|
|
@@ -0,0 +1,183 @@
|
|
|
+
|
|
|
+
|
|
|
+"""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 re
|
|
|
+import textwrap
|
|
|
+
|
|
|
+def escape_path(word):
|
|
|
+ return word.replace('$ ', '$$ ').replace(' ', '$ ').replace(':', '$:')
|
|
|
+
|
|
|
+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, break_long_words=False,
|
|
|
+ break_on_hyphens=False):
|
|
|
+ self.output.write('# ' + line + '\n')
|
|
|
+
|
|
|
+ def variable(self, key, value, indent=0):
|
|
|
+ if value is None:
|
|
|
+ return
|
|
|
+ if isinstance(value, list):
|
|
|
+ value = ' '.join(filter(None, value))
|
|
|
+ self._line('%s = %s' % (key, value), indent)
|
|
|
+
|
|
|
+ def pool(self, name, depth):
|
|
|
+ self._line('pool %s' % name)
|
|
|
+ self.variable('depth', depth, indent=1)
|
|
|
+
|
|
|
+ def rule(self, name, command, description=None, depfile=None,
|
|
|
+ generator=False, pool=None, restat=False, rspfile=None,
|
|
|
+ rspfile_content=None, deps=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)
|
|
|
+ if generator:
|
|
|
+ self.variable('generator', '1', indent=1)
|
|
|
+ if pool:
|
|
|
+ self.variable('pool', pool, indent=1)
|
|
|
+ if restat:
|
|
|
+ self.variable('restat', '1', indent=1)
|
|
|
+ if rspfile:
|
|
|
+ self.variable('rspfile', rspfile, indent=1)
|
|
|
+ if rspfile_content:
|
|
|
+ self.variable('rspfile_content', rspfile_content, indent=1)
|
|
|
+ if deps:
|
|
|
+ self.variable('deps', deps, indent=1)
|
|
|
+
|
|
|
+ def build(self, outputs, rule, inputs=None, implicit=None, order_only=None,
|
|
|
+ variables=None, implicit_outputs=None, pool=None):
|
|
|
+ outputs = as_list(outputs)
|
|
|
+ out_outputs = [escape_path(x) for x in outputs]
|
|
|
+ all_inputs = [escape_path(x) for x in as_list(inputs)]
|
|
|
+
|
|
|
+ if implicit:
|
|
|
+ implicit = [escape_path(x) for x in as_list(implicit)]
|
|
|
+ all_inputs.append('|')
|
|
|
+ all_inputs.extend(implicit)
|
|
|
+ if order_only:
|
|
|
+ order_only = [escape_path(x) for x in as_list(order_only)]
|
|
|
+ all_inputs.append('||')
|
|
|
+ all_inputs.extend(order_only)
|
|
|
+ if implicit_outputs:
|
|
|
+ implicit_outputs = [escape_path(x)
|
|
|
+ for x in as_list(implicit_outputs)]
|
|
|
+ out_outputs.append('|')
|
|
|
+ out_outputs.extend(implicit_outputs)
|
|
|
+
|
|
|
+ self._line('build %s: %s' % (' '.join(out_outputs),
|
|
|
+ ' '.join([rule] + all_inputs)))
|
|
|
+ if pool is not None:
|
|
|
+ self._line(' pool = %s' % pool)
|
|
|
+
|
|
|
+ if variables:
|
|
|
+ if isinstance(variables, dict):
|
|
|
+ iterator = iter(variables.items())
|
|
|
+ else:
|
|
|
+ iterator = iter(variables)
|
|
|
+
|
|
|
+ for key, val in iterator:
|
|
|
+ self.variable(key, val, indent=1)
|
|
|
+
|
|
|
+ return outputs
|
|
|
+
|
|
|
+ def include(self, path):
|
|
|
+ self._line('include %s' % path)
|
|
|
+
|
|
|
+ def subninja(self, path):
|
|
|
+ self._line('subninja %s' % path)
|
|
|
+
|
|
|
+ def default(self, paths):
|
|
|
+ self._line('default %s' % ' '.join(as_list(paths)))
|
|
|
+
|
|
|
+ def _count_dollars_before_index(self, s, i):
|
|
|
+ """Returns the number of '$' characters right in front of s[i]."""
|
|
|
+ dollar_count = 0
|
|
|
+ dollar_index = i - 1
|
|
|
+ while dollar_index > 0 and s[dollar_index] == '$':
|
|
|
+ dollar_count += 1
|
|
|
+ dollar_index -= 1
|
|
|
+ return dollar_count
|
|
|
+
|
|
|
+ def _line(self, text, indent=0):
|
|
|
+ """Write 'text' word-wrapped at self.width characters."""
|
|
|
+ leading_space = ' ' * indent
|
|
|
+ while len(leading_space) + len(text) > self.width:
|
|
|
+
|
|
|
+
|
|
|
+
|
|
|
+
|
|
|
+ available_space = self.width - len(leading_space) - len(' $')
|
|
|
+ space = available_space
|
|
|
+ while True:
|
|
|
+ space = text.rfind(' ', 0, space)
|
|
|
+ if (space < 0 or
|
|
|
+ self._count_dollars_before_index(text, space) % 2 == 0):
|
|
|
+ break
|
|
|
+
|
|
|
+ if space < 0:
|
|
|
+
|
|
|
+ space = available_space - 1
|
|
|
+ while True:
|
|
|
+ space = text.find(' ', space + 1)
|
|
|
+ if (space < 0 or
|
|
|
+ self._count_dollars_before_index(text, space) % 2 == 0):
|
|
|
+ break
|
|
|
+ if space < 0:
|
|
|
+
|
|
|
+ break
|
|
|
+
|
|
|
+ self.output.write(leading_space + text[0:space] + ' $\n')
|
|
|
+ text = text[space+1:]
|
|
|
+
|
|
|
+
|
|
|
+ leading_space = ' ' * (indent+2)
|
|
|
+
|
|
|
+ self.output.write(leading_space + text + '\n')
|
|
|
+
|
|
|
+ def close(self):
|
|
|
+ self.output.close()
|
|
|
+
|
|
|
+
|
|
|
+def as_list(input):
|
|
|
+ if input is None:
|
|
|
+ return []
|
|
|
+ if isinstance(input, list):
|
|
|
+ return input
|
|
|
+ return [input]
|
|
|
+
|
|
|
+
|
|
|
+def escape(string):
|
|
|
+ """Escape a string such that it can be embedded into a Ninja file without
|
|
|
+ further interpretation."""
|
|
|
+ assert '\n' not in string, 'Ninja syntax does not allow newlines'
|
|
|
+
|
|
|
+ return string.replace('$', '$$')
|
|
|
+
|
|
|
+
|
|
|
+def expand(string, vars, local_vars={}):
|
|
|
+ """Expand a string containing $vars as Ninja would.
|
|
|
+
|
|
|
+ Note: doesn't handle the full Ninja variable syntax, but it's enough
|
|
|
+ to make configure.py's use of it work.
|
|
|
+ """
|
|
|
+ def exp(m):
|
|
|
+ var = m.group(1)
|
|
|
+ if var == '$':
|
|
|
+ return '$'
|
|
|
+ return local_vars.get(var, vars.get(var, ''))
|
|
|
+ return re.sub(r'\$(\$|\w*)', exp, string)
|
