Merge pull request #9 from Antynea/Development

enhanced

41_snapshots-btrfs

@@ -1,79 +1,112 @@
-#! /bin/sh
+#! /usr/bin/bash
+#
+#
+#########################################################################################################################################
+# Written by: Antynea															#
+#																	#
+# Purpose: Include btrfs snapshots at boot options.											#
+#																	#
+# What this script does:														#
+# - List snapshots existing on root partition (btrfs).											#
+# - Create corresponding menuentry in grub.cfg , which ensures a very easy rollback.							#
+#																	#
+# How to use it:															#
+# - Add this lines to /etc/default/grub:												#
+#																	#
+# * GRUB_BTRFS_SUBMENUNAME="ArchLinux Snapshots" 					(Name menu appearing in grub.)	 		#
+# * GRUB_BTRFS_PREFIXENTRY="Snapshot"        		   				(Add a name ahead your snapshots entries.)	#
+# * GRUB_BTRFS_NKERNEL=("vmlinuz-linux") 		 				(Custom Name kernel you use it.) 		#
+# * GRUB_BTRFS_NINIT=("initramfs-linux.img" "initramfs-linux-fallback.img")		(Custom Name initramfs (ramdisk) you use it.)	#
+# * GRUB_BTRFS_INTEL_UCODE=("intel-ucode.img") 						(Custom Name intel microcode you use it.)	#
+#																	#
+# - Generate grub.cfg (on Archlinux use grub-mkconfig -o /boot/grub/grub.cfg )								#
+#																	#
+# - grub-btrfs automatically generates snapshots entries.										#
+# - You will see it appear different entries, e.g : Prefixentry name of snapshot [2013-02-11 04:00:00]					#
+#																	#
+# Warning:																#
+# This version detect kernels,initramfs,intel microcode only in boot partition, not in snapshot.					#
+# If those that are present in boot partition but not in snapshot,								   	#
+# entry will be created but not fonctional, you don't boot it.										#
+#																	#
+#########################################################################################################################################
 set -e
 
 . /usr/share/grub/grub-mkconfig_lib
 . /etc/default/grub
 
-### variables modifiable ###
-## fr: nom du sous-menu 
-## en: Name of the submenu
-submenuname="ArchLinux Snapshots"
-## fr: préfixe de l'entrée 
-## en: Prefix entry
-prefixentry="Snapshot"
-## fr: nom(s) du ou des kernel(s)
-## en: Name(s) of the kernel(s)
-nkernel=("vmlinuz-linux")
-## fr: nom(s) de(s) l'init
-## en: Name(s) of the init(s)
-ninit=("initramfs-linux.img" "initramfs-linux-fallback.img")
+######################################
+### variables in /etc/default/grub ###
+######################################
+## Submenu name
+submenuname=${GRUB_BTRFS_SUBMENUNAME:-"ArchLinux Snapshots"}
+## Prefix entry
+prefixentry=${GRUB_BTRFS_PREFIXENTRY:-"Snapshot"}
+## Kernel(s) name(s)
+nkernel=("${GRUB_BTRFS_NKERNEL[@]:-vmlinuz-linux}")
+## Initramfs name(s)
+ninit=("${GRUB_BTRFS_NINIT[@]:-initramfs-linux.img initramfs-linux-fallback.img}")
+## Intel-ucode name(s)
+intel_ucode=("${GRUB_BTRFS_INTEL_UCODE[@]:-intel-ucode.img}")
 
-
-###########################
-### fr: DÉBUT DU SCRIPT ###
-### en: NAME OF SCRIPT  ###
-### fr: NE PAS TOUCHER  ###
-### en: DO NOT TOUCH    ###
-###########################
-## fr: paramêtre des chaînes --hint
-## en: Parameter of the chains --hint (Translation unclear)
+########################
+### variables script ###
+########################
+## Internationalization (default : english)
+export TEXTDOMAIN=grub-btrfs-git
+export TEXTDOMAINDIR="/usr/share/locale"
+## hints string
 pboot=$(${grub_probe} --target="hints_string" "/boot" 2>/dev/null)
-## fr: uuid de la partition root
-## en: UUID of the root partition
+## UUID of the root partition
 uuid=$(${grub_probe} "/" --target="fs_uuid" 2>/dev/null)
-## fr: uuid de la partition boot
-## en: UUID of the boot partition
+## UUID of the boot partition
 buuid=$(${grub_probe} --target="fs_uuid" "/boot" 2>/dev/null)
-## fr: paramêtre passé au kernel
-## en: Parameters passed to the kernel
+## Parameters passed to the kernel
 params="$GRUB_CMDLINE_LINUX $GRUB_CMDLINE_LINUX_DEFAULT"
 
