SConstruct

#!/bin/env python3
# -*- python -*-

# The MIT License (MIT)

# Copyright (c) 2015 tyf00@aliyun.com (https://github.com/TimeExceed/water)

# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:

# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

import os
import os.path as op
import stat
import shutil as sh
import subprocess as sp
import random
from datetime import datetime
import hashlib
import zipfile
import re
import collections

env = Environment()
mode = ARGUMENTS.get('mode', 'debug')
env['BUILD_DIR'] = env.Dir('build/%s' % mode)
env['TMP_DIR_PATTERN'] = '$BUILD_DIR/tmp/%s.%s.%s/'
env['RANDOM'] = random.Random()
env['HEADER_DIR'] = env.Dir('$BUILD_DIR/include')
env['BIN_DIR'] = env.Dir('$BUILD_DIR/bin')
env['LIB_DIR'] = env.Dir('$BUILD_DIR/lib')
env.SetOption('duplicate', 'soft-hard-copy')
env.Decider('MD5')

# helper functions

def detectLua():
    if op.exists('/usr/bin/lua5.3'):
        return '/usr/bin/lua5.3'
    elif op.exists('/usr/bin/lua5.2'):
        return '/usr/bin/lua5.2'
    else:
        return None


def newTmpDir(env, usr):
    ts = datetime.utcnow()
    ts = ts.strftime('%Y%m%dT%H%M%S.%f')
    salt = env['RANDOM'].randint(0, 10000)
    d = env.Dir(env['TMP_DIR_PATTERN'] % (usr, ts, salt))
    os.makedirs(d.path)
    return d

env.AddMethod(newTmpDir)

def subDir(env, subd):
    env.SConscript('%s/SConscript' % subd, exports='env')

env.AddMethod(subDir)

_Glob = env.Glob
def Glob(pathname, ondisk=True, source=False, strings=False):
    fs = _Glob(pathname, ondisk, source, strings)
    fs.sort(key=lambda x:x.path)
    return fs
env.Glob = Glob

def symlink(src, dst):
    if op.islink(src):
        src = os.readlink(src)
    if op.isdir(dst):
        base = op.basename(src)
        dst = op.join(dst, base)
    os.symlink(op.abspath(src), dst)

# prepare build dir

def makeBuildDir():
    for d in [env['BUILD_DIR'], env['HEADER_DIR']]:
        d = d.abspath
        if not op.exists(d):
            os.makedirs(d)
        assert op.isdir(d)

def cleanBuildDir():
    buildDir = env['BUILD_DIR'].abspath
    for rt, dirs, files in os.walk(buildDir):
        try:
            dirs.remove('.git')
        except:
            pass
        for f in files:
            f = op.join(rt, f)
            if op.islink(f) or f.endswith('.gcno') or f.endswith('.gcda'):
                os.remove(f)

def firstDirname(p):
    x = p
    y = op.dirname(p)
    while len(y) > 0:
        x = y
        y = op.dirname(x)
    return x

def cloneFile(rt, fn):
    d = op.join(env['BUILD_DIR'].path, rt)
    if not op.exists(d):
        os.makedirs(d)
    src = op.abspath(op.join(rt, fn))
    dst = op.join(d, fn)
    try:
        os.symlink(src, dst)
    except:
        print(src, '->', dst)
        raise

def cloneWorkSpace():
    buildDir = firstDirname(env['BUILD_DIR'].path)
    paths = os.listdir('.')
    for x in [buildDir, '.git', '.gitignore', '.sconsign.dblite', 'SConstruct']:
        try:
            paths.remove(x)
        except:
            pass
    for x in paths:
        if op.isfile(x):
            cloneFile('', x)
        if op.isdir(x):
            for rt, _, files in os.walk(x):
                for f in files:
                    cloneFile(rt, f)

makeBuildDir()
cleanBuildDir()
cloneWorkSpace()


# for clojure

def cloneInto(dstDir, srcs):
    for x in srcs:
        if x.isdir():
            dstRt = op.join(dstDir, op.basename(x.path))
            if not op.exists(dstRt):
                os.mkdir(dstRt)
            for rt, dirs, files in os.walk(x.path):
                for d in dirs:
                    d = x.rel_path(env.Dir(rt).Dir(d))
                    d = op.join(dstRt, d)
                    if not op.exists(d):
                        os.mkdir(d)
                for f in files:
                    g = x.rel_path(env.Dir(rt).File(f))
                    g = op.join(dstRt, g)
                    symlink(op.join(rt, f), g)
        else:
            symlink(x.path, op.join(dstDir, op.basename(x.path)))

