ninja generator example

gistfile1.txt

#!/usr/bin/env python

import ninja_syntax
import glob
import os

cxx_files = [
    "src/OptionParser.cpp"
  , "src/easywsclient.cpp"
  , "src/json_to_eson.cc"
  , "src/main.cc"
  , "src/tiny_obj_loader.cc"
  , "src/render.cc"
  ]

c_files = [
    "src/parson.c"
  ]

include_path = [
    "-I./src"
  ]

def add_gcc_rule(ninja):
    ninja.rule('gnucxx', description='CXX $out',
        command='$gnucxx -MMD -MF $out.d $gnudefines $gnuincludes $gnucxxflags -c $in -o $out',
        depfile='$out.d', deps='gcc')
    ninja.rule('gnucc', description='CC $out',
        command='$gnucc -MMD -MF $out.d $gnudefines $gnuincludes $gnucflags -c $in -o $out',
        depfile='$out.d', deps='gcc')
    ninja.rule('gnulink', description='LINK $out', pool='link_pool',
        command='$gnuld $gnuldflags -o $out $in $libs')
    ninja.rule('gnustamp', description='STAMP $out', command='touch $out')
    ninja.newline()


def gen(ninja, target):
    ninja.variable('gnucxx', 'g++')
    ninja.variable('gnucc', 'gcc')
    ninja.variable('gnuld', '$gnucxx')
    ninja.variable('gnudefines', [])
    ninja.variable('gnuincludes', include_path)
    ninja.variable('gnucflags', ['-Wall', '-fno-rtti', '-fno-exceptions'])
    ninja.variable('gnucxxflags', ['-Wall', '-fno-rtti', '-fno-exceptions'])
    ninja.variable('gnuldflags', [])
    ninja.newline()

    ninja.pool('link_pool', depth=4)
    ninja.newline()

    add_gcc_rule(ninja)

    obj_files = []
    
    for src in cxx_files:
        obj = os.path.splitext(src)[0] + '.o'
        obj_files.append(obj)
        ninja.build(obj, 'gnucxx', src)
    ninja.newline()

    for src in c_files:
        obj = os.path.splitext(src)[0] + '.o'
        obj_files.append(obj)
        ninja.build(obj, 'gnucc', src)
    ninja.newline()

    ninja.build(target, 'gnulink', obj_files)
    ninja.build('all', 'phony', [target])
        
    ninja.default('all')

def main():
    f = open('build.ninja', 'w')
    ninja = ninja_syntax.Writer(f)
    gen(ninja, 'tania')
    f.close()

main()