github.com/sean-/go@v0.0.0-20151219100004-97f854cd7bb6/src/bootstrap.bash (about)

     1  #!/bin/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 $GOROOT_BOOTSTRAP to bootstrap a local build.
    14  #
    15  # Only changes that have been committed to Git (at least locally,
    16  # not necessary reviewed and submitted to master) are included in the tree.
    17  
    18  set -e
    19  
    20  if [ "$GOOS" = "" -o "$GOARCH" = "" ]; then
    21  	echo "usage: GOOS=os GOARCH=arch ./bootstrap.bash" >&2
    22  	exit 2
    23  fi
    24  
    25  targ="../../go-${GOOS}-${GOARCH}-bootstrap"
    26  if [ -e $targ ]; then
    27  	echo "$targ already exists; remove before continuing"
    28  	exit 2
    29  fi
    30  
    31  unset GOROOT
    32  src=$(cd .. && pwd)
    33  echo "#### Copying to $targ"
    34  cp -R "$src" "$targ"
    35  cd "$targ"
    36  echo
    37  echo "#### Cleaning $targ"
    38  rm -f .gitignore
    39  if [ -e .git ]; then
    40  	git clean -f -d
    41  fi
    42  echo
    43  echo "#### Building $targ"
    44  echo
    45  cd src
    46  ./make.bash --no-banner
    47  gohostos="$(../bin/go env GOHOSTOS)"
    48  gohostarch="$(../bin/go env GOHOSTARCH)"
    49  goos="$(../bin/go env GOOS)"
    50  goarch="$(../bin/go env GOARCH)"
    51  
    52  # NOTE: Cannot invoke go command after this point.
    53  # We're about to delete all but the cross-compiled binaries.
    54  cd ..
    55  if [ "$goos" = "$gohostos" -a "$goarch" = "$gohostarch" ]; then
    56  	# cross-compile for local system. nothing to copy.
    57  	# useful if you've bootstrapped yourself but want to
    58  	# prepare a clean toolchain for others.
    59  	true
    60  else
    61  	mv bin/*_*/* bin
    62  	rmdir bin/*_*
    63  	rm -rf "pkg/${gohostos}_${gohostarch}" "pkg/tool/${gohostos}_${gohostarch}"
    64  fi
    65  rm -rf pkg/bootstrap pkg/obj .git
    66  
    67  echo ----
    68  echo Bootstrap toolchain for "$GOOS/$GOARCH" installed in "$(pwd)".
    69  echo Building tbz.
    70  cd ..
    71  tar cf - "go-${GOOS}-${GOARCH}-bootstrap" | bzip2 -9 >"go-${GOOS}-${GOARCH}-bootstrap.tbz"
    72  ls -l "$(pwd)/go-${GOOS}-${GOARCH}-bootstrap.tbz"
    73  exit 0