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96 lines
3.3 KiB
Python
96 lines
3.3 KiB
Python
# -*- mode: python; -*-
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#
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# Copyright 2016 The Domain Registry Authors. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Rule for building JavaScript binaries with Closure Compiler.
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"""
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load("//third_party/closure/compiler/private:defs.bzl",
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"JS_LANGUAGE_DEFAULT",
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"JS_LIBRARY_ATTRS",
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"JS_PEDANTIC_ARGS",
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"JS_HIDE_WARNING_ARGS",
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"check_js_language",
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"collect_js_srcs",
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"determine_js_language",
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"is_using_closure_library")
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def _impl(ctx):
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srcs, externs = collect_js_srcs(ctx)
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check_js_language(ctx.attr.language_in)
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check_js_language(ctx.attr.language_out)
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dependent_language = determine_js_language(ctx)
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if ctx.attr.language_in != dependent_language:
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fail("language_in was %s but dependencies use %s" % (
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ctx.attr.language_in, dependent_language))
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args = [
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"--js_output_file=%s" % ctx.outputs.out.path,
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"--create_source_map=%s" % ctx.outputs.srcmap.path,
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"--language_in=%s" % ctx.attr.language_in,
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"--language_out=%s" % ctx.attr.language_out,
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"--compilation_level=" + ctx.attr.compilation_level,
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"--warning_level=VERBOSE",
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"--new_type_inf",
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"--generate_exports",
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]
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args += JS_HIDE_WARNING_ARGS
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if ctx.attr.formatting:
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args += ["--formatting=" + ctx.attr.formatting]
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if ctx.attr.debug:
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args += ["--debug"]
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else:
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if is_using_closure_library(srcs):
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args += ["--define=goog.DEBUG=false"]
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if ctx.attr.main:
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args += [
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"--dependency_mode=STRICT",
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"--entry_point=goog:%s" % ctx.attr.main,
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]
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else:
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args += ["--dependency_mode=LOOSE"]
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if ctx.attr.pedantic:
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args += JS_PEDANTIC_ARGS
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args += ["--use_types_for_optimization"]
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args += ctx.attr.defs
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args += ["--externs=%s" % extern.path for extern in externs]
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args += ["--js=%s" % src.path for src in srcs]
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ctx.action(
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inputs=list(srcs) + list(externs),
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outputs=[ctx.outputs.out, ctx.outputs.srcmap],
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executable=ctx.executable._compiler,
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arguments=args,
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mnemonic="JSCompile",
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progress_message="Compiling %d JavaScript files to %s" % (
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len(srcs) + len(externs),
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ctx.outputs.out.short_path))
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return struct(files=set([ctx.outputs.out]))
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closure_js_binary = rule(
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implementation=_impl,
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attrs=JS_LIBRARY_ATTRS + {
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"main": attr.string(),
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"compilation_level": attr.string(default="ADVANCED"),
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"defs": attr.string_list(),
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"pedantic": attr.bool(default=False),
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"debug": attr.bool(default=False),
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"formatting": attr.string(),
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"language_in": attr.string(default=JS_LANGUAGE_DEFAULT),
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"language_out": attr.string(default="ECMASCRIPT3"),
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"_compiler": attr.label(
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default=Label("//third_party/closure/compiler"),
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executable=True),
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},
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outputs={"out": "%{name}.js",
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"srcmap": "%{name}.sourcemap"})
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