Guardrails / golang

Go module checksums are committed

golang/checksums-committed@v1

The module commits go.sum, so every module a build downloads is checked against the checksum the commit recorded.

Id	golang/checksums-committed
Version	v1
Category	golang
Default severity	warning
Interpreter	python3
Timeout	30 seconds
Violations tolerated	0
Collects	golang

Collectors

This guardrail gathers nothing itself. It depends on the collectors below, which the CLI runs once per build before any check, and reads what they found out of GUARDRAIL_FACTS. A collector that collects nothing skips this guardrail rather than failing it.

Collector	Gathers	Inputs it is given
golang	The Go build in the project directory: the module it declares, the Go version it asks for, every module of a workspace, the modules it requires directly and indirectly, and the replacements and lock file beside them.	projectDir

The inputs above are this guardrail's own, passed straight through. Configuring one in buildnote.json changes what is collected, and two guardrails configured the same way share the one collection.

Configuration

{
  "guardrails": {
      "failOn": "error",
      "comment": true,
      "checks": [
          {
              "use": "golang/checksums-committed@v1",
              "severity": "warning",
              "with": {
                  "projectDir": "."
              },
              "exemptions": []
          }
      ]
  }
}

Inputs

Input	Description	Default	Environment variable
projectDir	Directory holding the project, relative to the directory the CLI runs in.	.	GUARDRAIL_INPUT_PROJECTDIR

How to fix

Commit the checksum file the module tooling writes:

go mod tidy
git add go.sum

go.sum carries the checksum of every module in the graph, so without it nothing verifies that what a build downloaded is what the module authors published and a swapped or rewritten version reaches the binary unnoticed.

More in golang

• golang/no-local-replacements. No replace directive redirects a module to a filesystem path, so the build reads only source the checkout carries.
• golang/toolchain-pinned. The module names the toolchain that compiles it, rather than leaving the go directive as a floor.
• golang/version-declared. The module declares the Go version it is built against, and that version is no older than the configured floor.

All 4 golang guardrails