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#!/bin/bash
# ============================================================================
# syncconfig.sh - Generate auto.conf and autoconf.h from .config
# ============================================================================
#
# This is a lightweight alternative to kconfig's syncconfig for platforms
# where kconfig tools cannot be built (Windows, macOS CI, etc.).
#
# It reads a .config file and generates:
# - include/config/auto.conf (Makefile-includable CONFIG_* variables)
# - include/generated/autoconf.h (C header with #define CONFIG_*)
#
# Usage:
# syncconfig.sh <build-dir>
#
# ============================================================================
set -e
# Force C locale for consistent regex matching across all locales.
# Turkish locale (tr_TR) breaks [A-Za-z] character ranges in grep.
export LC_ALL=C
BUILD_DIR="${1:-.}"
CONFIG_FILE="${BUILD_DIR}/.config"
AUTO_CONF_DIR="${BUILD_DIR}/include/config"
AUTO_HEADER_DIR="${BUILD_DIR}/include/generated"
AUTO_CONF="${AUTO_CONF_DIR}/auto.conf"
AUTO_HEADER="${AUTO_HEADER_DIR}/autoconf.h"
if [ ! -f "$CONFIG_FILE" ]; then
echo "error: $CONFIG_FILE not found" >&2
exit 1
fi
# Create directories
mkdir -p "$AUTO_CONF_DIR"
mkdir -p "$AUTO_HEADER_DIR"
# ============================================================================
# Generate auto.conf
# ============================================================================
{
echo "# Automatically generated - do not edit"
echo "# $(date)"
echo ""
# Extract all CONFIG_*=value lines (skip comments and blank lines)
grep -E '^CONFIG_[A-Za-z0-9_]+=' "$CONFIG_FILE" || true
# Also extract non-CONFIG lines that are make variable assignments
grep -E '^[A-Z_]+[[:space:]]*:?=' "$CONFIG_FILE" | grep -v '^CONFIG_' || true
} > "$AUTO_CONF"
echo " GEN $AUTO_CONF"
# ============================================================================
# Generate autoconf.h
# ============================================================================
{
echo "/* Automatically generated - do not edit */"
echo "#ifndef __AUTOCONF_H__"
echo "#define __AUTOCONF_H__"
echo ""
while IFS= read -r line; do
# Skip comments and blank lines
case "$line" in
'#'*|'') continue ;;
esac
# Handle CONFIG_*=y -> #define CONFIG_* 1
if echo "$line" | grep -qE '^CONFIG_[A-Za-z0-9_]+=y$'; then
key=$(echo "$line" | cut -d= -f1)
echo "#define $key 1"
continue
fi
# Handle CONFIG_*=n -> /* CONFIG_* is not set */
if echo "$line" | grep -qE '^CONFIG_[A-Za-z0-9_]+=n$'; then
key=$(echo "$line" | cut -d= -f1)
echo "/* $key is not set */"
continue
fi
# Handle "# CONFIG_* is not set" -> /* CONFIG_* is not set */
if echo "$line" | grep -qE '^# CONFIG_[A-Za-z0-9_]+ is not set'; then
key=$(echo "$line" | sed 's/^# \(CONFIG_[A-Za-z0-9_]*\) is not set/\1/')
echo "/* $key is not set */"
continue
fi
# Handle CONFIG_*="string" -> #define CONFIG_* "string"
if echo "$line" | grep -qE '^CONFIG_[A-Za-z0-9_]+=".+"$'; then
key=$(echo "$line" | cut -d= -f1)
val=$(echo "$line" | cut -d= -f2-)
echo "#define $key $val"
continue
fi
# Handle CONFIG_*="" (empty string) -> #define CONFIG_* ""
if echo "$line" | grep -qE '^CONFIG_[A-Za-z0-9_]+=""$'; then
key=$(echo "$line" | cut -d= -f1)
echo "#define $key \"\""
continue
fi
# Handle CONFIG_*=number -> #define CONFIG_* number
if echo "$line" | grep -qE '^CONFIG_[A-Za-z0-9_]+=[0-9]+$'; then
key=$(echo "$line" | cut -d= -f1)
val=$(echo "$line" | cut -d= -f2-)
echo "#define $key $val"
continue
fi
done < "$CONFIG_FILE"
echo ""
echo "#endif /* __AUTOCONF_H__ */"
} > "$AUTO_HEADER"
echo " GEN $AUTO_HEADER"
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