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emsdk.py
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emsdk.py
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#!/usr/bin/env python
# Copyright 2019 The Emscripten Authors. All rights reserved.
# Emscripten is available under two separate licenses, the MIT license and the
# University of Illinois/NCSA Open Source License. Both these licenses can be
# found in the LICENSE file.
from __future__ import print_function
import copy
from collections import OrderedDict
import errno
import json
import multiprocessing
import os
import os.path
import platform
import re
import shutil
import stat
import subprocess
import sys
import sysconfig
import zipfile
if os.name == 'nt':
try:
import winreg
except ImportError:
# old python 2 name
import _winreg as winreg
import ctypes.wintypes
if sys.version_info >= (3,):
from urllib.parse import urljoin
from urllib.request import urlopen
import functools
else:
from urlparse import urljoin
from urllib2 import urlopen
emsdk_packages_url = 'https://storage.googleapis.com/webassembly/emscripten-releases-builds/deps/'
emscripten_releases_repo = 'https://chromium.googlesource.com/emscripten-releases'
emscripten_releases_download_url_template = "https://storage.googleapis.com/webassembly/emscripten-releases-builds/%s/%s/wasm-binaries%s.%s"
# This was previously `master.zip` but we are transitioning to `main` and
# `HEAD.zip` works for both cases. In future we could switch this to
# `main.zip` perhaps.
emsdk_zip_download_url = 'https://github.com/emscripten-core/emsdk/archive/HEAD.zip'
download_dir = 'downloads/'
extra_release_tag = None
# Enable this to do very verbose printing about the different steps that are
# being run. Useful for debugging.
VERBOSE = int(os.getenv('EMSDK_VERBOSE', '0'))
QUIET = int(os.getenv('EMSDK_QUIET', '0'))
TTY_OUTPUT = not os.getenv('EMSDK_NOTTY', not sys.stdout.isatty())
def info(msg):
if not QUIET:
print(msg, file=sys.stderr)
def errlog(msg):
print(msg, file=sys.stderr)
def exit_with_error(msg):
errlog('error: %s' % msg)
sys.exit(1)
WINDOWS = False
MINGW = False
MSYS = False
MACOS = False
LINUX = False
if 'EMSDK_OS' in os.environ:
EMSDK_OS = os.environ['EMSDK_OS']
if EMSDK_OS == 'windows':
WINDOWS = True
elif EMSDK_OS == 'linux':
LINUX = True
elif EMSDK_OS == 'macos':
MACOS = True
else:
assert False, 'EMSDK_OS must be one of: windows, linux, macos'
else:
if os.name == 'nt' or ('windows' in os.getenv('SYSTEMROOT', '').lower()) or ('windows' in os.getenv('COMSPEC', '').lower()):
WINDOWS = True
if os.getenv('MSYSTEM'):
MSYS = True
# Some functions like os.path.normpath() exhibit different behavior between
# different versions of Python, so we need to distinguish between the MinGW
# and MSYS versions of Python
if sysconfig.get_platform() == 'mingw':
MINGW = True
if os.getenv('MSYSTEM') != 'MSYS' and os.getenv('MSYSTEM') != 'MINGW64':
# https://stackoverflow.com/questions/37460073/msys-vs-mingw-internal-environment-variables
errlog('Warning: MSYSTEM environment variable is present, and is set to "' + os.getenv('MSYSTEM') + '". This shell has not been tested with emsdk and may not work.')
if platform.mac_ver()[0] != '':
MACOS = True
if not MACOS and (platform.system() == 'Linux'):
LINUX = True
UNIX = (MACOS or LINUX)
# Pick which shell of 4 shells to use
POWERSHELL = bool(os.getenv('EMSDK_POWERSHELL'))
CSH = bool(os.getenv('EMSDK_CSH'))
CMD = bool(os.getenv('EMSDK_CMD'))
BASH = bool(os.getenv('EMSDK_BASH'))
if WINDOWS and BASH:
MSYS = True
if not CSH and not POWERSHELL and not BASH and not CMD:
# Fall back to default of `cmd` on windows and `bash` otherwise
if WINDOWS and not MSYS:
CMD = True
else:
BASH = True
if WINDOWS:
ENVPATH_SEPARATOR = ';'
else:
ENVPATH_SEPARATOR = ':'
# platform.machine() may return AMD64 on windows, so standardize the case.
machine = os.getenv('EMSDK_ARCH', platform.machine().lower())
if machine.startswith('x64') or machine.startswith('amd64') or machine.startswith('x86_64'):
ARCH = 'x86_64'
elif machine.endswith('86'):
ARCH = 'x86'
elif machine.startswith('aarch64') or machine.lower().startswith('arm64'):
if WINDOWS:
errlog('No support for Windows on Arm, fallback to x64')
ARCH = 'x86_64'
else:
ARCH = 'arm64'
elif machine.startswith('arm'):
ARCH = 'arm'
else:
exit_with_error('unknown machine architecture: ' + machine)
