Source: ruby-prawn Version: 1.3.0 Severity: wishlist Tags: patch User: reproducible-builds@lists.alioth.debian.org Usertags: timestamps Control: block -1 by 782890
Hi! While working on the “reproducible builds” effort [1], we have noticed that ruby-prawn could not be built reproducibly. The attached patch will set the manual last update date to the latest debian/changelog entry. Applied together with the patch submitted for #782890, ruby-prawn can then be built reproducibly in our current experimental framework. [1]: https://wiki.debian.org/ReproducibleBuilds -- Lunar .''`. lu...@debian.org : :Ⓐ : # apt-get install anarchism `. `'` `-
From 27cfd53708b0133278723dee307e812e4f74a33e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=A9my=20Bobbio?= <lu...@debian.org>
Date: Sun, 19 Apr 2015 16:06:50 +0200
Subject: [PATCH 2/2] Make the package build reproducibly
Add 0800_enable_manual_to_be_built_reproducibly.patch
to allow the manual last update to be set using an environment
variable and set it in debian/rules.
---
debian/changelog | 5 ++
...00_enable_manual_to_be_built_reproducibly.patch | 56 ++++++++++++++++++++++
debian/patches/series | 1 +
debian/rules | 4 ++
4 files changed, 66 insertions(+)
create mode 100644 debian/patches/0800_enable_manual_to_be_built_reproducibly.patch
diff --git a/debian/changelog b/debian/changelog
index eef987e..0fc542b 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -2,6 +2,11 @@ ruby-prawn (1.3.0+dfsg-1.0~reproducible1) UNRELEASED; urgency=low
* Add 0700_use_deterministic_keys_for_gradients.patch to make
Prawn build PDF in a deterministic manner when they use gradients.
+ * Make the package build reproducibly:
+ - Add 0800_enable_manual_to_be_built_reproducibly.patch
+ to allow the manual last update to be set using an environment
+ variable.
+ - Set the build date in debian/rules.
-- Jérémy Bobbio <lu...@debian.org> Sun, 19 Apr 2015 14:25:51 +0200
diff --git a/debian/patches/0800_enable_manual_to_be_built_reproducibly.patch b/debian/patches/0800_enable_manual_to_be_built_reproducibly.patch
new file mode 100644
index 0000000..e6fc7e1
--- /dev/null
+++ b/debian/patches/0800_enable_manual_to_be_built_reproducibly.patch
@@ -0,0 +1,56 @@
+Description: Enable manual to be built reproducibly
+ In order to make the manual build reproducibly, we need a way to stop
+ writing the current build time in it.
+ .
+ The following patch will allow this in two ways: if BUILD_DATE is set
+ in the environment, the date will be taken from there; otherwise, if
+ the Git index is available, the date of the last commit will be used.
+Author: Jérémy Bobbio <lu...@debian.org>
+
+Index: git/manual/cover.rb
+===================================================================
+--- git.orig/manual/cover.rb 2015-04-19 14:21:50.000000000 +0200
++++ git/manual/cover.rb 2015-04-19 14:52:37.936507292 +0200
+@@ -23,17 +23,20 @@
+ :size => 60}
+ ], :at => [170, cursor - 160])
+
++ last_update = Time.at(ENV['BUILD_EPOCH'].to_i) if ENV['BUILD_EPOCH']
+ if Dir.exist?("#{Prawn::BASEDIR}/.git")
+ #long git commit hash
+ #commit = `git show --pretty=%H`
+ #short git commit hash
+ commit = `git show --pretty=%h`
+ git_commit = "git commit: #{commit}"
++ last_update ||= Time.at(`git log -1 --pretty='%ct'`.to_i)
+ else
+ git_commit = ""
++ last_update ||= Time.now
+ end
+
+- formatted_text_box([ {:text => "Last Update: #{Time.now.strftime("%Y-%m-%d")}\n"+
++ formatted_text_box([ {:text => "Last Update: #{last_update.utc.strftime('%Y-%m-%d')}\n"+
+ "Prawn Version: #{Prawn::VERSION}\n"+
+ git_commit,
+ :size => 12}
+Index: git/manual/document_and_page_options/metadata.rb
+===================================================================
+--- git.orig/manual/document_and_page_options/metadata.rb 2015-04-19 14:12:16.182219653 +0200
++++ git/manual/document_and_page_options/metadata.rb 2015-04-19 14:52:46.300625712 +0200
+@@ -7,6 +7,7 @@
+ require File.expand_path(File.join(File.dirname(__FILE__),
+ %w[.. example_helper]))
+
++creation_date = ENV['BUILD_EPOCH'] ? Time.at(ENV['BUILD_EPOCH'].to_i) : Time.now
+ Prawn::Document.generate("metadata.pdf",
+ :info => {
+ :Title => "My title",
+@@ -15,7 +16,7 @@
+ :Keywords => "test metadata ruby pdf dry",
+ :Creator => "ACME Soft App",
+ :Producer => "Prawn",
+- :CreationDate => Time.now
++ :CreationDate => creation_date.utc
+ }) do
+
+ text "This is a test of setting metadata properties via the info option."
diff --git a/debian/patches/series b/debian/patches/series
index 3ddcfe4..6aca906 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -6,3 +6,4 @@
0500_disable_tests_using_removed_files.patch
0600_replace_require_relative_manual.patch
0700_use_deterministic_keys_for_gradients.patch
+0800_enable_manual_to_be_built_reproducibly.patch
diff --git a/debian/rules b/debian/rules
index f98f768..5a0b525 100755
--- a/debian/rules
+++ b/debian/rules
@@ -11,6 +11,10 @@
# If you need to specify the .gemspec (eg there is more than one)
#export DH_RUBY_GEMSPEC=gem.gemspec
+LAST_CHANGE = $(shell dpkg-parsechangelog -S Date)
+BUILD_EPOCH = $(shell date -u +"%s" --date="$(LAST_CHANGE)")
+export BUILD_EPOCH
+
%:
dh $@ --buildsystem=ruby --with ruby
--
1.9.1
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