Last year's stuff

bash_course/pres/pres.md

+---
+author:
+- Aline Abler
+title: Bash Workshop
+---
+
+# Overview
+
+## Table of Contents
+
+### What will we do today?
+
+* Theory
+    * What is bash?
+    * The basics
+* Exercises
+
+# What is bash?
+
+## Shells
+
+### Bash is a not a programming language.
+
+* It is a *shell*
+* It is an interface between you and your computer
+* It allows you to access the operating system’s services (i.e.
+    run programs)
+* *It is not designed as a programming language*, but can be used
+    as such
+
+### Bash is not the only shell there is.
+
+* sh, ksh, zsh, fish, dash...
+* Most commands work in any shell, but *some don’t*
+* Usually this doesn’t matter too much
+
+
+### Bash scripts are not programming
+
+* Glue existing programs together to create new ones
+* It’s possible to write entire programs, but please don’t
+
+# The basics
+
+## How to bash
+
+### Look, a bash script
+
+    # !/bin/bash
+
+    echo 'Hello World'
+
+    echo Bash is awesome
+
+    # Now some fun stuff:
+    sudo zypper update
+    notify-send 'Update complete'
+    feh --bg-fill 'pictures/fancy_wallpaper.jpg'
+    youtube-dl -o 'Video.%(ext)s' 'https://www.youtube.com/watch?v=lAIGb1lfpBw'
+
+### What bash can do
+
+* Automate anything you can do from a console
+* Let several separate programs work together
+
+
+## Strings
+
+### All about strings
+
+\bigtext{Everything is a string}
+
+### Strings and word splitting
+
+* A string is a sequence of characters that is *treated as a unit*
+* Commands are strings, too
+* Strings are split at every space, tab, or newline *unless they're in quotes*
+
+### Meaning of strings
+
+    echo Hello World
+
+* `echo`, `Hello` and `World` are single strings
+* The first string becomes the command, all following become
+    *arguments*
+
+<!-- -->
+
+    echo 'Hello World'
+
+* Here, `Hello World` is just one string
+
+### Repeat after me
+
+\bigtext{Every word is a single argument unless you use quotes.}
+
+## Commands
+
+### All about commands
+
+\bigtext{Everything that does something is a command}
+
+### Why is this so important?
+
+* *if* and *while* are commands
+* *\[\[* is a command
+
+### Example
+
+* wrong:
+
+        [[1==3]]
+
+* Bash's answer:        
+
+        bash: [[1==3]]: command not found
+
+* correct:
+
+        [[ 1 == 3 ]]
+
+### Repeat after me
+
+\bigtext{If there's brackets, you probably need spaces.}
+
+
+## All about return values
+
+### All about return values
+
+\bigtext{Every command returns a value}
+
+### Return values
+
+* Every command returns a number, its *return value*
+* 0 means success\
+    Everything else means there was an error
+* Some commands also print to *stdout* - that's what you see.
+
+
+### Return values
+
+* What you run
+
+        echo 'Hello World'
+
+* What you see
+
+        Hello World
+
+* What bash sees
+
+        0
+                        
+### Why is that important?
+
+* *&&*, *||*, *if* and *while* all act based on the return value of something
+* They *disregard that command’s actual output*
+
+### Example
+
+    if ls -l foo
+    then
+        echo 'File foo exists'
+    else
+        echo 'File foo does not exist'
+    fi
+
+## Expansion
+
+### Bash doesn’t only run commands
+
+* *Tilde expansion*\
+	 `~/files` becomes `/home/alinea/files`
+* *Variable expansion*\
+	 `$BROWSER` becomes `Firefox`
+* *Arithmetic expansion*\
+	 `$(( 1 + 4 ))` becomes `5`
+* *Command substitution*\
+	 `$( pwd )` becomes `/home/alinea/scripts`
+* *Pathname expansion* (or *globbing*)\
+	 `files/qui*` becomes `files/quicknotes files/quiz`
+
+### Bash doesn’t only run commands
+
+* Expansion happens before any command is run
+* Double quotes (") don't prevent expansion, but single quotes (') do.
+
+        $ echo "$HOME" '$HOME'
+        /home/alinea $HOME
+
+* Expansion happens *before word splitting*
+
+
+### The issue with word splitting
+
+    var='Unimportant File.odt'
+    rm $var  # Variable expansion
+
+becomes
+    
+    rm Unimportant File.odt
+
+### The issue with word splitting
+
+* The correct way
+
+        rm "$var"
+
+### Repeat after me:
+
+\bigtext{If there's a dollar, you probably need quotes!}
+
+# What bash is used for
+
+## The whole point of bash
+
+### Why is bash awesome?
+
+* Bash can easily invoke any programs and connect them
+* *Bash is like glue*
+
+## How to write a bash script
+
+### How to write a bash script
+
+* I want a script that searches youtube and downloads the first video it finds
+
+### Splitting it up
+
+* Search youtube
+* Download video
+
+### Google for a program that already does what you need
+
+* `youtube-dl` can download a video from youtube
+
+<!-- -->
+
+    youtube-dl -o 'Video.%(ext)s' 'https://www.youtube.com/watch?v=lAIGb1lfpBw' 
+
+### Splitting it up even further
+
+* Search youtube
+    * Download youtube results website
+    * Search website text
+    * Find first youtube video link
+* Download video
+
+# Your time to shine!
+
+## What happens now?
+
+### Hands on!
+#### Self-driven exercises
+* Self study using a guide
+* Try some of our exercises
+* Choose the exercises you find interesting! No need to go in order.
+
+#### Guided exercises
+* Solve easy exercises in plenum
+* Tailored to complete beginners
+* Please sit in the front
+
+### Course material
+* These slides, exercise sheet and bash guide: \
+    \soft{http://thealternative.ch/index.php?view=knowhow}
+* Please leave some feedback! \
+    \soft{http://feedback.thealternative.ch}
+
+<!-- -->
+
+* \soft{Theme by} Christian Horea, [CC BY](https://creativecommons.org/licenses/by/4.0/)

