Bazel:如何导入/构建用于go_binary的go_test

Question

我正在用bazel在我的CI系统上运行一个go测试。go测试将需要使用从另一个go文件构建的助手二进制文件。

dir结构如下所示：

    some/of/my/path
    ├── BUILD.bazel
    ├── my_utils.go
    ├── my_test.go
    └── my_tool
        ├── BUILD.bazel
        └── my_tool.go

my_test.go my_tool**.**中的(即中的代码)将使用从dir 构建的可执行二进制文件。

在非bazel情况下，我只需要go build ./mytool就可以得到my_test.go需要的可执行二进制文件。为了适应这个bazel世界，我在bazel文件中写了以下内容：

• 在some/of/my/path/BUILD.bazel中

    load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
    
    go_library(
        name = "testutils",
        srcs = ["my_utils.go"],
        importpath = "some/of/my/path",
        visibility = ["//visibility:public"],
        deps = [
            "@org_golang_x_net//context",
            ... (some other dependencies, not related)
        ],
    )
    
    go_test(
        name = "my_test",
        size = "enormous",
        srcs = ["mytest.go"],
        embed = [":testutils"],
        deps = [
            "//some/of/my/path/my_tool:my_tool",
        ],
    )

• 在some/of/my/path/my_tool/BUILD.bazel中

    load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library")
    
    go_library(
        name = "my_tool_lib",
        srcs = ["my_tool.go"],
        importpath = "some/of/my/path/my_tool",
        visibility = ["//visibility:private"],
        deps = ["some dependency"],
    )
    
    go_binary(
        name = "my_tool",
        embed = [":my_tool_lib"],
        visibility = ["//visibility:public"],
    )

因此，当我点击bazel run时，它将构建my_tool go二进制文件，go测试my_test可以使用这个二进制文件(参见go测试的deps字段)。

在CI中，我碰到了以下错误：

    ERROR: /home/agent/work/.go/src/some/of/my/path/BUILD.bazel:20:8: in go_test rule //some/of/my/path:my_test:
    Traceback (most recent call last):
      File "/home/agent/.cache/bazel/_bazel_agent/40f5e2a2e18a7cdb4cd075f919d8072b/external/io_bazel_rules_go/go/private/rules/test.bzl", line 66, column 43, in _go_test_impl
        internal_source = go.library_to_source(go, ctx.attr, internal_library, ctx.coverage_instrumented())
      File "/home/agent/.cache/bazel/_bazel_agent/40f5e2a2e18a7cdb4cd075f919d8072b/external/io_bazel_rules_go/go/private/context.bzl", line 247, column 26, in _library_to_source
        _check_binary_dep(go, dep, "deps")
      File "/home/agent/.cache/bazel/_bazel_agent/40f5e2a2e18a7cdb4cd075f919d8072b/external/io_bazel_rules_go/go/private/context.bzl", line 295, column 13, in _check_binary_dep
        fail("rule {rule} depends on executable {dep} via {edge}. This is not safe for cross-compilation. Depend on go_library instead.".format(
    Error in fail: rule //some/of/my/path:my_test depends on executable //some/of/my/path/my_tool:my_tool via deps. This is not safe for cross-compilation. Depend on go_library instead.
    ERROR: Analysis of target '//some/of/my/path:my_test' failed; build aborted: Analysis of target '//some/of/my/path:my_test' failed
    INFO: Elapsed time: 79.552s
    INFO: 0 processes.
    FAILED: Build did NOT complete successfully (595 packages loaded, 12182 targets configured)
    ERROR: Build failed. Not running target
    FAILED: Build did NOT complete successfully (595 packages loaded, 12182 targets configured)
    Process exited with code 1

但我的目标是使用二进制。我该如何改变吐露来实现这一点呢？

Answer 1

你想要的是data而不是deps。deps是链接到二进制中的东西，data是运行时二进制使用的东西。

一旦您的二进制文件在data中，使用runfiles.go运行它。将@io_bazel_rules_go//go/tools/bazel:go_default_library添加到deps (它是您希望链接的库)，然后使用FindBinary查找路径。