generate_group_vars_sample.sh

#!/usr/bin/env bash

set -euo pipefail

basedir=$(dirname "$0")

for role in "$basedir"/roles/ceph-*; do
  rolename=$(basename "$role")
  if [[ $rolename == "ceph-common" ]]; then
      output="all.yml.sample"
  elif [[ $rolename == "ceph-agent" ]]; then
      output="agent.yml.sample"
  elif [[ $rolename == "ceph-fetch-keys" ]]; then
      output="ceph-fetch-keys.yml.sample"
  else
      output="${rolename:5}s.yml.sample"
  fi

  cat <<EOF > "$basedir"/group_vars/"$output"
---
# Variables here are applicable to all host groups NOT roles

# This sample file generated by $(basename "$0")

# Dummy variable to avoid error because ansible does not recognize the
# file as a good configuration file when no variable in it.
dummy:

EOF
  defaults="$role"/defaults/main.yml
  if [[ ! -f $defaults ]]; then
      continue
  fi

  if [ "$(uname)" == "Darwin" ]; then
  sed '/^---/d; s/^\([A-Za-z[:space:]]\)/#\1/' \
        "$defaults" >> "$basedir"/group_vars/"$output"
    echo >> "$basedir"/group_vars/"$output"
  elif [ "$(expr substr $(uname -s) 1 5)" == "Linux" ]; then
    sed '/^---/d; s/^\([A-Za-z[:space:]].\+\)/#\1/' \
        "$defaults" >> "$basedir"/group_vars/"$output"
    echo >> "$basedir"/group_vars/"$output"
  else
    echo "Unsupported platform"
    exit 1
  fi
done