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Text file src/bootstrap.bash

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     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 $GOROOT_BOOTSTRAP to bootstrap a local build.
    14	#
    15	# Only changes that have been committed to Git (at least locally,
    16	# not necessary reviewed and submitted to master) are included in the tree.
    17	
    18	set -e
    19	
    20	if [ "$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

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