+##############
+### Script ###
+##############
 
-# fr: on affiche le menu
-# en: Display the menu
+typeset -A date_time
+unset snapshots
+
+# Create list of filesystem snapshots
+oldIFS=$IFS
+IFS=$'\n'
+
+for snap in $($bindir/btrfs subvolume list -sa / --sort=-ogen | $bindir/awk '{gsub(/^.*<FS_TREE>\//,"",$NF);print $11" "$12"?"$NF}'); do
+        snap_name="${snap#*"?"}"
+        # Discard deleted snapshots
+        if [ $snap_name = "DELETED" ]; then continue; fi
+        snapshots+=("$snap_name")
+        date_time[$snap_name]="${snap%"?"*}"
+done
+IFS=$oldIFS
+
+# Display the menu
 echo "submenu '$submenuname' {"
 
-# fr: on traite la variable kernel
-# en: Treat the kernel variables (Translation unclear)
+# Treat the kernel variables (Translation unclear)
 for kernel in ${nkernel[@]}; do
-	# fr: on test si le(s) nom(s) du(des) kernel existe(nt), autrement on affiche une erreur et on sort
-	# en: Check the specified kernel(s) exist, if it/they don't display an error and exit
-	if [ ! -f /boot/$kernel ]; then echo "/boot/$kernel: fr: Fichier inexistant en: File does not exist" >&2; exit 1; fi
-	# fr: on vérifie le nombre de kernel présent, si >1 on crée un menu
-	# en: If there are >1 kernels, create a menu
+	# Check the specified kernel(s) exist, if it/they don't, display an error and exit
+	if [ ! -f /boot/$kernel ]; then gettext_printf $"Error: /boot/$kernel, kernel does not exist" >&2; exit 1; fi
+	# If there are >1 kernels, create a menu
 	if [ ${#nkernel[*]} != 1 ]; then echo "	submenu '$kernel' {
 		submenu '---> Kernel: $kernel <---' { echo }"; fi
-	
-	# fr: On liste les snapshots présent sur le système de fichier
-	# en: List filesystem snapshots
-	for item in $($bindir/btrfs subvolume list -s / --sort=-ogen | $bindir/awk '{print $NF}'); do
-		# fr: On écarte les snapshots avec un statut de suppression
-		# en: Discard deleted snapshots
-		if [ $item = "DELETED" ]; then continue; fi
-		# fr: on crée un menu pour chaque snapshot présent
-		# en: Create a menu for remaining snapshots
-		echo "		submenu '$prefixentry $item' {"
-		# fr: si plusieurs kernel on été trouvé, on affiche un titre indicatif
-		# en: Display message if more than one kernel is found
+	# Treat the snapshots variable
+	for item in ${snapshots[@]}; do
+		# Output name of snapshot
+		gettext_printf $"Found Snapshot: %s\n" "$item ${date_time[$item]}" >&2
+		# Create a menu for remaining snapshots (name + creation date)
+		echo "		submenu '$prefixentry $item [${date_time[$item]}]' {"
+		# if more than one kernel is found, create a menu
 		if [ ${#nkernel[*]} != 1 ]; then echo "			submenu '---> Kernel: $kernel <---' { echo }"; fi
-		# fr: on traite la variable de l'initframs
-		# en: Treat the initramfs variables (Translation unclear)
+		# Treat the initramfs variable
 		for init in ${ninit[@]}; do
-			# fr: on test si le(s) nom(s) du(des) initframs existe(nt), autrement on affiche une erreur et on sort
-			# en: Check the specified initramfs(es) exist, if it/they don't display an error and exit
-			if [ ! -f /boot/$init ]; then echo "/boot/$init: Fichier inexistant" >&2; exit 1; fi
-			# fr: on traite chaque entrée des snapshots avec leurs kernel et initframs respectifs
-			# en: Specify a kernel and initramfs for every snapshot
+			# Check the specified initramfs(es) exist, if it/they don't, display an error and exit
+			if [ ! -f /boot/$init ]; then gettext_printf $"Error: /boot/$init, initramfs does not exist" >&2; exit 1; fi
+			# Specify a kernel and initramfs for every snapshot
 			echo "\
 			menuentry '$item $init' --class arch --class gnu-linux --class gnu --class os "\$menuentry_id_option" 'gnulinux-snapshots-$uuid'{
 				load_video
@@ -84,26 +117,38 @@ for kernel in ${nkernel[@]}; do
 					search --no-floppy --fs-uuid --set=root $buuid
 				fi
 				echo	'Loading Linux snapshot ...'"
-				# fr: on vérifie l'emplacement de la partition /boot
-				# en: Check the location of the /boot partition
+				# Check the location of the /boot partition
 				if [ $uuid = $buuid ]; then
 					echo "\
 				linux	/$item/boot/$kernel root=UUID=$uuid rw rootflags=subvol=$item $params
-				echo    'Loading initial ramdisk ...'
+				echo    'Loading initial ramdisk ...'"
+				# Check intel microcode exist
+					if [ -f /boot/$intel_ucode ]; then
+						echo "\
+				initrd	/$item/boot/$intel_ucode /$item/boot/$init"
+					else
+						echo "\
 				initrd	/$item/boot/$init"
+					fi
 				else
 					echo "\
 				linux	/$kernel root=UUID=$uuid rw rootflags=subvol=$item $params
-				echo    'Loading initial ramdisk ...'
+				echo    'Loading initial ramdisk ...'"
+				# Check intel microcode exist
+				if [ -f /boot/$intel_ucode ]; then
+						echo "\
+				initrd	/$intel_ucode /$init"
+					else
+						echo "\
 				initrd  /$init"
+					fi
 				fi
 				echo "\
 			}"
 		done
 		echo "		}"
 	done
-	# fr: on oubli pas de fermer le menu si plusieurs kernels ont été trouvé
-	# en: Don't forget to close menus if more than one kernel is found
+	# Don't forget to close menus if more than one kernel is found
 	if [ ${#nkernel[*]} != 1 ]; then echo "	}"; fi
 done
 echo "}"