# Don't saturate all cores to not steal the whole system, but be aggressive.
CPU_CORES = int(os.getenv('EMSDK_NUM_CORES', max(multiprocessing.cpu_count() - 1, 1)))
CMAKE_BUILD_TYPE_OVERRIDE = None
# If true, perform a --shallow clone of git.
GIT_CLONE_SHALLOW = False
# If true, LLVM backend is built with tests enabled, and Binaryen is built with
# Visual Studio static analyzer enabled.
BUILD_FOR_TESTING = False
# If 'auto', assertions are decided by the build type
# (Release&MinSizeRel=disabled, Debug&RelWithDebInfo=enabled)
# Other valid values are 'ON' and 'OFF'
ENABLE_LLVM_ASSERTIONS = 'auto'
# If true, keeps the downloaded archive files.
KEEP_DOWNLOADS = bool(os.getenv('EMSDK_KEEP_DOWNLOADS'))
def os_name():
if WINDOWS:
return 'win'
elif LINUX:
return 'linux'
elif MACOS:
return 'mac'
else:
raise Exception('unknown OS')
def debug_print(msg):
if VERBOSE:
errlog(msg)
def to_unix_path(p):
return p.replace('\\', '/')
EMSDK_PATH = to_unix_path(os.path.dirname(os.path.realpath(__file__)))
EMSDK_SET_ENV = ""
if POWERSHELL:
EMSDK_SET_ENV = os.path.join(EMSDK_PATH, 'emsdk_set_env.ps1')
else:
EMSDK_SET_ENV = os.path.join(EMSDK_PATH, 'emsdk_set_env.bat')
# Parses https://github.com/emscripten-core/emscripten/tree/d6aced8 to a pair (https://github.com/emscripten-core/emscripten, d6aced8)
def parse_github_url_and_refspec(url):
if not url:
return ('', '')
if url.endswith(('/tree/', '/tree', '/commit/', '/commit')):
raise Exception('Malformed git URL and refspec ' + url + '!')
if '/tree/' in url:
if url.endswith('/'):
raise Exception('Malformed git URL and refspec ' + url + '!')
return url.split('/tree/')
elif '/commit/' in url:
if url.endswith('/'):
raise Exception('Malformed git URL and refspec ' + url + '!')
return url.split('/commit/')
else:
return (url, 'main') # Assume the default branch is main in the absence of a refspec
ARCHIVE_SUFFIXES = ('zip', '.tar', '.gz', '.xz', '.tbz2', '.bz2')
# Finds the given executable 'program' in PATH. Operates like the Unix tool 'which'.
def which(program):
def is_exe(fpath):
return os.path.isfile(fpath) and (WINDOWS or os.access(fpath, os.X_OK))
fpath, fname = os.path.split(program)
if fpath:
if is_exe(program):
return program
else:
for path in os.environ["PATH"].split(os.pathsep):
path = path.strip('"')
exe_file = os.path.join(path, program)
if is_exe(exe_file):
return exe_file
if WINDOWS and '.' not in fname:
if is_exe(exe_file + '.exe'):
return exe_file + '.exe'
if is_exe(exe_file + '.cmd'):
return exe_file + '.cmd'
if is_exe(exe_file + '.bat'):
return exe_file + '.bat'
return None
def vswhere(version):
try:
program_files = os.getenv('ProgramFiles(x86)')
if not program_files:
program_files = os.environ['ProgramFiles']
vswhere_path = os.path.join(program_files, 'Microsoft Visual Studio', 'Installer', 'vswhere.exe')
# Source: https://learn.microsoft.com/en-us/visualstudio/install/workload-component-id-vs-build-tools?view=vs-2022
tools_arch = 'ARM64' if ARCH == 'arm64' else 'x86.x64'
