mirror of https://github.com/bazelbuild/rules_cc
70 lines
1.6 KiB
Go
70 lines
1.6 KiB
Go
/*
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The convert_crosstool_to_starlark script takes in a CROSSTOOL file and
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generates a Starlark rule.
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See https://github.com/bazelbuild/bazel/issues/5380
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Example usage:
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bazel run \
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@rules_cc//tools/migration:convert_crosstool_to_starlark -- \
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--crosstool=/path/to/CROSSTOOL \
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--output_location=/path/to/cc_config.bzl
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*/
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package main
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import (
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"flag"
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"fmt"
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"io/ioutil"
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"os"
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"log"
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"github.com/golang/protobuf/proto"
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crosstoolpb "third_party/com/github/bazelbuild/bazel/src/main/protobuf/crosstool_config_go_proto"
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"tools/migration/crosstooltostarlarklib"
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)
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var (
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crosstoolLocation = flag.String(
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"crosstool", "", "Location of the CROSSTOOL file")
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outputLocation = flag.String(
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"output_location", "", "Location of the output .bzl file")
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)
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func main() {
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flag.Parse()
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if *crosstoolLocation == "" {
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log.Fatalf("Missing mandatory argument 'crosstool'")
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}
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if *outputLocation == "" {
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log.Fatalf("Missing mandatory argument 'output_location'")
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}
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in, err := ioutil.ReadFile(*crosstoolLocation)
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if err != nil {
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log.Fatalf("Error reading CROSSTOOL file:", err)
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}
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crosstool := &crosstoolpb.CrosstoolRelease{}
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if err := proto.UnmarshalText(string(in), crosstool); err != nil {
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log.Fatalf("Failed to parse CROSSTOOL:", err)
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}
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file, err := os.Create(*outputLocation)
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if err != nil {
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log.Fatalf("Error creating output file:", err)
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}
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defer file.Close()
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rule, err := crosstooltostarlarklib.Transform(crosstool)
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if err != nil {
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log.Fatalf("Error converting CROSSTOOL to a Starlark rule:", err)
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}
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if _, err := file.WriteString(rule); err != nil {
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log.Fatalf("Error converting CROSSTOOL to a Starlark rule:", err)
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}
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fmt.Println("Success!")
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}
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