def writeManifest(workdir, kws):
    if 'MANIFEST' not in kws:
        return None
    items = kws['MANIFEST']
    fn = op.join(workdir, 'manifest')
    with open(fn, 'w') as f:
        for k, v in items.items():
            f.write('%s: %s\n' % (k, v))
    return fn

def jar(env, target, source, **kwargs):
    def _jar(target, source, env):
        assert len(target) == 1
        dstJar = env.File(target[0])

        srcs = env.Flatten([source])
        for x in srcs:
            assert x.exists()

        workdir = env.newTmpDir('jar').path

        cloneInto(workdir, srcs)
        manifest = writeManifest(workdir, kwargs)

        tmpJar = op.join(workdir, op.basename(dstJar.path))
        if manifest:
            sp.check_call(['jar', 'cfm', tmpJar, manifest, '-C', workdir, '.'])
        else:
            sp.check_call(['jar', 'cf', tmpJar, '-C', workdir, '.'])
        sp.check_call(['jar', 'i', tmpJar])
        os.link(tmpJar, dstJar.path)
    env.Command(target, source, _jar)
    target = env.File(target)
    for x in source:
        if x.isdir():
            for rt, _, files in os.walk(x.abspath):
                for f in files:
                    env.Depends(target, env.File(op.join(rt, f)))
        else:
            env.Depends(target, x)
    return target

env.AddMethod(jar)

def _javac(target, source, env):
    target = target[0]
    source = source[0]
    tdir = env.newTmpDir('javac')
    srcs = []
    for rt, _, files in os.walk(source.path):
        for f in files:
            if f.endswith('.java'):
                srcs.append(op.join(rt, f))
    if '_JAVAC_CLASSPATH' in env:
        sp.check_call(['javac', '-sourcepath', source.path, '-d', tdir.path, '-cp', env['_JAVAC_CLASSPATH']] + srcs)
    else:
        sp.check_call(['javac', '-sourcepath', source.path, '-d', tdir.path] + srcs)
    for rt, _, files in os.walk(source.path):
        for f in files:
            if not f.endswith('.java'):
                from_ = op.join(rt, f)
                to = op.join(tdir.path, op.relpath(rt, source.path), f)
                symlink(from_, to)
    manifest = writeManifest(tdir.path, env)

    tmpJar = op.join(tdir.path, op.basename(target.path))
    if manifest:
        sp.check_call(['jar', 'cfm', tmpJar, manifest, '-C', tdir.path, '.'])
    else:
        sp.check_call(['jar', 'cf', tmpJar, '-C', tdir.path, '.'])
    sp.check_call(['jar', 'i', tmpJar])
    os.link(tmpJar, target.path)

def javac(env, target, source, **kwargs):
    tenv = env
    if 'LIBS' in kwargs:
        cp = ':'.join(x.path for x in env.Flatten(kwargs['LIBS']))
        tenv = env.Clone()
        tenv['_JAVAC_CLASSPATH'] = cp
    if 'MANIFEST' in kwargs:
        if tenv == env:
            tenv = env.Clone()
        tenv['MANIFEST'] = kwargs['MANIFEST']
    target = env.File(target)
    source = env.Dir(source)
    tenv.Command(target, source, _javac)
    target = env.File(target)
    for rt, _, files in os.walk(source.abspath):
        for f in files:
            env.Depends(target, env.File(op.join(rt, f)))


env.AddMethod(javac)

def zipper(target, source, env):
    assert len(target) == 1
    target = target[0]
    with zipfile.ZipFile(target.abspath, 'w') as zf:
        for x in source:
            zf.write(x.abspath, op.basename(x.path))

env.Append(BUILDERS={'zip': Builder(action=zipper, suffix='.zip')})

def download(env, target, source):
    target = env.File(target)
    if not op.exists(target.abspath):
        sp.check_call(['wget', '-c', '-O', target.abspath, source])
    return target

env.AddMethod(download)

def extract(env, target, source):
    tt = target
    ss = source
    def _extract(target, source, env):
        with zipfile.ZipFile(ss.abspath, 'r') as zf:
            zf.extractall(op.dirname(ss.abspath), tt)
    _target = env.Command(target, source, _extract)
    env.Depends(_target, source)
    return _target

env.AddMethod(extract)

# for C/C++

flags = {
    'CFLAGS': ['--std=c11'],
    'CXXFLAGS': ['--std=c++11'],
    'CCFLAGS': ['-Wall', '-Wfloat-equal',
                '-g', '-gdwarf-4',
                '-I%s' % env['HEADER_DIR'].path],
    'LINKFLAGS': ['-Wl,-E']}
if mode == 'debug':
    flags['CCFLAGS'] += ['-O0', '--coverage', '-fsanitize=address', '-fvar-tracking-assignments']
    flags['LINKFLAGS'] += ['--coverage', '-fsanitize=address']
elif mode == 'release':
    flags['CCFLAGS'] += ['-O2', '-Werror', '-DNDEBUG']
env.MergeFlags(flags)

