Add a dialog option to uncheck installed packages.

This makes it handier to skip the build for already installed packages.
Note that "installed packages" here includes different versions, since
only the package name is checked.

Signed-off-by: Mauro Giachero <mauro.giachero@gmail.com>

src/usr/sbin/sbopkg

@@ -724,6 +724,7 @@ check_for_updates() {
                     echo "  Repo version: " \
                         $NAME-$NEWVER-$NEWARCH-${NEWBUILD}$REPO_TAG \
                         >> $UPDATELIST
+                    # NOTE: When changing, see the uncheck_installed() comment
                     echo "$NAME \"Installed $PKG_VER\" ON" >> \
                         $SBOPKGTMP/sbopkg-update-queue
                 elif [[ $UPDATED -eq -1 ]]; then
@@ -1912,9 +1913,11 @@ add_item_to_queue() {
                 grep "$APP-[^-]*-[^-]*-[^-]*$REPO_TAG\$")
             if [[ -n $INSTALLED ]]; then
                 VERSION=$(sed 's:^.*-\([^-]*\)-[^-]*-[^-]*$:\1:'<<<$INSTALLED)
+                # NOTE: When changing, see the uncheck_installed() comment
                 echo "$APP \"Installed $VERSION\" $ONOFF" >> $TMPQUEUE
                 echo "$APP \"Installed $VERSION\" $ONOFF" >> $QUEUELIST
             else
+                # NOTE: When changing, see the uncheck_installed() comment
                 echo "$APP New $ONOFF" >> $TMPQUEUE
                 echo "$APP New $ONOFF" >> $QUEUELIST
             fi
@@ -1944,16 +1947,31 @@ add_item_to_queue() {
     return 0
 }
 
+uncheck_installed() {
+    # This function unchecks the installed items in a given queue.
+    # $1 = the queue file.
+    # NOTE: This function uses the second field (New/Installed foo) to
+    # work, so we should be careful when changing its format.
+
+    local QUEUEFILE=$1
+
+    sed -i 's:^\([^ ]* .*Installed.*\)[^ ]*$:\1OFF:' $QUEUEFILE
+}
+
 view_queue() {
     # This function displays the contents of the build queue.
     # Returns 0 if the user choose OK, nonzero otherwise
 
     local ANSQUEUE=$SBOPKGTMP/sbopkg-ans-queue
     local WORKINGQUEUE=$SBOPKGTMP/sbopkg-working-queue
+    local ORIGINALQUEUE=$SBOPKGTMP/sbopkg-original-queue
+    local CHOICE
 
     empty_queue && return 1
+    cp $TMPQUEUE $ORIGINALQUEUE
     while :; do
         dialog --title "Viewing Build Queue" --separate-output \
+            --extra-button --extra-label "Uncheck installed" \
             --cancel-label "Back" --checklist "$(crunch "The \
             following packages are currently \
             in the build queue.  Please note that when the build queue \
@@ -1961,31 +1979,36 @@ view_queue() {
             optionally installed, in the order listed from top to \
             bottom.\n\nPlease select or unselect those packages you wish \
             to keep in the build queue and then press <OK> to continue \
-            or press <Back> to go back.")" 30 50 14 \
+            or press <Back> to go back.")" 30 70 14 \
             --file $TMPQUEUE 2> $ANSQUEUE
-        case $? in # 0 = OK, 1 = Sort, 2 = Cancel, 3 = Reverse
+        CHOICE=$?
-            0)
+
         rm -f $WORKINGQUEUE
         # Reading from $TMPQUEUE...
         while read PICK; do
             TESTAPP="${PICK// */}"
             if grep -qx "$TESTAPP" $ANSQUEUE; then
-                        sed 's/OFF/ON/' <<< "$PICK" >> $WORKINGQUEUE
+                sed 's/OFF$/ON/' <<< "$PICK" >> $WORKINGQUEUE
             else
-                        sed 's/ON/OFF/' <<< "$PICK" >> $WORKINGQUEUE
+                sed 's/ON$/OFF/' <<< "$PICK" >> $WORKINGQUEUE
             fi
         done < $TMPQUEUE
         mv $WORKINGQUEUE $TMPQUEUE
+
+        case $CHOICE in # 0 = OK, 3 = Uncheck installed
+            0) # OK
                 return 0
                 ;;
+            3) # Uncheck installed
+                uncheck_installed $TMPQUEUE
+                ;;
             *) # Cancel or ESC
-                rm -f $ANSQUEUE
+                mv $ORIGINALQUEUE $TMPQUEUE
-                break
+                rm -f $WORKINGQUEUE $ANSQUEUE
+                return 1
                 ;;
         esac
     done
-    rm -f $WORKINGQUEUE
-    return 1
 }
 
 add_all_to_queue() {