run-env

#!/bin/bash
#
# Groups commands that run in a specific Share Space environment.
# 
# After a sucessful install, these commands run in a shell
# with $PROJECT_ROOT set to install-time $GUEST_PROJECT_ROOT and 
# cwd == $PROJECT_ROOT.

quit() {
  echo $1
  exit 1
}

[ "$(whoami)" != "root" ] || quit "Don't run as root"

### Commands

stack-install() {
  ## Configuration variables

  # The repo containing the share space stack.
  PROJECT_REPO=${PROJECT_REPO:-"https://github.com/alexjball/share-space.git"}

  # Where to check out the repo. The stack itself determines its project root
  # based on the realpath of its install script. This will be accessible in 
  # $PROJECT_ROOT after a successful install.
  GUEST_PROJECT_ROOT=${GUEST_PROJECT_ROOT:-"$HOME/dev/share-space"}

  ## Source checkout

  echo "Installing project in $GUEST_PROJECT_ROOT"

  if [ -a $GUEST_PROJECT_ROOT/.git ]; then
    echo "Repo already cloned"
  else
    git clone --recurse-submodules $PROJECT_REPO $GUEST_PROJECT_ROOT || \
      quit "Couldn't check out project"
  fi

  ## Hand off to the stack repo

  $GUEST_PROJECT_ROOT/run stack-install
}

stack-build() {
  $PROJECT_ROOT/run stack-build
}

stack-up() {
  $PROJECT_ROOT/run stack-up
}

stack-down() {
  $PROJECT_ROOT/run stack-down
}

stack-status() {
  $PROJECT_ROOT/run stack-status
}

### Command Line Interface

join_by() {
  local d=$1; 
  shift; 
  echo -n "$1"; 
  shift; 
  printf "%s" "${@/#/$d}"
}

CMDS=(stack-install \
      stack-build \
      stack-up \
      stack-down \
      stack-status \
      help)

prog_name=$0
cmd=$1
shift || true

for option in ${CMDS[*]}; do
  if [ "$cmd" == "$option" ]; then
    $cmd $@
    exit
  fi
done

echo "Unrecognized command $cmd"
help
exit 1