fix(config): partial implementation of universal config detection (#68)

- Add multi-distribution config path detection
- Support /usr/local/etc/furt/environment (OpenBSD)
- Support /etc/furt/environment (Debian/Ubuntu/RHEL)
- Maintain .env support for development
- Add configurable Lua command via LUA_COMMAND environment variable

POSIX compatibility improvements:
- Replace command -v with [ -x ] for service user compatibility
- Change shebang from #!/bin/bash to #!/bin/sh for OpenBSD
- Replace ${BASH_SOURCE[0]} with $0 for POSIX shell compatibility

walter deployment changes:
- Migrate directory structure to /usr/local/furt/furt-lua/
- Set up _furt user permissions
- Configure system config in /usr/local/etc/furt/environment

Known issues:
- karl development environment regression (lua51 detection failed)
- walter SSL missing for SMTP (luasec vs luaossl compatibility)
- Config strategy needs comprehensive redesign for multi-implementation

Related: #68

Files modified:
- furt-lua/scripts/start.sh (POSIX compatibility + universal config)
- .env.example (added LUA_COMMAND and LUA_VERSION)
- walter: /usr/local/etc/furt/environment (system config setup)

.env.example

@@ -7,6 +7,10 @@ GITEA_TOKEN=your-gitea-token-here
 # Optional: Default-Assignee für Issues
 DEFAULT_ASSIGNEE=your-username
 
+# Lua-Konfiguration
+LUA_COMMAND=lua51
+LUA_VERSION=5.1
+
 # Gateway-Konfiguration (für Entwicklung)
 GATEWAY_PORT=8080
 GATEWAY_LOG_LEVEL=info

furt-lua/scripts/start.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 # furt-lua/scripts/start.sh
 # Start script for Furt Lua HTTP-Server
 
@@ -10,62 +10,72 @@ GREEN='\033[0;32m'
 YELLOW='\033[1;33m'
 NC='\033[0m' # No Color
 
-# Script directory
+# Script directory (POSIX-compatible)
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
 PROJECT_DIR="$(dirname "$SCRIPT_DIR")"
 
 echo -e "${GREEN}=== Furt Lua HTTP-Server Startup ===${NC}"
 
-# Check if Lua is installed
+# Check required dependencies
-if ! command -v lua &> /dev/null; then
+echo -e "${YELLOW}Checking dependencies...${NC}"
-    echo -e "${RED}Error: Lua is not installed${NC}"
+
-    echo "Install with: pacman -S lua (Arch) or apt install lua5.4 (Ubuntu)"
+# Load environment variables - Universal Config Detection
+echo -e "${YELLOW}Loading environment variables...${NC}"
+if [ -f "$PROJECT_DIR/.env" ]; then
+    echo -e "${GREEN}[OK]${NC} Loading from $PROJECT_DIR/.env"
+    export $(grep -v '^#' "$PROJECT_DIR/.env" | grep -v '^$' | xargs)
+elif [ -f "/usr/local/etc/furt/environment" ]; then
+    echo -e "${GREEN}[OK]${NC} Loading from /usr/local/etc/furt/environment"
+    export $(grep -v '^#' /usr/local/etc/furt/environment | grep -v '^$' | xargs)
+elif [ -f "/etc/furt/environment" ]; then
+    echo -e "${GREEN}[OK]${NC} Loading from /etc/furt/environment"
+    export $(grep -v '^#' /etc/furt/environment | grep -v '^$' | xargs)
+else
+    echo -e "${YELLOW}[WARN]${NC} No config file found in project root or system"
+fi
+
+# Setup Lua from config (after loading environment)
+LUA_CMD="${LUA_COMMAND:-lua51}"
+LUA_VER="${LUA_VERSION:-5.1}"
+
+# Check if configured Lua is installed (POSIX-compatible)
+if ! [ -x "$LUA_CMD" ]; then
+    echo -e "${RED}Error: $LUA_CMD is not installed${NC}"
+    echo "Install with: pkg_add lua51 (OpenBSD) or apt install lua5.1 (Ubuntu)"
     exit 1
 fi
 
 # Check Lua version
-LUA_VERSION=$(lua -v 2>&1 | head -n1)
+LUA_VERSION_OUTPUT=$($LUA_CMD -v 2>&1 | head -n1)
-echo -e "${YELLOW}Lua version:${NC} $LUA_VERSION"
+echo -e "${YELLOW}Lua command:${NC} $LUA_CMD ($LUA_VERSION_OUTPUT)"
-
-# Check required dependencies
-echo -e "${YELLOW}Checking dependencies...${NC}"
 
