Tests fail with jekyll-github-metadata 2.15.0

[dleidert]

Describe the bug

I'm running the test with jekyll-github-metadata 2.15.0 and they fail. The issue seems to have been caused by this commit:
jekyll/github-metadata@a771d0d

This is the backtrace:

Randomized with seed 6998
...............................FFFFF............................      Remote Theme: {"foo"=>"bar"} is not a valid remote theme
.      Remote Theme: {"foo"=>"bar"} is not a valid remote theme
...To use retry middleware with Faraday v2.0+, install `faraday-retry` gem
...........

Failures:

  1) Jekyll::RemoteTheme Integration the pages-themes/primer theme requires dependencies
     Failure/Error: let(:index_contents) { File.read(index_path) }
     
     Errno::ENOENT:
       No such file or directory @ rb_sysopen - /tmp/jekyll-remote-theme/tmp/dest/index.html
     # ./spec/jekyll-remote-theme/integration_spec.rb:31:in `read'
     # ./spec/jekyll-remote-theme/integration_spec.rb:31:in `block (2 levels) in <top (required)>'
     # ./spec/jekyll-remote-theme/integration_spec.rb:62:in `block (3 levels) in <top (required)>'
     # /var/lib/gems/3.1.0/gems/webmock-3.18.1/lib/webmock/rspec.rb:37:in `block (2 levels) in <top (required)>'

  2) Jekyll::RemoteTheme Integration the pages-themes/primer theme returns a zero exit code
     Failure/Error: expect(status.exitstatus).to eql(0), output
     
         Logging at level: debug
           Jekyll Version: 4.3.2
       Configuration file: /tmp/jekyll-remote-theme/spec/fixtures/site/_config.yml
                Requiring: jekyll-remote-theme
                   Source: /tmp/jekyll-remote-theme/spec/fixtures/site
              Destination: /tmp/jekyll-remote-theme/tmp/dest
        Incremental build: disabled. Enable with --incremental
             Generating... 
                    Theme: pages-themes/primer
             Theme source: /tmp/jekyll-remote-theme-20230217-346821-wuf3gy
             Remote Theme: Using theme pages-themes/primer
             Remote Theme: Downloading https://codeload.github.com/pages-themes/primer/zip/HEAD to /tmp/jekyll-remote-theme-20230217-346821-cgmxtx.zip
             Remote Theme: Unzipping /tmp/jekyll-remote-theme-20230217-346821-cgmxtx.zip to /tmp/jekyll-remote-theme-20230217-346821-wuf3gy
                Requiring: jekyll-github-metadata
       To use retry middleware with Faraday v2.0+, install `faraday-retry` gem
       Dotenv not found. Skipping 
                Requiring: jekyll-seo-tag
                  Reading: /_layouts/default.html
                  Reading: /_layouts/home.html
                  Reading: /_layouts/page.html
                  Reading: /_layouts/post.html
              EntryFilter: excluded /.jekyll-cache
                  Reading: index.md
                  Reading: assets/css/style.scss
                           ------------------------------------------------
             Jekyll 4.3.2   Please append `--trace` to the `build` command 
                            for any additional information or backtrace. 
                           ------------------------------------------------
       /var/lib/gems/3.1.0/bundler/gems/github-metadata-388a7fe08aea/lib/jekyll-github-metadata/site_github_munger.rb:100:in `block in <module:GitHubMetadata>': undefined method `inject_metadata!' for nil:NilClass (NoMethodError)
     
