add joyous bash

.gitignore

@@ -1,4 +1,3 @@
 *.pdf
 *.epub
-Makefile
 *.xcf

Makefile

@@ -0,0 +1,19 @@
+help: ## Print the help message
+	$(info Make a single pdf by hitting the tab key a lot)
+	@awk 'BEGIN {FS = ":.*?## "} /^[0-9a-zA-Z._-]+:.*?## / {printf "\033[36m%s\033[0m : %s\n", $$1, $$2}' $(MAKEFILE_LIST) | \
+		sort | \
+		column -s ':' -t
+
+# Search should not include slides separated by '***', as those are for mdp, not pandoc.
+markdown != find slides/ -maxdepth 2 -type f -name "*.md" -exec grep -LF '***' '{}' ';'
+pdfs = $(patsubst %.md, %.pdf, $(markdown))
+
+$(pdfs): %.pdf: %.md
+	pandoc -t beamer -V theme:Warsaw -i $< -o $@
+
+.PHONY: pdfs
+pdfs: $(pdfs) ## Generate all pdfs (try `make -j pdfs`)
+
+.PHONY: clean
+clean: ## Delete all pdfs
+	$(RM) $(pdfs)

README.md

@@ -1,5 +1,20 @@
 # Radionice
 
-First run ./configure to generate a Makefile using folders in this directory
+Usage: `make`
+
+## Dependecies:
+
+### For Debian:
+
+```bash
+sudo apt update
+sudo apt install pandoc
+sudo apt install tikzit
+```
+
+### For Arch:
+
+```bash
+pacman -Sy pandoc texlive-binextra texlive-pictures texlive-latexrecommended texlive-fontsrecommended
+```
 
-Then you can run make to generate pdf beamer slides

configure

@@ -1,13 +0,0 @@
-#!/usr/bin/bash
-FOLDERS=$(cd slides/ ; echo *)
-
-rm -f Makefile
-echo -n 'all:' >> Makefile
-for i in $FOLDERS ; do echo -n " $i.pdf" >> Makefile ; done
-echo "" >> Makefile
-
-for i in $FOLDERS ; do echo -e "$i.pdf:\n\tpandoc -t beamer -V theme:Warsaw -i slides/$i/$i.md -o slides/$i/$i.pdf\n" >> Makefile ; done
-
-echo -ne "clean:\n\trm -f" >> Makefile
-for i in $FOLDERS; do echo -n " slides/$i/$i.pdf" >> Makefile ; done
-echo "" >> Makefile

slides/algebragrupe/algebragrupe.md

@@ -0,0 +1,65 @@
+---
+title:
+- Algebra (Grupe)
+
+theme:
+- Warsaw
+colortheme:
+- orchid
+---
+
+# Uvod
+- Skupovi
+    - Celi brojevi (beskonacni)
+    - Ostatci pre deljenju (konacne)
+- Operacije
+    - mnozenje (binarna)
+    - negacija (unarna)
+
+# Grupe
+- Rezlutat ostaje unutar skupa
+- Neutral
+- Inverz
+- Asocijativnost
+- Abelove grupe (komutativnost)
+- Ciklicne grupe (ostatak pri deljenju)
+
+# Podgrupe
+- Celi/Racionalni brojevi
+- Red grupe
+- Red podgrupe deli red grupe
+
+# Kriptografija
+- Skup poruka m odredjene velicine
+- Operacija sifrovanja/potpisivanja $\oplus$
+    - jednosmerna (kao i hash funkcije)
+- Neutral (e)
+- Inverz kljuceva (k1, k2)
+    - $k1 \oplus k2 \equiv e$
+- Sifrovanje/Potpisivanje ( $c \equiv m \oplus k1$ )
+- Desifovanje/Provera ( $c \oplus k2 \equiv m$ )
+- Asocijativnost
+    - $c \oplus k2 \equiv (m \oplus k1) \oplus k2 \equiv m \oplus (k1 \oplus k2)$
+    - $m \oplus (e) \equiv m$
+
+# Kljucevi
+- Jedan kljuc (simetricna)
+    - $k1 \equiv k2$
+    - $1 \oplus 1 \equiv 0 \mod 2$ (komplement)
+- Dva kljuca (asimetricna)
+    - $2+3 \equiv 0 \mod 5$
+
+# Razmena kljuceva
+![Diffie–Hellman](slides/rsa/dhke.png)
+
+# Razmena kljuceva
+- Diffie–Hellman (DH)
+    - parametri (g,n,...)
+    - Abelova grupa (komutativnost)
+    - $g \oplus a \oplus b \equiv g \oplus b \oplus a$
+    - $(g \oplus a) \oplus b \equiv (g \oplus b) \oplus a$
+    - $A \oplus b \equiv B \oplus a$
+
+# Sifrovanje/Potpisivanje
+- Direktno sifrovanje (RSA)
+- DH + simetcina = asimetricna (EC)