bash_course/pres/scripts/example

+#!/bin/bash
+
+echo Hello World
+
+echo Bash is awesome
+
+# Now some fun stuff:
+sudo zypper update
+notify-send "Update complete"
+feh --bg-fill "pictures/fancy_wallpaper.jpg"
+youtube-dl -o "Video.%(ext)s" "https://www.youtube.com/watch?v=lAIGb1lfpBw"
+

bash_course/pres/template.tex

+\documentclass[aspectratio=169,12pt]{beamer}
+\usepackage{lmodern}
+\usepackage[T1]{fontenc} %pipes don't display properly without this
+\usepackage[utf8]{inputenc}
+\usepackage{listings}
+\usepackage{color}
+\usepackage{datapie}
+\usepackage{multicol}
+\usepackage{siunitx} %pretty measurement unit rendering
+\usepackage{hyperref} %enable hyperlink for urls
+\usepackage{caption} % needed to tweak caption size
+
+\newcommand{\passthrough}[1]{#1}
+
+\usefonttheme[onlymath]{serif}
+\setcounter{MaxMatrixCols}{20}
+
+\DeclareSIUnit\pixel{px}
+
+\usecolortheme[RGB={37,68,113}]{structure}
+\usetheme{Dresden}
+
+\newenvironment{figurehere}
+{\def\@captype{figure}}
+{}
+\makeatother
+
+%commands to exclude sections from miniframes
+\makeatletter
+\let\beamer@writeslidentry@miniframeson=\beamer@writeslidentry
+\def\beamer@writeslidentry@miniframesoff{%
+   	\expandafter\beamer@ifempty\expandafter{\beamer@framestartpage}{}% does not happen normally
+   	{%else
+   		% removed \addtocontents commands
+   		\clearpage\beamer@notesactions%
+   	}
+}
+\newcommand*{\miniframeson}{\let\beamer@writeslidentry=\beamer@writeslidentry@miniframeson}
+\newcommand*{\miniframesoff}{\let\beamer@writeslidentry=\beamer@writeslidentry@miniframesoff}
+\beamer@compresstrue
+\makeatother
+
+
+\providecommand{\tightlist}{%
+  \setlength{\itemsep}{0pt}\setlength{\parskip}{0pt}}
+
+
+%various gray colors
+\definecolor{slg}{gray}{0.25}
+\definecolor{lg}{gray}{0.55}
+\definecolor{vlg}{gray}{0.73}
+\definecolor{tlg}{gray}{0.9}
+
+%TheAlt colors
+\definecolor{ldorange}{HTML}{F18A20}
+\colorlet{ldbright}{ldorange!70!white} % tinted version of orange, used in miniframes
+\definecolor{ldblue}{HTML}{254471}
+
+%%Theme colors
+%\definecolor{thgreen}{HTML}{A1A92C}
+%\definecolor{thmauve}{HTML}{97284D}
+
+%Theme colors
+\definecolor{thgreen}{HTML}{539727}
+\definecolor{thmauve}{HTML}{572272}
+
+%reduce caption font size:
+\captionsetup{font={scriptsize,color=lg}}
+
+%do not prepend numbering/lettering to figures/subfigures
+\captionsetup{labelformat=empty} %do not prepend letters to figure captions
+
+%Apply TheAlt colors to theme
+ % section titles in top navigation bar
+\setbeamercolor{section in head/foot}{parent=palette tertiary,fg=ldorange}
+\setbeamertemplate{section in head/foot shaded}{\color{ldbright}\usebeamertemplate{section in head/foot}}
+ % miniframes (little navigation circles)
+\setbeamercolor*{mini frame}{fg=ldorange,bg=ldbright}
+\setbeamertemplate{mini frame in other section}[default][0]
+\setbeamertemplate{mini frame in other subsection}[default][0]
