MakeFileConverter.py

import sys
import json
import functions

def convert(makefile_name="Makefile"):
    """
    Converts the Makefile into a JSONMakeFile
    """

    makefile=functions.openIgnoreCase(makefile_name)
    conversion_dict = {'Variables': {}, 'Rules': {}}

    rule = ''

    for line in makefile:

        if line == '' or line.isspace():
            continue

        if '$' in line:
            #Strip parentheses for all words in the line that has a dollar sign
            newLine = ""
            for word in line.split():
                if '$' in word:
                    newLine += __parenStrip(word) + " "
                else:
                    newLine += word + " "
            if line[0].isspace():
                line = line[0] + newLine
            else:
                line = newLine

        if '=' in line:
            #Everything following the '=' should be stored in a variable
            var_split = line.split('=')
            if len(var_split) > 2:
                variable = "=".join(var_split[1:]).strip()
            else:
                variable = var_split[1].strip()
            conversion_dict['Variables'][var_split[0].strip()] = __parenStrip(variable)

        if ':' in line:
            #This means that a rule is being declared
            rule_split = line.split(':')
            rule = rule_split[0].strip()

            try:
                conversion_dict['Rules'][rule]['depends'].extend([word for word in rule_split[1].split()])
            except KeyError:
                conversion_dict['Rules'][rule] = {'depends': [], 'commands': []}
                conversion_dict['Rules'][rule]['depends'].extend([word for word in rule_split[1].split()])

        if line[0].isspace():
            #These are commands for some rule
            #Everything after the initial whitespace is a command
            conversion_dict['Rules'][rule]['commands'].append(' '.join(line.split()))

    __writeFile(conversion_dict)

def __writeFile(conversion_dict):
    """
    Writes the makefile to file

    Accepts a dictionary as input, and converts to a json object, then writes to the file
    """

    with open('JSONMakefile', 'w') as file:
        #write the actual file
        file.write(json.dumps(conversion_dict, sort_keys=True, indent=4, separators=(',', ': ')))

def __parenStrip(string):
    """
    Strips the parentheses enclosing a variable
    I'll deal with other cases later, but for now it is up to the user to match parentheses correctly
    """
    if not ('(' in string and ')' in string):
        return string

    if string[1] == '(' and string[-1] == ')':
        return string[0] + string[2:-1]
    return string