slides/ekonomija/ekonomija.md

@@ -10,13 +10,21 @@ colortheme:
 
 # Uvod
 - Šta je ekonomija?
+    - istorija
+    - trampa
+    - kovanice i papirni novac
+    - "slobodna" trgovina
 	- raspodela resursa
-	- efikasnost
+	- efikasnost i evektivnost
+
 
 # Uvod
 - Šta je novac?
+    - banke
+    - ponuda i traznja
 	- moć odlučivanja u raspodeli resursa
 	- likvidnost
+    - bruto domaci proizvod (BDP eng GDP)
 
 # Štednja
 - Štednja
@@ -47,6 +55,7 @@ colortheme:
 - Brokeri
 	- domaći
 	- strani
+    - wall street
 
 # Kripto
 - Novac
@@ -62,10 +71,33 @@ colortheme:
 	- iluzija sposobnosti
 	- zakoni
 
+# Uspesi sistema
+- Uspesi sistema
+ - brz napredak u poljima interesovanja (profita)
+ - masovna proizvodnja
+ - poslovi i obucavanje naroda
+ - 
+
+# Neuspesi i kritika sistema
+- Kritika
+   - planirano zastarevanje
+   - ciklicna potrosnja
+   - ekoloska katastrofa
+   - automatizacija
+   - besmisleni poslovi
+   - robovanje profitu
+   - kompetitivnost i ratovi
+   - sve na prodaju
+   - kriza u ciklusima
+   - najbogatijih 1%
+   - maltuzianizm
+
+
 # Kako da se obogatim?
 - Kako zaraditi?
-	- roditi se bogat
-	- krasti
+	- nasledstvo
 	- rad i štednja
+    - investicije
+    - kradja
 	- sreća
 

slides/extended_minds/extended_mind.md

@@ -1,62 +0,0 @@
----
-title:
-- The Extended Mind and Licensing
-author:
-- Malin
-
-theme:
-- Warsaw
-colortheme:
-- orchid
----
-
-# History
-
-- Started with Clark and Chalmers
-- [Chalmers at Ted](https://yt.artemislena.eu/watch?v=ksasPjrYFTg)
-
-## Cyborg Manifesto
-
-Or maybe Donna Haraway?
-
-# Original Extended Minds
-
-- Notebooks
-- Counting on fingers
-- Fil-o-fax
-
-# Electronic Extended Minds
-
-- Phones
-- Computers
-- Google?
-- Note-apps?
-
-# Intuition Pumps
-
-- Proprioception and teeth
-- The feeling of loss over theft
-- Second brains
-
-# Requirements
-
-- 'to-hand'
-- Repetition
-- Locus
-
-> Do you know where they live?
-
-# Counter Requirements
-
-> Skin and bone
-
-Does *Ghost in the Shell* count?
-
-# The Point and the Future
-
-![robocop](robocop_valuse.png)
-
-# End Notes
-
-> Can you code in the sand?
-

slides/extended_minds/extended_minds.md

@@ -54,7 +54,7 @@ Does *Ghost in the Shell* count?
 
