teaching machines

CS 330 Lecture 3 – Make

January 30, 2015 by Chris Johnson. Filed under cs330, lectures, spring 2015.

Agenda

• what ?s
• what does this do?
• graph this
• capturing shell sequences with make

TODO

• Try out Ruby at http://tryruby.org.
• Watch a mini-documentary about Grace Hopper, creator of Cobol, one of the first high-level languages.
• Respond to these on a 1/4 sheet with 3-4 observations or questions.

What Does This Do?

1. #!/bin/sh
   
   if [ `uname` = "Darwin" ]; then
     clipboard=pbcopy
   else
     clipboard=xsel
   fi
   
   echo `pwd`/$1 | $clipboard

2. #!/usr/bin/env zsh
   
   id=$1
   vim $(grep -r -l $id *)

3. #!/usr/bin/env zsh
   
   if [[ $# -ne 1 ]]; then
     echo "Usage: $0 file" >&2
     exit 1
   fi
   
   f=$1
   say -f $f -o ${f:r}.aiff

Graph

Compose a graph showing the dependencies between the various files used to create a sign for Bring Your Pet to Class day:

• File footer.tex is created by running genfooter, which replaces all instances of EMAIL in footer.template with the contents of file email.
• File sign.pdf is created by running pdflatex on sign.tex, which includes footer.tex, header.tex, and mural.png.
• File header.tex is not generated, but edited manually.
• File mural.png assembles images[1-9].png into a mural using ImageMagick’s montage utility.

Represent each file as a node in your graph. Draw an edge from each file to its dependencies.

Code

email

petsday@uwec.edu

footer.template

Questions? Email #EMAIL.

genfooter

#!/bin/sh

email=`cat email`
sed -e "s/#EMAIL/$email/" footer.template

header.tex

Next Tuesday is Bring Your Pets to Class Day!

sign.tex

\documentclass{article}
\usepackage{graphicx}

\begin{document}
\Large
\begin{center}
\input{header}

\includegraphics[width=0.99\linewidth]{mural}

\input{footer}
\end{center}
\end{document}

makefile

Note to copy and pasters: makefile rules need to be indented with real tabs, not spaces.

sign.pdf: header.tex footer.tex mural.png sign.tex
  @echo "$@ is out-of-date. Newer: $?"
  pdflatex sign.tex

footer.tex: footer.template email genfooter
  @echo "$@ is out-of-date. Newer: $?"
  ./genfooter > footer.tex

mural.png: image1.png image2.png image3.png image4.png image5.png image6.png image7.png image8.png image9.png
  @echo "$@ is out-of-date. Newer: $?"
  montage -geometry '400x400+5+5>' -shadow $^ mural.png

Haiku