Support for 0install apps
Create a new app with these requirements.
You should call set_selections
immediately after this.
Remove this app and any shell command created with integrate_shell
.
Get the dates of the available snapshots, starting with the most recent. Used by the "0install whatchanged" command.
Get the current selections. Does not check whether they're still valid.
Safe_exception
if they're missing.
Get the current selections. If they're missing or unusable, start a solve to get them. If they're usable but stale, spawn a background update but return immediately.
Place an executable in $PATH that will launch this app.