Calling esqlite with a customised sqliterc file

[alastairdb]

I wanted to use sqlite with the pcre library loaded so that I could use regular expressions in WHERE clauses. I ended up doing this by creating my own sqliterc file with a .load pcre line. I got calls to esqlite-helm-call-command to pick this up by wrapping them with (let ((esqlite--default-init-file .... Is there a better way of doing this?