| Peter Collingbourne | d5395fb | 2012-01-08 22:09:58 +0000 | [diff] [blame] | 1 | import ninja_syntax |
| 2 | import os |
| 3 | |
| 4 | # Simple meta-build system. |
| 5 | |
| 6 | class Make(object): |
| 7 | def __init__(self): |
| 8 | self.output = open(self.output_filename(), 'w') |
| 9 | self.rules = {} |
| 10 | self.rule_text = '' |
| 11 | self.all_targets = [] |
| 12 | self.clean_files = [] |
| 13 | self.distclean_files = [] |
| 14 | self.output.write("""all:: |
| 15 | |
| 16 | ifndef VERBOSE |
| 17 | Verb = @ |
| 18 | endif |
| 19 | |
| 20 | """) |
| 21 | |
| 22 | def output_filename(self): |
| 23 | return 'Makefile' |
| 24 | |
| 25 | def rule(self, name, command, description=None, depfile=None, |
| 26 | generator=False): |
| 27 | self.rules[name] = {'command': command, 'description': description, |
| 28 | 'depfile': depfile, 'generator': generator} |
| 29 | |
| 30 | def build(self, output, rule, inputs=[], implicit=[], order_only=[]): |
| 31 | inputs = self._as_list(inputs) |
| 32 | implicit = self._as_list(implicit) |
| 33 | order_only = self._as_list(order_only) |
| 34 | |
| 35 | output_dir = os.path.dirname(output) |
| 36 | if output_dir != '' and not os.path.isdir(output_dir): |
| 37 | os.makedirs(output_dir) |
| 38 | |
| 39 | dollar_in = ' '.join(inputs) |
| 40 | subst = lambda text: text.replace('$in', dollar_in).replace('$out', output) |
| 41 | |
| 42 | deps = ' '.join(inputs + implicit) |
| 43 | if order_only: |
| 44 | deps += ' | ' |
| 45 | deps += ' '.join(order_only) |
| 46 | self.output.write('%s: %s\n' % (output, deps)) |
| 47 | |
| 48 | r = self.rules[rule] |
| 49 | command = subst(r['command']) |
| 50 | if r['description']: |
| 51 | desc = subst(r['description']) |
| 52 | self.output.write('\t@echo %s\n\t$(Verb) %s\n' % (desc, command)) |
| 53 | else: |
| 54 | self.output.write('\t%s\n' % command) |
| 55 | if r['depfile']: |
| 56 | depfile = subst(r['depfile']) |
| 57 | self.output.write('-include '+depfile+'\n') |
| 58 | self.output.write('\n') |
| 59 | |
| 60 | self.all_targets.append(output) |
| 61 | if r['generator']: |
| 62 | self.distclean_files.append(output) |
| 63 | else: |
| 64 | self.clean_files.append(output) |
| 65 | |
| 66 | def _as_list(self, input): |
| 67 | if isinstance(input, list): |
| 68 | return input |
| 69 | return [input] |
| 70 | |
| 71 | def finish(self): |
| 72 | self.output.write('all:: %s\n\n' % ' '.join(self.all_targets)) |
| 73 | self.output.write('clean: \n\trm -f %s\n\n' % ' '.join(self.clean_files)) |
| 74 | self.output.write('distclean: clean\n\trm -f %s\n' % ' '.join(self.distclean_files)) |
| 75 | |
| 76 | class Ninja(ninja_syntax.Writer): |
| 77 | def __init__(self): |
| 78 | ninja_syntax.Writer.__init__(self, open(self.output_filename(), 'w')) |
| 79 | |
| 80 | def output_filename(self): |
| 81 | return 'build.ninja' |
| 82 | |
| 83 | def finish(self): |
| 84 | pass |
| 85 | |
| 86 | def from_name(name): |
| 87 | if name == 'make': |
| 88 | return Make() |
| 89 | if name == 'ninja': |
| 90 | return Ninja() |
| 91 | raise LookupError, 'unknown generator: %s; supported generators are make and ninja' % name |