             SiteGitHubMunger.global_munger.inject_metadata!(payload)
                                           ^^^^^^^^^^^^^^^^^
       	from /var/lib/gems/3.1.0/gems/jekyll-4.3.2/lib/jekyll/hooks.rb:103:in `block in trigger'
       	from /var/lib/gems/3.1.0/gems/jekyll-4.3.2/lib/jekyll/hooks.rb:102:in `each'
       	from /var/lib/gems/3.1.0/gems/jekyll-4.3.2/lib/jekyll/hooks.rb:102:in `trigger'
       	from /var/lib/gems/3.1.0/gems/jekyll-4.3.2/lib/jekyll/site.rb:208:in `render'
       	from /var/lib/gems/3.1.0/gems/jekyll-4.3.2/lib/jekyll/site.rb:80:in `process'
       	from /var/lib/gems/3.1.0/gems/jekyll-4.3.2/lib/jekyll/command.rb:28:in `process_site'
       	from /var/lib/gems/3.1.0/gems/jekyll-4.3.2/lib/jekyll/commands/build.rb:65:in `build'
       	from /var/lib/gems/3.1.0/gems/jekyll-4.3.2/lib/jekyll/commands/build.rb:36:in `process'
       	from /var/lib/gems/3.1.0/gems/jekyll-4.3.2/lib/jekyll/command.rb:91:in `block in process_with_graceful_fail'
       	from /var/lib/gems/3.1.0/gems/jekyll-4.3.2/lib/jekyll/command.rb:91:in `each'
       	from /var/lib/gems/3.1.0/gems/jekyll-4.3.2/lib/jekyll/command.rb:91:in `process_with_graceful_fail'
       	from /var/lib/gems/3.1.0/gems/jekyll-4.3.2/lib/jekyll/commands/build.rb:18:in `block (2 levels) in init_with_program'
       	from /var/lib/gems/3.1.0/gems/mercenary-0.4.0/lib/mercenary/command.rb:221:in `block in execute'
       	from /var/lib/gems/3.1.0/gems/mercenary-0.4.0/lib/mercenary/command.rb:221:in `each'
       	from /var/lib/gems/3.1.0/gems/mercenary-0.4.0/lib/mercenary/command.rb:221:in `execute'
       	from /var/lib/gems/3.1.0/gems/mercenary-0.4.0/lib/mercenary/program.rb:44:in `go'
       	from /var/lib/gems/3.1.0/gems/mercenary-0.4.0/lib/mercenary.rb:21:in `program'
       	from /var/lib/gems/3.1.0/gems/jekyll-4.3.2/exe/jekyll:15:in `<top (required)>'
       	from /usr/local/bin/jekyll:25:in `load'
       	from /usr/local/bin/jekyll:25:in `<main>'
             Remote Theme: Cleaning up /tmp/jekyll-remote-theme-20230217-346821-wuf3gy
     # ./spec/jekyll-remote-theme/integration_spec.rb:40:in `block (3 levels) in <top (required)>'
     # /var/lib/gems/3.1.0/gems/webmock-3.18.1/lib/webmock/rspec.rb:37:in `block (2 levels) in <top (required)>'

  3) Jekyll::RemoteTheme Integration the pages-themes/primer theme uses the theme
     Failure/Error: let(:index_contents) { File.read(index_path) }
     
     Errno::ENOENT:
       No such file or directory @ rb_sysopen - /tmp/jekyll-remote-theme/tmp/dest/index.html
     # ./spec/jekyll-remote-theme/integration_spec.rb:31:in `read'
     # ./spec/jekyll-remote-theme/integration_spec.rb:31:in `block (2 levels) in <top (required)>'
     # ./spec/jekyll-remote-theme/integration_spec.rb:53:in `block (3 levels) in <top (required)>'
     # /var/lib/gems/3.1.0/gems/webmock-3.18.1/lib/webmock/rspec.rb:37:in `block (2 levels) in <top (required)>'

  4) Jekyll::RemoteTheme Integration the pages-themes/primer theme build the index
     Failure/Error: expect(index_path).to be_an_existing_file
       expected "/tmp/jekyll-remote-theme/tmp/dest/index.html" to be an existing file
     # ./spec/jekyll-remote-theme/integration_spec.rb:48:in `block (3 levels) in <top (required)>'
     # /var/lib/gems/3.1.0/gems/webmock-3.18.1/lib/webmock/rspec.rb:37:in `block (2 levels) in <top (required)>'

  5) Jekyll::RemoteTheme Integration the pages-themes/primer theme builds stylesheets
     Failure/Error: expect(stylesheet_path).to be_an_existing_file
       expected "/tmp/jekyll-remote-theme/tmp/dest/assets/css/style.css" to be an existing file
     # ./spec/jekyll-remote-theme/integration_spec.rb:57:in `block (3 levels) in <top (required)>'
     # /var/lib/gems/3.1.0/gems/webmock-3.18.1/lib/webmock/rspec.rb:37:in `block (2 levels) in <top (required)>'

Finished in 6.83 seconds (files took 0.47517 seconds to load)
79 examples, 5 failures

Failed examples:

rspec ./spec/jekyll-remote-theme/integration_spec.rb:60 # Jekyll::RemoteTheme Integration the pages-themes/primer theme requires dependencies
rspec ./spec/jekyll-remote-theme/integration_spec.rb:39 # Jekyll::RemoteTheme Integration the pages-themes/primer theme returns a zero exit code
rspec ./spec/jekyll-remote-theme/integration_spec.rb:51 # Jekyll::RemoteTheme Integration the pages-themes/primer theme uses the theme
rspec ./spec/jekyll-remote-theme/integration_spec.rb:47 # Jekyll::RemoteTheme Integration the pages-themes/primer theme build the index
rspec ./spec/jekyll-remote-theme/integration_spec.rb:56 # Jekyll::RemoteTheme Integration the pages-themes/primer theme builds stylesheets

Randomized with seed 6998

The tests run fine with version 2.13.0.

Steps to reproduce the behavior

Just run rspec with jekyll-github-metadata 2.15.0.

Expected behavior

The tests should succeed.

Screenshots

n/a

Additional context

n/a

[dleidert]

@benbalter Do you see a chance to look at this?