::  Posts  ::  RSS  ::  ◂◂RSS  ::  Contact

Bash quibbles

January 23rd, 2009
programming, shell  [html]
I like bash. It does a lot of things well and makes my life on the command line a lot more pleasant. It generally has nice tab completion, but there are some ways it would work better, though:
  1. Tab completion on paths containing environment variables should not expand them. Or if it is going to expand them, it should not follow with a space. If I'm doing everything relative to the directory $ON_B then I don't care that it expands to /nfs/man/this/path/is/freakin/long/on_b. With my shell PS1 hack (below) I don't have to see this depth all the time, but it could be even better.
  2. Tab completion should understand filename wildcards. If I have 'ls $ON_B/{a,b}*/repor and press tab then I want to have the command replaced by ls $ON_B/{a,b}*/report/. The logic is a little tricky. And there's even a bit of ambiguity: if the directory reporting appears in one (or more) of the possible expansions but not in all of them, while the directory report appears in all, do we ignore reporting? This affects whether we append the trailing slash in this case, and has widespread effects in other cases. I'm inclined to have it complete only with things that exist in all matches. Note that with this completion rule, to get something that exists in some of the matches, you need to edit the path being completed to rule out the things that don't have it. So while I wouldn't complete reporting from ls $ON_B/{a,b}*/repor if any of the dirs didn't have reporting, I would complete it from ls $ON_B/{a,b}*/reporti.

On a completely different subject, I've started using the InvertColors Firefox addon, and it makes pages look a lot nicer.

Comment via: facebook

Recent posts on blogs I like:

No need to explain

I haven’t been posting much lately for several reasons, but mainly I just haven’t felt the desire to post. My posts usually come from trying to figure something out through reflection, or to explain myself to myself. I haven’t felt the need to explain mys…

via Holly Elmore December 8, 2019

Grad school is worse for public health than STDs

(The way you can *really* tell something is horribly wrong is that grad students find PhD Comics darkly funny, not just dark.)

via benkuhn.net December 8, 2019

I’m Giving a Talk About Construction Costs Tomorrow

By popular demand, I’m giving the talk I gave 2 weeks ago at NYU, again. The database will be revised slightly to include more examples (like Ukraine, which I added between when I gave the talk and when I blogged about it), and I may switch around a few t…

via Pedestrian Observations December 2, 2019

more     (via openring)

More Posts:


  ::  Posts  ::  RSS  ::  ◂◂RSS  ::  Contact