rebuild and compare all Go targets

buildall

#!/bin/bash

# Usage: buildall [-e] [-cmp] [-work]
#
# Builds everything (std) for every GOOS/GOARCH combination but installs nothing.
#
# By default, runs the builds with -toolexec 'toolstash -cmp', to test that the
# toolchain is producing bit identical output to a previous known good toolchain.
#
# Options:
#	-e: stop at first failure
#	-cmp: use toolstash -cmp; just check that ordinary builds succeed
#	-work: pass -work to go command

TARG=${buildtarg:-std}
sete=false
if [ "$1" = "-e" ]; then
	sete=true
	shift
fi

cmp=false
if [ "$1" = "-cmp" ]; then
	cmp=true
	shift
fi

work=""
if [ "$1" = "-work" ]; then
	work="-work"
	shift
fi

cd $(go env GOROOT)/src
go install cmd/{5,6,8,9}{g,l} cmd/old{5,6,8,9}a cmd/asm || exit 1
pattern="$1"
if [ "$pattern" = "" ]; then
	pattern=.
fi

# put linux, nacl first in the target list to get all the architectures up front.
targets="$((ls runtime | 9 sed -n 's/^rt0_(.*)_(.*)\.s/\1-\2/p'; echo linux-386-387) | sort | egrep -v android-arm | egrep "$pattern" | egrep 'linux|nacl')
	$(ls runtime | 9 sed -n 's/^rt0_(.*)_(.*)\.s/\1-\2/p' | egrep -v 'android-arm|darwin-arm' | egrep "$pattern" | egrep -v 'linux|nacl')"
if [ "$sete" = true ]; then
	set -e
fi
for target in $targets
do
	echo $target
	export GOOS=$(echo $target | sed 's/-.*//')
	export GOARCH=$(echo $target | sed 's/.*-//')
	unset GO386
	if [ "$GOARCH" = "387" ]; then
		export GOARCH=386
		export GO386=387
	fi
	if $cmp; then
		go build $work -a -toolexec 'toolstash -cmp' $TARG
	else
		go build $work -a $TARG
	fi
done