bazel pypi宏自边缘

Question

我正在努力让 bazel 与 pypi 依赖项一起工作。

./pypi.bzl:

def _impl(ctx):
  ctx.actions.run_shell(
    command = "pip download %s" % ctx.package
  )

_pypi_package = rule(
  implementation=_impl,
  attrs={"package": attr.label(mandatory=True)},
)

def pypi_package(package):
  _pypi_package(name = package, package = package)

./构建：

py_binary(
  name = "app",
  srcs = ["app.py"],
  deps = [":python-dateutil"]
)

load("//:pypi.bzl", "pypi_package")

pypi_package(
  package="python-dateutil",
)

正在尝试构建：

$ bazel build app
ERROR: /path/to/cwd/BUILD:9:1: in _pypi_package rule //:python-dateutil: cycle in dependency graph:
    //:app
.-> //:python-dateutil [self-edge]
`--
This cycle occurred because of a configuration option.
ERROR: Analysis of target '//:app' failed; build aborted.
INFO: Elapsed time: 0.219s

不知道这是否是处理外部依赖项的正确方法，但忽略了这一点，我不明白这里的 self-dep 是从哪里来的。事实上，我根本没有看到我在为 pypi_package 规则声明任何依赖项。怎么回事？

Answer 1

问题是 attr.label："label" 这里表示 BUILD 标签。我应该一直在使用 attr.string.

bazel pypi宏自边缘

bazel pypi macro self-edge

pypi

bazel