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01/02: talks: Add Rennes talk.


From: Ludovic Courtès
Subject: 01/02: talks: Add Rennes talk.
Date: Tue, 10 Nov 2015 09:48:55 +0000

civodul pushed a commit to branch master
in repository maintenance.

commit 27f5095562e7395dc1d430d07de190a2c566118b
Author: Ludovic Courtès <address@hidden>
Date:   Mon Nov 9 23:52:03 2015 +0100

    talks: Add Rennes talk.
---
 .gitignore                                         |    9 +
 .../rennes-2015/20150131-fosdem-distros-boring.pdf |  Bin 0 -> 2501826 bytes
 talks/rennes-2015/images/GuixSD.pdf                |  Bin 0 -> 9429 bytes
 talks/rennes-2015/images/better.png                |  Bin 0 -> 14473 bytes
 talks/rennes-2015/images/ci-jenkins-cropped.png    |  Bin 0 -> 54318 bytes
 talks/rennes-2015/images/ci-jenkins.png            |  Bin 0 -> 94990 bytes
 .../images/debian-upgrade-instructions.png         |  Bin 0 -> 100982 bytes
 .../rennes-2015/images/debian-upgrade-warning.png  |  Bin 0 -> 54599 bytes
 talks/rennes-2015/images/docker-security.png       |  Bin 0 -> 260587 bytes
 talks/rennes-2015/images/gnunet-graph.dot          | 1015 ++++++++++++++++++++
 talks/rennes-2015/images/hope-hero.jpg             |  Bin 0 -> 114234 bytes
 .../images/package-managers-cropped.png            |  Bin 0 -> 67606 bytes
 talks/rennes-2015/images/package-managers.png      |  Bin 0 -> 109674 bytes
 talks/rennes-2015/my-software.scm                  |    6 +
 talks/rennes-2015/outline.org                      |  135 +++
 talks/rennes-2015/rules.ini                        |    1 +
 talks/rennes-2015/talk.tex                         |  769 +++++++++++++++
 talks/reppar-2015/rules.ini                        |    2 +-
 18 files changed, 1936 insertions(+), 1 deletions(-)

diff --git a/.gitignore b/.gitignore
index a305ed3..e429cc6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -31,3 +31,12 @@
 /talks/reppar-2015/talk.snm
 /talks/reppar-2015/talk.toc
 /talks/reppar-2015/talk.vrb
+/talks/rennes-2015/images/gnunet-graph.pdf
+/talks/rennes-2015/talk.aux
+/talks/rennes-2015/talk.log
+/talks/rennes-2015/talk.nav
+/talks/rennes-2015/talk.out
+/talks/rennes-2015/talk.pdf
+/talks/rennes-2015/talk.snm
+/talks/rennes-2015/talk.toc
+/talks/rennes-2015/talk.vrb
diff --git a/talks/rennes-2015/20150131-fosdem-distros-boring.pdf 
b/talks/rennes-2015/20150131-fosdem-distros-boring.pdf
new file mode 100644
index 0000000..7672467
Binary files /dev/null and 
b/talks/rennes-2015/20150131-fosdem-distros-boring.pdf differ
diff --git a/talks/rennes-2015/images/GuixSD.pdf 
b/talks/rennes-2015/images/GuixSD.pdf
new file mode 100644
index 0000000..52c2cfa
Binary files /dev/null and b/talks/rennes-2015/images/GuixSD.pdf differ
diff --git a/talks/rennes-2015/images/better.png 
b/talks/rennes-2015/images/better.png
new file mode 100644
index 0000000..29212e3
Binary files /dev/null and b/talks/rennes-2015/images/better.png differ
diff --git a/talks/rennes-2015/images/ci-jenkins-cropped.png 
b/talks/rennes-2015/images/ci-jenkins-cropped.png
new file mode 100644
index 0000000..5bc4297
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differ
diff --git a/talks/rennes-2015/images/ci-jenkins.png 
b/talks/rennes-2015/images/ci-jenkins.png
new file mode 100644
index 0000000..e249d92
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diff --git a/talks/rennes-2015/images/debian-upgrade-instructions.png 
b/talks/rennes-2015/images/debian-upgrade-instructions.png
new file mode 100644
index 0000000..a2b8fc2
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b/talks/rennes-2015/images/debian-upgrade-instructions.png differ
diff --git a/talks/rennes-2015/images/debian-upgrade-warning.png 
b/talks/rennes-2015/images/debian-upgrade-warning.png
new file mode 100644
index 0000000..d643a5c
Binary files /dev/null and 
b/talks/rennes-2015/images/debian-upgrade-warning.png differ
diff --git a/talks/rennes-2015/images/docker-security.png 
b/talks/rennes-2015/images/docker-security.png
new file mode 100644
index 0000000..fc3cb52
Binary files /dev/null and b/talks/rennes-2015/images/docker-security.png differ
diff --git a/talks/rennes-2015/images/gnunet-graph.dot 
b/talks/rennes-2015/images/gnunet-graph.dot
new file mode 100644
index 0000000..ca37552
--- /dev/null
+++ b/talks/rennes-2015/images/gnunet-graph.dot
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+  "41711296" -> "44741376" [color = red];
+  "41711296" -> "41713408" [color = red];
+  "41711296" -> "41631936" [color = red];
+  "41711296" -> "45286720" [color = red];
+  "41711296" -> "31718400" [color = red];
+  "31718400" [label = "libdaemon-0.14", shape = box, fontname = Helvetica];
+  "31718208" [label = "check-0.9.14", shape = box, fontname = Helvetica];
+  "41829504" [label = "soxr-0.1.1", shape = box, fontname = Helvetica];
+  "41829312" [label = "twolame-0.3.13", shape = box, fontname = Helvetica];
+  "41829312" -> "27446656" [color = red];
+  "41829312" -> "45074880" [color = red];
+  "41829312" -> "34809344" [color = red];
+  "42198528" [label = "xvid-1.3.3", shape = box, fontname = Helvetica];