# The "-products *" allows detection of Build Tools, the "-prerelease" allows detection of Preview version
# of Visual Studio and Build Tools.
output = json.loads(subprocess.check_output([vswhere_path, '-latest', '-products', '*', '-prerelease', '-version', '[%s.0,%s.0)' % (version, version + 1), '-requires', 'Microsoft.VisualStudio.Component.VC.Tools.' + tools_arch, '-property', 'installationPath', '-format', 'json']))
return str(output[0]['installationPath'])
except Exception:
return ''
def vs_filewhere(installation_path, platform, file):
try:
vcvarsall = os.path.join(installation_path, 'VC\\Auxiliary\\Build\\vcvarsall.bat')
env = subprocess.check_output('cmd /c "%s" %s & where %s' % (vcvarsall, platform, file))
paths = [path[:-len(file)] for path in env.split('\r\n') if path.endswith(file)]
return paths[0]
except Exception:
return ''
CMAKE_GENERATOR = 'Unix Makefiles'
if WINDOWS:
# Detect which CMake generator to use when building on Windows
if '--mingw' in sys.argv:
CMAKE_GENERATOR = 'MinGW Makefiles'
elif '--vs2022' in sys.argv:
CMAKE_GENERATOR = 'Visual Studio 17'
elif '--vs2019' in sys.argv:
CMAKE_GENERATOR = 'Visual Studio 16'
elif len(vswhere(17)) > 0:
CMAKE_GENERATOR = 'Visual Studio 17'
elif len(vswhere(16)) > 0:
CMAKE_GENERATOR = 'Visual Studio 16'
elif which('mingw32-make') is not None and which('g++') is not None:
CMAKE_GENERATOR = 'MinGW Makefiles'
else:
# No detected generator
CMAKE_GENERATOR = ''
sys.argv = [a for a in sys.argv if a not in ('--mingw', '--vs2019', '--vs2022')]
# Computes a suitable path prefix to use when building with a given generator.
def cmake_generator_prefix():
if CMAKE_GENERATOR == 'Visual Studio 17':
return '_vs2022'
if CMAKE_GENERATOR == 'Visual Studio 16':
return '_vs2019'
elif CMAKE_GENERATOR == 'MinGW Makefiles':
return '_mingw'
# Unix Makefiles do not specify a path prefix for backwards path compatibility
return ''
# Removes a directory tree even if it was readonly, and doesn't throw exception
# on failure.
def remove_tree(d):
debug_print('remove_tree(' + str(d) + ')')
if not os.path.exists(d):
return
try:
def remove_readonly_and_try_again(func, path, exc_info):
if not (os.stat(path).st_mode & stat.S_IWRITE):
os.chmod(path, stat.S_IWRITE)
func(path)
else:
raise
shutil.rmtree(d, onerror=remove_readonly_and_try_again)
except Exception as e:
debug_print('remove_tree threw an exception, ignoring: ' + str(e))
def win_set_environment_variable_direct(key, value, system=True):
folder = None
try:
if system:
# Read globally from ALL USERS section.
folder = winreg.OpenKeyEx(winreg.HKEY_LOCAL_MACHINE, 'SYSTEM\\CurrentControlSet\\Control\\Session Manager\\Environment', 0, winreg.KEY_ALL_ACCESS)
else:
# Register locally from CURRENT USER section.
folder = winreg.OpenKeyEx(winreg.HKEY_CURRENT_USER, 'Environment', 0, winreg.KEY_ALL_ACCESS)
winreg.SetValueEx(folder, key, 0, winreg.REG_EXPAND_SZ, value)
debug_print('Set key=' + key + ' with value ' + value + ' in registry.')
return True
except Exception as e:
# 'Access is denied.'
if e.args[3] == 5:
exit_with_error('failed to set the environment variable \'' + key + '\'! Setting environment variables permanently requires administrator access. Please rerun this command with administrative privileges. This can be done for example by holding down the Ctrl and Shift keys while opening a command prompt in start menu.')
errlog('Failed to write environment variable ' + key + ':')
errlog(str(e))
return False
finally:
if folder is not None:
folder.Close()
def win_get_environment_variable(key, system=True, user=True, fallback=True):
if (not system and not user and fallback):
# if no --system or --permanent flag is provided use shell's value
return os.environ[key]
try:
folder = None
try:
if system:
# Read globally from ALL USERS section.
folder = winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, 'SYSTEM\\CurrentControlSet\\Control\\Session Manager\\Environment')
else:
# Register locally from CURRENT USER section.
folder = winreg.OpenKey(winreg.HKEY_CURRENT_USER, 'Environment')
value = str(winreg.QueryValueEx(folder, key)[0])
except Exception:
# If reading registry fails for some reason - read via os.environ. This has the drawback
# that expansion items such as %PROGRAMFILES% will have been expanded, so
# need to be precise not to set these back to system registry, or
# expansion items would be lost.
if fallback:
return os.environ[key]
return None
finally:
if folder is not None:
folder.Close()
except Exception as e:
# this catch is if both the registry key threw an exception and the key is not in os.environ
if e.args[0] != 2:
# 'The system cannot find the file specified.'
errlog('Failed to read environment variable ' + key + ':')
errlog(str(e))
return None
return value
def win_set_environment_variable(key, value, system, user):
debug_print('set ' + str(key) + '=' + str(value) + ', in system=' + str(system))
previous_value = win_get_environment_variable(key, system=system, user=user)
if previous_value == value:
debug_print(' no need to set, since same value already exists.')
