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#!/usr/bin/env python
from __future__ import with_statement, print_function, unicode_literals
import os
import re
import shlex
try:
from shutil import which
except ImportError:
def which(cmd, mode=os.F_OK | os.X_OK, path=None):
"""Given a command, mode, and a PATH string, return the path which
conforms to the given mode on the PATH, or None if there is no such
file.
`mode` defaults to os.F_OK | os.X_OK. `path` defaults to the result
of os.environ.get("PATH"), or can be overridden with a custom search
path.
"""
# Check that a given file can be accessed with the correct mode.
# Additionally check that `file` is not a directory, as on Windows
# directories pass the os.access check.
def _access_check(fn, mode):
return (os.path.exists(fn) and os.access(fn, mode)
and not os.path.isdir(fn))
# If we're given a path with a directory part, look it up directly rather
# than referring to PATH directories. This includes checking relative to the
# current directory, e.g. ./script
if os.path.dirname(cmd):
if _access_check(cmd, mode):
return cmd
return None
if path is None:
path = os.environ.get("PATH", os.defpath)
if not path:
return None
path = path.split(os.pathsep)
if platform == "win32":
# The current directory takes precedence on Windows.
if not os.curdir in path:
path.insert(0, os.curdir)
# PATHEXT is necessary to check on Windows.
pathext = os.environ.get("PATHEXT", "").split(os.pathsep)
# See if the given file matches any of the expected path extensions.
# This will allow us to short circuit when given "python.exe".
# If it does match, only test that one, otherwise we have to try
# others.
if any(cmd.lower().endswith(ext.lower()) for ext in pathext):
files = [cmd]
else:
files = [cmd + ext for ext in pathext]
else:
# On other platforms you don't have things like PATHEXT to tell you
# what file suffixes are executable, so just pass on cmd as-is.
files = [cmd]
seen = set()
for dir in path:
normdir = os.path.normcase(dir)
if not normdir in seen:
seen.add(normdir)
for thefile in files:
name = os.path.join(dir, thefile)
if _access_check(name, mode):
return name
return None
from subprocess import CalledProcessError, STDOUT, check_call, check_output, list2cmdline
try:
from subprocess import DEVNULL
except ImportError:
DEVNULL = open(os.devnull, 'wb')
from sys import platform, stderr
cmds = {}
warnings = []
class CheckError(Exception):
pass
def checking(thing):
stderr.write("checking %s... " % thing)
stderr.flush()
def warn(string):
warnings.append(string)
stderr.write("WARNING: %s\n" % string)
def check(name, why, flags=[], optional=False, var=None, run=True):
global warn
checking("for %s" % name)
var = var or name.upper()
varvalue = os.getenv(var)
if varvalue == '':
stderr.write("skipping\n")
if not optional:
warn("%s is required to %s, the code will not fall back gracefully without it!" % (name, why))
return
elif varvalue is None:
varvalue = name
split = shlex.split(varvalue)
exe = which(split[0])
if not exe:
stderr.write("not found\n")
if not optional:
raise CheckError()
else:
warn("%s is recommended to %s." % (name, why))
return
stderr.write("%s\n" % exe)
cmd = [exe] + split[1:] + flags + shlex.split(os.getenv(var + "FLAGS") or "")
if run:
checking("%s usability" % exe)
try:
check_call(cmd + ["-h"], stdout=DEVNULL, stderr=STDOUT)
stderr.write("yes\n")
except CalledProcessError as e:
raise CheckError(e)
cmds[var] = cmd
return cmd
def run_ffmpeg(arg):
return check_output(ffmpeg + [arg], stderr=STDOUT).decode('utf-8')
def ffmpeg_check(name, regex, checks, output):
for check in checks:
checking("if %s supports %s %s" % (ffmpeg[0], name, check))
if re.search("\n %s %s " % (regex, check), output):
stderr.write("yes\n")
else:
stderr.write("no\n")
raise CheckError()
if __name__ == "__main__":
# no, this line isn't bugged. really. examine check() and Makefile
if not check("zopfli", "compress gzip files better than gzip -9", optional=True, var="GZIP"):
check("gzip", "pre-compress the JSON files", ["-9"])
check("apngasm", "assemble the click-to-continue image", run=False)
check("convert", "perform miscellaneous actions on the images", run=False)
check("cwebp", "convert all images to WebP for webkit browsers", ["-quiet", "-alpha_cleanup", "-m", "6"])
ffmpeg = check("ffmpeg", "convert audio and video to HTML5 formats", ["-v", "warning", "-y"], run=False)
if ffmpeg:
ffmpeg_formats = run_ffmpeg("-formats")
ffmpeg_check("demuxing", "D.", ["matroska,webm", "ogg", "wav", "yuv4mpegpipe"], ffmpeg_formats)
ffmpeg_check("muxing", ".E", ["ipod", "mp4", "ogg", "wav", "webm", "yuv4mpegpipe"], ffmpeg_formats)
ffmpeg_check("decoding", ".{6}", ["mpeg4", "rawvideo", "pcm_s16le", "vorbis"], run_ffmpeg("-decoders"))
ffmpeg_check("encoding", ".{6}", ["libx264", "rawvideo", "libtheora", "libvpx", "libvpx-vp9", "libfdk_aac", "libopus", "pcm_s16le"], run_ffmpeg("-encoders"))
check("npm", "install uglifyjs", run=False)
check("webpmux", "assemble the WebP click-to-continue image")
check("defluff", "decrease the size of DEFLATE files including gzip and PNG files", optional=True, run=False)
check("pngquant", "quantize PNG images, improving compatibility and dramatically decreasing size", optional=True)
check("zopflipng", "recompress DEFLATE files including gzip and PNG files", optional=True)
stderr.write("creating Makefile.inc\n")
with open("Makefile.inc", "w") as f:
f.write(''.join('%s := %s\n' % (k, list2cmdline(cmds[k])) for k in cmds))
stderr.write("Making various directories\n")
os.mkdir("www/json")
if len(warnings):
stderr.write("Warnings during configuration:\n")
stderr.write('\n'.join(warnings) + '\n')
stderr.write("Run `make' now to build HTML5KS.\n")
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