+  "42198528" -> "35481280" [color = red];
+  "35480896" [label = "gstreamer-1.6.1", shape = box, fontname = Helvetica];
+  "35480896" -> "29008256" [color = red];
+  "35480896" -> "30433024" [color = red];
+  "35480896" -> "41713408" [color = red];
+  "35480896" -> "41713216" [color = red];
+  "35480896" -> "27446656" [color = red];
+  "35480896" -> "31250880" [color = red];
+  "35480896" -> "43592128" [color = red];
+  "35480896" -> "41713408" [color = red];
+  "35480704" [label = "gst-plugins-base-1.6.1", shape = box, fontname = 
Helvetica];
+  "35480704" -> "31250880" [color = red];
+  "35480704" -> "41713408" [color = red];
+  "35480704" -> "41713216" [color = red];
+  "35480704" -> "43592128" [color = red];
+  "35480704" -> "35227136" [color = red];
+  "35480704" -> "35481088" [color = red];
+  "35480704" -> "41406848" [color = red];
+  "35480704" -> "34808576" [color = red];
+  "35480704" -> "34808192" [color = red];
+  "35480704" -> "34808384" [color = red];
+  "35480704" -> "42839232" [color = red];
+  "35480704" -> "45073920" [color = red];
+  "35480704" -> "42764928" [color = red];
+  "35480704" -> "42763968" [color = red];
+  "35480704" -> "43258240" [color = red];
+  "35480704" -> "35480896" [color = red];
+  "35227136" [label = "cdparanoia-10.2", shape = box, fontname = Helvetica];
+  "35481088" [label = "orc-0.4.24", shape = box, fontname = Helvetica];
+  "47325952" [label = "libmicrohttpd-0.9.45", shape = box, fontname = 
Helvetica];
+  "47325952" -> "44507520" [color = red];
+  "47325952" -> "30429760" [color = red];
+  "47325952" -> "44744448" [color = red];
+  "47325952" -> "30429568" [color = red];
+  "47325952" -> "45073920" [color = red];
+
+}
diff --git a/talks/rennes-2015/images/hope-hero.jpg 
b/talks/rennes-2015/images/hope-hero.jpg
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diff --git a/talks/rennes-2015/images/package-managers-cropped.png 
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new file mode 100644
index 0000000..5793914
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diff --git a/talks/rennes-2015/images/package-managers.png 
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differ
diff --git a/talks/rennes-2015/my-software.scm 
b/talks/rennes-2015/my-software.scm
new file mode 100644
index 0000000..c5e1ac0
--- /dev/null
+++ b/talks/rennes-2015/my-software.scm
@@ -0,0 +1,6 @@
+(use-package-modules base gcc)
+
+(packages->manifest
+ (list gcc-5 glibc binutils
+       coreutils findutils sed grep
+       gnu-make))
diff --git a/talks/rennes-2015/outline.org b/talks/rennes-2015/outline.org
new file mode 100644
index 0000000..32db7c0
--- /dev/null
+++ b/talks/rennes-2015/outline.org
@@ -0,0 +1,135 @@
+#+TITLE: Reproducible Software Deployment with GNU Guix
+
+
+* Summary
+
+  “It used to work perfectly, then I upgraded something, and somehow…”
+  Sounds like a déjà vu?  Sometimes feel like software deployment is
+  unpredictable?  You think reproducible research demands reproducible
+  software deployment?  Ever wondered if you can trust your compiler or
+  the integrity of those binary packages you have downloaded?
+
+  This talk introduces GNU Guix, a package manager that implements the
+  /functional package management/ paradigm pioneered by Nix to address
+  these issues.  Guix supports transactional upgrades and rollbacks, as
+  well as support for multiple software profiles.  In this talk, I will
+  introduce functional package management and demonstrate Guix on
+  practical use cases.  I will discuss the implications on
+  (bit-)reproducible packages and environments, and how this can lead to
+  /verifiable/ binaries.  Lastly, we will see how this extends to
+  whole-system deployments with GuixSD, the Guix System Distribution.
+
+
+* COMMENT Random notes
+
+** Phases
+
+   - sentiments : surprise, déception, promesse, doute, angoisse (pick 3)
+   - registres : conceptuel, factuel, émotionnel
+
+** Breton (cf. [[http://www.lexilogos.com/breton_mots.htm][expressions]] & 
[[https://fr.wikipedia.org/wiki/Breton][WP]])
+
+   - salut -> kenavo
+   - attention ! -> diwall !
+   - merci -> Mersi bras | Trugarez
+
+** Debian example with hooks
+
+#+BEGIN_VERBATIM
+$ sudo apt-get install gpm
+Reading package lists... Done
+Building dependency tree       
+Reading state information... Done
+The following package was automatically installed and is no longer required:
+  liblwgeom-2.1.7
+Use 'apt-get autoremove' to remove it.
+The following NEW packages will be installed:
+  gpm
+0 upgraded, 1 newly installed, 0 to remove and 31 not upgraded.
+Need to get 229 kB of archives.
+After this operation, 496 kB of additional disk space will be used.
+Get:1 http://ftp.fr.debian.org/debian/ wheezy/main gpm i386 1.20.4-6 [229 kB]
+Fetched 229 kB in 0s (567 kB/s)
+Preconfiguring packages ...
+Selecting previously unselected package gpm.
+(Reading database ... 190889 files and directories currently installed.)
+Unpacking gpm (from .../archives/gpm_1.20.4-6_i386.deb) ...
+Processing triggers for man-db ...
+Processing triggers for install-info ...
+Setting up gpm (1.20.4-6) ...