_extLibs = set([])
_libDeps = {}

def libDeps(env, lib, deps):
    if lib in _libDeps:
        _libDeps[lib] |= set(deps)
    else:
        _libDeps[lib] = set(deps)
env.AddMethod(libDeps)

def countDepends(init, deps):
    q = collections.deque(init)
    depCnts = dict((x, 0) for x in init)
    while len(q) > 0:
        x = q.popleft()
        if x in deps:
            for y in deps[x]:
                if y in depCnts:
                    depCnts[y] += 1
                else:
                    depCnts[y] = 1
                    q.append(y)
    return depCnts

def popNoDeps(depCnts, deps):
    while len(depCnts) > 0:
        for key, cnt in depCnts.items():
            if cnt == 0:
                break
        del depCnts[key]
        for x in deps.get(key, []):
            depCnts[x] -= 1
        yield key

def topologicalSort(init, deps):
    depCnts = countDepends(init, deps)
    return [x for x in popNoDeps(depCnts, deps)]


_Program = env.Program
def Program(env, target=None, source=None, **kwargs):
    if 'LIBS' in kwargs:
        global _libDeps
        libs = topologicalSort(set(kwargs['LIBS']), _libDeps)
        kwargs['LIBS'] = libs
    p = _Program(target, source, **kwargs)
    if 'LIBS' in kwargs:
        for x in kwargs['LIBS']:
            if x not in _extLibs:
                env.Depends(p, env.File('$LIB_DIR/lib%s.a' % x))
    env.Install('$BIN_DIR', p)
    return p
env.AddMethod(Program)

def Header(env, base, src):
    base = env.Dir('$HEADER_DIR').Dir(base)
    if not op.exists(base.abspath):
        os.makedirs(base.abspath)
    src = Flatten(src)
    for src in src:
        if src.isfile():
            src = src.abspath
            des = base.File(op.basename(src)).abspath
            os.symlink(src, des)
        else:
            src = src.abspath
            base = base.abspath
            for rt, dirs, files in os.walk(src):
                for d in dirs:
                    d = op.join(base, op.relpath(op.join(rt, d), src))
                    if not op.exists(d):
                        os.mkdir(d)
                for f in files:
                    s = op.join(rt, f)
                    d = op.join(base, op.relpath(s, src))
                    os.symlink(s, d)
env.AddMethod(Header)

env['BUILDERS']['Object'] = env['BUILDERS']['SharedObject']
env['BUILDERS']['StaticObject'] = env['BUILDERS']['SharedObject']

# for latex

def pathInFs(fs):
    return fs.abspath

def calcAuxDigest(tex, pdfDir):
    aux = os.path.join(pdfDir, os.path.splitext(os.path.basename(tex))[0] + '.aux')
    if os.path.exists(aux):
        digest = hashlib.md5()
        with open(aux) as f:
            digest.update(f.read())
        return digest.digest()
    else:
        return ''

def runLuaLatex(env, tex, pdf):
    with open(tex) as fp:
        content = fp.read()
    for m in re.finditer('\\\\includegraphics.*?[{](.*?)[}]', content):
        print(tex, 'depends on', m.group(1))
        env.Depends(tex, m.group(1))

    pdfDir = op.dirname(pdf)
    aux = calcAuxDigest(tex, pdfDir)
    while True:
        sp.check_call(['lualatex', '-shell-escape', tex], cwd=pdfDir)
        newAux = calcAuxDigest(tex, pdfDir)
        if aux == newAux:
            break
        aux = newAux

def latex(target, source, env):
    assert len(target) == len(source)
    for pdf, tex in zip(map(pathInFs, target), map(pathInFs, source)):
        runLuaLatex(env, tex, pdf)

env.Append(BUILDERS={'Latex': Builder(action=latex, suffix='.pdf')})

def beamer(target, source, env):
    assert len(source) == 1
    source = source[0].abspath
    with open(source) as fp:
        source = fp.read()

    assert len(target) == 2
    replacements = [
        '\setbeameroption{show notes}',
        '\setbeameroption{hide notes}',
    ]
    target_pdf = [x.abspath for x in target]
    target_tex = [op.splitext(x)[0] + '.tex' for x in target_pdf]
    for tex, rep in zip(target_tex, replacements):
        with open(tex, 'w') as fp:
            fp.write(source.replace('% $BEAMER_NOTES', rep))
    for tex, pdf in zip(target_tex, target_pdf):
        runLuaLatex(env, tex, pdf)

def beamerEmitter(target, source, env):
    assert len(target) == 1
    tgt = op.splitext(target[0].abspath)[0]
    target = [
        env.File(tgt + '.notes.pdf'),
        env.File(tgt + '.no_notes.pdf'),
    ]
    return target, source

