配置bazel以使用特定的JVM版本进行构建/测试

Question

我正在评估Bazel，并试图对它进行配置，以便它使用不同的JDK来构建和测试我的scala项目。

以下是我的Bazel Info输出中的相关行：

java-home: /nix/store/09x4mnxfzppwq1yjaakrfa6aj3rp7sw8-openjdk-11.0.4-ga/lib/openjdk
java-runtime: OpenJDK Runtime Environment (build 11.0.3-internal+0-adhoc..jdk11u-jdk-11.0.3-ga) by Oracle Corporation
java-vm: OpenJDK 64-Bit Server VM (build 11.0.3-internal+0-adhoc..jdk11u-jdk-11.0.3-ga, mixed mode) by Oracle Corporation
max-heap-size: 8325MB
package_path: %workspace%
release: release 1.1.0- (@non-git)

虽然我的包管理器似乎使用了相当新版本的openjdk构建了Bazel，但我要构建/测试的项目应该使用我在/usr/lib/jvm/java-8-openjdk下安装的JDK。

通过深入研究github的各种问题，我最终得到了以下解决方案，它允许我获得一个绿色构建：

bazel test \
    --define=ABSOLUTE_JAVABASE=/usr/lib/jvm/java-8-openjdk \
    --host_javabase=@bazel_tools//tools/jdk:absolute_javabase \
    --host_java_toolchain=@bazel_tools//tools/jdk:toolchain_vanilla \
    --java_toolchain=@bazel_tools//tools/jdk:toolchain_vanilla \
    --test_timeout=10 --test_output=all //...

null

Answer 1

我如何在项目的基础上永久设置此选项，这样我就不必一直提供它们了？我可以这样做，使intellij Bazel插件将自动接收它吗？

是的。将此添加到 /.bazelrc 中，以便所有构建使用本地JDK：

build --define=ABSOLUTE_JAVABASE=/usr/lib/jvm/java-8-openjdk
build --host_javabase=@bazel_tools//tools/jdk:absolute_javabase
build --host_java_toolchain=@bazel_tools//tools/jdk:toolchain_vanilla
build --java_toolchain=@bazel_tools//tools/jdk:toolchain_vanilla

IntelliJ插件将自动获取这些信息。

build:local_jdk --define=ABSOLUTE_JAVABASE=/usr/lib/jvm/java-8-openjdk
build:local_jdk --host_javabase=@bazel_tools//tools/jdk:absolute_javabase
build:local_jdk --host_java_toolchain=@bazel_tools//tools/jdk:toolchain_vanilla
build:local_jdk --java_toolchain=@bazel_tools//tools/jdk:toolchain_vanilla

$ bazel query --output=build @bazel_tools//tools/jdk:absolute_javabase

java_runtime(
  name = "absolute_javabase",
  tags = ["__JAVA_RULES_MIGRATION_DO_NOT_USE_WILL_BREAK__"],
  generator_name = "absolute_javabase",
  generator_function = "java_runtime",
  generator_location = "tools/jdk/BUILD:75",
  java_home = "$(ABSOLUTE_JAVABASE)",
)

$ bazel query --output=build @bazel_tools//tools/jdk:toolchain_vanilla

java_toolchain(
  name = "toolchain_vanilla",
  tags = ["__JAVA_RULES_MIGRATION_DO_NOT_USE_WILL_BREAK__"],
  generator_name = "toolchain_vanilla",
  generator_function = "default_java_toolchain",
  generator_location = "tools/jdk/BUILD:367",
  source_version = "",
  target_version = "",
  bootclasspath = ["@bazel_tools//tools/jdk:platformclasspath"],
  misc = ["-XDskipDuplicateBridges=true", "-g", "-parameters"],
  jvm_opts = [],
  javac_supports_workers = True,
  javac = ["@bazel_tools//tools/jdk:javac_jar"],
  tools = ["@bazel_tools//tools/jdk:java_compiler_jar", "@bazel_tools//tools/jdk:jdk_compiler_jar"],
  javabuilder = ["@bazel_tools//tools/jdk:vanillajavabuilder"],
  singlejar = ["@bazel_tools//tools/jdk:singlejar"],
  genclass = ["@bazel_tools//tools/jdk:genclass"],
  ijar = ["@bazel_tools//tools/jdk:ijar"],
  header_compiler = ["@bazel_tools//tools/jdk:turbine"],
  header_compiler_direct = ["@bazel_tools//tools/jdk:turbine_direct"],
  forcibly_disable_header_compilation = True,
)