[Bash-completion-devel] [bash-completion-Bugs][311393] DBTS 501479: don't assume sed being GNU sed on Linux systems

[bash-completion-bugs at alioth.debian.org]

Bugs item #311393, was changed at 2009-01-30 10:49 by Ville Skyttä 
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>Status: Closed
Priority: 3
Submitted By: David Paleino (hanska-guest)
>Assigned to: Ville Skyttä  (scop-guest)
Summary: DBTS 501479: don't assume sed being GNU sed on Linux systems 
Distribution: None
Originally reported in: Debian BTS
>Milestone: 2.0
>Status: Fix Committed
Original bug number: 501479


Initial Comment:
* bash-completion assumes that a uname of Linux implies that the "sed"
  command refers to GNU sed, while on other systems it aliases sed to
  "gsed" if present.  While not possible on Debian, someone could
  easily make a Linux system with GNU sed installed as "gsed" and some
  other standards-compliant sed installed as "sed".  Why bother having
  the check for Linux at all?  Just always use "gsed" if present.
  Incidentally, bash-completion also leaves the alias sed=gsed in
  place if added, which seems like a surprising side-effect to occur
  due to sourcing bash-completion.


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>Comment By: Ville Skyttä  (scop-guest)
Date: 2010-01-19 22:01

Message:
A significant number of sed portability fixes has been done in git, and sed is no longer aliased to gsed.  More testing on non-GNU systems is still welcome though.

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Comment By: Ville Skyttä  (scop-guest)
Date: 2009-05-29 22:50

Message:
"unalias sed" is not the right thing to do.  Completions stay around after the bash_completion file has been read and invoke "sed" a lot, and we need that sed to still be a GNU compatible one at runtime.

The right thing to do would be to make sure bash_completion's sed usage is POSIX compliant and not use any GNU sed'isms and/or to convert stuff to use other as commonly available but more portable tools where applicable.  That's quite a bit of work and more importantly, needs active testing (at least some of which we can hopefully make automatic in the nearish future).

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Comment By: Sung Pae (guns-guest)
Date: 2009-05-29 08:53

Message:
Yes this is annoying. Consider the BSDs!

This really is as simple as adding 'unalias sed' at the bottom of the file.

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