 # Test lua-socket
-lua -e "require('socket')" 2>/dev/null || {
+$LUA_CMD -e "require('socket')" 2>/dev/null || {
-    echo -e "${RED}Error: lua-socket not found${NC}"
+    echo -e "${RED}Error: lua-socket not found for $LUA_CMD${NC}"
-    echo "Install with: pacman -S lua-socket (Arch) or apt install lua-socket (Ubuntu)"
+    echo "Install with: pkg_add lua51-socket (OpenBSD) or apt install lua-socket (Ubuntu)"
     exit 1
 }
 echo -e "${GREEN}✓${NC} lua-socket found"
 
 # Test lua-cjson (system or luarocks)
-LUA_PATH="$HOME/.luarocks/share/lua/5.4/?.lua;;" \
+LUA_PATH="$HOME/.luarocks/share/lua/$LUA_VER/?.lua;;" \
-LUA_CPATH="$HOME/.luarocks/lib/lua/5.4/?.so;;" \
+LUA_CPATH="$HOME/.luarocks/lib/lua/$LUA_VER/?.so;;" \
-lua -e "require('cjson')" 2>/dev/null || {
+$LUA_CMD -e "require('cjson')" 2>/dev/null || {
-    echo -e "${RED}Error: lua-cjson not found${NC}"
+    echo -e "${RED}Error: lua-cjson not found for $LUA_CMD${NC}"
-    echo "Install with: pacman -S lua-cjson (Arch) or luarocks install --local lua-cjson"
+    echo "Install with: pkg_add lua51-cjson (OpenBSD) or luarocks install lua-cjson"
     exit 1
 }
 echo -e "${GREEN}✓${NC} lua-cjson found"
 
 # Test lua-ssl (optional for HTTPS)
-LUA_PATH="$HOME/.luarocks/share/lua/5.4/?.lua;;" \
+LUA_PATH="$HOME/.luarocks/share/lua/$LUA_VER/?.lua;;" \
-LUA_CPATH="$HOME/.luarocks/lib/lua/5.4/?.so;;" \
+LUA_CPATH="$HOME/.luarocks/lib/lua/$LUA_VER/?.so;;" \
-lua -e "require('ssl')" 2>/dev/null && {
+$LUA_CMD -e "require('ssl')" 2>/dev/null && {
     echo -e "${GREEN}✓${NC} lua-ssl found (HTTPS ready)"
 } || {
-    echo -e "${YELLOW}○${NC} lua-ssl not found (install with: luarocks install --local luaossl)"
+    echo -e "${YELLOW}○${NC} lua-ssl not found (install with: luarocks install luaossl)"
 }
 
-# Load environment variables from project root  
-echo -e "${YELLOW}Loading environment variables...${NC}"
-if [ -f "../.env" ]; then
-    echo -e "${GREEN}[OK]${NC} Loading from ../.env"
-    export $(grep -v '^#' ../.env | grep -v '^$' | xargs)
-else
-    echo -e "${YELLOW}[WARN]${NC} No .env file found in project root"
-fi
-
 # Check SMTP configuration (korrekte Variable-Namen)
 if [ -n "$SMTP_USERNAME" ] && [ -n "$SMTP_PASSWORD" ]; then
     echo -e "${GREEN}[OK]${NC} SMTP configured: $SMTP_USERNAME"
@@ -77,15 +87,15 @@ fi
 # Change to project directory
 cd "$PROJECT_DIR"
 
-# Add current directory and luarocks to Lua path for requires
+# Add current directory and luarocks to Lua path for requires (dynamic version)
-export LUA_PATH="$PROJECT_DIR/src/?.lua;$PROJECT_DIR/?.lua;$HOME/.luarocks/share/lua/5.4/?.lua;;"
+export LUA_PATH="$PROJECT_DIR/src/?.lua;$PROJECT_DIR/?.lua;$HOME/.luarocks/share/lua/$LUA_VER/?.lua;;"
-export LUA_CPATH="$HOME/.luarocks/lib/lua/5.4/?.so;;"
+export LUA_CPATH="$HOME/.luarocks/lib/lua/$LUA_VER/?.so;;"
 
 echo -e "${GREEN}Starting Furt HTTP-Server...${NC}"
 echo -e "${YELLOW}Project directory:${NC} $PROJECT_DIR"
-echo -e "${YELLOW}Lua paths configured for system + luarocks${NC}"
+echo -e "${YELLOW}Lua paths configured for $LUA_CMD (version $LUA_VER)${NC}"
 echo ""
 
 # Start server
-lua src/main.lua
+$LUA_CMD src/main.lua