Text file src/bootstrap.bash

     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
    86  

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