From: Bakul Shah <bakul@iitbombay.org>
To: Jon Steinhart <jon@fourwinds.com>
Cc: TUHS main list <tuhs@minnie.tuhs.org>
Subject: Re: [TUHS] Systematic approach to command-line interfaces [ meta issues ]
Date: Sat, 31 Jul 2021 15:04:48 -0700 [thread overview]
Message-ID: <3598EE71-E652-43EF-B1AB-91CB8B3D577A@iitbombay.org> (raw)
In-Reply-To: <202107311920.16VJK2jT2362871@fourwinds.com>
On Jul 31, 2021, at 12:20 PM, Jon Steinhart <jon@fourwinds.com> wrote:
>
> So I never got getopt(). One of my rules is that I don't use a library
> in cases where the number of lines of gunk that that it takes to use a
> library function is >= the number of lines to just write it myself. Yeah,
> I know the "but the library has more eyeballs and is debugged" argument
> but in reality libraries are the source of many bugs. I've always taken
> the approach that I would never hire someone who had to use a library to
> implement a singly-linked list.
getopt() is perhaps the wrong solution but consider something like MH,
whose commands all follow a common pattern. Consider:
- options (switches) all start with a single '-'
- they may be abbreviated to a unique prefix.
- Boolean options may be inverted by prepending -no (e.g. -nolist)
- value options may also have -no format to remove a previous (or default) value
- options may appear anywhere and the last instance wins
But different commands take different options. It would make sense to factor
out common parsing, help etc. for a consistent treatment. In my Go code for
parsing MH like options I used Go's flag package as a model.
Personally I vastly prefer MH style option processing to either single char
options or --very-long-names which can't be abbreviated. Never mind options for
commands like gcc, who can even remember 40+ ls options?
But I haven't thought about how to extend this for shell scripts, or
exposing these so that shells like zsh can do command completion. To specify
these you need a vector of tuples (name, type, default, brief-help) but that
is painful to do in a shell.
next prev parent reply other threads:[~2021-07-31 22:05 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-31 12:25 [TUHS] Systematic approach to command-line interfaces Michael Siegel
2021-07-31 13:05 ` Dan Halbert
2021-07-31 14:21 ` Adam Thornton
2021-07-31 14:25 ` Adam Thornton
2021-07-31 15:45 ` Richard Salz
2021-07-31 16:03 ` Clem Cole
2021-07-31 16:06 ` Richard Salz
2021-07-31 16:21 ` Clem Cole
2021-07-31 16:17 ` Clem Cole
2021-07-31 16:30 ` Dan Cross
2021-07-31 15:56 ` Paul Winalski
2021-07-31 16:19 ` Dan Cross
2021-08-01 17:44 ` Chet Ramey
2021-08-01 21:53 ` Dan Cross
2021-08-01 23:21 ` Chet Ramey
2021-08-01 23:36 ` John Cowan
2021-08-01 23:49 ` Larry McVoy
2021-08-02 0:28 ` Larry McVoy
2021-08-01 23:58 ` Dan Cross
2021-08-02 0:29 ` Steve Nickolas
2021-08-02 0:13 ` Andrew Warkentin
2021-08-02 0:18 ` John Cowan
2021-08-02 0:54 ` Andrew Warkentin
2021-08-02 1:04 ` Dan Cross
2021-08-02 1:05 ` Theodore Ts'o
2021-08-02 2:10 ` Andrew Warkentin
2021-08-02 2:32 ` Bakul Shah
2021-08-02 17:33 ` Lars Brinkhoff
2021-09-28 17:46 ` Greg A. Woods
2021-09-28 18:10 ` Larry McVoy
2021-09-29 16:40 ` Greg A. Woods
2021-09-29 16:57 ` Larry McVoy
2021-09-30 17:31 ` Greg A. Woods
2021-09-29 23:10 ` Phil Budne
2021-08-02 17:37 ` Lars Brinkhoff
2021-08-02 18:52 ` Clem Cole
2021-08-02 20:59 ` John Cowan
2021-08-02 21:06 ` Al Kossow
2021-08-02 21:14 ` Clem Cole
2021-08-02 21:13 ` Clem Cole
2021-08-01 16:51 ` Michael Siegel
2021-08-01 17:31 ` Jon Steinhart
2021-07-31 16:41 ` Clem Cole
2021-07-31 17:41 ` John Cowan
2021-07-31 17:30 ` Anthony Martin
2021-07-31 17:46 ` John Cowan
2021-07-31 18:56 ` Michael Siegel
2021-07-31 19:41 ` Clem Cole
2021-07-31 21:30 ` Michael Siegel
2021-08-01 17:48 ` Chet Ramey
2021-08-01 19:23 ` Richard Salz
2021-08-01 23:26 ` Chet Ramey
2021-07-31 19:20 ` [TUHS] Systematic approach to command-line interfaces [ meta issues ] Jon Steinhart
2021-07-31 21:06 ` Richard Salz
2021-07-31 21:32 ` Jon Steinhart
2021-07-31 21:37 ` Richard Salz
2021-07-31 21:55 ` Jon Steinhart
2021-07-31 22:10 ` Warner Losh
2021-07-31 22:19 ` Larry McVoy
2021-07-31 22:20 ` Jon Steinhart
2021-07-31 23:26 ` Warner Losh
2021-07-31 23:41 ` Jon Steinhart
2021-07-31 22:04 ` Bakul Shah [this message]
2021-07-31 22:13 ` Larry McVoy
2021-07-31 22:14 ` Bakul Shah
2021-07-31 22:17 ` Bakul Shah
2021-07-31 22:16 ` Jon Steinhart
2021-07-31 22:20 ` Bakul Shah
2021-08-01 18:17 Douglas McIlroy
2021-08-01 19:48 ` arnold
2021-08-01 21:30 ` John Cowan
2021-08-02 12:11 ` Steffen Nurpmeso
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