path: root/tools/shared.py

import shutil, time, os, sys, json, tempfile, copy, shlex, atexit, subprocess
from subprocess import Popen, PIPE, STDOUT
from tempfile import mkstemp

import js_optimizer

__rootpath__ = os.path.abspath(os.path.dirname(os.path.dirname(__file__)))
def path_from_root(*pathelems):
  return os.path.join(__rootpath__, *pathelems)

# Emscripten configuration is done through the EM_CONFIG environment variable.
# If the string value contained in this environment variable contains newline
# separated definitions, then these definitions will be used to configure
# Emscripten.  Otherwise, the string is understood to be a path to a settings
# file that contains the required definitions.

EM_CONFIG = os.environ.get('EM_CONFIG')
if not EM_CONFIG:
  EM_CONFIG = '~/.emscripten'
if '\n' in EM_CONFIG:
  CONFIG_FILE = None
else:
  CONFIG_FILE = os.path.expanduser(EM_CONFIG)
  if not os.path.exists(CONFIG_FILE):
    config_file = open(path_from_root('tools', 'settings_template_readonly.py')).read().split('\n')
    config_file = config_file[1:] # remove "this file will be copied..."
    config_file = '\n'.join(config_file)
    # autodetect some default paths
    config_file = config_file.replace('{{{ EMSCRIPTEN_ROOT }}}', __rootpath__)
    llvm_root = '/usr/bin'
    try:
      llvm_root = os.path.dirname(Popen(['which', 'clang'], stdout=PIPE).communicate()[0].replace('\n', ''))
    except:
      pass
    config_file = config_file.replace('{{{ LLVM_ROOT }}}', llvm_root)
    node = 'node'
    try:
      node = Popen(['which', 'node'], stdout=PIPE).communicate()[0].replace('\n', '') or \
             Popen(['which', 'nodejs'], stdout=PIPE).communicate()[0].replace('\n', '')
    except:
      pass
    config_file = config_file.replace('{{{ NODE }}}', node)

    # write
    open(CONFIG_FILE, 'w').write(config_file)
    print >> sys.stderr, '''
==============================================================================
Welcome to Emscripten!

This is the first time any of the Emscripten tools has been run.

A settings file has been copied to %s, at absolute path: %s

It contains our best guesses for the important paths, which are:

  LLVM_ROOT       = %s
  NODE_JS         = %s
  EMSCRIPTEN_ROOT = %s

Please edit the file if any of those are incorrect.

This command will now exit. When you are done editing those paths, re-run it.
==============================================================================
''' % (EM_CONFIG, CONFIG_FILE, llvm_root, node, __rootpath__)
    sys.exit(0)
try:
  config_text = open(CONFIG_FILE, 'r').read() if CONFIG_FILE else EM_CONFIG
  exec(config_text)
except Exception, e:
  print >> sys.stderr, 'Error in evaluating %s (at %s): %s, text: %s' % (EM_CONFIG, CONFIG_FILE, str(e), config_text)
  sys.exit(1)

# Expectations

EXPECTED_LLVM_VERSION = (3,1)

def check_clang_version():
  expected = 'clang version ' + '.'.join(map(str, EXPECTED_LLVM_VERSION))
  actual = Popen([CLANG, '-v'], stderr=PIPE).communicate()[1].split('\n')[0]
  if expected in actual:
    return True
  print >> sys.stderr, 'warning: LLVM version appears incorrect (seeing "%s", expected "%s")' % (actual, expected)
  return False

def check_llvm_version():
  try:
    check_clang_version();
  except Exception, e:
    print >> sys.stderr, 'warning: Could not verify LLVM version: %s' % str(e)

EXPECTED_NODE_VERSION = (0,6,8)

def check_node_version():
  try:
    actual = Popen([NODE_JS, '--version'], stdout=PIPE).communicate()[0].strip()
    version = tuple(map(int, actual.replace('v', '').split('.')))
    if version >= EXPECTED_NODE_VERSION:
      return True
    print >> sys.stderr, 'warning: node version appears too old (seeing "%s", expected "%s")' % (actual, 'v' + ('.'.join(map(str, EXPECTED_NODE_VERSION))))
    return False
  except Exception, e:
    print >> sys.