英文:
Bazel build docker container with local golang module
问题
让我先说一下，我对Bazel还不熟悉。我正在尝试从一个包含本地模块引用的golang项目构建一个Docker容器。
首先，我正在创建一个本地的golang模块：
go mod init go-example
这是项目的一般结构：
.
├── BUILD.bazel
├── WORKSPACE
├── cmd
│ └── hello
│ ├── BUILD.bazel
│ └── main.go
├── go.mod
├── go.sum
└── pkg
└── echo
├── BUILD.bazel
└── echo.go
在main.go中，我正在从本地模块导入pkg/echo。
import (
"go-example/pkg/echo"
)
(top level BUILD.bazel)
...
# gazelle:prefix go-example
✅ 默认的bazel构建可以工作
$ bazel run //:gazelle
$ bazel build //cmd/hello
❌ Docker构建失败。我得到以下错误：
(cmd/hello/BUILD.bazel)
...
go_image(
name = "docker",
srcs = ["main.go"],
importpath = "go-example/cmd/hello",
)
$ bazel build //cmd/hello:docker
...
compilepkg: missing strict dependencies:
/private/var/tmp/_bazel[...]/__main__/cmd/hello/main.go: import of "go-example/pkg/echo"
No dependencies were provided.
英文:
Let me start by saying I'm new to Bazel. I am trying to build a Docker container from a golang project that contains local module references.
First I'm creating a local golang module:
go mod init go-example
Here is the general project structure:
.
├── BUILD.bazel
├── WORKSPACE
├── cmd
│   └── hello
│   ├── BUILD.bazel
│   └── main.go
├── go.mod
├── go.sum
└── pkg
   └── echo
   ├── BUILD.bazel
   └── echo.go
In main.go I am importing pkg/echo from the local module.
import (
"go-example/pkg/echo"
)
(top level BUILD.bazel)
...
# gazelle:prefix go-example
✅ Default bazel build works
$ bazel run //:gazelle
$ bazel build //cmd/hello
❌ Docker build fails. I get the following error:
(cmd/hello/BUILD.bazel)
...
go_image(
name = "docker",
srcs = ["main.go"],
importpath = "go-example/cmd/hello",
)
$ bazel build //cmd/hello:docker
...
compilepkg: missing strict dependencies:
/private/var/tmp/_bazel[...]/__main__/cmd/hello/main.go: import of "go-example/pkg/echo"
No dependencies were provided.
答案1
得分: 1
找到了，如果有其他人遇到这个问题，我在这里发布。
答案很简单-你需要在go_image规则内嵌入go_library规则。这是我的cmd/hello/BUILD.bazel文件，我还在其中将go镜像嵌入到一个Docker容器中：
load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library")
load("@io_bazel_rules_docker//go:image.bzl", "go_image")
load("@io_bazel_rules_docker//container:container.bzl", "container_image")
go_library(
name = "hello_lib",
srcs = ["main.go"],
importpath = "go-example/cmd/hello",
visibility = ["//visibility:private"],
deps = ["//pkg/echo"],
)
go_binary(
name = "hello",
embed = [":hello_lib"],
visibility = ["//visibility:public"],
)
go_image(
name = "hello_go_image",
embed = [":hello_lib"],
goarch = "amd64",
goos = "linux",
pure = "on",
)
container_image(
name = "docker",
base = ":hello_go_image",
)
现在可以使用bazel build //cmd/hello:docker来运行了。
英文:
Figured it out, posting here if anyone else stumbles on this.
The answer is simple - you need to embed the go_library rule within the go_image rule. Here is my cmd/hello/BUILD.bazel where I also embed the go image in a docker container
load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library")
load("@io_bazel_rules_docker//go:image.bzl", "go_image")
load("@io_bazel_rules_docker//container:container.bzl", "container_image")
go_library(
name = "hello_lib",
srcs = ["main.go"],
importpath = "go-example/cmd/hello",
visibility = ["//visibility:private"],
deps = ["//pkg/echo"],
)
go_binary(
name = "hello",
embed = [":hello_lib"],
visibility = ["//visibility:public"],
)
go_image(
name = "hello_go_image",
embed = [":hello_lib"],
goarch = "amd64",
goos = "linux",
pure = "on",
)
container_image(
name = "docker",
base = ":hello_go_image",
)
Now it works to run bazel build //cmd/hello:docker
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