added script to backup and restore packages

openwrt/packages/opkgscript.sh

@@ -0,0 +1,206 @@
+#! /bin/sh
+
+# Write a list of packages currently installed or read that list,
+# presumably after a firmware upgrade, in order to reinstall all packages
+# on that list not currently installed
+#
+# (c) 2013 Malte Forkel <malte.forkel@berlin.de>
+#
+# Originally found on OpenWrt forums at:
+#    https://forum.openwrt.org/viewtopic.php?pid=194478#p194478
+# Thanks, too, to hnyman for important comments on this script
+#
+# Version history
+#    0.2.2 - editorial tweaks to help text -richb-hanvover
+#    0.2.1 - fixed typo in awk script for dependency detection
+#    0.2.0 - command interface
+#    0.1.0 - Initial release
+
+PCKGLIST=/etc/config/opkg.installed  # default package list
+SCRIPTNAME=$(basename $0)            # name of this script
+COMMAND=""                           # command to execute
+
+INSTLIST=$(mktemp)                   # list of packages to install
+PREQLIST=$(mktemp)                   # list of prerequisite packages
+
+UPDATE=false                         # update the package database
+OPKGOPT=""                           # options for opkg calls
+VERBOSE=false                        # be verbose
+
+cleanup () {
+    rm -f $INSTLIST $PREQLIST
+}
+
+echo_usage () {
+    echo \
+"Usage: $(basename $0) [options...] command [packagelist]
+
+Available commands:
+    help                print this help text
+    write               write a list of currently installed packages
+    install             install packages on list not currently installed
+    script              output a script to install missing packages
+
+Options:
+    -u                  update the package database
+    -t                  test only, execute opkg commands with --noaction
+    -v                  be verbose
+
+$SCRIPTNAME can be used to re-install those packages that were installed
+before a firmware upgrade but are not part of the new firmware image.
+
+Before the firmware upgrade, execute
+
+    $SCRIPTNAME [options...] write [packagelist]
+
+to save the list of currently installed packages. Save the package list in a
+place that will not be wiped out by the firmware upgrade. The default package list
+is '$PCKGLIST', which works well for normal sysupgrades. Or copy that file to
+another computer before the upgrade if you are not preserving the settings.
+
+After the firmware upgrade, execute
+
+    $SCRIPTNAME [options...] install [packagelist]
+
+to re-install all packages that were not part of the firmware image.
+By default, the script will use the previously-created '$PCKGLIST'.
+Alternatively, you can execute
+
+    $SCRIPTNAME [options...] script [packagelist]
+
+to output a shell script that will contain calls to opkg to install those
+missing packages. This might be useful if you want to check which packages
+would be installed of if you want to edit that list.
+
+In order for this script to work after a firmware upgrade or reboot, the
+opkg database must have been updated. You can use the option -u to do this.
+
+You can specify the option -t to test what $SCRIPTNAME would do. All calls
+to opkg will be made with the option --noaction. This does not influence
+the call to opkg to write the list of installed packages, though.
+"
+}
+
+trap cleanup SIGHUP SIGINT SIGTERM EXIT
+
+# parse command line options
+while getopts "htuvw" OPTS; do
+    case $OPTS in
+        t )
+            OPKGOPT="$OPKGOPT --noaction";;
+        u )
+            UPDATE=true;;
+        v )
+            VERBOSE=true;;
+        [h\?*] )
+            echo_usage
+            exit 0;;
+    esac
+done
+shift $(($OPTIND - 1))
+
+# Set the command
+COMMAND=$1
+
+# Set name of the package list
+if [ "x$2" != "x" ]; then
+    PCKGLIST="$2"
+fi
+
+#
+# Help
+#
+
+if [ "x$COMMAND" == "x" ]; then
+    echo "No command specified."
+    echo ""
+    COMMAND="help"
+fi
+
+if [ $COMMAND == "help" ]; then
+    echo_usage
+    exit 0
+fi
+
+#
+# Write
+#
+
+if [ $COMMAND = "write" ] ; then
+    if $VERBOSE; then
+        echo "Saving package list to $PCKGLIST"
+    fi
+    # NOTE: option --noaction not valid for list-installed
+    opkg list-installed > "$PCKGLIST"
+    exit 0
+fi
+
+#
+# Update
+#
+
+if $UPDATE; then
+    opkg $OPKGOPT update
+fi
+
+#
+# Check
+#
+
+if [ $COMMAND == "install" ] || [ $COMMAND == "script" ]; then
+    # detect uninstalled packages
+    if $VERBOSE && [ $COMMAND != "script" ]; then
+        echo "Checking packages... "
+    fi
+    cat "$PCKGLIST" | while read PACKAGE SEP VERSION; do
+        # opkg status is much faster than opkg info
+        # it only returns status of installed packages
+        #if ! opkg status $PACKAGE | grep -q "^Status:.* installed"; then
+        if [ "x$(opkg status $PACKAGE)" == "x" ]; then
+            # collect uninstalled packages
+            echo $PACKAGE >> $INSTLIST
+            # collect prerequisites
+            opkg info "$PACKAGE" |
+            awk "/^Depends: / {
+                                sub(\"Depends: \", \"\");   \
+                                gsub(\", \", \"\\n\");      \
+                                print >> \"$PREQLIST\";      \
+                              }"
+        fi
+    done
+fi
+
+#
+# Install or script
+#
+
+if [ $COMMAND == "install" ]; then
+    # install packages
+    cat "$INSTLIST" | while read PACKAGE; do
+        if grep -q "^$PACKAGE\$" "$PREQLIST"; then
+            # prerequisite package, will be installed automatically
+            if $VERBOSE; then
+                echo "$PACKAGE installed automatically"
+            fi
+        else
+            # install package
+            opkg $OPKGOPT install $PACKAGE
+        fi
+    done
+elif [ $COMMAND == "script" ]; then
+    # output install script
+    echo "#! /bin/sh"
+    cat "$INSTLIST" | while read PACKAGE; do
+        if ! grep -q "^$PACKAGE\$" "$PREQLIST"; then
+            echo "opkg install $PACKAGE"
+        fi
+    done
+else
+    echo "Unknown command '$COMMAND'."
+    echo ""
+    echo_usage
+    exit 1
+fi
+
+# clean up and exit
+exit 0