+
+Creating config file /etc/gpm.conf with new version
+
+#+END_VERBATIM
+
+** Docker: add screenshot of 
http://www.banyanops.com/blog/analyzing-docker-hub/
+
+** Docker: see 
http://www.vitavonni.de/blog/201503/2015031201-the-sad-state-of-sysadmin-in-the-age-of-containers.html
+
+** [[http://blog.circleci.com/its-the-future/][It's the future!]]
+
+** deployment is hard
+
+*** side effects
+
+*** things not really under control
+
+*** sequence of effectful operations
+
+** deployment is harder in practice
+
+*** apt-get, pypi, 
[[http://dustycloud.org/blog/javascript-packaging-dystopia/][npm, bower]], 
cabal, gem, etc.
+
+*** environments: debootstrap, 
[[http://blogs.rdoproject.org/7843/guix-tox-a-functional-version-of-tox][virtualenv/tox]],
 [[http://dthompson.us/ruby-on-guix.html][RVM/Bundler]], etc.
+
+*** services?
+
+
+
+* The upgrade problem [doubt]
+
+  - apt-get dist-upgrade, breakage, etc.
+    + power outage => breakage!
+    + no unattended system upgrades
+    + no way back
+    + screenshots of debian.org
+
+* The "reproducibility" problem [angst]
+
+  - reproduce development environments
+  - reproduce bit-for-bit
+    + Debian reproducibility problem
+
+* The reproducibility problem, worst [angst]
+
+  - pypi etc.
+  - docker -> pizza, not recipe
+  - docker security issues, sysadmin problem
+
+* Guix solution [hope | facts]
+
+  - demo 'guix package' etc. (cf. 
[[file:~/src/guix-maintenance/talks/reppar-2015/talk.tex::\$%20guix%20package%20-i%20gcc-toolchain%20coreutils%20sed%20grep][RepPar]])
+  - ci.inria.fr/alta screenshot
+
+* under the hood: FPM [hope | concepts]
+
+  - function, composition, etc.
+  - references
+  - the daemon, containers, etc.
+  - bootstrapping
+  - bit-reproducible builds
+
+* Corresponding Source [doubt | concepts]
+
+  - 'guix challenge'
+  - diverse double compilation
+
+* whole-system deployments
+
+  - GuixSD config
+
+* lively!
+
+  - contributor stats
+  - package stats
+  - release timeline
diff --git a/talks/rennes-2015/rules.ini b/talks/rennes-2015/rules.ini
new file mode 120000
index 0000000..07e2bdc
--- /dev/null
+++ b/talks/rennes-2015/rules.ini
@@ -0,0 +1 @@
+../reppar-2015/rules.ini
\ No newline at end of file
diff --git a/talks/rennes-2015/talk.tex b/talks/rennes-2015/talk.tex
new file mode 100644
index 0000000..c256546
--- /dev/null
+++ b/talks/rennes-2015/talk.tex
@@ -0,0 +1,769 @@
+% The comment below tells Rubber to compile the .dot files.
+%
+% rubber: module graphics
+% rubber: rules rules.ini
+
+\documentclass{beamer}
+
+\usetheme{default}
+
+\usepackage{helvet}
+\usecolortheme{seagull}         % white on black
+
+\usepackage[utf8]{inputenc}
+\PassOptionsToPackage{hyphens}{url}\usepackage{hyperref,xspace,multicol}
+\usepackage[absolute,overlay]{textpos}
+\usepackage{tikz}
+\usetikzlibrary{arrows,shapes,trees,shadows,positioning}
+\usepackage{fancyvrb}           % for \Verb
+
+% Remember the position of every picture.
+\tikzstyle{every picture}+=[remember picture]
+
+\tikzset{onslide/.code args={<#1>#2}{%
+  \only<#1>{\pgfkeysalso{#2}} % \pgfkeysalso doesn't change the path
+}}
+
+% Colors.
+\definecolor{guixred1}{RGB}{226,0,38}  % red P
+\definecolor{guixorange1}{RGB}{243,154,38}  % guixorange P
+\definecolor{guixyellow}{RGB}{254,205,27}  % guixyellow P
+\definecolor{guixred2}{RGB}{230,68,57}  % red S
+\definecolor{guixorange2}{RGB}{236,117,40}  % guixorange S
+\definecolor{guixtaupe}{RGB}{134,113,127} % guixtaupe S
+\definecolor{guixgrey}{RGB}{91,94,111} % guixgrey S
+\definecolor{guixblue1}{RGB}{38,109,131} % guixblue S
+\definecolor{guixblue2}{RGB}{10,50,80} % guixblue S
+\definecolor{guixgreen1}{RGB}{133,146,66} % guixgreen S
+\definecolor{guixgreen2}{RGB}{157,193,7} % guixgreen S
+
+\setbeamerfont{title}{size=\huge}
+\setbeamerfont{frametitle}{size=\huge}
+
+% White-on-black color theme.
