[DRE-maint] Bug#1025096: nanoc: FTBFS in bullseye, and will also FTBFS in bookworm next year

[Santiago Vila]

Package: src:nanoc
Version: 4.11.23-1
Severity: serious
Tags: ftbfs, patch

Dear maintainer:

During a rebuild of all packages in bullseye I noticed that this package 
does not build from source anymore:

   1) Nanoc::Core has up-to-date version information
      Failure/Error: expect(described_class.version_information).to 
match(/–#{current_year} /)

        expected "Nanoc 4.11.23 © 2007–2021 Denis Defreyne.\nRunning 
ruby 2.7.4 (2021-07-07) on x86_64-linux-gnu with RubyGems 3.2.5.\n" to 
match /–2022 /
        Diff:
        @@ -1,2 +1,3 @@
        -/–2022 /
        +Nanoc 4.11.23 © 2007–2021 Denis Defreyne.
        +Running ruby 2.7.4 (2021-07-07) on x86_64-linux-gnu with 
RubyGems 3.2.5.


This happens because there is a test which expects the current year to 
be equal to 2021, which naturally fails now that we are in 2022, and 
will fail forever from now on.

I include a trivial patch to disable the test in bullseye.

Note also that the current version in testing/unstable also has the bug 
in "latent state", as it will fail from 2023 onwards. To check this, try 
building the package after setting current_year to 2023 as in 
poc.diff.txt and you will see what happens next year.

Thanks.

[ p.s. I'm having a dejavu. Didn't I report something like this a few 
years ago? ]
-------------- next part --------------
--- a/nanoc-core/spec/nanoc/core_spec.rb
+++ b/nanoc-core/spec/nanoc/core_spec.rb
@@ -3,8 +3,8 @@
 require 'nanoc/version'
 
 describe Nanoc::Core do
-  it 'has up-to-date version information' do
-    current_year = Date.today.year
-    expect(described_class.version_information).to match(/–#{current_year} /)
-  end
+#  it 'has up-to-date version information' do
+#    current_year = Date.today.year
+#    expect(described_class.version_information).to match(/–#{current_year} /)
+#  end
 end
-------------- next part --------------
--- a/nanoc-core/spec/nanoc/core_spec.rb
+++ b/nanoc-core/spec/nanoc/core_spec.rb
@@ -4,7 +4,7 @@ require 'nanoc/version'
 
 describe Nanoc::Core do
   it 'has up-to-date version information' do
-    current_year = Date.today.year
+    current_year = 2023
     expect(described_class.version_information).to match(/–#{current_year} /)
   end
 end