"Global" module-aware install script for Go 1.11

aa_readme.md

Usage

./install.sh <pkg list>

Issues

• Specific to git (fixable)
• Does not support specification of a major import path (fixable)

Questions

• Does not use any sort of "cache" for the initial go get -d (which is in effect an import-aware repo clone); should it? Or should this always hit the network (or GOPROXY if set)?
• Whilst the import path would (when implemented) give us a major version if one were required, this script gives us the latest version within a major version - is this an desirable or an issue?
• Do we want to keep track of the installed versions of a command somewhere? Should this be query-able?

install.sh

#!/usr/bin/env bash

set -ue
set -o pipefail

pgb=$(go env GOBIN)
pgp=$(go env GOPATH)
pgpb=$(go env GOPATH | sed -e 's/:/\n/' | head -n 1)

tbin=$pgb
if [ "$tbin" == "" ]
then
	tbin="$pgp/bin"
fi

tgp=$(mktemp -d)
trap "rm -rf $tgp" EXIT

export GOPATH=$tgp
cd $tgp

export GO111MODULE=on

GO111MODULE=off go get -d "$@"

for i in "$@"
do
	pushd $(GO111MODULE=off go list -f "{{.Dir}}" $i) > /dev/null
	if [ "$(go env GOMOD)" == "" ]
	then
		pushd $(git rev-parse --show-toplevel) > /dev/null
		go mod init
		popd > /dev/null
	fi
	GOBIN="$tbin" GOPATH="$pgp" go install $i
	echo "Installed $i to $(GOBIN="$tbin" GOPATH="$pgp" go list -f '{{.Target}}')"
	popd > /dev/null
done