bazel/website: Add tests

[Copilot]

The website builder (bazel/website/) is intended to be generator-agnostic but lacks tests to validate this design. This adds comprehensive test coverage and documents the current state of generator-agnostic support.

Test Infrastructure

• //website/tests:website_generation_test - Validates basic website generation with Pelican
• //website/tests:website_parameterized_test - Tests custom exclude patterns and mappings
• Shell test harness verifies tarball structure and HTML output

Run with: cd bazel && bazel test //website/tests/...

Fixtures

Minimal test content, theme, and Pelican config demonstrating the macro interface:

static_website(
    name = "test_basic_website",
    content = ":test_content",
    theme = ":test_theme",
    config = ":test_config.py",
    mappings = {},  # Empty mappings work
    # generator = ... # Customizable
)

Generator-Agnostic Analysis

Already flexible:

• Generator parameter accepts any Bazel target
• Simple interface: generator receives content path, outputs to configured location
• All parameters (exclude, mappings, paths) are overridable

Pelican-specific defaults:

• exclude list includes Pelican artifacts: archives.html, authors.html, categories.html, tags.html
• mappings assume Pelican theme structure: theme/css → theme/static/css

Tests demonstrate these can be overridden. Future generators can either override these parameters or use a generator-specific wrapper (e.g., pelican_website()) that sets appropriate defaults while keeping static_website() generic.

See bazel/website/tests/README.md for detailed findings and recommendations.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• mirror.bazel.build
  • Triggering command: /build/bazel_root/install/fb2a7f6d344d2f4e335882534df59296/embedded_tools/jdk/bin/java bazel(bazel) --add-opens=java.base/java.lang=ALL-UNNAMED -Xverify:none -Djava.util.logging.config.file=/build/bazel_root/base/javalog.properties -Dcom.google.devtools.build.lib.util.LogHandlerQuerier.class=com.google.devtools.build.lib.util.SimpleLogHandler$HandlerQuerier -XX:-MaxFDLimit -Djava.library.path=/build/bazel_root/install/fb2a7f6d344d2f4e335882534df59296/embedded_tools/jdk/lib:/build/bazel_root/install/fb2a7f6d344d2f4e335882534df59296/embedded_tools/jdk/lib/server:/build/bazel_root/install/fb2a7f6d344d2f4e335882534df59296/ -Dfile.encoding=ISO-8859-1 -Duser.country= -Duser.language= -Duser.variant= -Djavax.net.ssl.trustStore=/tmp/custom-cacerts -Djavax.net.ssl.trustStorePassword=changeit -jar /build/bazel_root/install/fb2a7f6d344d2f4e335882534df59296/A-server.jar --max_idle_secs=10800 --noshutdown_on_low_sys_mem --connect_timeout_secs=30 --output_user_root=/build/bazel_root --install_base=/build/bazel_root/install/fb2a7f6d344d2f4e335882534df59296 (dns block)
• www.googleapis.com
  • Triggering command: /usr/local/bin/bazel bazel shutdown (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

this repo has a bazel website builder - the idea is that its agnostic to the generator - with the default being python pelican

not sure how well it meets this criteria atm - but it will need to - i want to add a different generator in a later iteration (ie out of scope for this task)

mostly right now im more interested in adding some bazel tests for the current setup (and fixing anything that makes it non-agnostic atm)

im not great with bazel tests - ive always found them confused/confusing about whether they are testing rule or target - but either way this website generator is used in a few places (envoyproxy/envoy-website, envoyproxy/apt) so really i want to get some testing on it before hacking

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