GDM wrapper for not mucking with shared $GOPATH

gdm.sh

#!/bin/bash
self_path="$(readlink -f "$0")"
self_dir="${self_path%/*}"

#unset PWD # screws with go package path detection

IFS=$'\n' read -d '' -a gdms < <(which -a gdm)
realgdm=
foundself=
for gdm in "${gdms[@]}"; do
	if [[ -n "$foundself" ]]; then
		realgdm="$gdm"
		break
	fi
  if [[ "$(readlink -f "$gdm")" == "$self_path" ]]; then
		foundself=1
	fi
done
if [[ -z "$realgdm" ]]; then
  echo "gdm not found" >&2
  exit 1
fi

projdir=$PWD
while [[ ! -e $projdir/Godeps ]] && [[ "$projdir" != "" ]]; do
  projdir=${projdir%/*}
done
if [[ "$projdir" == "" ]]; then
  projdir=$PWD
fi

import_path=$(cd $projdir && go list -f '{{.ImportPath}}' .)
mkdir -p "$projdir/.go/src/${import_path%/*}"
ln -sf "$projdir" "$projdir/.go/src/${import_path}"

twd=/tmp/.gdm_$$
ln -sf "$projdir/.go" $twd
trap "rm -f $twd" EXIT
GOPATH="$twd:$GOPATH"
cd "$twd/src/$import_path/${PWD#$projdir}"

if [[ "$1" == exec ]]; then
  shift
  "$@"
  exit $?
fi

$realgdm "$@"