#!/bin/bash
# Copyright 2012 The Go Authors. All rights reserved.
# Use of this source code is governed by a BSD-style
# license that can be found in the LICENSE file.

# support functions for go cross compilation

type setopt >/dev/null 2>&1 && setopt shwordsplit
PLATFORMS="darwin/386 darwin/amd64 openbsd/386 openbsd/amd64 netbsd/386 netbsd/amd64 dragonfly/386 dragonfly/amd64 freebsd/386 freebsd/amd64 freebsd/arm linux/386 linux/amd64 linux/arm windows/386 windows/amd64"

function go-alias {
	GOOS=${1%/*}
	GOARCH=${1#*/}
	eval "function go-${GOOS}-${GOARCH} { ( GOOS=${GOOS} GOARCH=${GOARCH} go \"\$@\" ) }"
}

function go-crosscompile-build {
	GOOS=${1%/*}
	GOARCH=${1#*/}
	cd $(go env GOROOT)/src ; GOOS=${GOOS} GOARCH=${GOARCH} ./make.bash --no-clean 2>&1
}

function go-crosscompile-build-all {
	FAILURES=""
	for PLATFORM in $PLATFORMS; do
		CMD="go-crosscompile-build ${PLATFORM}"
		echo "$CMD"
		$CMD || FAILURES="$FAILURES $PLATFORM"
	done
	if [ "$FAILURES" != "" ]; then
	    echo "*** go-crosscompile-build-all FAILED on $FAILURES ***"
	    return 1
	fi
}	

function go-all {
	FAILURES=""
	for PLATFORM in $PLATFORMS; do
		GOOS=${PLATFORM%/*}
		GOARCH=${PLATFORM#*/}
        GOARM=6
		CMD="go-${GOOS}-${GOARCH} $@"
		echo "$CMD"
		$CMD || FAILURES="$FAILURES $PLATFORM"
	done
	if [ "$FAILURES" != "" ]; then
	    echo "*** go-all FAILED on $FAILURES ***"
	    return 1
	fi
}

function go-build-all {
	FAILURES=""
	for PLATFORM in $PLATFORMS; do
		GOOS=${PLATFORM%/*}
		GOARCH=${PLATFORM#*/}
		SRCFILENAME=`echo $@ | sed 's/\.go//'` 
		CURDIRNAME=${PWD##*/}
		OUTPUT=${SRCFILENAME:-$CURDIRNAME} # if no src file given, use current dir name
		CMD="go-${GOOS}-${GOARCH} build -o ../prebuilt/$OUTPUT-${GOOS}-${GOARCH} $@"
		echo "$CMD"
		$CMD || FAILURES="$FAILURES $PLATFORM"
	done
	if [ "$FAILURES" != "" ]; then
	    echo "*** go-build-all FAILED on $FAILURES ***"
	    return 1
	fi
}

for PLATFORM in $PLATFORMS; do
	go-alias $PLATFORM
done

unset -f go-alias