# No need to elevate UAC for nothing to set the same value, skip.
return False
if not value:
try:
if system:
cmd = ['REG', 'DELETE', 'SYSTEM\\CurrentControlSet\\Control\\Session Manager\\Environment', '/V', key, '/f']
else:
cmd = ['REG', 'DELETE', 'HKCU\\Environment', '/V', key, '/f']
debug_print(str(cmd))
value = subprocess.call(cmd, stdout=subprocess.PIPE)
except Exception:
return False
return True
try:
if win_set_environment_variable_direct(key, value, system):
return True
# Escape % signs so that we don't expand references to environment variables.
value = value.replace('%', '^%')
if len(value) >= 1024:
exit_with_error('the new environment variable ' + key + ' is more than 1024 characters long! A value this long cannot be set via command line: please add the environment variable specified above to system environment manually via Control Panel.')
cmd = ['SETX', key, value]
debug_print(str(cmd))
retcode = subprocess.call(cmd, stdout=subprocess.PIPE)
if retcode != 0:
errlog('ERROR! Failed to set environment variable ' + key + '=' + value + '. You may need to set it manually.')
else:
return True
except Exception as e:
errlog('ERROR! Failed to set environment variable ' + key + '=' + value + ':')
errlog(str(e))
errlog('You may need to set it manually.')
return False
def win_set_environment_variables(env_vars_to_add, system, user):
if not env_vars_to_add:
return
changed = False
for key, value in env_vars_to_add:
if win_set_environment_variable(key, value, system, user):
if not changed:
changed = True
print('Setting global environment variables:')
print(key + ' = ' + value)
if not changed:
print('Global environment variables up to date')
return
# if changes were made then we need to notify other processes
try:
HWND_BROADCAST = ctypes.wintypes.HWND(0xFFFF) # win32con.HWND_BROADCAST == 65535
WM_SETTINGCHANGE = 0x001A # win32con.WM_SETTINGCHANGE == 26
SMTO_BLOCK = 0x0001 # win32con.SMTO_BLOCK == 1
ctypes.windll.user32.SendMessageTimeoutA(
HWND_BROADCAST, # hWnd: notify everyone
WM_SETTINGCHANGE, # Msg: registry changed
0, # wParam: Must be 0 when setting changed is sent by users
'Environment', # lParam: Specifically environment variables changed
SMTO_BLOCK, # fuFlags: Wait for message to be sent or timeout
100) # uTimeout: 100ms
except Exception as e:
errlog('SendMessageTimeout failed with error: ' + str(e))
def win_delete_environment_variable(key, system=True, user=True):
debug_print('win_delete_environment_variable(key=' + key + ', system=' + str(system) + ')')
return win_set_environment_variable(key, None, system, user)
# Returns the absolute pathname to the given path inside the Emscripten SDK.
def sdk_path(path):
if os.path.isabs(path):
return path
return to_unix_path(os.path.join(EMSDK_PATH, path))
# Removes a single file, suppressing exceptions on failure.
def rmfile(filename):
debug_print('rmfile(' + filename + ')')
if os.path.lexists(filename):
os.remove(filename)
# http://stackoverflow.com/questions/600268/mkdir-p-functionality-in-python
def mkdir_p(path):
debug_print('mkdir_p(' + path + ')')
try:
os.makedirs(path)
except OSError as exc: # Python >2.5
if exc.errno != errno.EEXIST or not os.path.isdir(path):
raise
def is_nonempty_directory(path):
if not os.path.isdir(path):
return False
return len(os.listdir(path)) != 0
def run(cmd, cwd=None, quiet=False):
debug_print('run(cmd=' + str(cmd) + ', cwd=' + str(cwd) + ')')
process = subprocess.Popen(cmd, cwd=cwd, env=os.environ.copy())
process.communicate()
if process.returncode != 0 and not quiet:
errlog(str(cmd) + ' failed with error code ' + str(process.returncode) + '!')
return process.returncode
# http://pythonicprose.blogspot.fi/2009/10/python-extract-targz-archive.html
def untargz(source_filename, dest_dir):
print("Unpacking '" + source_filename + "' to '" + dest_dir + "'")
mkdir_p(dest_dir)
returncode = run(['tar', '-xvf' if VERBOSE else '-xf', sdk_path(source_filename), '--strip', '1'], cwd=dest_dir)
# tfile = tarfile.open(source_filename, 'r:gz')
# tfile.extractall(dest_dir)
return returncode == 0
# On Windows, it is not possible to reference path names that are longer than
# ~260 characters, unless the path is referenced via a "\\?\" prefix.
# See https://msdn.microsoft.com/en-us/library/aa365247.aspx#maxpath and http://stackoverflow.com/questions/3555527/python-win32-filename-length-workaround
# In that mode, forward slashes cannot be used as delimiters.
def fix_potentially_long_windows_pathname(pathname):
if not WINDOWS or MSYS:
return pathname
# Test if emsdk calls fix_potentially_long_windows_pathname() with long
# relative paths (which is problematic)
if not os.path.isabs(pathname) and len(pathname) > 200:
errlog('Warning: Seeing a relative path "' + pathname + '" which is dangerously long for being referenced as a short Windows path name. Refactor emsdk to be able to handle this!')
