Pre/Post emerge commands

Message

s0be · Post by **s0be** » Wed May 30, 2012 5:33 am

Is there any built in facility to have emerge run a script/command when a emerge is starting/finishing?

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Back story: I have a poorly designed lenovo w510 that overheats. While I battle with Lenovo about getting it repaired (again and again and again), I've found that forcing the fan on full while compiling remedies the problem. Unfortunately, I often forget to do so, which can lead to unexpected shutdowns. I've modified my non portage related build stuffs to handle this automatically, but before 'kludging' this the same way, I figured I check to make sure I hadn't missed such a feature, and if not, would attempt to implement it.

ppurka · Post by **ppurka** » Wed May 30, 2012 5:42 am

Maybe through /etc/portage/bashrc:

http://www.gentoo-wiki.info/TIP_The_/et ... ashrc_file
http://www.funtoo.org/wiki/Portage's_bashrc

There could be other ways. But I can't recall them as of now.

ppurka · Post by **ppurka** » Wed May 30, 2012 5:54 am

I forgot.. if you use my script (which has only one argument of its own "--help" and passes everything on to emerge), then you can define a post and pre command in the config file. See my sig below for the script and see this README for more information on the post and pre commands.

s0be · Post by **s0be** » Wed May 30, 2012 6:20 am

Thanks for the bashrc pointer. I was able to achieve what I needed with:

Code: Select all

eecho() {
        [ "$NOCOLOR" = "false" ] && echo -ne '\e[1;34m>\e[1;36m>\e[1;35m>\e[0m ' || echo -n ">>> "
        echo "$*"
}

pre_src_compile() {
  eecho "Ramping up fans"
  echo level full-speed > /proc/acpi/ibm/fan
}

post_src_compile() {
  eecho "Returning fans to auto"
  echo level auto > /proc/acpi/ibm/fan
}

in bashrc, and adding:

Code: Select all

#needed to add fan magic
SANDBOX_WRITE="/proc/acpi/ibm/fan"

to /etc/sandbox.conf

That's elegant enough for me.