 # The Point and the Future
 
-![robocop](robocop_valuse.png)
+![robocop](slides/extended_minds/robocop_values.png)
 
 # End Notes
 

slides/joyous_bash/joyous_bash.md

@@ -0,0 +1,243 @@
+# Shut Up!
+
+
+
+```sh
+echo blacklist pcspkr >  /etc/modprobe.d/nobeep.conf
+```
+
+---
+
+# Standard Visuals
+
+- `cbonsai`
+- `asciiquarium`
+- `top`
+    * `ZH4W`
+
+## Another Monday!
+
+- `cal --reform julian`
+
+## Weather
+
+```sh
+curl wttr.in
+curl -s wttr.in/Београд
+curl wttr.in/Moon
+```
+
+# `ls`
+
+`ls -X`
+
+---
+
+# vim
+
+- blog!
+- seriously, just write
+
+---
+
+# `watch`
+
+## Watch Differences
+
+- `watch -d stat "$file"`
+- `watch -d ip a`
+
+## With Makefiles
+
+```sh
+watch --chgexit ping -c 1 dmz.rs && sleep 3 && unison -batch pir
+```
+
+## Check Progress
+
+```sh
+watch 'ls **/*.pdf | column'
+```
+
+---
+
+# Watch Shell Scripts
+
+
+```sh
+watch -e ./script.sh
+```
+
+---
+
+# Slow Down
+
+```sh
+function slow(){
+	ff=/tmp/bashpipe_$(date +%s)
+	mkfifo $ff 2>/dev/null
+	( cat $ff | perl -We 'use Time::HiRes;$|++;while(read(STDIN,$c,1)){Time::HiRes::usleep(15000);print $c;}' )& exec &> $ff
+}
+
+```
+
+## Safety?
+
+- no
+
+## `htop`?
+
+- no
+
+## `speedtest`?
+
+- **YES**
+
+```
+
+---
+
+# Notes
+
+```sh
+alias no='$EDITOR .no.md'
+function n(){
+	[ -z "$1" ] && cat .no.md || echo $@ >> .no.md
+}
+
+```
+
+---
+
+# URL  Decoding
+
+
+```bash
+urldecode(){ : "${*//+/ }"; echo -e "${_//%/\\x}"; }
+```
+
+---
+
+# Send Text
+
+
+```sh
+function sendtext(){
+	[ -f "$1" ] && \
+	cat "$1" | nc termbin.com 9999 || \
+	echo "$($1)" | nc termbin.com 9999
+}
+```
+
+---
+
+# Readline
+
+
+Put this in `.inputrc`.
+
+```text
+set editing-mode vi
+set keymap vi
+```
+
+---
+
+# More Readline vi
+
+
+```text
+set editing-mode vi
+set show-mode-in-prompt on
+set vi-ins-mode-string "  "
+set vi-cmd-mode-string " "
+set keymap vi
+```
+
+---
+
+# More Readline
+
+```text
+
+set match-hidden-files off
+set show-all-if-ambiguous on
+set show-all-if-unmodified on
+set colored-stats on
+
+"\C- ": shell-expand-line
+"\C-x": glob-expand-word
+Control-g: "g\n"
+Control-y: "| ccze\n"
+Control-o: "\C-u lfcd\n\C-u"
+Control-l: "\C-u clear -x && ls\n"
+```
+
+---
+
+# Synchronization
+
+## Syncthing
+
+- 'Just works'
+
+## Unison
+
+- Fuck haskell
+- But actually it's good
+
+
+---
+
+# `column`
+
+```sh
+column -ts: -H PW,GID,shell -N User,PW,UID,GID,Description,Home,shell /etc/passwd
+```
+
+##
+
+```sh
+column -J -ts: -H PW,GID,shell -N User,PW,UID,GID,Description,Home,shell /etc/passwd | jq -r .table.[].user
+```
+
+---
+
+# Aliases
+
+## b
+
+```sh
+b () 
+{ 
+    eval "cd $(for d in $(seq 1 $1);
+do
+    printf ../;
+done)"
+}
+
+```
+
+---
+
+# `eval`
+
+- Don't
+
+---
+
+# Clear Downloads
+
+```sh
+rm -rf ~/Downloads/*
+echo "tmpfs $HOME/Downloads tmpfs defaults,size=1G 0 0" | sudo tee -a /etc/fstab
+sudo systemctl daemon-reload # Only for systemd
+sudo mount -a
+mount | tail -1
+```
+
+# The Best: `yes`
+
+- `yes`
+- `yes no`
+

