v8.22

- DietPi-Imager | Move from 7z to xz for image compression and do not embed readme and hashes

.build/images/dietpi-imager

@@ -13,7 +13,7 @@
 	#   or use an existing .img file
 	#   or use Clonezilla to generate a bootable installer ISO from drive for x86_64 systems
 	# - Minimises root partition and filesystem
-	# - Hashes and 7z's the final image ready for release
+	# - Compresses the final image ready for release
 	#////////////////////////////////////
 
 	# Import DietPi-Globals ---------------------------------------------------------------
@@ -277,9 +277,7 @@
 	Main(){
 
 		# Dependencies
-		local p7zip='7zip' c7zz='7zz'
-		(( $G_DISTRO < 7 )) && p7zip='p7zip' c7zz='7zr'
-		G_AG_CHECK_INSTALL_PREREQ parted fdisk zerofree "$p7zip"
+		G_AG_CHECK_INSTALL_PREREQ parted fdisk zerofree xz-utils
 
 		# Skip menu if all inputs are provided via environment variables
 		if [[ ( $SOURCE_TYPE$FP_SOURCE == 'Drive'?* || $SOURCE_TYPE$FP_SOURCE_IMG == 'Image'?* ) && $FP_ROOT_DEV && $CLONING_TOOL =~ ^(dd|Clonezilla)$ && $OUTPUT_IMG_NAME ]]
@@ -513,13 +511,13 @@
 			# Rename if source image != output image yet
 			[[ $(readlink -f "$PWD/$OUTPUT_IMG_NAME.$OUTPUT_IMG_EXT") != "$(readlink -f "$FP_SOURCE_IMG")" ]] && G_EXEC mv "$FP_SOURCE_IMG" "$OUTPUT_IMG_NAME.$OUTPUT_IMG_EXT"
 
-			# Check for sufficient free disk space to store the 7z archive with 100 MiB buffer
+			# Check for sufficient free disk space to store the xz archive with 100 MiB buffer
 			G_CHECK_FREESPACE . $(( $IMAGE_SIZE * 15/100 / 1024**2 + 100 )) || exit 1
 
 		# Drive source and dd target
 		elif [[ $CLONING_TOOL == 'dd' ]]
 		then
-			# Check for sufficient free disk space to store the image and the 7z archive with 100 MiB buffer
+			# Check for sufficient free disk space to store the image and the xz archive with 100 MiB buffer
 			G_CHECK_FREESPACE . $(( $IMAGE_SIZE * 115/100 / 1024**2 + 100 )) || exit 1
 
 			G_DIETPI-NOTIFY 2 "Creating final image with actually used size: $(( $IMAGE_SIZE / 1024**2 + 1 )) MiB"
@@ -661,34 +659,21 @@ _EOF_
 		# Exit now when archive shall be skipped
 		(( $SKIP_ARCHIVE )) && exit 0
 
-		# Generate hashes: MD5, SHA1, SHA256
-		G_DIETPI-NOTIFY 2 'Generating hashes to pack with image, please wait...'
-		cat << _EOF_ > hash.txt
-FILE:   $OUTPUT_IMG_NAME.$OUTPUT_IMG_EXT
-DATE:   $(date)
-MD5:    $(md5sum "$OUTPUT_IMG_NAME.$OUTPUT_IMG_EXT" | mawk '{print $1}')
-SHA1:   $(sha1sum "$OUTPUT_IMG_NAME.$OUTPUT_IMG_EXT" | mawk '{print $1}')
-SHA256: $(sha256sum "$OUTPUT_IMG_NAME.$OUTPUT_IMG_EXT" | mawk '{print $1}')
-_EOF_
-		# Download current README
-		G_EXEC_DESC='Downloading current README.md to pack with image...' G_EXEC curl -sSf "$DIETPI_REPO/README.md" -o README.md
-
-		# Generate 7z archive
+		# Generate xz archive
 		# NB: LZMA2 ultra compression requires much memory per thread. 1 GiB is not sufficient for >2 threads, hence use "-mmt2" to limit used CPU threads to "2" on 1 GiB devices with more than two cores.
 		local limit_threads=()
-		(( $(free -m | mawk '/Mem:/{print $2}') < 1750 && $(nproc) > 2 )) && limit_threads=('-mmt2')
-		[[ -f $OUTPUT_IMG_NAME.7z ]] && G_EXEC rm "$OUTPUT_IMG_NAME.7z"
+		(( $(free -m | mawk '/Mem:/{print $2}') < 1750 && $(nproc) > 2 )) && limit_threads=('-T2')
+		[[ -f $OUTPUT_IMG_NAME.$OUTPUT_IMG_EXT.xz ]] && G_EXEC rm "$OUTPUT_IMG_NAME.$OUTPUT_IMG_EXT.xz"
 		[[ ( -t 0 || -t 1 ) && $TERM != 'dumb' ]] && G_EXEC_OUTPUT=1
 		# Add "-bsp1 -bso1 -bse2" to print output to regular STDOUT and STDERR, else the pipe to "tee" makes it omit at least the progress output.
-		G_EXEC_DESC='Creating final 7zip archive' G_EXEC "$c7zz" a -mx=9 "${limit_threads[@]}" "$OUTPUT_IMG_NAME.7z" "$OUTPUT_IMG_NAME.$OUTPUT_IMG_EXT" hash.txt README.md
+		G_EXEC_DESC='Creating final xz archive' G_EXEC xz -9e "${limit_threads[@]}" "$OUTPUT_IMG_NAME.$OUTPUT_IMG_EXT"
 
-		G_EXEC_NOHALT=1 G_EXEC rm hash.txt README.md
 		G_DIETPI-NOTIFY 0 "DietPi-Imager has successfully finished.
 Final image file: $PWD/$OUTPUT_IMG_NAME.$OUTPUT_IMG_EXT
-Final 7z archive: $PWD/$OUTPUT_IMG_NAME.7z"
+Final xz archive: $PWD/$OUTPUT_IMG_NAME.$OUTPUT_IMG_EXT.xz"
 
 		# Upload archive automatically if there is an upload.sh in the same directory
-		[[ -x 'upload.sh' ]] && G_EXEC_OUTPUT=1 G_EXEC ./upload.sh "$OUTPUT_IMG_NAME.7z" && G_EXEC rm -R "$OUTPUT_IMG_NAME.7z"
+		[[ -x 'upload.sh' ]] && G_EXEC_OUTPUT=1 G_EXEC ./upload.sh "$OUTPUT_IMG_NAME.$OUTPUT_IMG_EXT.xz" && G_EXEC rm -R "$OUTPUT_IMG_NAME.$OUTPUT_IMG_EXT.xz"
 
 	}