On Tue, Jan 25, 2022 at 02:24:26AM +0700, Robert Elz wrote: > Date: Mon, 24 Jan 2022 19:53:03 +0100 > From: Andreas Kusalananda =?utf-8?B?S8OkaMOkcmk=?= > <andreas.kah...@abc.se> > Message-ID: <Ye71jwgBhenC33RD@box> > > | Why would people want it to do that (i.e. export PS1)? > > It isn't exporting PS1 that's the issue, it is importing it. And that > I rely on quite frequently. (Of course, it has to be exported by something > to be imported elsewhere - which gives the reason why one would want to > export PS1). > > Eg: I am often working with several variants of the same basic shell > (various bug fixes, or attempts at them, or new features being developed) > and I want to get some hint of which variant I have running in some particular > window, so when I run test code, and it works, or doesn't, I know which > variant did what). > > To do that, given that they are 99.9% identical shells (including all startup > scripts etc) I just do > > PS1='bugfix1 $ ' /path/to/shell1 > PS1='newfeat $ ' /path/to/shell2 > PS1='standard$ ' /bin/sh > > (in different windows, one for each, of course), then however I move > the windows around, or whatever else I do (aside from changing PS1 > obviously) I always know which variant is running. > > If a shell refused to import PS1, this wouldn't work. > > kre > >
This, together with Chet's and Greg's mail; All around good and reasonable things said by people I trust to say sensible things about the shell. Thanks. I'll stand down from my "you need to do something right now" position. Take care, -- Andreas (Kusalananda) Kähäri SciLifeLab, NBIS, ICM Uppsala University, Sweden .
