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// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build ignore
package main
import (
"bytes"
"fmt"
"log"
"os"
"strings"
)
var gooses []string
func main() {
data, err := os.ReadFile("../../go/build/syslist.go")
if err != nil {
log.Fatal(err)
}
const goosPrefix = `var knownOS = map[string]bool{`
inGOOS := false
for _, line := range strings.Split(string(data), "\n") {
if strings.HasPrefix(line, goosPrefix) {
inGOOS = true
} else if inGOOS && strings.HasPrefix(line, "}") {
break
} else if inGOOS {
goos := strings.Fields(line)[0]
goos = strings.TrimPrefix(goos, `"`)
goos = strings.TrimSuffix(goos, `":`)
gooses = append(gooses, goos)
}
}
for _, target := range gooses {
if target == "nacl" {
continue
}
var tags []string
if target == "linux" {
tags = append(tags, "!android") // must explicitly exclude android for linux
}
if target == "solaris" {
tags = append(tags, "!illumos") // must explicitly exclude illumos for solaris
}
if target == "darwin" {
tags = append(tags, "!ios") // must explicitly exclude ios for darwin
}
tags = append(tags, target) // must explicitly include target for bootstrapping purposes
var buf bytes.Buffer
fmt.Fprintf(&buf, "// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.\n\n")
fmt.Fprintf(&buf, "//go:build %s\n\n", strings.Join(tags, " && "))
fmt.Fprintf(&buf, "package goos\n\n")
fmt.Fprintf(&buf, "const GOOS = `%s`\n\n", target)
for _, goos := range gooses {
value := 0
if goos == target {
value = 1
}
fmt.Fprintf(&buf, "const Is%s = %d\n", strings.Title(goos), value)
}
err := os.WriteFile("zgoos_"+target+".go", buf.Bytes(), 0666)
if err != nil {
log.Fatal(err)
}
}
}
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