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