pass options directly to the "node" binary']
[ '--no-header', 'suppress the "Generated by" header']
['-o', '--output [DIR]', 'set the output directory for compiled JavaScript']
['-p', '--print', 'print out the compiled JavaScript']
['-r', '--require [MODULE*]', 'require the given module before eval or REPL']
['-s', '--stdio', 'listen for and compile scripts over stdio']
['-l', '--literate', 'treat stdio as literate style coffee-script']
['-t', '--tokens', 'print out the tokens that the lexer/rewriter produce']
['-v', '--version', 'display the version number']
['-w', '--watch', 'watch scripts for changes and rerun commands']
]
# Top-level objects shared by all the functions.
opts = {}
sources = []
sourceCode = []
notSources = {}
watchedDirs = {}
optionParser = null
# Run `coffee` by parsing passed options and determining what action to take.
# Many flags cause us to divert before compiling anything. Flags passed after
# `--` will be passed verbatim to your script as arguments in `process.argv`
exports.run = ->
parseOptions()
# Make the REPL *CLI* use the global context so as to (a) be consistent with the
# `node` REPL CLI and, therefore, (b) make packages that modify native prototypes
# (such as 'colors' and 'sugar') work as expected.
replCliOpts = useGlobal: yes
opts.prelude = makePrelude opts.require if opts.require
replCliOpts.prelude = opts.prelude
return forkNode() if opts.nodejs
return usage() if opts.help
return version() if opts.version
return require('./repl').start(replCliOpts) if opts.interactive
return compileStdio() if opts.stdio
return compileScript null, opts.arguments[0] if opts.eval
return require('./repl').start(replCliOpts) unless opts.arguments.length
literals = if opts.run then opts.arguments.splice 1 else []
process.argv = process.argv[0..1].concat literals
process.argv[0] = 'coffee'
opts.output = path.resolve opts.output if opts.output
if opts.join
opts.join = path.resolve opts.join
console.error '''
The --join option is deprecated and will be removed in a future version.
If for some reason it's necessary to share local variables between files,
replace...
$ coffee --compile --join bundle.js -- a.coffee b.coffee c.coffee
with...
$ cat a.coffee b.coffee c.coffee | coffee --compile --stdio > bundle.js
'''
for source in opts.arguments
source = path.resolve source
compilePath source, yes, source
makePrelude = (requires) ->
requires.map (module) ->
[_, name, module] = match if match = module.match(/^(.*)=(.*)$/)
name ||= helpers.baseFileName module, yes, useWinPathSep
"#{name} = require('#{module}')"
.join ';'
# Compile a path, which could be a script or a directory. If a directory
# is passed, recursively compile all '.coffee', '.litcoffee', and '.coffee.md'
# extension source files in it and all subdirectories.
compilePath = (source, topLevel, base) ->
return if source in sources or
watchedDirs[source] or
not topLevel and (notSources[source] or hidden source)
try
stats = fs.statSync source
catch err
if err.code is 'ENOENT'
console.error "File not found: #{source}"
process.exit 1
throw err
if stats.isDirectory()
if path.basename(source) is 'node_modules'
notSources[source] = yes
return
if opts.run
compilePath findDirectoryIndex(source), topLevel, base
return
watchDir source, base if opts.watch
try
files = fs.readdirSync source
catch err
if err.code is 'ENOENT' then return else throw err
for file in files
compilePath (path.join source, file), no, base
else if topLevel or helpers.isCoffee source
sources.push source
sourceCode.push null
delete notSources[source]
watch source, base if opts.watch
try
code = fs.readFileSync source
catch err
if err.code is 'ENOENT' then return else throw err
compileScript(source, code.toString(), base)
else
notSources[source] = yes
findDirectoryIndex = (source) ->
for ext in CoffeeScript.FILE_EXTENSIONS
index = path.join source, "index#{ext}"
try
return index if (fs.statSync index).isFile()
catch err
throw err unless err.code is 'ENOENT'
console.error "Missing index.coffee or index.litcoffee in #{source}"
