#!/bin/bash
# Script to read a specific key from the build configuration file.
KEY_TO_READ=""
# Parse command line arguments
while [[ "$#" -gt 0 ]]; do
case $1 in
--key)
if [[ -z "$2" ]]; then
echo "Error: Argument for --key is missing" >&2
exit 1
fi
KEY_TO_READ="$2"
shift # past argument
shift # past value
;;
-*|--*)
echo "Unknown option $1" >&2
exit 1
;;
*)
# Ignore positional arguments if any, or handle them if needed
shift
;;
esac
done
# Check if the key was provided
if [[ -z "$KEY_TO_READ" ]]; then
echo "Usage: $0 --key <config_key>" >&2
exit 1
fi
SCRIPT_DIR=$(dirname "$0")
# Resolve the absolute path to the build config file relative to the script's location
BUILD_CFG_PATH=$(realpath "${SCRIPT_DIR}/../build.cfg")
# Check if the config file exists
if [[ ! -f "$BUILD_CFG_PATH" ]]; then
echo "Error: Build config file not found at ${BUILD_CFG_PATH}" >&2
exit 1
fi
# Read the value for the given key
# Use grep to find the line starting with the key, followed by optional spaces, '=', optional spaces
# Use cut to get the value after the first '=' (handles potential '=' in the value)
# Use sed to remove leading/trailing whitespace
VALUE=$(grep -m 1 "^${KEY_TO_READ}[[:space:]]*=[[:space:]]*" "${BUILD_CFG_PATH}" | cut -d'=' -f2- | sed 's/^[[:space:]]*//;s/[[:space:]]*$//')
# Check if the value was found
if [[ -z "$VALUE" ]]; then
# Check if the key line exists but has no value after '='
if grep -q "^${KEY_TO_READ}[[:space:]]*=[[:space:]]*$" "${BUILD_CFG_PATH}"; then
# Key exists but value is empty, print nothing and exit successfully
echo ""
exit 0
else
# Key does not exist in the file
echo "Error: Key '${KEY_TO_READ}' not found in ${BUILD_CFG_PATH}" >&2
exit 1
fi
fi
# Print the value
echo "$VALUE"
exit 0