README.md

@@ -1,4 +1,41 @@
-grub-btrfs
-==========
+### grub-btrfs
+
+
+This is a version 0.xx of grub-btrfs
+
+#### Description
 
 grub-btrfs, add support for btrfs snapshots into grub menu
+
+#### What does grub-btrfs v0.xx do :
+
+Simple rollback using snapshots you made previous.
+
+Makes a list of all snapshots, kernels, initramfs present on the filesystem and then creates a corresponding entered with name and date of snapshots in grub.cfg, which ensures a very easy rollback.
+
+#### How to use it :
+
+1. Add lines to /etc/default/grub as needed, defaults listed as examples:
+2. 
+	* submenuname = name menu appear in grub ( e.g: GRUB_BTRFS_SUBMENUNAME="ArchLinux Snapshots" )
+
+	* prefixentry = add a name ahead your snapshots entries ( e.g: GRUB_BTRFS_PREFIXENTRY="Snapshot" )
+
+	* nkernel= name kernel you use it ( e.g: GRUB_BTRFS_NKERNEL=("vmlinuz-linux") )
+
+	* ninit= name initramfs (ramdisk) you use it ( e.g: GRUB_BTRFS_NINIT=("initramfs-linux.img" "initramfs-linux-fallback.img") )
+
+	* intel_ucode= name intel microcode you use it ( e.g: GRUB_BTRFS_INTEL_UCODE=("intel-ucode.img") )
+
+2. Generate grub.cfg (on Archlinux is grub-mkconfig -o /boot/grub/grub.cfg )
+
+grub-btrfs automatically generates snapshots entries.
+
+You will see it appear different entries, e.g : Prefixentry name of snapshot [2013-02-11 04:00:00]
+
+#### Warning
+
+Version 0.xx detect kernels,initramfs,intel microcode only in boot partition, not in snapshot.
+If kernels,initramfs,intel microcode, are present in boot partition but not in snapshot, entry will be created but not fonctional, you don't boot it.
+
+Version 1.xx will do it, release soon.