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-rw-r--r-- | misc/ninja.py | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/misc/ninja.py b/misc/ninja.py new file mode 100644 index 0000000..f13adfd --- /dev/null +++ b/misc/ninja.py @@ -0,0 +1,68 @@ +#!/usr/bin/python + +"""Python module for generating .ninja files. + +Note that this is emphatically not a required piece of Ninja; it's +just a helpful utility for build-file-generation systems that already +use Python. +""" + +import textwrap + +class Writer(object): + def __init__(self, output, width=78): + self.output = output + self.width = width + + def newline(self): + self.output.write('\n') + + def comment(self, text): + for line in textwrap.wrap(text, self.width - 2): + self.output.write('# ' + line + '\n') + + def variable(self, key, value, indent=0): + self._line('%s%s = %s' % (' ' * indent, key, value), indent) + + def rule(self, name, command, description=None, depfile=None): + self._line('rule %s' % name) + self.variable('command', command, indent=1) + if description: + self.variable('description', description, indent=1) + if depfile: + self.variable('depfile', depfile, indent=1) + + def build(self, outputs, rule, inputs=None, implicit=None, order_only=None, + variables=None): + outputs = self._as_list(outputs) + all_inputs = self._as_list(inputs)[:] + + if implicit: + all_inputs.append('|') + all_inputs.extend(self._as_list(implicit)) + if order_only: + all_inputs.append('||') + all_inputs.extend(self._as_list(order_only)) + + self._line('build %s: %s %s' % (' '.join(outputs), + rule, + ' '.join(all_inputs))) + + if variables: + for key, val in variables: + self.variable(key, val, indent=1) + + def _line(self, text, indent=0): + while len(text) > self.width: + space = text.rfind(' ', 0, self.width - 4) + assert space != -1 # TODO: handle if no space found. + self.output.write(text[0:space] + ' \\\n') + text = ' ' * (indent+2) + text[space:].lstrip() + self.output.write(text + '\n') + + def _as_list(self, input): + if input is None: + return [] + if isinstance(input, list): + return input + return [input] |