build a c project

build.py

#! /usr/bin/env python
import os
import subprocess
import cStringIO


TYPEC = 1 << 1
TYPECXX = 1 <<2

project = {
        "src": ["signal.c"],
        "includes": [],
        "libraries": [],
        "cflags": ["-gdwarf-4"],
        "target": "signal",
        "type": TYPEC
        }

commands = []

TOOLS = {
        "compiler": "gcc",
        "linker": "ld"
        }

def no_key_error(dict, keys):
    for key in keys:
        if key not in dict: 
           print "KeyError, %s" % key
           exit(1)

def add_executable(project): 
    required = ["src", "target", "type"]
    no_key_error(project, required)
    if project["type"] == TYPEC:
        TOOLS["compiler"] = "gcc"
    elif project["type"] == TYPECXX:
        TOOLS["compiler"] = "g++"
    else:
        print "unable to find compiler"
    cmd = cStringIO.StringIO()
    cmd.write(TOOLS["compiler"]+" ") 
    if "cflags" in project:
        for f in project["cflags"]:
            cmd.write(f + " ")
    if "includes" in project:
        for i in project["includes"]:
            cmd.write("-I %s " % i)  
    for s in project["src"]:
        cmd.write(s + " ") 
    cmd.write("-o %s " % project["target"]) 
    commands.append((project["target"], cmd.getvalue()))
    cmd.close()

def build_project(project):
    add_executable(project)
    for cmd in commands:    
        print "building %s" % cmd[0]
        subprocess.call(cmd[1], shell=True) 

if __name__ == "__main__":
    build_project(project)