if pathname.startswith('\\\\?\\'):
return pathname
pathname = os.path.normpath(pathname.replace('/', '\\'))
if MINGW:
# MinGW versions of Python return normalized paths with backslashes
# converted to forward slashes, so we must use forward slashes in our
# prefix
return '//?/' + pathname
return '\\\\?\\' + pathname
# On windows, rename/move will fail if the destination exists, and there is no
# race-free way to do it. This method removes the destination if it exists, so
# the move always works
def move_with_overwrite(src, dest):
if os.path.exists(dest):
os.remove(dest)
os.rename(src, dest)
# http://stackoverflow.com/questions/12886768/simple-way-to-unzip-file-in-python-on-all-oses
def unzip(source_filename, dest_dir):
print("Unpacking '" + source_filename + "' to '" + dest_dir + "'")
mkdir_p(dest_dir)
common_subdir = None
try:
with zipfile.ZipFile(source_filename) as zf:
# Implement '--strip 1' behavior to unzipping by testing if all the files
# in the zip reside in a common subdirectory, and if so, we move the
# output tree at the end of uncompression step.
for member in zf.infolist():
words = member.filename.split('/')
if len(words) > 1: # If there is a directory component?
if common_subdir is None:
common_subdir = words[0]
elif common_subdir != words[0]:
common_subdir = None
break
else:
common_subdir = None
break
unzip_to_dir = dest_dir
if common_subdir:
unzip_to_dir = os.path.join(os.path.dirname(dest_dir), 'unzip_temp')
# Now do the actual decompress.
for member in zf.infolist():
zf.extract(member, fix_potentially_long_windows_pathname(unzip_to_dir))
dst_filename = os.path.join(unzip_to_dir, member.filename)
# See: https://stackoverflow.com/questions/42326428/zipfile-in-python-file-permission
unix_attributes = member.external_attr >> 16
if unix_attributes:
os.chmod(dst_filename, unix_attributes)
# Move the extracted file to its final location without the base
# directory name, if we are stripping that away.
if common_subdir:
if not member.filename.startswith(common_subdir):
raise Exception('Unexpected filename "' + member.filename + '"!')
stripped_filename = '.' + member.filename[len(common_subdir):]
final_dst_filename = os.path.join(dest_dir, stripped_filename)
# Check if a directory
if stripped_filename.endswith('/'):
d = fix_potentially_long_windows_pathname(final_dst_filename)
if not os.path.isdir(d):
os.mkdir(d)
else:
parent_dir = os.path.dirname(fix_potentially_long_windows_pathname(final_dst_filename))
if parent_dir and not os.path.exists(parent_dir):
os.makedirs(parent_dir)
move_with_overwrite(fix_potentially_long_windows_pathname(dst_filename), fix_potentially_long_windows_pathname(final_dst_filename))
if common_subdir:
remove_tree(unzip_to_dir)
except zipfile.BadZipfile as e:
errlog("Unzipping file '" + source_filename + "' failed due to reason: " + str(e) + "! Removing the corrupted zip file.")
rmfile(source_filename)
return False
except Exception as e:
errlog("Unzipping file '" + source_filename + "' failed due to reason: " + str(e))
return False
return True
# This function interprets whether the given string looks like a path to a
# directory instead of a file, without looking at the actual filesystem.
# 'a/b/c' points to directory, so does 'a/b/c/', but 'a/b/c.x' is parsed as a
# filename
def path_points_to_directory(path):
if path == '.':
return True
last_slash = max(path.rfind('/'), path.rfind('\\'))
last_dot = path.rfind('.')