bld = Builder(
    action = beamer,
    suffix = '.pdf',
    emitter = beamerEmitter,
)
env.Append(BUILDERS={'Beamer': bld})

def luamp(env, source):
    if 'LUA' not in env:
        LUA = detectLua()
        if LUA:
            env['LUA'] = LUA
        else:
            raise Exception("undetect lua interpreter")

    def build(target, source, env):
        base, source = op.split(source[0].path)
        source, _ = op.splitext(source)
        with open(op.join(base, source + '.mp'), 'w') as fp:
            sp.check_call([env['LUA'], source + '.lua'], stdout=fp, cwd=base)
        sp.check_call(['/usr/bin/mptopdf', '--latex', source + '.mp'], cwd=base)
        os.rename(op.join(base, source + '-0.pdf'), op.join(base, source + '.pdf'))

    source = op.basename(env.File(source).path)
    root, _ = op.splitext(op.basename(source))
    target = env.File(root + '.pdf')
    env.Command(target, source, build)
    return target

env.AddMethod(luamp)

# for docker

def dockerize(env, target, source, **kwargs):
    registry = kwargs['REGISTRY']
    def _dockerize(target, source, env):
        assert len(source) == 1
        source = source[0]
        assert source.isdir()

        assert len(target) == 1
        target = target[0]
        assert target.isfile() or not target.exists()

        out = sp.check_output(['sudo', 'docker', 'build', '.'], cwd=source.abspath)
        print out
        match = re.search('Successfully built (\w+)', out)
        assert match
        image = match.group(1)
        sp.check_call(['sudo', 'docker', 'tag', image, registry])
        sp.check_call(['sudo', 'docker', 'push', registry])

        with open(target.path, 'w') as fp:
            fp.write(image)

    env.Command(target, source, _dockerize)
    return target

env.AddMethod(dockerize)

# for erlang

env['ERLANG_HEADER'] = env.Dir('$BUILD_DIR/hrl')

def _erlc(target, source, env):
    assert len(source) == 1, source
    assert len(target) == 1, target
    src = source[0]
    tgt = target[0]
    assert op.split(src.abspath)[0] == op.split(tgt.abspath)[0], 'source: %s, target: %s' % (src.abspath, tgt.abspath)
    sp.check_call(['/usr/bin/erlc',
                   '-I', env['ERLANG_HEADER'].abspath,
                   '-smp',
                   src.abspath],
                  cwd=op.dirname(src.abspath))

env.Append(BUILDERS={'_erlc': Builder(action=_erlc, suffix='.beam')})

def erlc(env, source):
    beams = [env._erlc(x) for x in env.Flatten(source)]
    return beams

env.AddMethod(erlc)

def _dialyzer(target, source, env):
    assert len(source) == 1
    assert len(target) == 1
    src = source[0]
    tgt = target[0]
    with open(tgt.abspath, 'w') as fp:
        sp.check_call(['/usr/bin/dialyzer',
                       '-I', env['ERLANG_HEADER'].abspath,
                       '-DDIALYZER',
                       src.abspath],
                      stderr=sp.STDOUT,
                      stdout=fp)

env.Append(BUILDERS={'_dialyzer': Builder(action=_dialyzer, suffix='.dialyzer')})

def dialyzer(env, source):
    dials = [env._dialyzer(x) for x in env.Flatten(source)]
    env.Alias('DIALYZER', dials)
    return dials

env.AddMethod(dialyzer)

# for packaging

env['PKG_DIR'] = env.Dir('$BUILD_DIR/pkg/')

def _tarball(target, source, env):
    import tarfile
    target = target[0]
    xs = env['__ext']
    with tarfile.open(env.File(target).abspath, 'w:gz') as fp:
        for x, y in xs:
            fp.add(y, x)

env.Append(BUILDERS={'_tarball': Builder(action=_tarball, suffix='.tar.gz')})

def tarball(env, target, source):
    xs = []
    for p, f in source:
        fs = env.Flatten(f)
        for f in fs:
            f = env.File(f).abspath
            path_in_ball = op.join(p, op.basename(f))
            path_in_real = f
            while op.islink(path_in_real):
                path_in_real = op.join(
                    op.dirname(path_in_real), os.readlink(path_in_real))
            xs.append((path_in_ball, path_in_real))
    ball = env._tarball(target=[target],
                        source=[env.File(x) for _,x in xs],
                        __ext = xs)
    res = env.Install('$PKG_DIR', ball)
    env.Alias('PACK', res)
    return res

env.AddMethod(tarball)

# gogogo

env.SConscript('$BUILD_DIR/SConscript', exports='env')