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// Copyright 2012 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.
package main
import (
"flag"
"fmt"
"os"
"runtime"
"strings"
)
func usage() {
xprintf(`usage: go tool dist [command]
Commands are:
banner print installation banner
bootstrap rebuild everything
clean deletes all built files
env [-p] print environment (-p: include $PATH)
install [dir] install individual directory
list [-json] list all supported platforms
test [-h] run Go test(s)
version print Go version
All commands take -v flags to emit extra information.
`)
xexit(2)
}
// commands records the available commands.
var commands = map[string]func(){
"banner": cmdbanner,
"bootstrap": cmdbootstrap,
"clean": cmdclean,
"env": cmdenv,
"install": cmdinstall,
"list": cmdlist,
"test": cmdtest,
"version": cmdversion,
}
// main takes care of OS-specific startup and dispatches to xmain.
func main() {
os.Setenv("TERM", "dumb") // disable escape codes in clang errors
// provide -check-armv6k first, before checking for $GOROOT so that
// it is possible to run this check without having $GOROOT available.
if len(os.Args) > 1 && os.Args[1] == "-check-armv6k" {
useARMv6K() // might fail with SIGILL
println("ARMv6K supported.")
os.Exit(0)
}
gohostos = runtime.GOOS
switch gohostos {
case "aix":
// uname -m doesn't work under AIX
gohostarch = "ppc64"
case "darwin":
// macOS 10.9 and later require clang
defaultclang = true
case "freebsd":
// Since FreeBSD 10 gcc is no longer part of the base system.
defaultclang = true
case "openbsd":
// OpenBSD ships with GCC 4.2, which is now quite old.
defaultclang = true
case "plan9":
gohostarch = os.Getenv("objtype")
if gohostarch == "" {
fatalf("$objtype is unset")
}
case "solaris", "illumos":
// Solaris and illumos systems have multi-arch userlands, and
// "uname -m" reports the machine hardware name; e.g.,
// "i86pc" on both 32- and 64-bit x86 systems. Check for the
// native (widest) instruction set on the running kernel:
out := run("", CheckExit, "isainfo", "-n")
if strings.Contains(out, "amd64") {
gohostarch = "amd64"
}
if strings.Contains(out, "i386") {
gohostarch = "386"
}
case "windows":
exe = ".exe"
}
sysinit()
if gohostarch == "" {
// Default Unix system.
out := run("", CheckExit, "uname", "-m")
outAll := run("", CheckExit, "uname", "-a")
switch {
case strings.Contains(outAll, "RELEASE_ARM64"):
// MacOS prints
// Darwin p1.local 21.1.0 Darwin Kernel Version 21.1.0: Wed Oct 13 17:33:01 PDT 2021; root:xnu-8019.41.5~1/RELEASE_ARM64_T6000 x86_64
// on ARM64 laptops when there is an x86 parent in the
// process tree. Look for the RELEASE_ARM64 to avoid being
// confused into building an x86 toolchain.
gohostarch = "arm64"
case strings.Contains(out, "x86_64"), strings.Contains(out, "amd64"):
gohostarch = "amd64"
case strings.Contains(out, "86"):
gohostarch = "386"
if gohostos == "darwin" {
// Even on 64-bit platform, some versions of macOS uname -m prints i386.
// We don't support any of the OS X versions that run on 32-bit-only hardware anymore.
gohostarch = "amd64"
}
case strings.Contains(out, "aarch64"), strings.Contains(out, "arm64"):
gohostarch = "arm64"
case strings.Contains(out, "arm"):
gohostarch = "arm"
if gohostos == "netbsd" && strings.Contains(run("", CheckExit, "uname", "-p"), "aarch64") {
gohostarch = "arm64"
}
case strings.Contains(out, "ppc64le"):
gohostarch = "ppc64le"
case strings.Contains(out, "ppc64"):
gohostarch = "ppc64"
case strings.Contains(out, "mips64"):
gohostarch = "mips64"
if elfIsLittleEndian(os.Args[0]) {
gohostarch = "mips64le"
}
case strings.Contains(out, "mips"):
gohostarch = "mips"
if elfIsLittleEndian(os.Args[0]) {
gohostarch = "mipsle"
}
case strings.Contains(out, "riscv64"):
gohostarch = "riscv64"
case strings.Contains(out, "s390x"):
gohostarch = "s390x"
case gohostos == "darwin", gohostos == "ios":
if strings.Contains(run("", CheckExit, "uname", "-v"), "RELEASE_ARM64_") {
gohostarch = "arm64"
}
case gohostos == "openbsd":
if strings.Contains(run("", CheckExit, "uname", "-p"), "mips64") {
gohostarch = "mips64"
}
default:
fatalf("unknown architecture: %s", out)
}
}
if gohostarch == "arm" || gohostarch == "mips64" || gohostarch == "mips64le" {
maxbg = min(maxbg, runtime.NumCPU())
}
bginit()
if len(os.Args) > 1 && os.Args[1] == "-check-goarm" {
useVFPv1() // might fail with SIGILL
println("VFPv1 OK.")
useVFPv3() // might fail with SIGILL
println("VFPv3 OK.")
os.Exit(0)
}
xinit()
xmain()
xexit(0)
}
// The OS-specific main calls into the portable code here.
func xmain() {
if len(os.Args) < 2 {
usage()
}
cmd := os.Args[1]
os.Args = os.Args[1:] // for flag parsing during cmd
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "usage: go tool dist %s [options]\n", cmd)
flag.PrintDefaults()
os.Exit(2)
}
if f, ok := commands[cmd]; ok {
f()
} else {
xprintf("unknown command %s\n", cmd)
usage()
}
}
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