Intro

Sage may be available on your distro but on Gentoo such frivolities for students are not there yet, so I had to install it the manual way.

User

I went to the Sage website, to the "download-source" link. The source mirror I picked was France.

Ok, so let's follow Sage Math build instructions and get it going

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wget www-ftp.lip6.fr/pub/math/sagemath/src/sage-9.2.tar.gz
tar xvf sage-9.2.tar.gz
cd sage-9.2
./configure
make

And now, let's wait…

Portage

After a long, long, long time waiting I remembered that there existed a Gentoo overlay for Sage. And in the meantime I thought I'd try that solution instead since some good Gentoo people already did most of the effort.

Just a few files to edit…

File: /etc/portage/repos.conf/sage-on-gentoo.conf

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# -*- conf -*-


[sage-on-gentoo]

auto-sync = yes
location = /var/db/repos/sage-on-gentoo
priority = 999
sync-git-clone-extra-opts = --depth=999999999 --no-shallow-submodules --verbose
sync-git-pull-extra-opts = --verbose
sync-type = git
sync-umask = 022
sync-uri = https://github.com/cschwan/sage-on-gentoo.git
sync-user = root:portage

File: /etc/portage/package.accept~keywords~/zz-sage

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# -*- conf -*-


sci-mathematics/sage                    **

*/*::sage-on-gentoo

dev-python/cvxopt

media-gfx/tachyon

sci-libs/bliss
sci-libs/dsdp
sci-libs/fflas-ffpack
sci-libs/fplll
sci-libs/libhomfly
sci-libs/linbox
sci-libs/m4rie

sci-mathematics/glpk

File: /etc/portage/package.use/zz-sage

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# -*- conf -*-


sci-mathematics/sage                    -doc-html -doc-html-bin
sci-mathematics/sage                    -doc-pdf -doc-pdf-bin
sci-mathematics/sage                    -jmol
sci-mathematics/sage                    X bliss meataxe

dev-python/pplpy                        doc

sci-libs/cddlib                         tools
sci-libs/pynac                          -giac

sci-mathematics/eclib                   flint
sci-mathematics/flint                   ntl
sci-mathematics/glpk                    gmp
sci-mathematics/gmp-ecm                 -openmp
sci-mathematics/lcalc                   pari
sci-mathematics/maxima                  ecls
sci-mathematics/pari                    gmp doc

Now - let's build Sage with Portage!

>>> Emerging (1 of 100) sci-mathematics/cliquer–1.21::gentoo

At least I know more or less how long I'm going to wait and know what exactly fails to build, if anything does.

Final

Build

$ qlop -tv sage

> 2021–03–23T20:49:12 >>> sci-mathematics/sage–9999: 55′04″

Git stats

Overlays

This info we can easily gather with executing:

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emerge --info

Gentoo' HEAD: 33f2d770c28307b1e9a1199c681e1c543602c6d4

Sage-on-Gentoo's HEAD: f7eac5b7e1a844132164b7593dab85cd87918664

Sage

Sage repository's HEAD (because we are using the live (9999) ebuild):

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cat /var/cache/distfiles/git3-src/sagemath_sage.git/refs/heads/develop

Which returns: 5cb72aade9b297c10bb0f1ae8529466e5b5eb41d

Story

In 2013–2017 I was very interested in Trading card game “Magic: the Gathering”. I started playing during the release of Theros and quit somewhere during Shadows over Innistrad. I still keep a small collection of alternative artwork that I have painted on the cards.

Binder

Those are pages from the binder I store the card in. Also a lone “Obsession” resource card from The Spoils.

• Page 1
  
• Page 2
  
• Page 3
  

Cards

This list is sorted by the time I created the alter-art. I do this from memory so it’s probably not accurate.

• Swamp v1
  
  • spider over card, the first alter I’ve made
• Swamp v2
  
  • re-imagining of Urborg, Tomb of Yawgmoth
• Force Spike v1
  
  • extended cape, head explosion
• Lava Axe
  
  • inspired by Football game from the Room
• Force Spike v1
  
  • blood fountain from head
• Forest v1
  
  • rose
• Balustrade Spy
  
  • inspired by Romeo & Juliet
• Duress v1
  
  • inspired by the Passion of Jesus Christ
• Gray Merchant of Asphodel
  
  • re-imagination as Zombie servant
• Sign in Blood
  
  • Yawgmoth’s Bargain pastiche
• Unsummon
  
  • extended art
• Assassinate
  
  • inspired by Time Spiral block block style, e.g. Yixlid Jailer
• Worst Fears
  
  • inspired by Terror
• Duress v2
  
  • extended art
• Duress v3
  
  • inspired by Brainstorm
• Swamp v3
  
  • Mox Jet pastiche
• Forest v2
  
  • Mox Emerald pastiche
• Plains
  
  • Mox Pearl pastiche
• Negate
  
  • extended art, melting person
• Consume Spirit
  
  • extended art
• Merciless Resolve
  
  • extended art with sharpie
• Duress v4
  
  • inspired by Gitaxian Probe, the last alter I’ve made

I has decentralization

So, yea, I’m on Fosstodon. https://fosstodon.org/@xgqt

Hope I don’t get banned ;^)