slides/makefiles/PS/general_make.md

@@ -0,0 +1,119 @@
+# Generalizing Makefiles for All Occasions
+
+- Rules are bad,
+- standards are good,
+- habits are better.
+
+***
+
+# General Standards
+
+- `make help`
+- `make check`
+- `sudo make install`
+
+**NB:** we separate `make` from `make install` so that the files are not build with the user `root` as the owner.
+
+***
+
+# Service Standards
+
+- `make backup.tgz`
+- `make install`
+
+## Service Backups in Two Files
+
+- `configs`: configuration files, all tracked in git.
+- `store`: passwords and binary files, not tracked in git.
+
+## New Abilities Unlocked
+
+- Open Access Administration.
+- Sharing admin configs with hacker spaces.
+
+***
+
+## BEHOLD: The Everything Makefile
+
+***
+
+```make
+CONFIGS = $(patsubst /%,%,$(shell cat configs))
+STORE = $(patsubst /%,%,$(shell cat store))
+CP = mkdir -p $(dir $@) && cp -a
+IGNORE_FILE = $(shell test -d .git/info && echo .git/info/exclude || echo .gitignore)
+GIT_COMMIT = git commit -m"add $@" --no-gpg-sign --no-signoff
+SELECTOR != command -v sk || command -v fzy || command -f fzf
+.PHONY: all
+all: init backup.tgz $(IGNORE_FILE)
+backup.tgz: $(CONFIGS) $(STORE)
+	tar czf $@ $^
+$(IGNORE_FILE): store
+	echo $(STORE) backup.tgz | tr ' ' '\n' > $@
+.PHONY: init
+init: configs store
+configs store:
+	while con="$$(find /var /etc/ /sys/ -maxdepth 2 -mindepth 1 -type f 2>/dev/null  | $(SELECTOR) -p "Select files for $@\nPress Ctrl+d once done")"; do \
+	echo "$$con"; \
+	done > $@
+$(CONFIGS): %: /%
+	$(CP) $< $@
+	git add $@
+	$(GIT_COMMIT)
+	$(info made git commit for $@)
+$(STORE): %: /%
+	$(CP) $< $@
+clean:
+	$(RM) -r $(CONFIGS) $(STORE) backup.tgz
+```
+
+***
+
+## Example: Soft Serve Makefile
+
+<br>
+The `configs` file:
+
+```
+/etc/soft-serve.conf
+/var/lib/soft-serve/data/config.yaml
+/var/lib/soft-serve/data/file
+/etc/nginx/sites-enabled/soft.dmz.rs
+/etc/nginx/sites-available/soft.dmz.rs
+```
+
+<br>
+The `store` file:
+
+```
+/var/lib/soft-serve/data/lfs
+/var/lib/soft-serve/data/repo
+/var/lib/soft-serve/data/soft
+/etc/letsencrypt/archive/soft
+/etc/letsencrypt/live/soft.dm
+/var/lib/soft-serve/data/ssh/
+```
+
+***
+
+# Other Build Systems
+
+> "*What if I want to use this other thing, instead of a makefile?"
+
+***
+
+# Other Build Systems (Sans Heresy)
+
+> "*What if I want to use this other thing, instead of a makefile?"
+
+- Easy: just use a Makefile.
+
+
+```make
+
+[ ... ]
+
+public/: src/
+    python build_pages.py
+```
+

slides/makefiles/PS/omni_makefile

@@ -0,0 +1,34 @@
+CONFIGS = $(patsubst /%,%,$(shell cat configs))
+STORE = $(patsubst /%,%,$(shell cat store))
+CP = mkdir -p $(dir $@) && cp -a
+IGNORE_FILE = $(shell test -d .git/info && echo .git/info/exclude || echo .gitignore)
+GIT_COMMIT = git commit -m"add $@" --no-gpg-sign --no-signoff
+SELECTOR != command -v sk || command -v fzy || command -f fzf
+
+.PHONY: all
+all: init backup.tgz $(IGNORE_FILE)
+
+backup.tgz: $(CONFIGS) $(STORE)
+	tar czf $@ $^
+
+$(IGNORE_FILE): store
+	echo $(STORE) backup.tgz | tr ' ' '\n' > $@
+
+.PHONY: init
+init: configs store
+
+configs store:
+	while con="$$(find /var /etc/ /sys/ -maxdepth 2 -mindepth 1 -type f 2>/dev/null  | $(SELECTOR) -p "Select files for $@\nPress Ctrl+d once done")"; do \
+	echo "$$con"; \
+	done > $@
+
+$(CONFIGS): %: /%
+	$(CP) $< $@
+	git add $@
+	$(GIT_COMMIT)
+	$(info made git commit for $@)
+$(STORE): %: /%
+	$(CP) $< $@
+
+clean:
+	$(RM) -r $(CONFIGS) $(STORE) backup.tgz