+ % others
+\setbeamercolor{author in head/foot}{fg=white}
+\setbeamercolor{subsection in head/foot}{fg=white}
+\setbeamercolor{caption name}{fg=vlg}
+\setbeamercolor{caption}{fg=vlg}
+\setbeamercolor{frametitle}{fg=ldblue}
+
+\setbeamertemplate{caption}{\raggedright\insertcaption\par}
+\setbeamertemplate{navigation symbols}{}
+\setbeamertemplate{bibliography item}[text]
+
+\definecolor{mygreen}{rgb}{0,0.6,0}
+\definecolor{mygray}{rgb}{0.5,0.5,0.5}
+\definecolor{mymauve}{rgb}{0.58,0,0.82}
+
+\lstdefinestyle{custombash}{
+	belowcaptionskip=1\baselineskip,
+	captionpos=,
+	breaklines=true,
+	frame=L,
+	xleftmargin=\parindent,
+	language=bash,
+    morestring=[b]',
+    morekeywords=[2]{sudo,zypper,notify-send,feh,youtube-dl,sort,tee,head,tail,shuf,mpv,find,convert,xrandr,curl,wget,grep,xdotool,rm,cp,mv,touch,bash,chmod,mkdir,rsync,mplayer,mpv,xdotool,jshon},
+	showstringspaces=false,
+	basicstyle=\scriptsize\ttfamily,
+	rulecolor=\color{tlg},
+	backgroundcolor=\color{tlg},
+	fillcolor=\color{tlg},
+	rulesepcolor=\color{tlg},
+	commentstyle=\itshape\color{thmauve!60!black},
+    keywordstyle=\bfseries\color{thgreen},
+    identifierstyle=\color{ldblue},
+    stringstyle=\color{thmauve}
+}
+
+\lstset{
+    style=custombash,
+    caption={Descriptive Caption Text},
+    label=DescriptiveLabel
+}
+
+$if(title)$
+\title{$title$}
+$endif$
+$if(subtitle)$
+\subtitle{$subtitle$}
+$endif$
+$if(author)$
+\author{$for(author)$$author$$sep$ \and $endfor$}
+$endif$
+
+\institute{\includegraphics[width=0.35\textwidth]{img/logo_blue.pdf}}
+\date{$date$}
+
+\renewcommand{\emph}[1]{\textcolor{ldorange}{#1}}
+\let\oldtextbf\textbf
+\renewcommand{\textbf}[1]{\textcolor{ldorange}{\oldtextbf{#1}}}
+\newcommand{\soft}[1]{\textcolor{lg}{#1}}
+\newcommand{\textt}[1]{\textcolor{blue}{\texttt{#1}}}
+\newcommand{\bigtext}[1]{\centering\Huge \textbf{\textcolor{ldorange}{#1}}\normalsize}
+
+%shortcut to insert small logo in footline
+\def\logo{%
+	\resizebox{!}{3ex}{\includegraphics{img/logo_white.pdf}}
+}
+
+% Define a custom footline that includes our logo
+\setbeamertemplate{footline}
+{%
+	\begin{beamercolorbox}[wd=\paperwidth,ht=2.5ex,dp=1.125ex,%
+		leftskip=.3cm,rightskip=.3cm plus1fil]{title in head/foot}
+		\usebeamerfont{title in head/foot}%
+		\insertshorttitle\hfill\insertframenumber
+	\end{beamercolorbox}
+	\begin{beamercolorbox}[wd=\paperwidth,ht=3.5ex,dp=1.625ex,%
+		leftskip=.3cm,rightskip=.3cm plus1fil]{author in head/foot}
+		\usebeamerfont{author in head/foot}
+		\raisebox{0.5ex}{\insertshortauthor}\hfill\raisebox{-0.5ex}{\logo}
+	\end{beamercolorbox}
+}
+
+\begin{document}
+
+$if(title)$
+\frame{\titlepage}
+$endif$
+
+$for(include-before)$
+$include-before$
+
+$endfor$
+
+$if(toc)$
+\begin{frame}
+\tableofcontents[hideallsubsections]
+\end{frame}
+
+$endif$
+
+$body$
+
+$for(include-after)$
+$include-after$
+
+$endfor$
+
+\end{document}