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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 <lunar@debian.org>
Forwarded: https://github.com/prawnpdf/prawn/pull/844
Last-Update: 2019-01-07
--- a/manual/cover.rb
+++ b/manual/cover.rb
@@ -23,6 +23,8 @@ Prawn::ManualBuilder::Peritext.new do
)
unless ENV['CI']
+ last_update = Time.at(ENV['BUILD_EPOCH'].to_i) if ENV['BUILD_EPOCH']
+ last_update ||= Time.at(`git log -1 --pretty='%ct'`.to_i)
git_commit =
if Dir.exist?(File.expand_path('../.git', __dir__))
commit = `git show --pretty=%h`
@@ -34,7 +36,7 @@ Prawn::ManualBuilder::Peritext.new do
doc.canvas do
v_text = [
{
- text: "Last Update: #{Time.now.strftime('%Y-%m-%d')}\n" \
+ text: "Last Update: #{last_update.utc.strftime("%Y-%m-%d")}\n" \
"Prawn Version: #{Prawn::VERSION}\n#{git_commit}",
font: 'DejaVu',
size: 12,
--- a/manual/document_and_page_options/metadata.rb
+++ b/manual/document_and_page_options/metadata.rb
@@ -23,7 +23,7 @@ Prawn::ManualBuilder::Chapter.new do
Keywords: 'test metadata ruby pdf dry',
Creator: 'ACME Soft App',
Producer: 'Prawn',
- CreationDate: Time.now,
+ CreationDate: creation_date.utc,
}
Prawn::Document.generate('example.pdf', info: info) do
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