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ShellList/turn-amd64-to-all.sh

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+#!/bin/bash
+# A simple loongarch64 => loong64 .deb converter to help traverse the worlds.
+#
+# Mingcong Bai <jeffbai@aosc.io>, 2024
+
+_display_usage() {
+	printf "\
+Usage:
+
+	loong64-it [PACKAGE1] [PACKAGE2] ...
+
+        - PACKAGE{1..N}: Path to the old-world .deb package to convert.
+
+"
+}
+
+# Autobuild-like echo functions.
+abwarn() { echo -e "[\e[33mWARN\e[0m]:  \e[1m$*\e[0m"; }
+aberr()  { echo -e "[\e[31mERROR\e[0m]: \e[1m$*\e[0m"; exit 1; }
+abinfo() { echo -e "[\e[96mINFO\e[0m]:  \e[1m$*\e[0m"; }
+abdbg()  { echo -e "[\e[32mDEBUG\e[0m]: \e[1m$*\e[0m"; }
+
+_convert_loong64() {
+	PKG_PATH=$(realpath $1)
+ 	PKG_NAME=$(dpkg-deb -f "$PKG_PATH" Package)
+  	VERSION=$(dpkg-deb -f "$PKG_PATH" Version)
+  	BASEDIR=$(dirname $PKG_PATH)
+	abinfo "Examining package information: $1 ..."
+	dpkg -I "$PKG_PATH" || \
+		aberr "Invalid dpkg package: control (metadata) archive not found: $?"
+	CONTROL_EXT="$(ar t "$PKG_PATH" | grep control.tar* | cut -f3 -d'.')"
+	case "${CONTROL_EXT}" in
+		gz)
+			TAR_COMP_FLAG="z"
+			;;
+		xz)
+			TAR_COMP_FLAG="J"
+			;;
+		bz2)
+			TAR_COMP_FLAG="j"
+			;;
+		"")
+			TAR_COMP_FLAG=""
+			;;
+		*)
+			aberr "Invalid control archive extension ${CONTROL_EXT}!"
+			;;
+	esac
+
+	abinfo "Unpacking: $1 ..."
+	cd $(mktemp -d) || \
+		aberr "Failed to create temporary directory to unpack $1: $?."
+	DEBDIR="$(pwd)"
+	ar xv "$PKG_PATH" || \
+		aberr "Failed to unpack $1: $?."
+
+	abinfo "Unpacking metadata archive: $1 ..."
+	mkdir "$DEBDIR"/metadata || \
+		aberr "Failed to create temporary directory for extracting the metdata archive from $1: $?."
+	tar -C "$DEBDIR"/metadata -xvf control.tar."${CONTROL_EXT}" || \
+		aberr "Failed to unpack metadata archive from $1: $?."
+
+	abinfo "Converting dpkg Architecture key: $1 ..."
+	#if ! egrep '^Architecture: loongarch64$' "$DEBDIR"/metadata/control; then
+	#	aberr "Failed to detect a \"loongarch64\" architecture signature in control file - this is not a valid old-world LoongArch package!"
+	#fi
+	sed -e 's|^Architecture: amd64$|Architecture: all|g' \
+	    -i "$DEBDIR"/metadata/control
+	
+        
+
+
+	abinfo "Building metadata archive (control.tar.${CONTROL_EXT}): $1 ..."
+	cd "$DEBDIR"/metadata
+	tar cvf${TAR_COMP_FLAG} "$DEBDIR"/control.tar."${CONTROL_EXT}" * || \
+		aberr "Failed to build metadata archive (control.tar.${CONTROL_EXT}) for $1: $?."
+	cd "$DEBDIR"
+
+	abinfo "Rebuilding dpkg package $1"
+	ar rv "$PKG_PATH" control.tar.${CONTROL_EXT} || \
+		aberr "Failed to rebuild dpkg package $1: $?."
+
+        #abinfo "Cleaning up: $1 ..."
+        #rm -r "$DEBDIR"
+mv $1 ${BASEDIR}/${PKG_NAME}_${VERSION}_loong64.deb
+	abinfo """Your requested package:
+
+    $1
+    
+Has been successfully converted as a loong64 package and renamed as ${PKG_NAME}_${VERSION}_loong64.deb
+
+However, you may still need to install libLoL for old-world applications to
+work properly. Please refer to the libLoL home page:
+
+    https://liblol.aosc.io
+
+For details on how to install and configure libLoL.
+"""
+}
+
+# Display usage info if `-h' or `--help' is specified.
+if [[ "$1" == "-h" || "$1" == "--help" ]]; then
+	_display_usage
+	exit 0
+fi
+
+# Display usage info with directions if no option is specified.
+if [ -z "$1" ]; then
+	abwarn "Please specify package(s) to convert.\n"
+	_display_usage
+	exit 1
+fi
+
+# Record working directory.
+SRCDIR="$(pwd)"
+
+# Rebuilding all requested packages.
+for i in "$@"; do
+	_convert_loong64 $i
+done