[Reproducible-commits] [presentations] 02/10: FOSDEM15: add section slides, add slides for general approach and strip-nondeterminism

[Jérémy Bobbio]

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commit 51b659af50c2f9b1af545baad76bdb6363cf74b8
Author: Jérémy Bobbio <lunar at debian.org>
Date:   Sat Jan 31 00:26:37 2015 +0100

    FOSDEM15: add section slides, add slides for general approach and strip-nondeterminism
---
 2015-01-31-FOSDEM15/2015-01-31-FOSDEM15.mdwn | 93 +++++++++++++++++++++++++---
 2015-01-31-FOSDEM15/TODO                     |  2 -
 2 files changed, 86 insertions(+), 9 deletions(-)

diff --git a/2015-01-31-FOSDEM15/2015-01-31-FOSDEM15.mdwn b/2015-01-31-FOSDEM15/2015-01-31-FOSDEM15.mdwn
index e77a4d9..d7ccf21 100644
--- a/2015-01-31-FOSDEM15/2015-01-31-FOSDEM15.mdwn
+++ b/2015-01-31-FOSDEM15/2015-01-31-FOSDEM15.mdwn
@@ -1,5 +1,11 @@
 \titlepage
 
+----------------------------------
+
+\begin{center}
+\Huge What?
+\end{center}
+
 What are reproducible builds?
 -----------------------------
 
@@ -39,6 +45,12 @@ from a given source
 \includegraphics[width=0.8\textwidth]{images/what-proofs-4}
 \end{center}
 
+----------------------------------
+
+\begin{center}
+\Huge Why?
+\end{center}
+
 Why?
 ----
 
@@ -252,6 +264,12 @@ Wouldn't it be cool?
  * More than 21,000 source packages
  * “Our priorities are our **users** and **free software**”
 
+----------------------------------
+
+\begin{center}
+\Huge How?
+\end{center}
+
 How?
 ----
 
@@ -259,8 +277,16 @@ How?
  * Reproduce the build environment
  * Eliminate unneeded variations
 
-Record the build environment
-----------------------------
+----------------------------------
+
+\begin{center}
+\Huge How:
+
+\Large Record the build environment
+\end{center}
+
+*.buildinfo
+-----------
 
 New control file `*.buildinfo` which records:
 
@@ -269,8 +295,8 @@ New control file `*.buildinfo` which records:
  * Checksum of the source package.
  * Checksums of the binary packages.
 
-Record the build environment
-----------------------------
+Example *.buildinfo
+-------------------
 
 \footnotesize
 
@@ -292,12 +318,20 @@ Build-Environment:
  …
 ~~~
 
-Reproduce the build environment
--------------------------------
+----------------------------------
+
+\begin{center}
+\Huge How:
+
+\Large Reproduce the build environment
+\end{center}
+
+snapshot.debian.org
+-------------------
 
 `snapshot.debian.org` archives every state of the Debian archive.
 
- * 2015-01-29: 28 terabytes of data in almost 17 million files.
+2015-01-29: 28 terabytes of data in almost 17 million files.
 
 srebuild
 --------
@@ -309,6 +343,37 @@ srebuild
 
 Status: work in progress
 
+----------------------------------
+
+\begin{center}
+\Huge How:
+
+\Large Eliminate unneeded variations
+\end{center}
+
+General approach
+----------------
+
+ * Gitian (Bitcoin, Tor Browser):
+     - Use a VM: same kernel, same user, same build path
+     - `libfaketime`
+ * Debian:
+     - Fix the tools
+     - Fix the build systems
+     - Work-arounds as last resort
+
+strip-nondeterminism
+--------------------
+
+ * Normalize various file formats
+ * Currently handle:
+     - ar archives (`.a`)
+     - gzip
+     - Java jar
+     - Javadoc HTML
+     - ZIP archives
+ * Written in Perl (like `dpkg-dev`)
+
 Investigating packages
 ----------------------
 
@@ -392,6 +457,14 @@ Investigating packages (cont.)
        - … *easy to extend to new file formats*
  * Falls back to binary comparison
 
+----------------------------------
+
+\begin{center}
+\Huge Test
+
+\Large (and test again)
+\end{center}
+
 reproducible.debian.net - in the beginning
 ------------------------------------------
 
@@ -530,6 +603,12 @@ Identified issues
 \includegraphics[width=0.9\textwidth]{images/stats_issues}
 \end{center}
 
+----------------------------------
+
+\begin{center}
+\Huge Findings
+\end{center}
+
 Identified issues
 -----------------
 
diff --git a/2015-01-31-FOSDEM15/TODO b/2015-01-31-FOSDEM15/TODO
index bfa2d1c..8df2bc7 100644
--- a/2015-01-31-FOSDEM15/TODO
+++ b/2015-01-31-FOSDEM15/TODO
@@ -3,8 +3,6 @@ mention
 		srebuild too early
 		"Reproduce the build environment" feels out of place + little info
 	
-	not mentioned at all yet: strip_nondeterminism and dh_stripnoterminism
-	
 	status / goals / help
 		help: dak integration, .buildinfo files integrated in the archive #763822
 		Require matching binary packages from the developer and a buildd before accepting the package in the archive. This could initially be opt-in. 

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