Edit File: ninja_syntax.py
# This file comes from # https://github.com/martine/ninja/blob/master/misc/ninja_syntax.py # Do not edit! Edit the upstream one instead. """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 def escape_path(word): return word.replace("$ ", "$$ ").replace(" ", "$ ").replace(":", "$:") class Writer: 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): if value is None: return if isinstance(value, list): value = " ".join(filter(None, value)) # Filter out empty strings. self._line(f"{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 ): outputs = self._as_list(outputs) all_inputs = self._as_list(inputs)[:] out_outputs = list(map(escape_path, outputs)) all_inputs = list(map(escape_path, all_inputs)) if implicit: implicit = map(escape_path, self._as_list(implicit)) all_inputs.append("|") all_inputs.extend(implicit) if order_only: order_only = map(escape_path, self._as_list(order_only)) all_inputs.append("||") all_inputs.extend(order_only) self._line( "build {}: {}".format(" ".join(out_outputs), " ".join([rule] + all_inputs)) ) 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(self._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: # The text is too wide; wrap if possible. # Find the rightmost space that would obey our width constraint and # that's not an escaped space. 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: # No such space; just use the first unescaped space we can find. 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: # Give up on breaking. break self.output.write(leading_space + text[0:space] + " $\n") text = text[space + 1 :] # Subsequent lines are continuations, so indent them. leading_space = " " * (indent + 2) self.output.write(leading_space + text + "\n") def _as_list(self, 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" # We only have one special metacharacter: '$'. return string.replace("$", "$$")
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