+\setbeamercolor{structure}{fg=guixorange1,bg=black}
+\setbeamercolor{title}{fg=white,bg=black}
+\setbeamercolor{date}{fg=guixorange1,bg=black}
+\setbeamercolor{frametitle}{fg=white,bg=black}
+\setbeamercolor{titlelike}{fg=white,bg=black}
+\setbeamercolor{normal text}{fg=white,bg=black}
+\setbeamercolor{alerted text}{fg=guixyellow,bg=black}
+\setbeamercolor{section in toc}{fg=white,bg=black}
+\setbeamercolor{section in toc shaded}{fg=white,bg=black}
+\setbeamercolor{subsection in toc}{fg=guixorange1,bg=black}
+\setbeamercolor{subsection in toc shaded}{fg=white,bg=black}
+\setbeamercolor{subsubsection in toc}{fg=guixorange1,bg=black}
+\setbeamercolor{subsubsection in toc shaded}{fg=white,bg=black}
+\setbeamercolor{frametitle in toc}{fg=white,bg=black}
+\setbeamercolor{local structure}{fg=guixorange1,bg=black}
+
+\newcommand{\highlight}[1]{\alert{\textbf{#1}}}
+
+\title{Reproducible Software Deployment with GNU~Guix}
+
+\author{Ludovic Courtès}
+\date{\small{Inria Rennes Bretagne Atlantique, November 2015}}
+
+\setbeamertemplate{navigation symbols}{} % remove the navigation bar
+
+\AtBeginSection[]{
+  \begin{frame}
+    \frametitle{}
+    \tableofcontents[currentsection]
+  \end{frame} 
+}
+
+
+\newcommand{\screenshot}[1]{
+  \begin{frame}[plain]
+    \begin{tikzpicture}[remember picture, overlay]
+      \node [at=(current page.center), inner sep=0pt]
+        {\includegraphics[width=\paperwidth]{#1}};
+    \end{tikzpicture}
+  \end{frame}
+}
+
+
+\begin{document}
+
+\maketitle
+
+\setbeamercolor{normal text}{bg=guixblue2}
+\begin{frame}
+  \Huge{\textbf{The difficulty of keeping software environments under
+      control.}}
+\end{frame}
+\setbeamercolor{normal text}{fg=white,bg=black}
+
+\begin{frame}[plain]
+  \Huge{\#1. Upgrades are hard.}
+\end{frame}
+
+\screenshot{images/debian-upgrade-warning}
+\screenshot{images/debian-upgrade-instructions}
+
+\begin{frame}[plain]
+  \Huge{\#2. Stateful system management is intractable.}
+\end{frame}
+
+\begin{frame}[plain, fragile]
+  \begin{overlayarea}{\textwidth}{8cm}
+  \begin{tikzpicture}[stylish/.style = {
+                        draw=guixorange1, very thick,
+                        fill=white, text=black, text width=3.2cm,
+                        rounded corners=2mm, minimum height=1.4cm,
+                        text centered
+                      }]
+    \matrix[row sep=6mm, column sep=1.5cm] {
+      \node(inita)[stylish]{\textbf{\Large{\$DISTRO}}};
+      & \node(initb)[stylish]{\textbf{\Large{\$DISTRO}}};
+      \\
+
+      \node<2->(state1a)[stylish]{state $1_a$};
+      & \node<2->(state1b)[stylish]{state $1_b$};
+      \\
+
+      \node<3->(state2a)[stylish]{state $2_a$};
+      & \node<3->(state2b)[stylish]{state $2_b$};
+      \\
+
+      \node<4->(state3a)[stylish]{state $3_a$};
+      & \node<4->(state3b)[stylish]{state $3_b$};
+      \\
+    };
+
+    \path[->, very thick, draw=white]<2->
+      (inita) edge node[right]{\texttt{apt-get update}} (state1a);
+    \path[->, very thick, draw=white]<3->
+      (state1a) edge node[right]{\texttt{apt-get install foo}} (state2a);
+    \path[->, very thick, draw=white]<4->
+      (state2a) edge node[right]{\texttt{apt-get remove bar}} (state3a);
+    
+    \path[->, very thick, draw=white]<2->
+      (initb) edge node[right]{\texttt{apt-get update}} (state1b);
+    \path[->, very thick, draw=white]<3->
+      (state1b) edge node[right]{\texttt{apt-get remove bar}} (state2b);
+    \path[->, very thick, draw=white]<4->
+      (state2b) edge node[right]{\texttt{apt-get install foo}} (state3b);
+
+  \end{tikzpicture}
+  \end{overlayarea}
+
+  \begin{tikzpicture}[overlay]
+    \node<5>[rounded corners=4, text centered,
+          fill=guixorange1, text width=3cm,
+          inner sep=5mm, opacity=.75, text opacity=1,
+          drop shadow={opacity=0.5}] at (5, 4) {
+            \textbf{\Huge{= ?}}
+          };
+  \end{tikzpicture}
+\end{frame}
+
+\begin{frame}[plain]
+  \Huge{\#3. It's worse than this.}
+\end{frame}
+
+\screenshot{images/package-managers-cropped}
+
+\begin{frame}[plain]
+  \Huge{It's worse, really.}
+\end{frame}
+
+\begin{frame}
+  \Large{``Let's Package jQuery: A Javascript Packaging Dystopian
+    Novella'' by Chris Webber}
+  \\[2.cm]
+  
+  \url{http://dustycloud.org/blog/javascript-packaging-dystopia/}
+\end{frame}
+
+\begin{frame}[plain]
+  \LARGE{\textbf{Giving up?}}
+  \\[1.0cm]
+  \uncover<2->{$\rightarrow$ ``app bundles'' (Docker images)}
+\end{frame}
+
+\screenshot{images/docker-security}
+
+% TODO: 
http://www.vitavonni.de/blog/201503/2015031201-the-sad-state-of-sysadmin-in-the-age-of-containers.html
+
+\begin{frame}[plain]
+  \begin{tikzpicture}[remember picture, overlay]
+    \node [at=(current page.center), inner sep=0pt]
+          {\includegraphics[height=\paperheight]{images/hope-hero}};
+  \end{tikzpicture}
+\end{frame}
+
+%% \section{Functional Package Management}
+
+\setbeamercolor{normal text}{bg=guixblue2}
+\begin{frame}[plain]
+  \Huge{\textbf{Functional package management.}}
+\end{frame}
+\setbeamercolor{normal text}{fg=white,bg=black}
+
+\begin{frame}[plain]
+  \Large{
+    $\texttt{openmpi} = f(\texttt{hwloc}, \texttt{gcc}, 
\texttt{make},\texttt{coreutils})$
+    
+    \uncover<2->{$\texttt{hwloc} = g(\texttt{pciaccess}, \texttt{gcc}, 
\texttt{make}, \texttt{coreutils})$}
+
+    \uncover<3->{$\texttt{gcc} = h(\texttt{make}, \texttt{coreutils}, 
\texttt{gcc}_0)$}
+    
+    \uncover<3->{\textrm{...}}
+  }
+
+  \uncover<1>{\large{where $f =$ \texttt{./configure \&\& make \&\& make 
install}}}
+
+  \begin{tikzpicture}[overlay]
+    \node<4->[fill=guixorange1, text=black, text opacity=1, opacity=.7,
+          rounded corners=2mm, inner sep=5mm] at (5, 1) {
+            \textbf{\Large{the complete DAG is captured}}
+          };
+  \end{tikzpicture}
+\end{frame}
+
+\begin{frame}
+  \Large{
+    \begin{itemize}
+    %% \item<3-> \textit{Caching Function Calls Using Precise Dependencies}
+    %%   (``Vesta''), Heydon et al., 2000
+    \item \textit{A Safe and Policy-Free System for Software
+      Deployment}, Dolstra et al., 2003\\ \alert{\textbf{Nix}},
+      \url{http://nixos.org/nix/}
+    \item \textit{Functional Package Management with Guix}, Courtès,
+      2013
+    \end{itemize}
+  }
+\end{frame}
+
+\begin{frame}[fragile]
+  \begin{semiverbatim}
+(define hello
+  (\alert{package}
+   (name "hello")
+   (version "2.10")
+   (source (\alert{origin}
+            (method url-fetch)
+            (uri (string-append
+                  "mirror://gnu/\textrm{...}/hello-" version
+                  ".tar.gz"))
+            (sha256 (base32 "0wqd\textrm{...}dz6"))))
+   (\alert{build-system} gnu-build-system)
+   (synopsis "Hello, world!")
