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attune/packs/core/actions/echo.sh

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#!/bin/sh
# Echo Action - Core Pack
# Outputs a message to stdout
#
# This script uses pure POSIX shell without external dependencies like jq or yq.
# It reads parameters in DOTENV format from stdin until the delimiter.
set -e
# Initialize message variable
message=""
# Read DOTENV-formatted parameters from stdin until delimiter
while IFS= read -r line; do
# Check for parameter delimiter
case "$line" in
*"---ATTUNE_PARAMS_END---"*)
break
;;
message=*)
# Extract value after message=
message="${line#message=}"
# Remove quotes if present (both single and double)
case "$message" in
\"*\")
message="${message#\"}"
message="${message%\"}"
;;
\'*\')
message="${message#\'}"
message="${message%\'}"
;;
esac
;;
esac
done
# Echo the message (even if empty)
echo -n "$message"
# Exit successfully
exit 0