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This introduces tooling and enforcement for formatting bazel files. The tooling is provided as a bazel run target from [keith/buildifier-prebuilt](https://github.com/keith/buildifier-prebuilt). This is used in a [`pre-commit`](https://pre-commit.com/) hook for those having that installed. In turn this is used in a CI check. Relying on a `pre-commit` action gives us easy checking that buildifying did not change anything in the files and printing the diff, without having to hand-roll the check ourselves. This enforcement will make usage of gazelle easier, as gazelle itself might reformat files, even outside of `go`. Having them properly formatted will allow gazelle to leave them unchanged, without needing to configure awkward exclude directives.
JavaScript extractor
This directory contains the source code of the JavaScript extractor. The extractor depends on various libraries that are not currently bundled with the source code, so at present it cannot be built in isolation.
The extractor consists of a parser for the latest version of ECMAScript, including a few proposed and historic extensions (see src/com/semmle/jcorn), classes for representing JavaScript and TypeScript ASTs (src/com/semmle/js/ast and src/com/semmle/ts/ast), and various other bits of functionality. Historically, the main entry point of the JavaScript extractor has been com.semmle.js.extractor.Main. However, this class is slowly being phased out in favour of com.semmle.js.extractor.AutoBuild, which is the entry point used by CodeQL.
License
Like the CodeQL queries, the JavaScript extractor is licensed under Apache License 2.0 by GitHub. Some code is derived from other projects, whose licenses are noted in other LICENSE-*.md files in this folder.