+   (description "Produce a friendly greeting.")
+   (home-page "http://www.gnu.org/software/hello/";)
+   (license gpl3+)))
+  \end{semiverbatim}
+
+  % \begin{tikzpicture}[overlay]
+  %   \node[rounded corners=4, text centered,
+  %         fill=guixorange1, text width=3cm,
+  %         inner sep=3mm, rotate=-5, opacity=.75, text opacity=1,
+  %         drop shadow={opacity=0.5},
+  %         at=(current page.center)] {
+  %           \textbf{\large{Emacs + Geiser demo!}}
+  %         };
+  % \end{tikzpicture}
+\end{frame}
+
+\begin{frame}[fragile]{}
+  \begin{tikzpicture}[tools/.style = {
+                        text width=35mm, minimum height=4cm,
+                        text centered,
+                        rounded corners=2mm,
+                        fill=white, text=black
+                      },
+                      tool/.style = {
+                        fill=white, text=black, text width=3cm,
+                        text centered
+                      },
+                      daemon/.style = {
+                        rectangle, text width=50mm, text centered,
+                        rounded corners=2mm, minimum height=15mm,
+                        top color=guixorange1,
+                        bottom color=guixyellow,
+                        text=black
+                      },
+                      builders/.style = {
+                        draw=guixorange1, very thick, dashed,
+                        fill=black, text=white, text width=5cm,
+                        rounded corners=2mm,
+                      },
+                      builder/.style = {
+                        draw=guixred2, thick, rectangle,
+                        fill=black, text=white,
+                        rotate=90
+                      }]
+    \matrix[row sep=3mm, column sep=1cm] {
+      \node(builders)[builders, text height=5cm]{}
+          node[fill=black, text=white] at (0, 2) {\large{\textbf{build 
processes}}}
+          node[fill=black, text=white] at (0, 1.5) {chroot, separate UIDs}
+          node[builder, onslide=<1-2>{black}] at (-1,-0.5) {\alert<3->{Guile}, 
make, etc.}
+          node[builder, onslide=<1-2>{black}] at ( 0,-0.5) {\alert<3->{Guile}, 
make, etc.}
+          node[builder, onslide=<1-2>{black}] at ( 1,-0.5) {\alert<3->{Guile}, 
make, etc.}; &
+      \node[tools]{}
+          node[fill=white, text=black] at (0, 1) {\large{\textbf{Guile 
Scheme}}}
+          node[tool] at (0, 0) {\texttt{(guix packages)}}
+          node(client)[tool] at (0, -1) {\texttt{(guix store)}};
+      \\
+
+      \node(daemon)[daemon]{\large{\textbf{build daemon}}}; &
+      &
+      \\
+    };
+  \end{tikzpicture}
+
+  \begin{tikzpicture}[overlay]
+    \path[very thick, draw=guixorange1]<2->
+      (client.south) edge [out=-90, in=0, ->] node[below, sloped]{RPCs} 
(daemon.east);
+    \path[->, very thick, draw=guixorange1]<3->
+      (daemon) edge (builders);
+  \end{tikzpicture}
+\end{frame}
+
+\begin{frame}[fragile]
+  %% \frametitle{Bit-Reproducible Builds$^*$}
+  %% \framesubtitle{$^*$ almost!}
+
+  \begin{semiverbatim}
+\$ guix build hello
+\uncover<2->{/gnu/store/\tikz[baseline]{\node[anchor=base](nixhash){\alert<2>{h2g4sf72\textrm{...}}};}-hello-2.10}
+
+\uncover<3->{\$ \alert<3>{guix gc --references 
/gnu/store/\textrm{...}-hello-2.10}
+/gnu/store/\textrm{...}-glibc-2.22
+/gnu/store/\textrm{...}-gcc-4.9.3-lib
+/gnu/store/\textrm{...}-hello-2.10
+}
+  \end{semiverbatim}
+
+  \begin{tikzpicture}[overlay]
+    \node<1>(labelnixhash) [fill=white, text=black] at (current page.center) {%
+      \Large{\textbf{isolated build}: chroot, separate name spaces, etc.}
+    };
+
+    \node<2>(labelnixhash) [fill=white, text=black] at (4cm, 2cm) {%
+      hash of \textbf{all} the dependencies};
+    \path[->]<2>(labelnixhash.north) edge [bend left, in=180, out=-45] 
(nixhash.south);
+
+    \draw<4-> (-10pt, 105pt) [very thick, color=guixorange2, rounded 
corners=8pt]
+      arc (10:-50:-50pt and 110pt);
+    \node<4->[fill=white, text=black, text opacity=1, opacity=.7,
+          rounded corners=2mm, inner sep=5mm]
+      at (7, 2) {\textbf{\Large{(nearly) bit-identical for everyone}}};
+    %% \node<5>[fill=white, text=black, text opacity=1, opacity=.7,
+    %%       rounded corners=1mm, inner sep=3mm]
+    %%   at (8, 1) {\url{http://reproducible.debian.net}};
+  \end{tikzpicture}
+
+\end{frame}
+
+\begin{frame}[fragile]
+
+  \begin{semiverbatim}
+\$ guix package -i gcc-toolchain coreutils sed grep
+\textrm{...}
+
+\$ eval `guix package --search-paths`
+\textrm{...}
+
+\$ guix package --manifest=my-software.scm
+\textrm{...}
+  \end{semiverbatim}
+
+  \begin{tikzpicture}[overlay]
+    \node[rounded corners=4, text centered,
