${VERSION%.*} in DETAILS - Was - Re: [Lunar-commits] <moonbase> Twisted: Version bumped to 11.0.0 + DETAILS fixes

[Stefan Wold]

On Wed, 2011-06-15 at 11:19 +0200, Duncan Gibson wrote:

> I read the bash man page on ${parameter%word} but I'm not really any
> wiser on what the substitution could potentially expand to and match.
> Any chance of a "Bash for Dummies" explanation on what this will do?

It's quite simple really. ${parameter%word} would remove first match of
'word' from the end of the parameter (string). ${VERSION%.*} means
remove first occurence of . read from right to left and everything after
it using '*'. If VERSION is 11.2.3 that would give you '11.2'. If you
want '11' instead all you need to do is to add another % like: ${VERSION
%%.*}, this means longest match possible. First match would remove .3,
the second match .2 (read from right to left ie suffix) there third will
not match since there's no . in front of 11. 

It's also possible to do the removal from the begining (prefix) by using
# or ## instead of % or %%. ${VERSION#*.} would then give you '2.3' and
${VERSION##*.} would give you '3'.

I hope that made things a bit more clear.

> 
> Also, like sofar's fix in theedge that will remove the need for $C_FIFO,
> is the plan to replace:
> 
>   a) all use of $MAJOR,
>   b) all use of $VERSION in the SOURCE_URL with ${VERSION%.*}
> 
> throughout the complete moonbase?


Yes, we should. It's mostly KDE and gnome stuff that use MAJOR today I
believe, shouldn't be to hard to fix.


-- 
Sincerely
Stefan Wold
Lunar Linux developer  -  PGP public key 9FF9A9CF 

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