no_suffix = last_dot < last_slash or last_dot == -1
if no_suffix:
return True
suffix = path[last_dot:]
# Very simple logic for the only file suffixes used by emsdk downloader. Other
# suffixes, like 'clang-3.2' are treated as dirs.
if suffix in ('.exe', '.zip', '.txt'):
return False
else:
return True
def get_content_length(download):
try:
meta = download.info()
if hasattr(meta, "getheaders") and hasattr(meta.getheaders, "Content-Length"):
return int(meta.getheaders("Content-Length")[0])
elif hasattr(download, "getheader") and download.getheader('Content-Length'):
return int(download.getheader('Content-Length'))
elif hasattr(meta, "getheader") and meta.getheader('Content-Length'):
return int(meta.getheader('Content-Length'))
except Exception:
pass
return 0
def get_download_target(url, dstpath, filename_prefix=''):
file_name = filename_prefix + url.split('/')[-1]
if path_points_to_directory(dstpath):
file_name = os.path.join(dstpath, file_name)
else:
file_name = dstpath
# Treat all relative destination paths as relative to the SDK root directory,
# not the current working directory.
file_name = sdk_path(file_name)
return file_name
def download_with_curl(url, file_name):
print("Downloading: %s from %s" % (file_name, url))
if not which('curl'):
exit_with_error('curl not found in PATH')
# -#: show progress bar
# -L: Follow HTTP 3XX redirections
# -f: Fail on HTTP errors
subprocess.check_call(['curl', '-#', '-f', '-L', '-o', file_name, url])
def download_with_urllib(url, file_name):
u = urlopen(url)
with open(file_name, 'wb') as f:
file_size = get_content_length(u)
if file_size > 0:
print("Downloading: %s from %s, %s Bytes" % (file_name, url, file_size))
else:
print("Downloading: %s from %s" % (file_name, url))
file_size_dl = 0
# Draw a progress bar 80 chars wide (in non-TTY mode)
progress_max = 80 - 4
progress_shown = 0
block_sz = 256 * 1024
if not TTY_OUTPUT:
print(' [', end='')
while True:
buffer = u.read(block_sz)
if not buffer:
break
file_size_dl += len(buffer)
f.write(buffer)
if file_size:
percent = file_size_dl * 100.0 / file_size
if TTY_OUTPUT:
status = r" %10d [%3.02f%%]" % (file_size_dl, percent)
print(status, end='\r')
else:
while progress_shown < progress_max * percent / 100:
print('-', end='')
sys.stdout.flush()
progress_shown += 1
if not TTY_OUTPUT:
print(']')
sys.stdout.flush()
# On success, returns the filename on the disk pointing to the destination file that was produced
# On failure, returns None.
def download_file(url, dstpath, download_even_if_exists=False,
filename_prefix='', silent=False):
debug_print('download_file(url=' + url + ', dstpath=' + dstpath + ')')
file_name = get_download_target(url, dstpath, filename_prefix)
if os.path.exists(file_name) and not download_even_if_exists:
print("File '" + file_name + "' already downloaded, skipping.")
return file_name
mkdir_p(os.path.dirname(file_name))
try:
# Use curl on macOS to avoid CERTIFICATE_VERIFY_FAILED issue with
# python's urllib:
# https://stackoverflow.com/questions/40684543/how-to-make-python-use-ca-certificates-from-mac-os-truststore
# Unlike on linux or windows, curl is always available on macOS systems.
if MACOS:
download_with_curl(url, file_name)
else:
download_with_urllib(url, file_name)
except Exception as e:
errlog("Error: Downloading URL '" + url + "': " + str(e))
return None
except KeyboardInterrupt:
rmfile(file_name)
raise
return file_name
def run_get_output(cmd, cwd=None):
debug_print('run_get_output(cmd=' + str(cmd) + ', cwd=' + str(cwd) + ')')
process = subprocess.Popen(cmd, cwd=cwd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE, env=os.environ.copy(), universal_newlines=True)
stdout, stderr = process.communicate()
return (process.returncode, stdout, stderr)
cached_git_executable = None
# must_succeed: If false, the search is performed silently without printing out
# errors if not found. Empty string is returned if git is not found.
# If true, the search is required to succeed, and the execution
# will terminate with sys.exit(1) if not found.
def GIT(must_succeed=True):
global cached_git_executable
if cached_git_executable is not None:
return cached_git_executable
# The order in the following is important, and specifies the preferred order
# of using the git tools. Primarily use git from emsdk if installed. If not,
# use system git.
gits = ['git/1.9.4/bin/git.exe', which('git')]
for git in gits:
try:
ret, stdout, stderr = run_get_output([git, '--version'])
if ret == 0:
cached_git_executable = git
return git
except:
pass
if must_succeed:
if WINDOWS:
msg = "git executable was not found. Please install it by typing 'emsdk install git-1.9.4', or alternatively by installing it manually from http://git-scm.com/downloads . If you install git manually, remember to add it to PATH"
elif MACOS:
msg = "git executable was not found. Please install git for this operation! This can be done from http://git-scm.com/ , or by installing XCode and then the XCode Command Line Tools (see http://stackoverflow.com/questions/9329243/xcode-4-4-command-line-tools )"
elif LINUX:
msg = "git executable was not found. Please install git for this operation! This can be probably be done using your package manager, see http://git-scm.com/book/en/Getting-Started-Installing-Git"
else:
msg = "git executable was not found. Please install git for this operation!"
