mirror of
https://github.com/bazel-contrib/bazel-lib
synced 2024-11-30 01:41:21 +00:00
274 lines
9.7 KiB
Python
274 lines
9.7 KiB
Python
"Provide access to a BSD tar"
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load(":repo_utils.bzl", "repo_utils")
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BSDTAR_PLATFORMS = {
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"linux_amd64": struct(
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compatible_with = [
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"@platforms//os:linux",
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"@platforms//cpu:x86_64",
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],
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),
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"linux_arm64": struct(
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compatible_with = [
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"@platforms//os:linux",
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"@platforms//cpu:aarch64",
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],
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),
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"windows_amd64": struct(
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release_platform = "win64",
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compatible_with = [
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"@platforms//os:windows",
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"@platforms//cpu:x86_64",
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],
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),
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# WARNING: host toolchain should always come last to make it a fallback toolchain.
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"host": struct(
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# loaded by the macro
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compatible_with = "HOST_CONSTRAINTS",
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),
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}
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WINDOWS_DEPS = (
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"e06f10043b1b148eb38ad06cff678af05beade0bdd2edd8735a198c521fa3993",
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"https://github.com/libarchive/libarchive/releases/download/v3.7.2/libarchive-v3.7.2-amd64.zip",
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)
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# note, using Ubuntu Focal packages as they link with older glibc versions.
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# Ubuntu Jammy packages will fail on ubuntu 20.02 with
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# bsdtar: /lib/x86_64-linux-gnu/libc.so.6: version `GLIBC_2.33' not found
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# bsdtar: /lib/x86_64-linux-gnu/libc.so.6: version `GLIBC_2.34' not found
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#
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# TODO: this is only a partial listing of the transitive deps of libarchive-tools
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# so we expect a bunch of compress modes are broken, for example.
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LINUX_LIB_DEPS = {
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"linux_arm64": [
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(
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"6d18525e248e84b8a4ee39a226fd1195ca9b9d0d5a1c7909ae4f997d46378848",
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"http://ports.ubuntu.com/pool/main/n/nettle/libnettle7_3.5.1+really3.5.1-2ubuntu0.2_arm64.deb",
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),
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(
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"aa5e31d05a9d6bde8093137bd1c82b5a20a5f470bd5109642014f895c20f323a",
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"http://ports.ubuntu.com/pool/main/liba/libarchive/libarchive13_3.4.0-2ubuntu1_arm64.deb",
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),
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(
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"6d089f878507b536d8ca51b1ad80a80706a1dd7dbbcce7600800d3f9f98be2ab",
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"http://ports.ubuntu.com/pool/main/liba/libarchive/libarchive-tools_3.2.1-2~ubuntu16.04.1_arm64.deb",
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),
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(
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"6242892cb032859044ddfcfbe61bac5678a95c585d8fff4525acaf45512e3d39",
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"http://ports.ubuntu.com/pool/main/libx/libxml2/libxml2_2.9.10+dfsg-5_arm64.deb",
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),
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(
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"6302e309ab002af30ddfa0d68de26c68f7c034ed2f45b1d97a712bff1a03999a",
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"http://ports.ubuntu.com/pool/main/i/icu/libicu66_66.1-2ubuntu2_arm64.deb",
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),
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],
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"linux_amd64": [
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# https://packages.ubuntu.com/focal/amd64/libarchive-tools/download
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(
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"12a19878d34b407e6f4893d3b26b7758a26c5534a066d76184c8b764b2df1652",
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"http://security.ubuntu.com/ubuntu/pool/universe/liba/libarchive/libarchive-tools_3.4.0-2ubuntu1.2_amd64.deb",
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),
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# https://packages.ubuntu.com/focal/amd64/libarchive13/download
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(
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"8ba7507f61bb3ea8da488702ec0badcbfb726d36ea6886e3421ac59082aaf2d1",
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"http://security.ubuntu.com/ubuntu/pool/main/liba/libarchive/libarchive13_3.4.0-2ubuntu1.2_amd64.deb",
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),
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# https://packages.ubuntu.com/focal/amd64/libnettle7/download
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(
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"3496aed83407fde71e0dc5988b28e8fd7f07a2f27fcf3e0f214c7cd86667eecd",
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"http://security.ubuntu.com/ubuntu/pool/main/n/nettle/libnettle7_3.5.1+really3.5.1-2ubuntu0.2_amd64.deb",
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),
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# https://packages.ubuntu.com/focal/amd64/libxml2/download
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(
