fish is deliberately incompatible with POSIX in several ways. For example,
splitting of variables, via IFS:
foo='John Doe'
echo $foo
POSIX requires us to throw away all the whitespace, and output 'John Doe'.
Dumb, huh? So making fish POSIX compliant would compromise usability.
Other shells like bash have a POSIX compatibility mode, even allowing them to
be used as a replacement for /bin/sh. However supporting this requires
introducing a great deal more complexity - see for example
http://www.gnu.org/software/bash/manual/html_node/Bash-POSIX-Mode.html for a
partial list, which would be significantly longer for fish, because it's much
further away from /bin/sh than is bash.
More interesting than POSIX compliance would be a bash compatibility mode,
which would allow fish to take advantage of tools like rbenv without requiring
them to be rewritten for fish. Such a mode would not have to fully emulate
bash, just enough to support such tools.
_fish
On Jan 13, 2013, at 7:55 AM, Hormatzhan Yiltiz <hyil...@gmail.com> wrote:
> I do not think POSIX compatibility is a matter that concerns most fish users,
> but it would be just much better if it could be someday.
> Is fish gonna be one someday in the near or distant future?
>
> ========================
> He who is worthy to receive his days and nights is worthy to receive all else
> from you (and me).
> The Prophet, Gibran Kahlil
> Gibran
> ------------------------------------------------------------------------------
> Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS,
> MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current
> with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft
> MVPs and experts. ON SALE this month only -- learn more at:
> http://p.sf.net/sfu/learnmore_123012_______________________________________________
> Fish-users mailing list
> Fish-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/fish-users
------------------------------------------------------------------------------
Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS,
MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current
with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft
MVPs and experts. ON SALE this month only -- learn more at:
http://p.sf.net/sfu/learnmore_123012
_______________________________________________
Fish-users mailing list
Fish-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/fish-users
