Revision: Add helper method for comparison to Revision.NULL

When Error Prone checks are enabled, comparing to Revision.NULL
with the == or != operator results in a warning:

  [ReferenceEquality] Comparison using reference equality instead of value equality

The NULL instance is used as a sentinel, so comparing with reference
equality is correct.

Rather than suppressing the warning at every place in the code, add
a helper method that can be used, and suppress the warning only there.

Note that the "ReferenceEquality" warning is Error Prone specific and
suppressing it results in an "Unsupported @SuppressWarnings" warning.

Change-Id: Ia50404f76f88c405b9298a645760c019384c92ff
7 files changed
tree: 92c6fccc1aa30e614c3c9bfcefb1e594ebf3a6b2
  1. .bazelrc
  2. .gitignore
  3. .mailmap
  4. .settings/
  5. BUILD
  6. COPYING
  7. Documentation/
  8. README.md
  9. WORKSPACE
  10. fake_pom_deploy.xml
  11. java/
  12. javatests/
  13. lib/
  14. navbar.md
  15. resources/
  16. tools/
  17. version.bzl
README.md

Gitiles - A simple JGit repository browser

Gitiles is a simple repository browser for Git repositories, built on JGit. Its guiding principle is simplicity: it has no formal access controls, no write access, no fancy Javascript, etc.

Gitiles automatically renders *.md Markdown files into HTML for simplified documentation. Refer to the Markdown documentation for details.

Configuration

Gitiles is configurable in a git-style configuration file named gitiles.config. Refer to the configuration documentation for details.

Bugs

Use the issue tracker at github to file bugs.

Contributing to Gitiles

Please refer to the Developer Guide.