doublecmd-svn-revision-in-rpm.patch

diff --git a/install/linux/update-revision.sh b/install/linux/update-revision.sh
index f5905e3f..01278b00 100755
--- a/install/linux/update-revision.sh
+++ b/install/linux/update-revision.sh
@@ -1,11 +1,15 @@
 #!/bin/sh
 
-# DC revision number
-export DC_REVISION=$(svnversion $1 | sed -e 's/\([0-9]*\).*/\1/')
+# DC revision number - leverage if already set or get from local SVN copy
+if [[ "${DC_REVISION}" == '' ]]; then
+  export DC_REVISION=$(svnversion $1 | sed -e 's/\([0-9]*\).*/\1/')
+fi
 
-# Update dcrevision.inc
-echo "// Created by Svn2RevisionInc"      >  $2/units/dcrevision.inc
-echo "const dcRevision = '$DC_REVISION';" >> $2/units/dcrevision.inc
+if [[ "${DC_REVISION}" != '' ]]; then
+  # Update dcrevision.inc if available
+  echo "// Created by Svn2RevisionInc"      >  $2/units/dcrevision.inc
+  echo "const dcRevision = '$DC_REVISION';" >> $2/units/dcrevision.inc
+fi
 
 # Return revision
 echo $DC_REVISION