+          fill=guixorange1, text width=3cm,
+          inner sep=3mm, rotate=5, opacity=.75, text opacity=1,
+          drop shadow={opacity=0.5}] at (5, 4) {
+            \textbf{\large{demo}}
+          };
+  \end{tikzpicture}
+\end{frame}
+
+\begin{frame}[fragile]
+  \Huge{Want your PhD student to hack on GNUnet?}
+  \\[2cm]
+  \uncover<2->{\Large{A simple matter of installing the deps, right?}}
+\end{frame}
+
+\begin{frame}[plain]
+  \begin{tikzpicture}[remember picture, overlay]
+    \node [at=(current page.center), inner sep=0pt]
+          {\includegraphics[width=\paperwidth]{images/gnunet-graph}};
+  \end{tikzpicture}
+\end{frame}
+
+
+\begin{frame}[fragile]
+  \begin{semiverbatim}
+\$ guix environment --container gnunet
+\textrm{...}
+
+\$ guix environment --ad-hoc python-ipython python-numpy \\
+    -E ipython
+\textrm{...}
+
+  \end{semiverbatim}
+\end{frame}
+
+\screenshot{images/ci-jenkins-cropped}
+
+\setbeamercolor{normal text}{bg=guixblue2}
+\begin{frame}[plain]
+  \Huge{\textbf{Whole-system deployment.}}
+\end{frame}
+\setbeamercolor{normal text}{fg=white,bg=black}
+
+\begin{frame}[fragile]
+  \begin{overlayarea}{\textwidth}{8cm}
+  \begin{tikzpicture}[kernel/.style = {
+                        text width=10cm, minimum height=1.4cm,
+                        text centered,
+                        rounded corners=2mm,
+                        fill=white, text=black
+                      },
+                      userland/.style = {
+                        draw=guixorange1, very thick,
+                        fill=white, text=black, text width=5cm,
+                        rounded corners=2mm, minimum height=1.4cm,
+                        text centered
+                      }]
+    \matrix[row sep=6mm, column sep=1cm] {
+      \node(kernel)[kernel]{\textbf{\Large{Linux-libre}}};
+      \\
+
+      \node<2->(initrd)[userland]{\textbf{\Large{initial RAM disk}}};
+      \\
+
+      \node<4->(dmd)[userland]{\textbf{\Large{PID 1: GNU dmd}}
+        \\ services...};
+      \\
+
+      \node<6->(user)[userland, dashed]{\textbf{\Large{applications}}};
+      \\
+    };
+
+    \path[->, very thick, draw=guixred1]<2->
+      (kernel) edge (initrd);
+    \path[->, very thick, draw=guixred1]<4->
+      (initrd) edge (dmd);
+    \path[->, very thick, draw=guixred1]<6->
+      (dmd) edge (user);
+    
+  \end{tikzpicture}
+  \end{overlayarea}
+
+  \begin{tikzpicture}[overlay,
+                      guile/.style = {
+                         fill=guixyellow, text=black, rotate=30,
+                         rounded corners=4mm, text width=3cm,
+                         opacity=.75, text opacity=1, text centered,
+                         minimum height=1.3cm
+                      }]
+    \node<3->(labelinitrd) [guile] at (initrd.east) {%
+      \Large{Guile}
+    };
+    \node<5->(labelinitrd) [guile] at (dmd.east) {%
+      \Large{Guile}
+    };
+  \end{tikzpicture}
+\end{frame}
+
+\setbeamercolor{normal text}{bg=guixblue2}
+\begin{frame}[plain]
+  \Huge{\textbf{Trustworthiness.}}
+\end{frame}
+\setbeamercolor{normal text}{fg=white,bg=black}
+
+\begin{frame}[plain]
+  \begin{quotation}
+    \noindent
+    \Large{Debian’s dirtiest secret:\\
+      \noindent
+      \textbf{Binary packages \alert{built by developers} are used in
+        the archive}}
+  \end{quotation}
+  \hfill{ --- Lucas Nussbaum, FOSDEM 2015}
+\end{frame}
+
+% TODO: CIA's XCode exploit here
+
+\begin{frame}[fragile]
+  \frametitle{Transparent binary/source deployment}
+  \begin{overlayarea}{\textwidth}{6cm}
+    \begin{semiverbatim}
address@hidden \alert{guix package --install=}emacs
+The following package will be installed:
+   emacs-24.5  /gnu/store/\dots{}-emacs-24.5
+\only<1>{
+The following files will be \alert{downloaded}:
+   /gnu/store/\dots{}-emacs-24.5
+   /gnu/store/\dots{}-libxpm-3.5.10
+   /gnu/store/\dots{}-libxext-1.3.1
+   /gnu/store/\dots{}-libxaw-1.0.11
+}\only<2>{
+The following files will be \alert{downloaded}:
+   /gnu/store/\dots{}-libxext-1.3.1
+   /gnu/store/\dots{}-libxaw-1.0.11
+The following derivations will be \alert{built}:
+   /gnu/store/\dots{}-emacs-24.5.drv
+   /gnu/store/\dots{}-libxpm-3.5.10.drv
+}
+    \end{semiverbatim}
+  \end{overlayarea}
+\end{frame}
+
+\begin{frame}[plain, fragile, t]
+  \begin{tikzpicture}[box/.style = {
+                         rounded corners=2mm,
+                         fill=white, text=black, text width=4.8cm,
+                         inner sep=2mm
+                      },
+                      server/.style = {
+                         text centered, rounded corners=2mm,
+                         fill=guixorange1, text=black, text width=3.4cm,
+                         inner sep=3mm
+                      },
