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compile world [bash script]
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cyberjun
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Joined: 06 Nov 2005
Posts: 290

PostPosted: Thu Sep 29, 2011 6:47 am    Post subject: compile world [bash script] Reply with quote

Hi,
I have put together a short script for compiling the entire tree (prompted by the latest gcc 4.5.3-r1 stabilization) at your leisure. It stops and prompts after compiling 10 packages and shows the list of next 10 packages which will be compiled. It exits if it encounters an error while compilation.

It is for people using gentoo on laptops like me. The aim is to give you a chance to pause the compilation mid way and resume when you can.
It may be redundant for most people as emerge --resume can very well take care of things. Although the script is not very refined or robust, I hope it will be helpful for some people.

To prepare the input file, following steps can be used:
Quote:
1. emerge -pve world > temp1.txt
2. Edit the file in an editor and remove initial and last 6 lines so that only actual package names remain on each line.
3. cat temp1.txt | cut -d']' -f2 | cut -d' ' -f2 > temp.txt

I have not used equery list '*' because the above approach preserves the build order. Please note that this script does not automate the complete gcc upgrade process. It just helps in the "compile world" part. Please follow the gcc upgrade guide if you are upgrading to new gcc version.

Script follows:
Quote:
#!/bin/bash

if [ -a "/root/compile_done.txt" ]; then
count=`cat /root/compile_done.txt`;
else
count=0;
fi

startfrom=$((count+1));

for atom in $(tail -n +$startfrom temp.txt);
do
echo 'emerge -av1 ='$atom;
emerge -v1 =$atom;
if [ $? -eq 0 ]; then
count=$((count+1));
echo $count > /root/compile_done.txt;
else
exit;
fi
modulo=$((count % 10));
echo $modulo;
if [ $modulo -eq 0 ]; then
echo $count
show=$((count+1));
tail -n +$show temp.txt | head
read -p "Press any key to continue..." -n1 -s;
else
continue;
fi
done
echo $count


--cyberjun
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ppurka
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Joined: 26 Dec 2004
Posts: 3206

PostPosted: Thu Sep 29, 2011 4:19 pm    Post subject: Reply with quote

Can you not run the compilation in screen and then Ctrl-z to pause the compilation? Later when you want to resume you could simply use fg. If you want to close down your terminal, you could detach screen by using Ctrl-a d and later reattach it by using screen -r.
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cyberjun
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Joined: 06 Nov 2005
Posts: 290

PostPosted: Thu Sep 29, 2011 4:23 pm    Post subject: Reply with quote

Yes. Thats right. However pausing and resuming a particular compilation messes up compile time logs in qlop -tH output :(

This way I can pause between every 10 emerges without affecting qlop.

--cyberjun
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John R. Graham
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Joined: 08 Mar 2005
Posts: 7840
Location: Somewhere over Atlanta, Georgia

PostPosted: Thu Sep 29, 2011 7:24 pm    Post subject: Reply with quote

Moved from Portage & Programming to Documentation, Tips & Tricks.

- John
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steveL
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Joined: 13 Sep 2006
Posts: 2717
Location: The Peanut Gallery

PostPosted: Fri Oct 07, 2011 3:54 pm    Post subject: Reply with quote

Your basic loop of emerging one package at a time in the list is what update started out doing, and still does unless you're using multiple jobs, although it was also designed to filter the output from single emerge's (which was only kind when we started.) It's a much larger script nowadays of course.

You can type update --stop while one is running, from another terminal (or same one if you've backgrounded the first update) to make it stop after the current package. (Running just update will ask you if you want the running one to stop after current package.) This means you can pause at any time you like while not losing any work.

Or you can just hit CTRL-C if you want it to bail out immediately (which will mean current package will have to be restarted.)

In either case, you can resume with update -r which historically has been more reliable than lower-level emerge --resume.
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