On Tue, Apr 15, 2008 at 1:14 PM, Marijn Schouten (hkBst)
<[EMAIL PROTECTED]> wrote:
>
> Hi list,
>
> it seems I have been using some fragile sed expression and I'd like to tap
> the collective
> wisdom for avoiding doing that in the future.
>
> dev-scheme/slib-3.1.5-r1 currently does
>
> sed "s_prefix = /usr/local/_prefix = ${D}/usr/_" -i Makefile
>
> to make it not violate the sandbox. However a user had set
> PORTAGE_TMPDIR=/home/gentoo_overflow/tmp causing the sed expression to
> contain too may
> underscores and failing.[1]
>
> There are several option to handle this. I could use a less common
> delimiter or I could
> escape it: ${D//_/\_} instead of ${D}. I could use a sed expression that
> doesn't suffer
> from this problem (thanks to dleverton):
>
> sed -ne '\_^prefix = /usr/local_!{p;d}' -e "iprefix = ${D}" -i Makefile
>
> Comments?
>
Currently is use ':' as sed delimiter when paths are involved. I'd
also like to hear from you about proper delimiters if you think ':' is
not safe enough.
AFAIK, the only corner case which would make this fail would be
Windows paths (C:/gentoo-prefix).
Regards,
--
Santiago M. Mola
Jabber ID: [EMAIL PROTECTED]
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