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In #19680 we added support for automatically ignoring files in the `outDir` directory as specified in the TSconfig compiler options (as these files were likely duplicates of `.ts` file we were already scanning). However, in some cases people put `outDir: "."` or even `outDir: ".."` in their configuration, which had the side effect of excluding _all_ files, leading to a failed extraction. With the changes in this PR, we now ignore any `outDir`s that are not properly contained within the source root of the code being scanned. This should prevent the files from being extracted, while still allowing us to not double-scan files in, say, a `.github` directory, as seen in some Actions workflows.
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 the MIT License by GitHub. Some code is derived from other projects, whose licenses are noted in other LICENSE-*.md files in this folder.