-# first see if we've already done this.
-# if we find any occurrence of the replacement, we assume we already did it.
-# ** we're assuming a lot about the structure of the samba config file!
-grep -q "$replacement" /etc/samba/smb.confÂ
+# we just always do the replacement now, after realizing the sentinel pattern
+# was acutally already in the file... too much subtlety can get one into trouble.
+sed -i "0,/$pattern/{s/$pattern/$replacement/}" /etc/samba/smb.conf
+test_or_die "patching samba configuration to enable write acccess on user home dirs"
+# sweet, looks like that worked...
+restart_samba
+echo successfully patched the samba configuration to enable writes on user home directories.
+
+##############
+
+# add the latest version of the cakelampvm environment variables for apache.
+
+sep
+
+# drop existing file, if already configured. ignore errors.
+a2disconf env_vars_cakelampvm &>/dev/null
+
+# plug in the new version, just stomping anything there.
+# note: we only expect to have one version of the env_vars dir at a time in place in feisty...
+\cp -f $FEISTY_MEOW_APEX/production/sites/cakelampvm.com/rolling/env_vars.*/env_vars_cakelampvm.conf /etc/apache2/conf-available
+test_or_die "copying environment variables file into place"
+
+# enable the new version of the config file.
+a2enconf env_vars_cakelampvm
+test_or_die "enabling the new cakelampvm environment config for apache"
+
+echo Successfully configured the apache2 environment variables needed for cakelampvm.
+
+##############
+
+# add in a swap mount if not already configured.
+
+sep
+
+# check for existing swap.
+free | grep -q "Swap:[[:blank:]]*[1-9][0-9]"