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67 lines
2.0 KiB
Python
67 lines
2.0 KiB
Python
def _translate_cpu(arch):
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if arch in ["i386", "i486", "i586", "i686", "i786", "x86"]:
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return "x86_32"
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if arch in ["amd64", "x86_64", "x64"]:
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return "x86_64"
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if arch in ["ppc", "ppc64", "ppc64le"]:
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return "ppc"
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if arch in ["arm", "armv7l"]:
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return "arm"
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if arch in ["aarch64"]:
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return "aarch64"
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if arch in ["s390x", "s390"]:
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return "s390x"
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if arch in ["mips64el", "mips64"]:
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return "mips64"
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if arch in ["riscv64"]:
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return "riscv64"
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return None
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def _translate_os(os):
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if os.startswith("mac os"):
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return "osx"
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if os.startswith("freebsd"):
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return "freebsd"
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if os.startswith("openbsd"):
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return "openbsd"
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if os.startswith("linux"):
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return "linux"
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if os.startswith("windows"):
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return "windows"
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return None
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def _host_platform_repo_impl(rctx):
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cpu = _translate_cpu(rctx.os.arch)
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os = _translate_os(rctx.os.name)
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cpu = "" if cpu == None else " '@platforms//cpu:%s',\n" % cpu
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os = "" if os == None else " '@platforms//os:%s',\n" % os
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rctx.file("BUILD.bazel", """
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# DO NOT EDIT: automatically generated BUILD file
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exports_files(["constraints.bzl"])
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""")
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rctx.file("constraints.bzl", """
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# DO NOT EDIT: automatically generated constraints list
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HOST_CONSTRAINTS = [
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%s%s]
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""" % (cpu, os))
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host_platform_repo = repository_rule(
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implementation = _host_platform_repo_impl,
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doc = """Generates constraints for the host platform. The constraints.bzl
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file contains a single <code>HOST_CONSTRAINTS</code> variable, which is a
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list of strings, each of which is a label to a <code>constraint_value</code>
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for the host platform.""",
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)
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def _host_platform_impl(_mctx):
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host_platform_repo(name = "host_platform")
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host_platform = module_extension(
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implementation = _host_platform_impl,
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doc = """Generates a <code>host_platform_repo</code> repo named
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<code>host_platform</code>, containing constraints for the host platform.""",
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)
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