exit_with_error(msg)
# Not found
return ''
def git_repo_version(repo_path):
returncode, stdout, stderr = run_get_output([GIT(), 'log', '-n', '1', '--pretty="%aD %H"'], cwd=repo_path)
if returncode == 0:
return stdout.strip()
else:
return ""
def git_recent_commits(repo_path, n=20):
returncode, stdout, stderr = run_get_output([GIT(), 'log', '-n', str(n), '--pretty="%H"'], cwd=repo_path)
if returncode == 0:
return stdout.strip().replace('\r', '').replace('"', '').split('\n')
else:
return []
def git_clone(url, dstpath, branch):
debug_print('git_clone(url=' + url + ', dstpath=' + dstpath + ')')
if os.path.isdir(os.path.join(dstpath, '.git')):
debug_print("Repository '" + url + "' already cloned to directory '" + dstpath + "', skipping.")
return True
mkdir_p(dstpath)
git_clone_args = ['--recurse-submodules', '--branch', branch] # Do not check out a branch (installer will issue a checkout command right after)
if GIT_CLONE_SHALLOW:
git_clone_args += ['--depth', '1']
print('Cloning from ' + url + '...')
return run([GIT(), 'clone'] + git_clone_args + [url, dstpath]) == 0
def git_pull(repo_path, branch_or_tag):
debug_print('git_pull(repo_path=' + repo_path + ', branch/tag=' + branch_or_tag + ')')
ret = run([GIT(), 'fetch', '--quiet', 'origin'], repo_path)
if ret != 0:
return False
try:
print("Fetching latest changes to the branch/tag '" + branch_or_tag + "' for '" + repo_path + "'...")
ret = run([GIT(), 'fetch', '--quiet', 'origin'], repo_path)
if ret != 0:
return False
# this line assumes that the user has not gone and manually messed with the
# repo and added new remotes to ambiguate the checkout.
ret = run([GIT(), 'checkout', '--recurse-submodules', '--quiet', branch_or_tag], repo_path)
if ret != 0:
return False
# Test if branch_or_tag is a branch, or if it is a tag that needs to be updated
target_is_tag = run([GIT(), 'symbolic-ref', '-q', 'HEAD'], repo_path, quiet=True)
if not target_is_tag:
# update branch to latest (not needed for tags)
# this line assumes that the user has not gone and made local changes to the repo
ret = run([GIT(), 'merge', '--ff-only', 'origin/' + branch_or_tag], repo_path)
if ret != 0:
return False
run([GIT(), 'submodule', 'update', '--init'], repo_path, quiet=True)
except:
errlog('git operation failed!')
return False
print("Successfully updated and checked out branch/tag '" + branch_or_tag + "' on repository '" + repo_path + "'")
print("Current repository version: " + git_repo_version(repo_path))
return True
def git_clone_checkout_and_pull(url, dstpath, branch):
debug_print('git_clone_checkout_and_pull(url=' + url + ', dstpath=' + dstpath + ', branch=' + branch + ')')
# If the repository has already been cloned before, issue a pull operation. Otherwise do a new clone.
if os.path.isdir(os.path.join(dstpath, '.git')):
return git_pull(dstpath, branch)
else:
return git_clone(url, dstpath, branch)
# Each tool can have its own build type, or it can be overridden on the command
# line.
def decide_cmake_build_type(tool):
if CMAKE_BUILD_TYPE_OVERRIDE:
return CMAKE_BUILD_TYPE_OVERRIDE
else:
return tool.cmake_build_type
# The root directory of the build.
def llvm_build_dir(tool):
generator_suffix = cmake_generator_prefix()
bitness_suffix = '_32' if tool.bitness == 32 else '_64'
if hasattr(tool, 'git_branch'):
build_dir = 'build_' + tool.git_branch.replace(os.sep, '-') + generator_suffix + bitness_suffix
else:
build_dir = 'build_' + tool.version + generator_suffix + bitness_suffix
return build_dir
def exe_suffix(filename):
if WINDOWS and not filename.endswith('.exe'):
filename += '.exe'
return filename
# The directory where the binaries are produced. (relative to the installation
# root directory of the tool)
def llvm_build_bin_dir(tool):
build_dir = llvm_build_dir(tool)
if WINDOWS and 'Visual Studio' in CMAKE_GENERATOR:
old_llvm_bin_dir = os.path.join(build_dir, 'bin', decide_cmake_build_type(tool))
new_llvm_bin_dir = None
default_cmake_build_type = decide_cmake_build_type(tool)
cmake_build_types = [default_cmake_build_type, 'Release', 'RelWithDebInfo', 'MinSizeRel', 'Debug']
for build_type in cmake_build_types:
d = os.path.join(build_dir, build_type, 'bin')
if os.path.isfile(os.path.join(tool.installation_path(), d, exe_suffix('clang'))):
new_llvm_bin_dir = d
break
if new_llvm_bin_dir and os.path.exists(os.path.join(tool.installation_path(), new_llvm_bin_dir)):
return new_llvm_bin_dir
elif os.path.exists(os.path.join(tool.installation_path(), old_llvm_bin_dir)):
return old_llvm_bin_dir
return os.path.join(build_dir, default_cmake_build_type, 'bin')
else:
return os.path.join(build_dir, 'bin')
def build_env(generator):
build_env = os.environ.copy()
