Go extractor does not support build-mode: none, preventing overlay/incremental analysis on PRs #3796
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URL: http://github.com/github/codeql-action/issues/3796
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Problem
The Go extractor (CodeQL CLI 2.25.1) does not support
build-mode: none:This means Go cannot benefit from overlay/incremental analysis on pull requests. JavaScript gets this automatically — in our monorepo we see
Overlay filter removed 4311 out of 4312 files from extractionon JS PRs, reducing a full extraction to just the changed files. Go still does a full extraction of every package on every PR (~2.5 min for autobuild + ~1.5 min for analysis in a large monorepo).Current workaround
We use legacy env var hacks to skip the actual
go build:This avoids compilation but still runs full type extraction for every Go package on every PR.
Expected behavior
Setting
build-mode: noneshould work for Go, enabling overlay/incremental analysis on PRs (as it already does for JavaScript/TypeScript). The Go extractor already has a buildless/standalone extraction path (DEPRECATED: Use --build-mode none insteadappears in the extractor options for thebuildlessflag), so the extraction capability exists — it just isn't wired up to acceptbuild-mode: none.Additional context
trap.cache.*options incodeql-extractor.yml, so TRAP caching is also unavailable for Go.