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9862 :: command line parametr with whitespace

• domogled (orginal) [2023-02-02T12:50:49+01:00] view original

  Hello,

  why I add parameter in command line with whiutespace?

  echo parseCmdLine("""---title:"new title with whitespace" """)
  Run

  parse:

  @["---title:new", "title", "with", "whitespace\""]

  Module works similarly:

  
  opt cmdLongOption ---title:new
  opt cmdArgument title
  opt cmdArgument with
  opt cmdArgument whitespace"
  Run

  I can one Option with value "new title with whitespace"

  thanks

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• enthus1ast (orginal) [2023-02-02T13:42:02+01:00] view original

  this actually works for me:

  import os
  echo parseCmdLine("""---title:"new title with whitespace" """)
  Run

  output:

  @["---title:new title with whitespace"]
  Run

  i'm currently on nim 1.6.10 [Windows: amd64]

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• enthus1ast (orginal) [2023-02-02T13:43:56+01:00] view original

  for quickly adding nice parameter support to my applications, i tend to use cligen https://github.com/c-blake/cligen

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• domogled (orginal) [2023-02-04T10:33:53+01:00] view original

  thanks,

  it seems to depend on the system settings

  Im use Linux Manjaro (Mabox), fish shell (when I use bash, the result is the same).

  What do you use?

  thanks

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• enthus1ast (orginal) [2023-02-04T12:40:35+01:00] view original

  I just tried the code you sent (on a wi does 10)

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• cblake (orginal) [2023-02-04T15:44:57+01:00] view original

  Possibly helpful. The impl on Windows & Unix differs (big when and documented differences in lib/std/cmdline.nim). On Linux one sees (instead of what @enthus1ast describes):

  import os
  let x = r"""--title "new title with whitespace""""
  #                  ^space needed    can skip 1^
  echo "inp: ", x.repr
  echo "prs: ", x.parseCmdLine
  #Output:
  # inp: "--title \"new title with whitespace\""
  # prs: @["--title", "new title with whitespace"]
  Run

  Doing full shell lexing (&| a variety of string splitters) was discussed in a PR which had trouble getting merged due to detailed PR mechanics.

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• shirleyquirk (orginal) [2023-02-04T16:28:28+01:00] view original

  There is a bug in parseCmdLine when not on windows.

  https://github.com/nim-lang/Nim/issues/14343

  this line should probably be:

  while i < c.len and c[i] > ' ' and not (c[i] in  {'\'','"'} ):
  Run

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• SolitudeSF (orginal) [2023-02-04T21:41:40+01:00] view original

  wonder, what is the point of having in stdlib stuff that is completely broken.

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• cblake (orginal) [2023-02-04T22:52:02+01:00] view original

  Oh, yeah, FWIW, @domogled's apparent intent can be gotten with

  let x = r""""--title:new title with whitespace""""
  #           ^start with "           can skip 1^
  Run

  on both Linux & Windows. Not great, but maybe not totally useless.

  There are "better" external things to do X for most X in the stdlib. Forum search fails me at the moment, but at some point Araq said something like "stdlib cannot keep up with anything!" There have been big discussions & experiments on evolving it with inconclusive results. Repeating all that here seems less prudent than a new Forum thread.

  FWIW, I was ok with that PR under a new name/etc. as it was evolving to. I just thought imposing a need for try/except where it wasn't before was needlessly disruptive (and I took issue with what I thought weak arguments and an overly narrow perspective).

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