github.com/lovishpuri/go-40569/src@v0.0.0-20230519171745-f8623e7c56cf/bootstrap.bash (about) 1 #!/usr/bin/env bash 2 # Copyright 2015 The Go Authors. All rights reserved. 3 # Use of this source code is governed by a BSD-style 4 # license that can be found in the LICENSE file. 5 6 # When run as (for example) 7 # 8 # GOOS=linux GOARCH=ppc64 bootstrap.bash 9 # 10 # this script cross-compiles a toolchain for that GOOS/GOARCH 11 # combination, leaving the resulting tree in ../../go-${GOOS}-${GOARCH}-bootstrap. 12 # That tree can be copied to a machine of the given target type 13 # and used as $GOROOT_BOOTSTRAP to bootstrap a local build. 14 # 15 # Only changes that have been committed to Git (at least locally, 16 # not necessary reviewed and submitted to master) are included in the tree. 17 # 18 # See also golang.org/x/build/cmd/genbootstrap, which is used 19 # to generate bootstrap tgz files for builders. 20 21 set -e 22 23 if [ "$GOOS" = "" -o "$GOARCH" = "" ]; then 24 echo "usage: GOOS=os GOARCH=arch ./bootstrap.bash [-force]" >&2 25 exit 2 26 fi 27 28 forceflag="" 29 if [ "$1" = "-force" ]; then 30 forceflag=-force 31 shift 32 fi 33 34 targ="../../go-${GOOS}-${GOARCH}-bootstrap" 35 if [ -e $targ ]; then 36 echo "$targ already exists; remove before continuing" 37 exit 2 38 fi 39 40 unset GOROOT 41 src=$(cd .. && pwd) 42 echo "#### Copying to $targ" 43 cp -Rp "$src" "$targ" 44 cd "$targ" 45 echo 46 echo "#### Cleaning $targ" 47 chmod -R +w . 48 rm -f .gitignore 49 if [ -e .git ]; then 50 git clean -f -d 51 fi 52 echo 53 echo "#### Building $targ" 54 echo 55 cd src 56 ./make.bash --no-banner $forceflag 57 gohostos="$(../bin/go env GOHOSTOS)" 58 gohostarch="$(../bin/go env GOHOSTARCH)" 59 goos="$(../bin/go env GOOS)" 60 goarch="$(../bin/go env GOARCH)" 61 62 # NOTE: Cannot invoke go command after this point. 63 # We're about to delete all but the cross-compiled binaries. 64 cd .. 65 if [ "$goos" = "$gohostos" -a "$goarch" = "$gohostarch" ]; then 66 # cross-compile for local system. nothing to copy. 67 # useful if you've bootstrapped yourself but want to 68 # prepare a clean toolchain for others. 69 true 70 else 71 rm -f bin/go_${goos}_${goarch}_exec 72 mv bin/*_*/* bin 73 rmdir bin/*_* 74 rm -rf "pkg/${gohostos}_${gohostarch}" "pkg/tool/${gohostos}_${gohostarch}" 75 fi 76 77 rm -rf pkg/bootstrap pkg/obj .git 78 79 echo ---- 80 echo Bootstrap toolchain for "$GOOS/$GOARCH" installed in "$(pwd)". 81 echo Building tbz. 82 cd .. 83 tar cf - "go-${GOOS}-${GOARCH}-bootstrap" | bzip2 -9 >"go-${GOOS}-${GOARCH}-bootstrap.tbz" 84 ls -l "$(pwd)/go-${GOOS}-${GOARCH}-bootstrap.tbz" 85 exit 0