+                      note/.style = {
+                        rounded corners=4, text centered,
+                        fill=guixorange1, text width=3cm,
+                        inner sep=3mm, rotate=5, opacity=.75, text opacity=1,
+                        drop shadow={opacity=0.5}
+                      }]
+    \matrix[row sep=1.4cm, column sep=1.4cm] {
+      \node(def)[box]{\texttt{(define foo (package \textrm{...}))}};
+      & \node(user)[server]{\textbf{user}};
+      \\
+      \node<2->(build)[box]{\texttt{guix build foo}
+         \texttt{/gnu/store/\textrm{...}-foo-1.0}};
+      & \node<4-5>(hydra)[server]{hydra.gnu.org \textbf{build~farm}};
+      \\
+      \node<3->(push){\texttt{git push}};
+      & \node<3->(savannah)[server]{git.sv.gnu.org}; \\
+      \\
+    };
+
+    \path[->, very thick, draw=guixorange1]<2->
+      (def) edge node[left]{test} (build);
+    \path[->, very thick, draw=guixorange1]<3->
+      (build) edge (push);
+    \path[->, very thick, draw=guixorange1]<3->
+      (push) edge[->, in=-110, out=-70] (savannah);
+    \path[->, very thick, draw=guixorange1]<4-5>
+      (hydra) edge node[right]{pull} (savannah);
+    \path[->, very thick, draw=guixorange1]<4-6>
+      (user) edge[in=30,out=-30] node[left, sloped]{pull}
+      (savannah.north east);
+    \path[->, very thick, draw=guixorange1]<5>
+      (user) edge node[right]{get binary} (hydra);
+
+    \node<7>[overlay, fill=black, opacity=.8, 
+             text height=9cm, text width=11cm,
+             at=(current page.center)] {};
+
+    \node<7>[note, rotate=3] at (2,1) {\textbf{no ``maintainer uploads''}};
+    \node<7>[note, rotate=-10] at (-2,-1) {\textbf{no single point of trust}};
+  \end{tikzpicture}
+\end{frame}
+
+\begin{frame}[plain, fragile]
+  \begin{tikzpicture}[white/.style = {
+                         text centered, rounded corners=2mm,
+                         fill=white, text=black, text width=2.8cm,
+                         inner sep=3mm
+                      },
+                      orange/.style = {
+                         text centered, rounded corners=2mm,
+                         fill=guixorange1, text=black, text width=2.8cm,
+                         inner sep=3mm
+                      }]
+    \matrix[row sep=1cm, column sep=0.5cm] {
+      \node(source)[white]{\large{\textbf{source}}\\package~recipes};
+      & \node(binary)[orange]{\large{\textbf{binary}} \texttt{hydra.gnu.org}};
+      \\
+      \node{\texttt{(define emacs (\alert{package} \textrm{\dots{}}))}};
+      & \node{\texttt{/gnu/store/\textrm{\dots{}}-emacs-24.5}};
+      \\
+    };
+
+    \path[<->, very thick, draw=white]
+      (source) edge node[above]{\Huge{\textbf{?}}} (binary);
+  \end{tikzpicture}
+\end{frame}
+
+\begin{frame}{The path to greater user control}
+  \Large{
+  \begin{enumerate}
+  \item{ \textbf{Bit-reproducible builds}
+    \begin{itemize}
+    \item<2-> we have \highlight{isolated build environments}!
+    \item<2-> ... but we need builds to be \highlight{deterministic}
+    \item<2-> \url{http://reproducible-builds.org}
+    \end{itemize}}
+  \item{\textbf{No single binary provider}
+    \begin{itemize}
+    \item<3-> \texttt{guix publish}
+    \item<3-> publish over GNUnet? (GSoC 2015)
+  \end{itemize}}
+  \item \textbf{\alert<4>{Tools for users to challenge binaries}}
+  \end{enumerate}
+  }
+\end{frame}
+
+\begin{frame}[fragile]
+  \begin{semiverbatim}
+$ \alert{guix challenge} --substitute-urls="http://hydra.gnu.org 
http://guix.example.org";
+\alert{/gnu/store/\dots{}-openssl-1.0.2d contents differ}:
+  local hash: 0725l22\dots{}
+  http://hydra.gnu.org/\dots{}-openssl-1.0.2d: 0725l22\dots{}
+  http://guix.example.org/\dots{}-openssl-1.0.2d: 1zy4fma\dots{}
+\alert{/gnu/store/\dots{}-git-2.5.0 contents differ}:
+  local hash: 00p3bmr\dots{}
+  http://hydra.gnu.org/\dots{}-git-2.5.0: 069nb85\dots{}
+  http://guix.example.org/\dots{}-git-2.5.0: 0mdqa9w\dots{}
+\alert{/gnu/store/\dots{}-pius-2.1.1 contents differ}:
+  local hash: 0k4v3m9\dots{}
+  http://hydra.gnu.org/\dots{}-pius-2.1.1: 0k4v3m9\dots{}
+  http://guix.example.org/\dots{}-pius-2.1.1: 1cy25x1\dots{}
+  \end{semiverbatim}
+\end{frame}
+
+%% \begin{frame}
+%%   \frametitle{Ken Thompson's attack?}
+
+%%   \begin{itemize}
+%%     \item ``Reflections on Trusting Trust'', Ken Thompson
+%%     \item ``Countering ... Through Diverse Double Compilation'', David
+%%       A. Wheeler
+%%   \end{itemize}
+%% \end{frame}
+
+\setbeamercolor{normal text}{bg=guixblue2}
+\begin{frame}[plain]
+  \Huge{\textbf{Status.}}
+\end{frame}
+\setbeamercolor{normal text}{fg=white,bg=black}
+
+\begin{frame}{Timeline}
+  \begin{itemize}
+    \item Nov. 2012 --- dubbed GNU
+    \item{Jan. 2013 --- \alert{0.1}}
+    \item ...
