gentooup.sh: add option to disable locking

gentooup.sh

@@ -1,14 +1,6 @@
 #!/bin/bash
 
 LOCKFILE=/usr/portage/gentooup.lock
-exec {FD_LOCK}<>"$LOCKFILE"
-echo "Try to acquire lock for $LOCKFILE"
-if ! flock -x -w 60 "$FD_LOCK" ; then
-  echo "Could not acquire lock for $LOCKFILE"
-  exit 1
-fi
-echo "Lock acquired"
-
 PORTAGE_OPTIONS=("--keep-going" "--autounmask-write" "--binpkg-changed-deps=y" "--autounmask-continue")
 
 PORTAGE_UPGRADE_OPTIONS=("-vuNDk")
@@ -54,6 +46,11 @@ while [[ $# -gt 0 ]]; do
         SYNC_COMMAND=""
         shift
         ;;
+      --no-lock)
+        echo "not locking"
+        NO_LOCK=1
+        shift
+        ;;
       --full)
         echo "Do a full upgrade including build dependencies"
         PORTAGE_UPGRADE_OPTIONS+=("--with-bdeps=y")
@@ -92,6 +89,16 @@ myemerge() {
   echo "emerge return value: $?"
 }
 
+if [[ -z "$NO_LOCK" ]] ; then
+  exec {FD_LOCK}<>"$LOCKFILE"
+  echo "Try to acquire lock for $LOCKFILE"
+  if ! flock -x -w 60 "$FD_LOCK" ; then
+    echo "Could not acquire lock for $LOCKFILE"
+    exit 1
+  fi
+  echo "Lock acquired"
+fi
+
 if [[ -n ${SYNC_COMMAND}  ]] ; then
   ${SYNC_COMMAND}
   eix-update >& /dev/null