# To work around a build issue with older Mac OS X builds, add -stdlib=libc++ to all builds.
# See https://groups.google.com/forum/#!topic/emscripten-discuss/5Or6QIzkqf0
if MACOS:
build_env['CXXFLAGS'] = ((build_env['CXXFLAGS'] + ' ') if hasattr(build_env, 'CXXFLAGS') else '') + '-stdlib=libc++'
if WINDOWS:
# MSBuild.exe has an internal mechanism to avoid N^2 oversubscription of threads in its two-tier build model, see
# https://devblogs.microsoft.com/cppblog/improved-parallelism-in-msbuild/
build_env['UseMultiToolTask'] = 'true'
build_env['EnforceProcessCountAcrossBuilds'] = 'true'
return build_env
def make_build(build_root, build_type):
debug_print('make_build(build_root=' + build_root + ', build_type=' + build_type + ')')
if CPU_CORES > 1:
print('Performing a parallel build with ' + str(CPU_CORES) + ' cores.')
else:
print('Performing a singlethreaded build.')
make = ['cmake', '--build', '.', '--config', build_type]
if 'Visual Studio' in CMAKE_GENERATOR:
# Visual Studio historically has had a two-tier problem in its build system design. A single MSBuild.exe instance only governs
# the build of a single project (.exe/.lib/.dll) in a solution. Passing the -j parameter above will only enable multiple MSBuild.exe
# instances to be spawned to build multiple projects in parallel, but each MSBuild.exe is still singlethreaded.
# To enable each MSBuild.exe instance to also compile several .cpp files in parallel inside a single project, pass the extra
# MSBuild.exe specific "Multi-ToolTask" (MTT) setting /p:CL_MPCount. This enables each MSBuild.exe to parallelize builds wide.
# This requires CMake 3.12 or newer.
make += ['-j', str(CPU_CORES), '--', '/p:CL_MPCount=' + str(CPU_CORES)]
else:
# Pass -j to native make, CMake might not support -j option.
make += ['--', '-j', str(CPU_CORES)]
# Build
try:
print('Running build: ' + str(make))
ret = subprocess.check_call(make, cwd=build_root, env=build_env(CMAKE_GENERATOR))
if ret != 0:
errlog('Build failed with exit code ' + ret + '!')
errlog('Working directory: ' + build_root)
return False
except Exception as e:
errlog('Build failed due to exception!')
errlog('Working directory: ' + build_root)
errlog(str(e))
return False
return True
def cmake_configure(generator, build_root, src_root, build_type, extra_cmake_args=[]):
debug_print('cmake_configure(generator=' + str(generator) + ', build_root=' + str(build_root) + ', src_root=' + str(src_root) + ', build_type=' + str(build_type) + ', extra_cmake_args=' + str(extra_cmake_args) + ')')
# Configure
if not os.path.isdir(build_root):
# Create build output directory if it doesn't yet exist.
os.mkdir(build_root)
try:
if generator:
generator = ['-G', generator]
else:
generator = []
cmdline = ['cmake'] + generator + ['-DCMAKE_BUILD_TYPE=' + build_type, '-DPYTHON_EXECUTABLE=' + sys.executable]
# Target macOS 10.14 at minimum, to support widest range of Mac devices
# from "Early 2008" and newer:
# https://en.wikipedia.org/wiki/MacBook_(2006-2012)#Supported_operating_systems
cmdline += ['-DCMAKE_OSX_DEPLOYMENT_TARGET=10.14']
cmdline += extra_cmake_args + [src_root]
print('Running CMake: ' + str(cmdline))
# Specify the deployment target also as an env. var, since some Xcode versions
# read this instead of the CMake field.
os.environ['MACOSX_DEPLOYMENT_TARGET'] = '10.14'
def quote_parens(x):
if ' ' in x:
return '"' + x.replace('"', '\\"') + '"'
else: