您好,我正在尝试为 Fn 项目设置一个工具链。该方法是为 GitHub 中可用的每个二进制文件设置一个工具链,然后理论上在规则中使用它。
我有一个通用包,其中包含可用的二进制文件:
default_version = "0.5.44"
os_list = [
"linux",
"mac",
"windows"
]
def get_bin_name(os):
return "fn_cli_%s_bin" % os
下载部分如下所示:
load(":common.bzl", "get_bin_name", "os_list", "default_version")
_url = "https://github.com/fnproject/cli/releases/download/{version}/{file}"
_os_to_file = {
"linux" : "fn_linux",
"mac" : "fn_mac",
"windows" : "fn.exe",
}
def _fn_binary(os):
name = get_bin_name(os)
file = _os_to_file.get(os)
url = _url.format(
file = file,
version = default_version
)
native.http_file(
name = name,
urls = [url],
executable = True
)
def fn_binaries():
"""
Installs the hermetic binary for Fn.
"""
for os in os_list:
_fn_binary(os)
然后我像这样设置工具链:
load(":common.bzl", "get_bin_name", "os_list")
_toolchain_type = "toolchain_type"
FnInfo = provider(
doc = "Information about the Fn Framework CLI.",
fields = {
"bin" : "The Fn Framework binary."
}
)
def _fn_cli_toolchain(ctx):
toolchain_info = platform_common.ToolchainInfo(
fn_info = FnInfo(
bin = ctx.attr.bin
)
)
return [toolchain_info]
fn_toolchain = rule(
implementation = _fn_cli_toolchain,
attrs = {
"bin" : attr.label(mandatory = True)
}
)
def _add_toolchain(os):
toolchain_name = "fn_cli_%s" % os
native_toolchain_name = "fn_cli_%s_toolchain" % os
bin_name = get_bin_name(os)
compatibility = ["@bazel_tools//platforms:%s" % os]
fn_toolchain(
name = toolchain_name,
bin = ":%s" % bin_name,
visibility = ["//visibility:public"]
)
native.toolchain(
name = native_toolchain_name,
toolchain = ":%s" % toolchain_name,
toolchain_type = ":%s" % _toolchain_type,
target_compatible_with = compatibility
)
def setup_toolchains():
"""
Macro te set up the toolchains for the different platforms
"""
native.toolchain_type(name = _toolchain_type)
for os in os_list:
_add_toolchain(os)
def fn_register():
"""
Registers the Fn toolchains.
"""
path = "//tools/bazel_rules/fn/internal/cli:fn_cli_%s_toolchain"
for os in os_list:
native.register_toolchains(path % os)
在我的构建文件中,我调用 setup_toolchains:
load(":toolchain.bzl", "setup_toolchains")
setup_toolchains()
通过这个设置,我有一个如下所示的规则:
_toolchain = "//tools/bazel_rules/fn/cli:toolchain_type"
def _fn(ctx):
print("HEY")
bin = ctx.toolchains[_toolchain].fn_info.bin
print(bin)
# TEST RULE
fn = rule(
implementation = _fn,
toolchains = [_toolchain]
)
工作空间:
workspace(name = "basicwindow")
load("//tools/bazel_rules/fn:defs.bzl", "fn_binaries", "fn_register")
fn_binaries()
fn_register()
当我使用 bazel query //tools/bazel_rules/fn/internal/cli:fn_cli_linux_bin
查询不同的二进制文件时他们在那里,但正在打电话bazel build //...
导致错误,提示:
ERROR: /Users/marcguilera/Code/Marc/basicwindow/tools/bazel_rules/fn/internal/cli/BUILD.bazel:2:1: in bin attribute of fn_toolchain rule //tools/bazel_rules/fn/internal/cli:fn_cli_windows: rule '//tools/bazel_rules/fn/internal/cli:fn_cli_windows_bin' does not exist. Since this rule was created by the macro 'setup_toolchains', the error might have been caused by the macro implementation in /Users/marcguilera/Code/Marc/basicwindow/tools/bazel_rules/fn/internal/cli/toolchain.bzl:35:15
ERROR: Analysis of target '//tools/bazel_rules/fn/internal/cli:fn_cli_windows' failed; build aborted: Analysis of target '//tools/bazel_rules/fn/internal/cli:fn_cli_windows' failed; build aborted
INFO: Elapsed time: 0.079s
INFO: 0 processes.
FAILED: Build did NOT complete successfully (0 packages loaded, 0 targets configured)
我尝试按照文档中的工具链教程进行操作,但无法使其工作。另一个有趣的事情是,我实际上使用的是 mac,所以工具链兼容性似乎也是错误的。
我在存储库中使用此工具链,因此路径有所不同,但 here's为了便于阅读,仅包含 fn 内容的存储库。
最佳答案
有两件事:
一,我怀疑这是您的实际问题:https://github.com/bazelbuild/bazel/issues/6828 问题的核心在于,如果 toolchain_type 目标位于外部存储库中,那么它总是需要通过完全限定名称来引用,而不是通过本地限定名称来引用。
第二个是更基本的:这里有很多 Starlark 宏正在生成其他目标,而且很难阅读。实际上,删除许多宏会简单得多,例如 _fn_binary、fn_binaries 和 _add_toolchains。只需让 setup_toolchains 直接创建所需的 native.toolchain
目标,并使用一个存储库宏调用 http_archive
三次来声明三组不同的二进制文件。这将使代码更容易阅读,从而更容易调试。
对于调试工具链,我遵循两个步骤:首先,验证工具存储库是否存在并且可以直接访问,然后检查工具链注册和解析。
深入几个级别后,您似乎正在调用 http_archive
,将新存储库命名为 @linux
,并下载特定的二进制文件。这不是 http_archive 的工作方式:它期望获取一个 zip 文件(或 tar.gz 文件),解压该文件,并在其中找到一个 WORKSPACE 和至少一个 BUILD 文件。
我的建议:简化宏,明确定义外部存储库,然后探索使用工具链解析来选择正确的存储库。
我很乐意根据需要帮助回答更多问题。
关于python - 工具链未下载工具,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/54467249/