process.exit 1
# Compile a single source script, containing the given code, according to the
# requested options. If evaluating the script directly sets `__filename`,
# `__dirname` and `module.filename` to be correct relative to the script's path.
compileScript = (file, input, base = null) ->
o = opts
options = compileOptions file, base
try
t = task = {file, input, options}
CoffeeScript.emit 'compile', task
if o.tokens
printTokens CoffeeScript.tokens t.input, t.options
else if o.nodes
printLine CoffeeScript.nodes(t.input, t.options).toString().trim()
else if o.run
CoffeeScript.register()
CoffeeScript.eval opts.prelude, t.options if opts.prelude
CoffeeScript.run t.input, t.options
else if o.join and t.file isnt o.join
t.input = helpers.invertLiterate t.input if helpers.isLiterate file
sourceCode[sources.indexOf(t.file)] = t.input
compileJoin()
else
compiled = CoffeeScript.compile t.input, t.options
t.output = compiled
if o.map
t.output = compiled.js
t.sourceMap = compiled.v3SourceMap
CoffeeScript.emit 'success', task
if o.print
printLine t.output.trim()
else if o.compile or o.map
writeJs base, t.file, t.output, options.jsPath, t.sourceMap
catch err
CoffeeScript.emit 'failure', err, task
return if CoffeeScript.listeners('failure').length
message = err.stack or "#{err}"
if o.watch
printLine message + '\x07'
else
printWarn message
process.exit 1
# Attach the appropriate listeners to compile scripts incoming over **stdin**,
# and write them back to **stdout**.
compileStdio = ->
code = ''
stdin = process.openStdin()
stdin.on 'data', (buffer) ->
code += buffer.toString() if buffer
stdin.on 'end', ->
compileScript null, code
# If all of the source files are done being read, concatenate and compile
# them together.
joinTimeout = null
compileJoin = ->
return unless opts.join
unless sourceCode.some((code) -> code is null)
clearTimeout joinTimeout
joinTimeout = wait 100, ->
compileScript opts.join, sourceCode.join('\n'), opts.join
# Watch a source CoffeeScript file using `fs.watch`, recompiling it every
# time the file is updated. May be used in combination with other options,
# such as `--print`.
watch = (source, base) ->
watcher = null
prevStats = null
compileTimeout = null
watchErr = (err) ->
throw err unless err.code is 'ENOENT'
return unless source in sources
try
rewatch()
compile()
catch
removeSource source, base
compileJoin()
compile = ->
clearTimeout compileTimeout
compileTimeout = wait 25, ->
fs.stat source, (err, stats) ->
return watchErr err if err
return rewatch() if prevStats and
stats.size is prevStats.size and
stats.mtime.getTime() is prevStats.mtime.getTime()
prevStats = stats
fs.readFile source, (err, code) ->
return watchErr err if err
compileScript(source, code.toString(), base)
rewatch()
startWatcher = ->
watcher = fs.watch source
.on 'change', compile
.on 'error', (err) ->
throw err unless err.code is 'EPERM'
removeSource source, base
rewatch = ->
watcher?.close()
startWatcher()
try
startWatcher()
catch err
watchErr err
# Watch a directory of files for new additions.
watchDir = (source, base) ->
watcher = null
readdirTimeout = null
startWatcher = ->
watcher = fs.watch source
.on 'error', (err) ->
throw err unless err.code is 'EPERM'
stopWatcher()
.on 'change', ->
clearTimeout readdirTimeout
readdirTimeout = wait 25, ->
try
files = fs.readdirSync source
catch err
throw err unless err.code is 'ENOENT'
return stopWatcher()
for file in files
compilePath (path.join source, file), no, base
stopWatcher = ->
watcher.close()
removeSourceDir source, base
watchedDirs[source] = yes
try
startWatcher()
catch err
throw err unless err.code is 'ENOENT'
removeSourceDir = (source, base) ->
delete watchedDirs[source]
sourcesChanged = no
for file in sources when source is path.dirname file
removeSource file, base
sourcesChanged = yes
compileJoin() if sourcesChanged
# Remove a file from our source list, and source code cache. Optionally remove
# the compiled JS version as well.
removeSource = (source, base) ->
index = sources.indexOf source
sources.splice index, 1
sourceCode.splice index, 1
unless opts.join
silentUnlink outputPath source, base
silentUnlink outputPath source, base, '.js.map'
timeLog "removed #{source}"
silentUnlink = (path) ->
try
fs.unlinkSync path
catch err
throw err unless err.code in ['ENOENT', 'EPERM']
