如何获得 java_proto_library 的 1.7 兼容输出？

Question

对于 java_library，我可以在构建规则上设置 javacopts 属性。 java_proto_library 或 java_lite_proto_library.

似乎没有任何相似之处

我可以通过将 -source 和 -target 选项设置为 javac 通过 bazel 的 -javacopt 标志来解决这个问题，但是我'我宁愿将它编码在 BUILD 文件中。

Answer 1

您可以添加 JDK7 工具链，然后使用它构建所有内容。例如，将 this 添加到 BUILD 文件：

java_toolchain(
    name = "jdk7",
    bootclasspath = ["@bazel_tools//tools/jdk:bootclasspath"],
    encoding = "UTF-8",
    extclasspath = ["@bazel_tools//tools/jdk:extdir"],
    genclass = ["@bazel_tools//tools/jdk:GenClass_deploy.jar"],
    header_compiler = ["@bazel_tools//tools/jdk:turbine_deploy.jar"],
    ijar = ["@bazel_tools//tools/jdk:ijar"],
    javabuilder = ["@bazel_tools//tools/jdk:JavaBuilder_deploy.jar"],
    javac = ["@bazel_tools//third_party/java/jdk/langtools:javac_jar"],
    javac_supports_workers = 1,
    jvm_opts = [
        "-XX:+TieredCompilation",
        "-XX:TieredStopAtLevel=1",
    ],
    singlejar = ["@bazel_tools//tools/jdk:SingleJar_deploy.jar"],
    source_version = "7",
    target_version = "7",
    visibility = ["//visibility:public"],
)

然后构建：

bazel build --java_toolchain=//whatever:jdk7 //your:target

如何获得 java_proto_library 的 1.7 兼容输出？

How can you get 1.7-compatible output for a java_proto_library?

java

android

protocol-buffers

bazel