+    \item{Apr. 2014 --- \alert{0.6}, signed binaries, \texttt{guix
+        system}}
+    \item{July 2014 --- \alert{0.7}, \textbf{installable operating
+        system}}
+    \item ...
+    \item{29 Jan. 2015 --- \alert{0.8.1}, \textbf{ARMv7 port}}
+    \item ...
+    \item Aug. 2015 --- Reproducibility in Parallel Computing Workshop
+      (RepPar)
+    \item{5 Nov. 2015 --- \alert{0.9.0}, new service framework, etc.}
+  \end{itemize}
+\end{frame}
+
+\screenshot{images/better}
+
+\begin{frame}{Status}
+  \Large{
+  \begin{itemize}
+    \item full-featured package manager
+    \item 2,600+ packages, 4 platforms
+    \item \textbf{Guix System Distribution$^\beta$}
+    \item binaries at \url{http://hydra.gnu.org}
+    \item tooling: auto-update, ``linting'', etc.
+    \item l10n: 8 languages!
+  \end{itemize}}
+\end{frame}
+
+\begin{frame}
+  \Large{
+    \begin{itemize}
+    \item $\approx$25 contributors each month
+    \item ... and lots of friendly people!
+    \item $\approx$400 commits per month
+    \item $\approx$200--500 new packages per release
+    \end{itemize}
+  }
+\end{frame}
+
+
+\begin{frame}[plain]
+
+  \vspace{0.7cm}
+  \Large{
+    \begin{itemize}
+    \item \textbf{install the distribution}
+    \item \textbf{use it}, report bugs, add packages
+    \item help with the \textbf{infrastructure} + admin
+    \item \textbf{donate} hardware/money
+    \item share your \textbf{ideas}!
+    \end{itemize}
+  }
+
+  \begin{textblock}{5}(7,8)
+    \tikz
+    \node[overlay, rounded corners=4, text centered,
+          minimum size=10mm, fill=guixorange1, text width=5cm,
+          inner sep=3mm, rotate=-7, opacity=.75, text opacity=1,
+          drop shadow={opacity=0.5}] at (3, 3) {
+            \textbf{your help needed!}
+          };
+  \end{textblock}
+\end{frame}
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\begin{frame}[plain]
+
+\vfill{
+  \vspace{2.5cm}
+  \center{\includegraphics[width=0.3\textwidth]{images/GuixSD}}\\[1.0cm]
+  address@hidden://gnu.org/software/guix/}}}
+}
+
+\end{frame}
+
+\begin{frame}{}
+
+  \begin{textblock}{12}(2, 8)
+    \tiny{
+      Copyright \copyright{} 2010, 2012, 2013, 2014, 2015 Ludovic Courtès 
address@hidden
+      GNU Guix logo, GFDL, \url{http://gnu.org/s/guix/graphics}
+
+      Copyright of other images included in this document is held by
+      their respective owners.
+      \\[3.0mm]
+      This work is licensed under the \alert{Creative Commons
+        Attribution-Share Alike 3.0} License.  To view a copy of this
+      license, visit
+      \url{http://creativecommons.org/licenses/by-sa/3.0/} or send a
+      letter to Creative Commons, 171 Second Street, Suite 300, San
+      Francisco, California, 94105, USA.
+      \\[2.0mm]
+      At your option, you may instead copy, distribute and/or modify
+      this document under the terms of the \alert{GNU Free Documentation
+        License, Version 1.3 or any later version} published by the Free
+      Software Foundation; with no Invariant Sections, no Front-Cover
+      Texts, and no Back-Cover Texts.  A copy of the license is
+      available at \url{http://www.gnu.org/licenses/gfdl.html}.
+      \\[2.0mm]
+      % Give a link to the 'Transparent Copy', as per Section 3 of the GFDL.
+      The source of this document is available from
+      \url{http://git.sv.gnu.org/cgit/guix/maintenance.git}.
+    }
+  \end{textblock}
+\end{frame}
+
+\end{document}
+
+% Local Variables:
+% coding: utf-8
+% comment-start: "%"
+% comment-end: ""
+% ispell-local-dictionary: "american"
+% compile-command: "rubber --pdf talk.tex"
+% End:
+
+%%  LocalWords:  Reproducibility
diff --git a/talks/reppar-2015/rules.ini b/talks/reppar-2015/rules.ini
index bb270ac..033a42b 100644
--- a/talks/reppar-2015/rules.ini
+++ b/talks/reppar-2015/rules.ini
@@ -5,5 +5,5 @@ target = (.*)\.pdf
 source = \1.dot
 rule = shell
 cost = 0
-command = dot -Tpdf -o $target $source
+command = dot -Tpdf -Gratio=.7 -o $target $source
 message = rendering $source into $target



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