-export EDITOR="emacsclient"
-# this makes emacsclient file/-c start a server instance if none is running,
-# instead of some alternate editor logic
-export ALTERNATE_EDITOR=""
-
-# ubuntu starts gpg agent automatically with /etc/X11/Xsession.d/90gpg-agent.
-# fedora doesn't, which left me to figure this out, and google was no help.
-# fedora documentation is often quite bad :(
-# This is mostly copied from that file.
-# Main difference is that we eval the result of starting gpg-agent,
-# while that file executes it through xsession specific var.
-# Also make sourcing the pidfile make more sense.
-# End result should be the same afaik.
-# for gpg-agent to work when calling gpg from the command line,
-# we need an environment variable that is setup via the eval.
-# which is why we do this upon login, so it can propogate
-# It is also written to the file $HOME/.gnupg/gpg-agent-info-$(hostname)
-# I'm not aware if that is ever used, but just fyi.
-# I also added the bit about xmessaging the stderr,
-# because I'd like to know if the command fails
-if [ -f /etc/fedora-release ]; then
- : ${GNUPGHOME=$HOME/.gnupg}
-
- GPGAGENT=/usr/bin/gpg-agent
- PID_FILE="$GNUPGHOME/gpg-agent-info-$(hostname)"
-
- if ! $GPGAGENT 2>/dev/null; then
- temp="$(mktemp)"
- eval "$($GPGAGENT --homedir /p/do-not-delete --daemon --sh --write-env-file=$PID_FILE 2>$temp)"
- temperr="$(<"$temp")"
- [ -n "$temperr" ] && xmessage "gpg-agent stderr: $temperr"
- elif [ -r "$PID_FILE" ]; then
- . "$PID_FILE"
- export GPG_AGENT_INFO
+##### setup /nocow.
+# a nocow dir that is common to multiple distros installed on the same system
+dir=/nocow
+if has_btrfs; then
+ if ! mountpoint $dir; then
+ subvol=/mnt/root/nocow
+ if [[ ! -e $subvol ]]; then
+ s btrfs subvolume create $subvol
+ s chown root:1000 $subvol
+ s chattr +C $subvol
+ fi
+
+ first_root_crypt=$(awk '$2 == "/" {print $1}' /etc/mtab)
+ tu /etc/fstab <<EOF
+$first_root_crypt /nocow btrfs noatime,subvol=nocow 0 0
+EOF
+ s mkdir -p $dir
+ s chown $USER:$USER $dir
+ s mount $dir