slides/makefiles/dependency_ladder/.gitignore

@@ -0,0 +1 @@
+*

slides/makefiles/dependency_ladder/makes/books

@@ -0,0 +1,16 @@
+MONTHS != date +%B && date -d '1 month' +%B
+IP != dig +short myip.opendns.com @resolver1.opendns.com
+CITY != curl -s http://api.db-ip.com/v2/free/$(IP) | grep city | cut -d: -f2 | tr -d '"'
+
+TITLES = $(MONTHS)
+TITLES += $(CITY)
+
+BOOKS = $(patsubst %,Books/%.md,$(TITLES))
+
+$(BOOKS):
+	@mkdir -p $(@D)
+	fortune -l > $@
+
+progs += $(BOOKS)
+
+dross += Books/

slides/makefiles/dependency_ladder/makes/cows

@@ -0,0 +1,10 @@
+cows = $(patsubst Forts/fortune_%.md,Cows/cow-%.txt,$(wildcard Forts/fortune_*.md))
+
+$(cows): Cows/cow-%.txt: Forts/fortune_%.md
+	@mkdir -p $(@D)
+	cat $< | cowsay > $@
+
+progs += forts
+progs += $(cows)
+dross += Cows/
+

slides/makefiles/dependency_ladder/makes/forts

@@ -0,0 +1,11 @@
+
+fnums != seq 8 | sort -R | head -2
+forts = $(patsubst %,Forts/fortune_%.md,$(fnums))
+
+$(forts):
+	@mkdir -p $(@D)
+	fortune -s > $@
+
+progs += $(forts)
+
+dross += Forts/

slides/makefiles/dependency_ladder/makes/zoo

@@ -0,0 +1,14 @@
+filter = $(shell cowsay -l | sort -R | head -1)
+
+zoo = $(patsubst Forts/fortune_%.md,Zoo/animal-%.md,$(forts))
+
+$(zoo): Zoo/animal-%.md: Forts/fortune_%.md
+	@mkdir -p $(@D)
+	echo '```' > $@
+	cat $< | cowsay -f $(filter) >> $@
+	echo '```' >> $@
+
+progs += forts
+progs += $(zoo)
+
+dross += Zoo/

slides/makefiles/examples/.gitignore

@@ -0,0 +1 @@
+*

slides/makefiles/examples/check

@@ -0,0 +1,8 @@
+CHECKER = command -v
+.PHONY: check
+check:
+	$(CHECKER) fortune >/dev/null
+	$(CHECKER) cowsay >/dev/null
+
+file: | check
+	fortune | cowsay > $@

slides/makefiles/examples/fort_1

@@ -0,0 +1,13 @@
+
+forts/big_fort.txt: forts/short.txt forts/long.txt
+	cat forts/short.txt forts/long.txt > forts/big_fort.txt
+
+forts/:
+	mkdir forts
+
+forts/short.txt: forts/
+	fortune -s > forts/short.txt
+
+forts/long.txt: forts/
+	fortune -l > forts/long.txt
+

slides/makefiles/examples/fort_2

@@ -0,0 +1,21 @@
+
+forts/big_fort.txt: forts/short.txt forts/long.txt
+		cat $^ > $@
+
+README.md:
+	echo "For an example makefile for python" > $@
+	echo "check out the nd6 dice-roller at" >> $@
+	echo "ssh -p 2222 soft.dmz.rs -t nd6" >> $@
+
+
+forts/: README.md
+	mkdir -p $@
+
+forts/short.txt: forts/
+	fortune -s > $@
+
+forts/long.txt: forts/
+	fortune -l > $@
+
+clean:
+	rm -rf forts

slides/makefiles/examples/omni_makefile

@@ -0,0 +1 @@
+../PS/omni_makefile

slides/makefiles/examples/pats

@@ -0,0 +1,18 @@
+IMAGES = $(wildcard jpgs/*)
+COL = $(patsubst jpgs/%,collection/%,$(IMAGES))
+
+.PHONY: help
+help:
+	$(info try 'show' or 'output')
+.PHONY: show
+show:
+	$(info IMAGES is $(IMAGES))
+	$(info Col is $(COL))
+
+.PHONY: output
+output: $(COL)
+
+collection/%.jpg: jpgs/%.jpg
+	mkdir -p $(@D)
+	cp $< $@
+

