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Reading Greg's post on security upgrades and a few mentions of patches in the following discussion got me thinking about upgrade methods.
The standard Drupal method is to delete existing files and unpack a tarball to replace the old version - I find this method unappealing because: I keep my code in subversion so don't want to delete the .svn subdirectories, and sometimes I have patches applied that I don't want to loose.
The drush script which provides comman line acceess to drupal functionality emits an error message when run as a cron job
tput: No value for $TERM and no -T specified# If it is not exported determine and export the number of columns.
if [ -z $COLUMNS ]; then
export COLUMNS=$(tput cols)
fiI presume drush uses this information to calculate layout of output.
However when running as a cron job COLUMNS is not set and tput gives the above error.
Drupal has a fairly easy to meet set of requirements http://drupal.org/node/502452
But Drupal projects are free to set their own rules in this area and Drush has used functions only available in PHP 5.2 - as far as I can see this is just the json functions.
Frustratingly the latest version of RedHat provides PHP 5.1 and this is the second time I've run into the problem with a client who uses RedHat and understandably wants to stick to the standard packages.
