generate-configs

#!/usr/bin/env nix-shell
#!nix-shell -i bash ../shell.nix

# Usage: generate-configs OUTPUT
#
# Generates configuration for all services found in BOTOCORE_PATH that
# are missing corresponding configurations in ./config/services.
#
# The example configurations will be written to individual files under
# OUTPUT/configs and OUTPUT/annexes.

set -euo pipefail

cd "$(dirname "${BASH_SOURCE[0]}")/.."

botocore="${BOTOCORE_PATH?}"
services="config/services"
output="${1?An OUTPUT argument is required}"
configs="$output/configs"
annexes="$output/annexes"

available=()
configured=()
unconfigured=0

# Output a message to stderr.
say() {
  echo >&2 "$@"
}

# Write an example configuration and annex to name.json.
write_config() {
  local -r name="$1"
  local -r config="$configs/$name.json"
  local -r annex="$annexes/$name.json"

  say "Missing $name"

  jq -n --arg name "$name" '{ libraryName: $name }' >"$config"
  jq -n --arg name "$name" '{}' >"$annex"
}

for path in "${botocore}"/*/; do
  model="${path%/}"
  model="${model##*/}"
  available+=("$model")
done

for path in "${services}"/*.json; do
  model="${path##*/}"
  model="${model%%.*}"
  configured+=("$model")
done

mkdir -p "$configs" "$annexes"

for name in $(comm -13 <(printf "%s\n" "${configured[@]}" | sort) <(printf "%s\n" "${available[@]}" | sort)); do
  unconfigured=$((unconfigured + 1))
  write_config "$name"
done

say "\
Missing $unconfigured service configurations.
Wrote examples to $configs and $annexes.
Found ${#available[@]} models in $botocore.
Found ${#configured[@]} service configurations in $services.
Done."