slides/makefiles/examples/rules

@@ -0,0 +1,15 @@
+CP = ln -f
+
+output: pngs/ldap.png
+
+jpgs/ldap.jpg: ../../ldap/ldap.jpg
+	mkdir -p $(dir $@)
+	$(CP) $< $@
+
+pngs/%.png: jpgs/%.jpg
+	mkdir -p $(dir $@)
+	$(info making $(@F) in $(@D))
+	magick $< $@
+
+clean:
+	$(RM) -r pngs jpgs

slides/makefiles/examples/vars

@@ -0,0 +1,10 @@
+include /etc/os-release
+DAY != date +%d
+MESSAGE != fortune -s
+
+motd_$(DAY):
+	$(info Hello $(USER))
+	$(info Placing message:)
+	echo "Welcome to $(NAME)" > $@
+	echo $(MESSAGE) >> $@
+

slides/makefiles/makefiles.md

@@ -0,0 +1,13 @@
+---
+title:
+- Making Makefiles
+author:
+- Malin
+
+theme:
+- Warsaw
+colortheme:
+- orchid
+---
+
+(presentation in presentation.md)

slides/makefiles/presentation.md

@@ -0,0 +1,314 @@
+# Intro
+
+The fundamental problem:
+
+```bash
+git submodule update --init soundscape
+cargo build --release
+install -pm755 target/release/tap /usr/local/bin/
+```
+
+*But you can't type this for each run.*
+
+***
+
+## First Solution
+
+```bash
+#!/bin/sh
+git submodule update --init soundscape
+cargo build --release
+install -pm755 target/release/tap /usr/local/bin/
+```
+
+At this point, every test takes 10 minutes.
+
+## Second Solution
+
+```bash
+#!/bin/sh
+[ -f soundscape/.git ] || git submodule update --init soundscape
+[ -f target/release/tap ] || cargo build --release
+[ -f target/release/tap ] || \
+    install -pm755 target/release/tap /usr/local/bin/
+```
+
+***
+
+# Makefile Solutions
+
+- input, process, output.
+- automatic idempotence
+
+```bash
+INSTALL_DIR = /usr/local/bin
+
+soundscape/.git:
+    git submodule update --init soundscape
+
+/usr/local/bin/tap: target/release/tap
+	install -pm755 target/release/tap $(INSTALL_DIR)
+
+target/release/tap: src soundscape/.git
+	cargo build --release
+```
+
+***
+
+# The Three Sigils
+
+Readable, but slow:
+
+```make fort_1
+forts/big_fort.txt: forts/short.txt forts/long.txt
+	cat forts/short.txt forts/long.txt > forts/big_fort.txt
+
+forts/:
+	mkdir forts
+
+forts/short.txt: forts/
+	fortune -s > forts/short.txt
+
+forts/long.txt: forts/
+	fortune -l > forts/long.txt
+```
+
+***
+
+| Make this | From That | From These |
+|:---------:|:---------:|:----------:|
+|  `$@`     |  `$<`     |   `$^`     |
+
+
+```make fort_2
+forts/big_fort.txt: forts/short.txt forts/long.txt
+		cat $^ > $@
+
+forts/: README.md
+	mkdir $@
+forts/short.txt: forts/
+	fortune -s > $@
+forts/long.txt: forts/
+	fortune -l > $@
+```
+
+***
+
+# Gotcha: Directories
+
+
+```make fort_2
+forts/big_fort.txt: forts/short.txt forts/long.txt
+		cat $^ > $@
+
+forts/: README.md
+	mkdir $@
+forts/short.txt: forts/
+	fortune -s > $@
+forts/long.txt: forts/
+	fortune -l > $@
+
+README.md:
+    echo "Find the fortunes in the fort dir" > $@
+```
+
+***
+
+# Variables
+
+```make vars
+include /etc/os-release
+DAY != date +%d
+MESSAGE != fortune -s
+
+motd_$(DAY):
+	$(info Placing message:)
+	echo "Welcome to $(NAME)" > $@
+	echo $(MESSAGE) >> $@
+```
+
+### Gotcha: Hanging Quotes
+
+> echo "Welcome to "Arch Linux""
