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#!/bin/sh
# The checksums below must correspond to the downloads for this version.
GO_VERSION=go1.9.2
if [ $(uname -s) = "Darwin" ]; then
GO_PKG=${GO_VERSION}.darwin-amd64.tar.gz
GO_PKG_SHA=8b4f6ae6deae1150d2e341d02c247fd18a99af387516540eeb84702ffd76d3a1
elif [ $(uname -s) = "Linux" ]; then
GO_PKG=${GO_VERSION}.linux-amd64.tar.gz
GO_PKG_SHA=de874549d9a8d8d8062be05808509c09a88a248e77ec14eb77453530829ac02b
else
echo 1>&2 "I don't know how to install Go on your platform."
echo 1>&2 "Please install $GO_VERSION or later and add it to your PATH."
exit 1
fi
archivesum() {
shasum -a256 "$ARCHIVE"
}
archiveok() {
test -f "$ARCHIVE" && archivesum | grep -q $GO_PKG_SHA
}
if go version 2>/dev/null | grep -q $GO_VERSION; then
go version
exit 0
fi
ROOTDIR="$( cd "$( dirname "$0" )/.." && pwd )"
VENDORDIR="$ROOTDIR/vendor"
DOWNLOAD_URL=https://storage.googleapis.com/golang/$GO_PKG
ARCHIVE="$VENDORDIR/$GO_PKG"
INSTALLDIR="$VENDORDIR/$GO_VERSION"
export GOROOT="$INSTALLDIR/go"
INSTALLEDGO="$GOROOT/bin/go"
if [ -x $INSTALLEDGO ]; then
"$INSTALLEDGO" version
exit 0
fi
if ! archiveok; then
echo "Downloading $DOWNLOAD_URL"
mkdir -p "$VENDORDIR"
if ! curl -L -o "$ARCHIVE" $DOWNLOAD_URL; then
rm -f "$ARCHIVE"
echo 1>&2 "download failed"
fi
if ! archiveok; then
archivesum 1>&2
echo 1>&2 "expected checksum $GO_PKG_SHA"
exit 1
fi
fi
rm -rf "$INSTALLDIR"
mkdir -p "$INSTALLDIR"
tar xf "$ARCHIVE" -C "$INSTALLDIR"
"$INSTALLEDGO" version
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