vgstation13/tools/gen_globals.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
MIT License
Copyright (c) 2016 Pieter-Jan Briers
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 argparse
import os
import sys
import re
from distutils import spawn
try:
    import subprocess32 as subprocess
except ImportError:
    import subprocess


def main():
    parser = argparse.ArgumentParser()
    parser.add_argument("projectfile", help="The DME or code file to build from.")
    parser.add_argument("outfile", type=argparse.FileType("w", encoding="UTF-8"), help="The DM file to dump the output to.")  # yes, DM is Windows-1252. Don't care.
    parser.add_argument("-d", "--dump", type=argparse.FileType("w", encoding="UTF-8"), help="An optional file to dump the raw DM output to.")
    namespace = parser.parse_args()

    if not os.access(namespace.projectfile, os.F_OK):
        print("Unable to access file, aborting.")
        return

    tree = ""
    if namespace.projectfile[-4:] == ".txt":
        with open(namespace.projectfile, "r") as f:
            tree = f.read()

    else:
        tree = CompileFile(namespace.projectfile)
        if namespace.dump:
            namespace.dump.write(tree)

    variables = ParseTree(tree)
    print(variables)
    # Can't be bothered to fix the parser 100% so if something hates you just add it to this set to exclude it.
    ignores = {}
    variables = [x for x in variables if re.match("^[a-z_$][a-z_$0-9]*$", x, re.IGNORECASE) is not None and x not in ignores]
    print(variables)

    code = GenCode(variables)
    namespace.outfile.write(code)


def CompileFile(filename):
    compiler_path = FindCompiler()

    return subprocess.check_output([compiler_path, "-code_tree", filename]).decode("Windows-1252", errors="replace")


def FindCompiler():
    compiler_path = None

    if compiler_path:
        return compiler_path

    compiler_name = 'DreamMaker'

    if sys.platform == 'win32':
        compiler_name = 'dm'
    compiler_path = spawn.find_executable(compiler_name)
    if compiler_path is None and sys.platform == 'win32':
        # Attempt to look in %ProgramFiles% and %ProgramFiles(x86)% for BYOND.
        for path in (os.environ['ProgramFiles'], os.environ['ProgramFiles(x86)']):
            path = os.path.join(path, "BYOND", "bin", "dm.exe")

            if os.access(path, os.F_OK):
                compiler_path = path
                break

    if compiler_path is None:
        raise IOError("Unable to locate Dream Maker compiler binary. Please ensure that it is in your PATH.")

    return compiler_path


def GenCode(variables):
    out = "// THIS FILE IS AUTOMATICALLY CREATED BY tools/gen_globals.py\n/proc/readglobal(which)\n\tswitch(which)\n\t\t"

    for variable in variables:
        out += 'if("{0}")\n\t\t\treturn global.{0};\n\t\t'.format(variable)

    out += "\n/proc/writeglobal(which, newval)\n\tswitch(which)\n\t\t"

    for variable in variables:
        out += 'if("{0}")\n\t\t\tglobal.{0}=newval\n\t\t'.format(variable)

    out += "\n/var/list/_all_globals=list("
    for i, variable in enumerate(variables):
        out += '"{0}"'.format(variable)
        if i != len(variables) - 1:
            out += ","

    out += ")"

    return out


def ParseTree(tree):
    variables = []
    lines = tree.split("\n")

    # Keep track of the current nodes we're in. Depth is the length of this.
    stack = []
    for index, line in enumerate(lines):
        # Root level
        node = line.split(" ", 1)[0].strip()

        indent = line.count("\t")

        # We're skipping some levels.
        if indent > len(stack):
            continue

        print(node, index)

        # We dropped some levels, write the current var.
        if indent < len(stack):
            varname = stack.pop()
            if varname != "var":
                variables.append(varname)

                # Reset stack to where it needs to be.
                dropped_levels = len(stack) - indent
                for x in range(dropped_levels):
                    stack.pop()

        # Hack to speed everything up by only doing vars.
        if len(stack) == 0:
            node = line.split(" ", 1)[0]
            if node == "var":
                stack.append(node)

            continue

        if len(stack) == 1 and node == "const":
            continue

        if node != "":
            stack.append(node)

    return variables

if __name__ == "__main__":
    main()