+
+***
+
+## Add New Variables
+
+```make
+make -f vars -e MESSAGE="Red alert, all hands on deck!"
+```
+
+### Gotcha: Quote, or Risk Escape
+
+```make
+make -f vars -e MESSAGE="<h1> HTML Headers </h1>"
+```
+
+***
+
+# Gotcha: Variables from Shell
+
+This works:
+
+```make
+file:
+    $(info Hello $(USER))
+```
+
+...but not this:
+
+```make
+file:
+    user=bob
+    echo $user
+```
+
+Nor this:
+
+```make
+numbers:
+    for x in 1 2 3 4 5; do
+        echo $x
+    done > $@
+```
+
+Nor this:
+
+```make
+numbers:
+    for x in 1 2 3 4 5; do echo $x ; done > $@
+```
+
+***
+
+### Ugly Fixes are Ugly
+
+This works, but don't.
+
+```make
+file:
+	for x in 1 2 ;\
+			do echo $$x ;\
+	done > $@
+```
+
+***
+
+
+# Phonies, and the Problems with Lies
+
+## Clean
+
+
+```make
+.PHONY: clean
+clean:
+    git clean -fdX
+```
+
+## Gotcha: Recompiling without Changes
+
+```make
+CHECKER = command -v
+.PHONY: check
+check:
+	$(CHECKER) fortune >/dev/null
+	$(CHECKER) cowsay >/dev/null
+
+file: check # Needs a '|'
+	fortune | cowsay > $@
+```
+
+***
+
+
+## Non-Compiling Checks
+
+- `make` -n
+- *Gotcha*: shell output variables.
+
+***
+
+
+# The Fourth Sigil: `%`
+
+Create standardized rules with `%`.
+
+
+```make rules
+CP = ln -f
+
+output: pngs/ldap.png
+
+jpgs/ldap.jpg: ../../ldap/ldap.jpg
+	mkdir -p $(dir $@)
+	$(CP) $< $@
+
+pngs/%.png: jpgs/%.jpg
+	mkdir -p $(dir $@)
+	$(info making $(@F) in $(@D))
+	magick $< $@
+```
+
+***
+
+# Bling: makefile2graph
+
+```graph
+
+┌────────────────┐     ┌────────────────────┐
+│ forts/long.txt │ ◀── │       forts/       │
+└────────────────┘     └────────────────────┘
+  │                      │
+  │                      │
+  │                      ▼
+  │                    ┌────────────────────┐
+  │                    │  forts/short.txt   │
+  │                    └────────────────────┘
+  │                      │
+  │                      │
+  │                      ▼
+  │                    ┌────────────────────┐
+  └──────────────────▶ │ forts/big_fort.txt │
+                       └────────────────────┘
+```
+
+### Gotcha: The Binary is Called `make2graph`
+
+- Works with GUI tools maybe, IDK, I don't use Windows.
+- Some systems can use `graph-easy`, but it's outdated.
+
+***
+
+# Patsubst and Wildcards
+
+
+```make pats
+IMAGES = $(wildcard jpgs/*)
+COL = $(patsubst jpgs/%,collection/%,$(IMAGES))
+
+.PHONY: show
+show:
+	$(info IMAGES is $(IMAGES))
+	$(info Col is $(COL))
+
+.PHONY: output
+output: $(COL)
+
+collection/%.jpg: jpgs/%.jpg
+	mkdir -p $(@D)
+	cp $< $@
+
+```
+
+***
+
+# Use Cases
+
+- Backups
+- Making Websites
+    * `git clone https://gitlab.com/bindrpg/blag`
+- `NOT installations`
+    - ...but maybe installations?
+- Setting

slides/stajedecentrala/stajedecentrala.md

@@ -33,7 +33,8 @@ Ekipa koju interesuje :
 
 # Lokacije
 
-- DC Krov hacklab
-- KC Grad radionce
-- Matematicki Faklutet (cekamo)
-- Drugi fakulteti, skole?
+- DC Krov
+- KC Magacin
+
+# Kontakt
+![qrcode](slides/stajedecentrala/qrcode.png)