Add cache home (~ XDG_CACHE_HOME)

bin/saturnin.skel

 SATURNIN_LIBEXEC="__SATURNIN_LIBEXEC__"
 export FFOO_CONFIG_PATH=$(mkconfpath | tr '\n' :)
 export SATURNIN_VERSION="__VERSION__"
+export SATURNIN_CACHE_HOME="__SATURNIN_CACHE_HOME__"
 
 ffoo import exits
 ffoo import pretty

config.mk

 MANPREFIX = ${PREFIX}/share/man
 SATURNIN_CONFIG_PATH_LOCAL = /etc/saturnin
 SATURNIN_CONFIG_PATH_USER = .saturnin
+SATURNIN_CACHE_HOME = .local/share/saturnin

setup/mk.sh

     perl -pe "
         s|__SATURNIN_CONFIG_LOCAL__|$SATURNIN_CONFIG_PATH_LOCAL|;
         s|__SATURNIN_CONFIG_USER__|\\\$HOME/$SATURNIN_CONFIG_PATH_USER|;
+        s|__SATURNIN_CACHE_HOME__|\\\$HOME/$SATURNIN_CACHE_HOME|;
         s|__SATURNIN_SHARE__|$shrdir|;
         s|__SATURNIN_LIBEXEC__|$lexdir|;
         s|__VERSION__|$(get_version)|;