# Get the corresponding output JavaScript path for a source file.
outputPath = (source, base, extension=".js") ->
basename = helpers.baseFileName source, yes, useWinPathSep
srcDir = path.dirname source
if not opts.output
dir = srcDir
else if source is base
dir = opts.output
else
dir = path.join opts.output, path.relative base, srcDir
path.join dir, basename + extension
# Recursively mkdir, like `mkdir -p`.
mkdirp = (dir, fn) ->
mode = 0o777 & ~process.umask()
do mkdirs = (p = dir, fn) ->
fs.exists p, (exists) ->
if exists
fn()
else
mkdirs path.dirname(p), ->
fs.mkdir p, mode, (err) ->
return fn err if err
fn()
# Write out a JavaScript source file with the compiled code. By default, files
# are written out in `cwd` as `.js` files with the same name, but the output
# directory can be customized with `--output`.
#
# If `generatedSourceMap` is provided, this will write a `.js.map` file into the
# same directory as the `.js` file.
writeJs = (base, sourcePath, js, jsPath, generatedSourceMap = null) ->
sourceMapPath = outputPath sourcePath, base, ".js.map"
jsDir = path.dirname jsPath
compile = ->
if opts.compile
js = ' ' if js.length <= 0
if generatedSourceMap then js = "#{js}\n//# sourceMappingURL=#{helpers.baseFileName sourceMapPath, no, useWinPathSep}\n"
fs.writeFile jsPath, js, (err) ->
if err
printLine err.message
process.exit 1
else if opts.compile and opts.watch
timeLog "compiled #{sourcePath}"
if generatedSourceMap
fs.writeFile sourceMapPath, generatedSourceMap, (err) ->
if err
printLine "Could not write source map: #{err.message}"
process.exit 1
fs.exists jsDir, (itExists) ->
if itExists then compile() else mkdirp jsDir, compile
# Convenience for cleaner setTimeouts.
wait = (milliseconds, func) -> setTimeout func, milliseconds
# When watching scripts, it's useful to log changes with the timestamp.
timeLog = (message) ->
console.log "#{(new Date).toLocaleTimeString()} - #{message}"
# Pretty-print a stream of tokens, sans location data.
printTokens = (tokens) ->
strings = for token in tokens
tag = token[0]
value = token[1].toString().replace(/\n/, '\\n')
"[#{tag} #{value}]"
printLine strings.join(' ')
# Use the [OptionParser module](optparse.html) to extract all options from
# `process.argv` that are specified in `SWITCHES`.
parseOptions = ->
optionParser = new optparse.OptionParser SWITCHES, BANNER
o = opts = optionParser.parse process.argv[2..]
o.compile or= !!o.output
o.run = not (o.compile or o.print or o.map)
o.print = !! (o.print or (o.eval or o.stdio and o.compile))
# The compile-time options to pass to the CoffeeScript compiler.
compileOptions = (filename, base) ->
answer = {
filename
literate: opts.literate or helpers.isLiterate(filename)
bare: opts.bare
header: opts.compile and not opts['no-header']
sourceMap: opts.map
}
if filename
if base
cwd = process.cwd()
jsPath = outputPath filename, base
jsDir = path.dirname jsPath
answer = helpers.merge answer, {
jsPath
sourceRoot: path.relative jsDir, cwd
sourceFiles: [path.relative cwd, filename]
generatedFile: helpers.baseFileName(jsPath, no, useWinPathSep)
}
else
answer = helpers.merge answer,
sourceRoot: ""
sourceFiles: [helpers.baseFileName filename, no, useWinPathSep]
generatedFile: helpers.baseFileName(filename, yes, useWinPathSep) + ".js"
answer
# Start up a new Node.js instance with the arguments in `--nodejs` passed to
# the `node` binary, preserving the other options.
forkNode = ->
nodeArgs = opts.nodejs.split /\s+/
args = process.argv[1..]
args.splice args.indexOf('--nodejs'), 2
p = spawn process.execPath, nodeArgs.concat(args),
cwd: process.cwd()
env: process.env
stdio: [0, 1, 2]
p.on 'exit', (code) -> process.exit code
# Print the `--help` usage message and exit. Deprecated switches are not
# shown.
usage = ->
printLine (new optparse.OptionParser SWITCHES, BANNER).help()
# Print the `--version` message and exit.
version = ->
printLine "CoffeeScript version #{CoffeeScript.VERSION}"
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