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katabami
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Joined: 11 Jul 2009
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PostPosted: Sat May 15, 2010 4:07 am    Post subject: TIP: How NOT no compress (tex)info files when emerging Reply with quote

Files under /usr/share/info get compressed when installed. But it slows down browse and search. Here's how NOT to get them compressed:

Open the file /usr/lib/portage/bin/ebuild-helpers/prepinfo, and
comment out the last line, as:

Code:
# exec ecompressdir --queue "${infodir}"


To protect the file from change at portage update, edit /etc/make.conf, too [1]:

Code:
CONFIG_PROTECT="your/own/other/files /usr/lib/portage/bin/ebuild-helpers/prepinfo"

That's all!

Pro:
Speed is greatly reduced when reading and searching. I don't know if this matters for recent PCs, but I like it much.
Con:
Takes extra HDD space. Factor 5 is a good estimate.

[1]: If yours is amd64-mulitlib, then the path has to be /usr/lib64/....
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teika
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Joined: 19 Feb 2011
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PostPosted: Mon Jul 16, 2012 9:28 am    Post subject: Reply with quote

The above trick is not sufficient for some ebuilds, like app-text/emacs; you have to edit the file ecompressdir, too. I've posted an update to the Gentoo Wiki Portage tips page.
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sera
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PostPosted: Mon Jul 16, 2012 3:38 pm    Post subject: Reply with quote

Setting PORTAGE_COMPRESS="" in make.conf should do. See 'man make.conf' for more fine grained control.
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teika
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PostPosted: Wed Jul 18, 2012 1:03 am    Post subject: Reply with quote

Thanks, I didn't know it. I updated the wiki.

But I need this hack; I'd like to keep /usr/share/{man,share} compressed. And some info files, including emacs related ones, lack the suffix .info, so PORTAGE_COMPRESS_EXCLUDE_SUFFIXES doesn't work. Info files "emacs" and "elisp" are better to be plain, since they're big and compression greatly slows down searching.
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Hack of easy Shift / Ctrl / AltGr etc; save your pinkies, type without drudgery: topic 865313

XPAT - Xi, Putin, Abe and Trump - are security holes of their own nations.
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sera
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Joined: 29 Feb 2008
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PostPosted: Wed Jul 18, 2012 9:41 am    Post subject: Reply with quote

Maybe you should request a PORTAGE_COMPRESS_EXCLUDE_PATHS then? Seems you are not the only one who wants to do this or similar.

Other things I probably should mention in this context are INSTALL_MASK for documentation you do not want in the first place and the possibility to use less cpu intensive compression like gzip.
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ulm
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Joined: 04 Oct 2004
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Location: Mainz, Germany

PostPosted: Wed Jul 18, 2012 9:18 pm    Post subject: Reply with quote

Alternatively, you could use controllable compression and add the following code to /etc/portage/bashrc:
Code:
post_src_install() {
    case ${EAPI:-0} in
        0|1|2|3) ;;
        *) docompress -x /usr/share/info ;;
    esac
}

(Unfortunately, it will work for EAPI 4 only.)
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teika
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PostPosted: Wed Aug 08, 2012 9:29 am    Post subject: Reply with quote

Sorry, my last post to the Wiki page had a bug. I updated to a correct version. (The previous version left /usr/share/info.ecompress.dir for each package which install into /usr/share/info/ , resulting in file collision.)

# Anyway none complained, so none has tried, right? =P

@Sera and ulm: Thanks for your info.
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Hack of easy Shift / Ctrl / AltGr etc; save your pinkies, type without drudgery: topic 865313

XPAT - Xi, Putin, Abe and Trump - are security holes of their own nations.
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