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import ninja_syntax
import os
# Simple meta-build system.
class Make(object):
def __init__(self):
self.output = open(self.output_filename(), 'w')
self.rules = {}
self.rule_text = ''
self.all_targets = []
self.default_targets = []
self.clean_files = []
self.distclean_files = []
self.output.write("""all::
ifndef VERBOSE
Verb = @
endif
""")
def output_filename(self):
return 'Makefile'
def rule(self, name, command, description=None, depfile=None,
generator=False):
self.rules[name] = {'command': command, 'description': description,
'depfile': depfile, 'generator': generator}
def build(self, output, rule, inputs=[], implicit=[], order_only=[]):
inputs = self._as_list(inputs)
implicit = self._as_list(implicit)
order_only = self._as_list(order_only)
output_dir = os.path.dirname(output)
if output_dir != '' and not os.path.isdir(output_dir):
os.makedirs(output_dir)
dollar_in = ' '.join(inputs)
subst = lambda text: text.replace('$in', dollar_in).replace('$out', output)
deps = ' '.join(inputs + implicit)
if order_only:
deps += ' | '
deps += ' '.join(order_only)
self.output.write('%s: %s\n' % (output, deps))
r = self.rules[rule]
command = subst(r['command'])
if r['description']:
desc = subst(r['description'])
self.output.write('\t@echo %s\n\t$(Verb) %s\n' % (desc, command))
else:
self.output.write('\t%s\n' % command)
if r['depfile']:
depfile = subst(r['depfile'])
self.output.write('-include '+depfile+'\n')
self.output.write('\n')
self.all_targets.append(output)
if r['generator']:
self.distclean_files.append(output)
else:
self.clean_files.append(output)
def _as_list(self, input):
if isinstance(input, list):
return input
return [input]
def default(self, paths):
self.default_targets += self._as_list(paths)
def finish(self):
self.output.write('all:: %s\n\n' % ' '.join(self.default_targets or self.all_targets))
self.output.write('clean: \n\trm -f %s\n\n' % ' '.join(self.clean_files))
self.output.write('distclean: clean\n\trm -f %s\n' % ' '.join(self.distclean_files))
class Ninja(ninja_syntax.Writer):
def __init__(self):
ninja_syntax.Writer.__init__(self, open(self.output_filename(), 'w'))
def output_filename(self):
return 'build.ninja'
def finish(self):
pass
def from_name(name):
if name == 'make':
return Make()
if name == 'ninja':
return Ninja()
raise LookupError, 'unknown generator: %s; supported generators are make and ninja' % name
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