But in all seriousness, it’s been pretty great. My colleagues warned me that there’s a lot of SJWs but only one person I spoke with wanted to be addressed “differently” + didn’t express that aggressively, so whatever.

Se yall on mastodon ;D

Git

Because contents of this blog are stored in a git repository you can just

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git clone --verbose --recursive https://gitlab.com/xgqt/blog

then, read the "raw" ORG files in 'posts' directory or make the HTML version executing the 'dev.sh' script (remember that you will need GNU Emacs to render the posts into HTML files).

Then, you can just git pull to read the news whenever you wish, maybe do it with cron or a script that will pull many repos at once, for example with this script.

RSS

Org-Static-Blog creates a RSS Feed file rss.xml, so to subscribe add the link https://xgqt.gitlab.io/blog/rss.xml to your favorite RSS reader.

You can also subscribe to the GitLab repository Atom feed.

Short story long

We were discussing some vulnerabilities on the src~prepare~ group's [matrix] channel and when we're talking about systemd errors. I just felt like opening their GitHub and browsing the code. I was just reading the comments… and I saw a comment about kernel APIs and there a emoji. My feeling is probably best expressed my common "KEK". I chuckled. The "Abstract" in 0.0.1 is the original idea I typed on [matrix]. The funniest part of this "development" for me is probably that Emacs on my system doesn't display properly ANY of the emojis in emojid. I had to go back and forth between the source and log files opened in FF (because it renders the emojis properly), emojipedia and "broken" Emacs.

0.0.1 "😃 ️ 🌍 🍞 🚗 📞 🎉 ♥️ 🏁"

What you do is clone the repository, execute make and run the binary. Read your log and see if your system is "affected" :P.

👋

And remember emoticons made of the symbols found on the keyboard will always look better ;)

Recap

What I did this year:

• began studying at WSIiZ
• drank a lot of alcohol with friends
• installed NetBSD ;)
• learned Nginx and Ansible
• recruited new people to the src_prepare group
• struck a nerve with some commies
• took maintainership of gallery-dl and PPSSPP
• tweaked my configs
• went back to KDE and Firefox (missed them)
• worked with Zigbee (probably not doing that again)

Wishes

What do you wish in new year?

I wish you all merry Christmas and happy new year. Less bugs, more resolved issues, no wontfixes, better compatibility. Faster compilation, less failures. And of course no lawsuits, no copyright infringements and better government.

Intro

Backing up using this method takes a lot less space - ~60MB (without distfiles) and can be restored on almost any system (running portage) and tweaked afterwards for, say, CPU architecture. I've created a a short script with similar method in here.

What we need

• ebuild repositories are installed with git
• distfiles (those might be gone when we want to replicate)

Backup

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# System info
emerge --info > info.txt

# Portage tree
cp -Lr /etc/portage .

# Portage layout
tree -a -L 2 /etc/portage > layout.txt

# Packages in @world
cp /var/lib/portage/world .

# Installed sets
cp /var/lib/portage/world_sets .

# Installed packages (with versions)
qlist --installed --nocolor --umap > qlist-use.txt
qlist --installed --nocolor --verbose > qlist-ver.txt

# Distfiles
cp -rv "$(portageq envvar DISTDIR)" distfiles

# Ebuild database
cp -r /var/db/pkg pkgdb

Restoration

To faithfully restore the system perform those actions as root

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# Copy the portage tree to /etc
rm -dr /etc/portage
cp -r portage /etc/portage

# Checkout the gentoo repo to a commit specified in info.txt
cd "$(portageq get_repo_path / gentoo)"
git checkout # <commit ID>

# Copy distfiles
cp -r distfiles/* "$(portageq envvar DISTDIR)"/

# Fake-install @world and sets
cp world /var/lib/portage/world
cp world_sets /var/lib/portage/world_sets

# Emerge the exact packages from qlist-ver.txt
emerge --keep-going=y -1Oav $(sed 's/^/=/' qlist-ver.txt)