我刚刚开始与 Bazel 合作。所以,我提前道歉,我无法弄清楚这一点。
我正在尝试运行一个命令,将一堆文件输出到一个目录并使该目录可用于后续目标。我有两种不同的尝试:
- 使用一般规则
- 写我自己的规则
我天真地希望只用genrule
. 但是,您似乎不能说“我不确切知道该命令将输出什么”并将目录放在outs
. 现在我正在尝试编写一个可以使用的规则,ctx.actions.declare_directory
但我还没有完全正确。我似乎无法摆脱tools
我的工作空间并进入我的规则。
我的一般尝试看起来像这样:
genrule(
name = "doit",
srcs = [
"doitConfigA",
"doitConfigB",
],
cmd = 'HOME=. ./$(location path/to/doit) install',
# Neither of the below outs work - seems like bazel wants to know
# exactly this list of files. I don't know the files that
# will be output ahead of time.
# This one looks at the `out_dir` that I already have and
# expects the files to be the same which they might not be
outs = glob(["out_dir/**/*.*"]),
# this fails with:
# "declared output 'out_dir' was not
# created by genrule. This is probably because the genrule actually
# didn't create this output, or because the output was a directory
# and the genrule was run remotely (note that only the contents of
# declared file outputs are copied from genrules run remotely)"
outs = ['out_dir'],
tools = ['path/to/doit'],
)
我的自定义规则尝试如下所示:
def _impl(ctx):
dir = ctx.actions.declare_directory("out_dir")
ctx.actions.run_shell(
outputs=[dir],
progress_message="Running doit install ...",
command="HOME=. ./path/to/doit install",
tools=[ctx.attr.tools],
)
doit = rule(
implementation=_impl,
attrs={
"tools": attr.label_list(allow_files=True),
},
outputs={"out": "out_dir"},
)
然后,为了运行我的doit
规则,我的 BUILD 文件如下所示:
doit(
name = 'doit',
tools = ['path/to/doit'],
)
在我的 genrule 中,该命令运行,但它似乎不喜欢我尝试在 中使用目录outs
。在我的自定义规则中,我似乎无法告诉 Bazel 我想./path/to/doit
用作工作区中的工具,例如expected type 'File' for 'tools' element but got type 'list' instead
...
似乎我必须缺少一些基本的东西,因为这肯定是运行命令并将一堆未知内容输出到目录的常见情况?