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"cef3871873e5e7e7f1d01afec4d35f15504a9d8a0afbe56f57037e92f7f8e850",
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"http://security.ubuntu.com/ubuntu/pool/main/libx/libxml2/libxml2_2.9.10+dfsg-5ubuntu0.20.04.7_amd64.deb",
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),
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# https://packages.ubuntu.com/focal/amd64/libicu66/download
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(
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"00d0de456134668f41bd9ea308a076bc0a6a805180445af8a37209d433f41efe",
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"http://security.ubuntu.com/ubuntu/pool/main/i/icu/libicu66_66.1-2ubuntu2.1_amd64.deb",
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),
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],
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}
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def _find_usable_system_tar(rctx, tar_name):
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tar = rctx.which(tar_name)
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if not tar:
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fail("tar not found on PATH, and we don't handle this case yet")
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# Run tar --version and see if we are satisfied to use it
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tar_version = rctx.execute([tar, "--version"]).stdout.strip()
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# TODO: also check if it's really ancient or compiled without gzip support or something?
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# TODO: document how users could fetch the source and compile it themselves
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if tar_version.find("bsdtar") >= 0:
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return tar
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fail("tar isn't a BSD tar")
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def _bsdtar_binary_repo(rctx):
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tar_name = "tar.exe" if repo_utils.is_windows(rctx) else "tar"
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build_header = """\
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# @generated by @aspect_bazel_lib//lib/private:tar_toolchain.bzl
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load("@aspect_bazel_lib//lib/private:tar_toolchain.bzl", "tar_toolchain")
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package(default_visibility = ["//visibility:public"])
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"""
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# On MacOS, the system `tar` binary on the PATH should already work
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if rctx.attr.platform == "host":
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tar = _find_usable_system_tar(rctx, tar_name)
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output = rctx.path(tar_name)
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rctx.symlink(tar, output)
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rctx.file("BUILD.bazel", build_header + """tar_toolchain(name = "bsdtar_toolchain", binary = "tar")""")
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return
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if repo_utils.is_windows(rctx):
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rctx.download_and_extract(
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url = WINDOWS_DEPS[1],
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type = "zip",
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sha256 = WINDOWS_DEPS[0],
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)
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rctx.file("BUILD.bazel", build_header + """tar_toolchain(name = "bsdtar_toolchain", binary = "libarchive/bin/bsdtar.exe")""")
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return
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# Other platforms, we have more work to do.
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libs_dir = "usr/lib/x86_64-linux-gnu" if rctx.attr.platform.endswith("amd64") else "usr/lib/aarch64-linux-gnu"
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for lib in LINUX_LIB_DEPS[rctx.attr.platform]:
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rctx.download_and_extract(
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url = lib[1],
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type = "deb",
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sha256 = lib[0],
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)
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rctx.extract("data.tar.xz")
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rctx.file("bsdtar.sh", """#!/usr/bin/env bash
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readonly wksp="$(dirname "${{BASH_SOURCE[0]}}")"
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LD_LIBRARY_PATH=$wksp/{libs_dir} exec $wksp/usr/bin/bsdtar $@
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""".format(name = rctx.name, libs_dir = libs_dir))
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rctx.file("BUILD.bazel", build_header + """\
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tar_toolchain(
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name = "bsdtar_toolchain",
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files = glob(["{libs}/*.so.*"]) + ["usr/bin/bsdtar"],
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binary = "bsdtar.sh",
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visibility = ["//visibility:public"],
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)
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""".format(libs = libs_dir, name = rctx.name))
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bsdtar_binary_repo = repository_rule(
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implementation = _bsdtar_binary_repo,
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attrs = {
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"platform": attr.string(mandatory = True, values = BSDTAR_PLATFORMS.keys()),
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},
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)
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TarInfo = provider(
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doc = "Provide info for executing BSD tar",
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fields = {
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"binary": "bsdtar executable",
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},
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)
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def _tar_toolchain_impl(ctx):
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binary = ctx.executable.binary
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# Make the $(BSDTAR_BIN) variable available in places like genrules.
