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impl.bzl
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impl.bzl
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# Copyright 2018 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
load(
"//kotlin/internal/jvm:compile.bzl",
_kt_jvm_produce_jar_actions = "kt_jvm_produce_jar_actions",
)
load(
"//kotlin/internal:defs.bzl",
_KtJvmInfo = "KtJvmInfo",
)
load(
"//kotlin/internal/utils:utils.bzl",
_utils = "utils",
)
def _make_providers(ctx, providers, transitive_files = depset(order = "default")):
return struct(
kt = providers.kt,
providers = [
providers.java,
providers.kt,
DefaultInfo(
files = depset([ctx.outputs.jar]),
runfiles = ctx.runfiles(
transitive_files = transitive_files,
collect_default = True,
),
),
],
)
def _write_launcher_action(ctx, rjars, main_class, jvm_flags, args = "", wrapper_preamble = ""):
"""Macro that writes out a launcher script shell script.
Args:
rjars: All of the runtime jars required to launch this java target.
main_class: the main class to launch.
jvm_flags: The flags that should be passed to the jvm.
args: Args that should be passed to the Binary.
"""
classpath = ":".join(["${RUNPATH}%s" % (j.short_path) for j in rjars.to_list()])
jvm_flags = " ".join([ctx.expand_location(f, ctx.attr.data) for f in jvm_flags])
template = ctx.attr._java_stub_template.files.to_list()[0]
javabin = "JAVABIN=" + str(ctx.attr._java_runtime[java_common.JavaRuntimeInfo].java_executable_exec_path)
ctx.actions.expand_template(
template = template,
output = ctx.outputs.executable,
substitutions = {
"%classpath%": classpath,
"%java_start_class%": main_class,
"%javabin%": javabin,
"%jvm_flags%": jvm_flags,
"%set_jacoco_metadata%": "",
"%set_jacoco_main_class%": "",
"%set_jacoco_java_runfiles_root%": "",
"%set_java_coverage_new_implementation%": "",
"%workspace_prefix%": ctx.workspace_name + "/",
},
is_executable = True,
)
def _unify_jars(ctx):
if bool(ctx.attr.jar):
return struct(class_jar = ctx.file.jar, source_jar = ctx.file.srcjar, ijar = None)
else:
# Legacy handling.
jars = []
if (ctx.file.srcjar and not "%s" % ctx.file.srcjar.path == "third_party/empty.jar"):
source_jars = [ctx.file.srcjar]
else:
source_jars = []
# TODO after a while remove the for block, the checks after it,and simplify the source-jar to jar allignment.
# There must be a single jar jar and it can either be a filegroup or a JavaInfo.
for jar in ctx.attr.jars:
# If a JavaInfo is available it's because it was picked up from a `maven_jar` style attribute -- e.g.,
# @com_google_guava_guava//jar. so the transitive_compile_jars or the transitive_runtime_jars should not be
# visited -- descending into these results in ijars entering the graph.
if JavaInfo in jar:
jars += jar[JavaInfo].full_compile_jars.to_list()
source_jars += jar[JavaInfo].transitive_source_jars.to_list()
else:
# this branch occurs when the attr was a filegroup.
for file in jar.files.to_list():
if file.basename.endswith("-sources.jar"):
source_jars.append(file)
elif file.basename.endswith(".jar"):
jars.append(file)
else:
fail("a jar pointing to a filegroup must either end with -sources.jar or .jar")
if len(jars) > 1:
fail("got more than one jar, this is an error create an issue: %s" % jars)
if len(source_jars) > 1:
fail("got more than one source jar. " +
"Did you include both srcjar and a sources jar in the jars attribute?: %s" % source_jars)
return struct(class_jar = jars[0], source_jar = source_jars[0] if len(source_jars) == 1 else None, ijar = None)
def kt_jvm_import_impl(ctx):
if bool(ctx.attr.jars) and bool(ctx.attr.jar):
fail("Cannot use both jars= and jar= attribute. Prefer jar=")
artifact = _unify_jars(ctx)
kt_info = _KtJvmInfo(
module_name = _utils.derive_module_name(ctx),
outputs = struct(
jars = [artifact],
),
)
return struct(
kt = kt_info,
providers = [
DefaultInfo(files = depset(direct = [artifact.class_jar])),
JavaInfo(
output_jar = artifact.class_jar,
compile_jar = artifact.class_jar,
source_jar = artifact.source_jar,
runtime_deps = [dep[JavaInfo] for dep in ctx.attr.runtime_deps if JavaInfo in dep],
exports = [d[JavaInfo] for d in getattr(ctx.attr, "exports", [])],
neverlink = getattr(ctx.attr, "neverlink", False),
),
kt_info,
],
)
def kt_jvm_library_impl(ctx):
return _make_providers(
ctx,
_kt_jvm_produce_jar_actions(ctx, "kt_jvm_library"),
)
def kt_jvm_binary_impl(ctx):
providers = _kt_jvm_produce_jar_actions(ctx, "kt_jvm_binary")
_write_launcher_action(
ctx,
providers.java.transitive_runtime_jars,
ctx.attr.main_class,
ctx.attr.jvm_flags,
)
return _make_providers(
ctx,
providers,
depset(
order = "default",
transitive = [providers.java.transitive_runtime_jars],
direct = ctx.files._java_runtime,
),
)
_SPLIT_STRINGS = [
"src/test/java/",
"src/test/kotlin/",
"javatests/",
"kotlin/",
"java/",
"test/",
]
def kt_jvm_junit_test_impl(ctx):
providers = _kt_jvm_produce_jar_actions(ctx, "kt_jvm_test")
runtime_jars = depset(ctx.files._bazel_test_runner, transitive = [providers.java.transitive_runtime_jars])
test_class = ctx.attr.test_class
# If no test_class, do a best-effort attempt to infer one.
if not bool(ctx.attr.test_class):
for file in ctx.files.srcs:
if file.basename.split(".")[0] == ctx.attr.name:
for splitter in _SPLIT_STRINGS:
elements = file.short_path.split(splitter, 1)
if len(elements) == 2:
test_class = elements[1].split(".")[0].replace("/", ".")
_write_launcher_action(
ctx,
runtime_jars,
main_class = ctx.attr.main_class,
jvm_flags = ["-ea", "-Dbazel.test_suite=%s" % test_class] + ctx.attr.jvm_flags,
)
return _make_providers(
ctx,
providers,
depset(
order = "default",
transitive = [runtime_jars],
direct = ctx.files._java_runtime,
),
)