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1#!/usr/bin/env python
2#
3# Copyright (C) 2022 The Android Open Source Project
4#
5# Licensed under the Apache License, Version 2.0 (the "License");
6# you may not use this file except in compliance with the License.
7# You may obtain a copy of the License at
8#
9#      http://www.apache.org/licenses/LICENSE-2.0
10#
11# Unless required by applicable law or agreed to in writing, software
12# distributed under the License is distributed on an "AS IS" BASIS,
13# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14# See the License for the specific language governing permissions and
15# limitations under the License.
16
17import functools
18
19from ninja_syntax import Variable, BuildAction, Rule, Pool, Subninja, Line
20
21
22# TODO: Format the output according to a configurable width variable
23# This will ensure that the generated content fits on a screen and does not
24# require horizontal scrolling
25class Writer:
26    def __init__(self, file, builddir: str = None):
27        self.file = file
28        self.nodes = []  # type Node
29        if builddir:
30            self.add_variable(Variable('builddir', builddir))
31
32    def add_variable(self, variable: Variable):
33        self.nodes.append(variable)
34
35    @functools.lru_cache(maxsize=None)
36    def add_rule(self, rule: Rule):
37        self.nodes.append(rule)
38
39    @functools.lru_cache(maxsize=None)
40    def add_build_action(self, build_action: BuildAction):
41        self.nodes.append(build_action)
42
43    def add_pool(self, pool: Pool):
44        self.nodes.append(pool)
45
46    def add_comment(self, comment: str):
47        self.nodes.append(Line(value=f"# {comment}"))
48
49    def add_default(self, default: str):
50        self.nodes.append(Line(value=f"default {default}"))
51
52    def add_newline(self):
53        self.nodes.append(Line(value=""))
54
55    def add_subninja(self, subninja: Subninja):
56        self.nodes.append(subninja)
57
58    def add_phony(self, name: str, deps: tuple):
59        self.add_build_action(BuildAction(output=name, rule="phony", inputs=deps))
60
61    def write(self):
62        for node in self.nodes:
63            for line in node.stream():
64                print(line, file=self.file)
65