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# See https://docs.bazel.build/versions/main/be/make-variables.html#custom_variables
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template_variables = platform_common.TemplateVariableInfo({
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"BSDTAR_BIN": binary.path,
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})
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default_info = DefaultInfo(
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files = depset(ctx.files.binary + ctx.files.files),
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)
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tarinfo = TarInfo(
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binary = binary,
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)
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# Export all the providers inside our ToolchainInfo
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# so the resolved_toolchain rule can grab and re-export them.
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toolchain_info = platform_common.ToolchainInfo(
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tarinfo = tarinfo,
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template_variables = template_variables,
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default = default_info,
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)
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return [toolchain_info, template_variables, default_info]
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tar_toolchain = rule(
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implementation = _tar_toolchain_impl,
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attrs = {
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"binary": attr.label(
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doc = "a command to find on the system path",
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allow_files = True,
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executable = True,
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cfg = "exec",
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),
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"files": attr.label_list(allow_files = True),
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},
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)
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def _tar_toolchains_repo_impl(rctx):
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# Expose a concrete toolchain which is the result of Bazel resolving the toolchain
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# for the execution or target platform.
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# Workaround for https://github.com/bazelbuild/bazel/issues/14009
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starlark_content = """\
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# @generated by @aspect_bazel_lib//lib/private:tar_toolchain.bzl
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# Forward all the providers
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def _resolved_toolchain_impl(ctx):
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toolchain_info = ctx.toolchains["@aspect_bazel_lib//lib:tar_toolchain_type"]
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return [
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toolchain_info,
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toolchain_info.default,
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toolchain_info.tarinfo,
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toolchain_info.template_variables,
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]
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# Copied from java_toolchain_alias
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# https://cs.opensource.google/bazel/bazel/+/master:tools/jdk/java_toolchain_alias.bzl
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resolved_toolchain = rule(
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implementation = _resolved_toolchain_impl,
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toolchains = ["@aspect_bazel_lib//lib:tar_toolchain_type"],
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incompatible_use_toolchain_transition = True,
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)
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"""
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rctx.file("defs.bzl", starlark_content)
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build_content = """# @generated by @aspect_bazel_lib//lib/private:tar_toolchain.bzl
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load(":defs.bzl", "resolved_toolchain")
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load("@local_config_platform//:constraints.bzl", "HOST_CONSTRAINTS")
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resolved_toolchain(name = "resolved_toolchain", visibility = ["//visibility:public"])"""
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for [platform, meta] in BSDTAR_PLATFORMS.items():
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build_content += """
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toolchain(
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name = "{platform}_toolchain",
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exec_compatible_with = {compatible_with},
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toolchain = "@{user_repository_name}_{platform}//:bsdtar_toolchain",
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toolchain_type = "@aspect_bazel_lib//lib:tar_toolchain_type",
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)
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""".format(
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platform = platform,
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user_repository_name = rctx.attr.user_repository_name,
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compatible_with = meta.compatible_with,
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)
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rctx.file("BUILD.bazel", build_content)
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tar_toolchains_repo = repository_rule(
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_tar_toolchains_repo_impl,
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doc = """Creates a repository that exposes a tar_toolchain_type target.""",
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attrs = {
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"user_repository_name": attr.string(doc = "Base name for toolchains repository"),
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},
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)
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