| 1 |
Donnie Berkholz wrote: |
| 2 |
> On 13:34 Fri 05 Oct , Steve Long wrote: |
| 3 |
>> In actual fact, I'd be more likely to use parameter expansion than set, |
| 4 |
>> eg: spec=${CHOST#*-*-} # chop first two fields off so spec is fields 3 on |
| 5 |
>> spec=${spec%%-*} # chop all but first off so left with just field 3 |
| 6 |
>> ..which I believe works in sh[1] as well. The point for me, however, is |
| 7 |
>> not whether sh can be kludged to do something, it's what the most |
| 8 |
>> efficient ways to do something in scripts are. Whether you use pe, read |
| 9 |
>> or an array, avoiding externals leads to quicker scripts.[2] |
| 10 |
> |
| 11 |
> That parameter workaround wouldn't work, because CHOST may also contain |
| 12 |
> just 3 fields, as it does on Gentoo/BSD. Unpack a portage tarball and |
| 13 |
> look at the make.conf's if you're curious. |
| 14 |
> |
| 15 |
Then the second expansion would have no effect. |
| 16 |
|
| 17 |
> Avoiding externals at the cost of added complexity on something that |
| 18 |
> only gets called one time certainly qualifies as premature optimization. |
| 19 |
> |
| 20 |
True enough. It might be more relevant for eclasses, or maybe only for |
| 21 |
actual bash scripts. |
| 22 |
|
| 23 |
|
| 24 |
-- |
| 25 |
gentoo-dev@g.o mailing list |
Archives