[simonchrz]

Adds terraform as a local type, following the definition proposed in package-url/purl-spec#889, the way bsd follows purl-spec#496.

Without it MakePURLString("terraform", "hashicorp/random", "3.6.0") escapes the slash: pkg:terraform/hashicorp%2Frandom@3.6.0. git-pkgs/proxy#688 (a Terraform provider mirror) builds its PURLs with purl.New to get around that; with this change it can use the shared helpers.

Changes

• types.json: terraform with namespace_requirement: required and default_registry: https://registry.terraform.io, from the draft definition.
• splitNamespace splits a Terraform address without its hostname at its last slash:
  • provider hashicorp/random → pkg:terraform/hashicorp/random
  • module hashicorp/consul/aws → pkg:terraform/hashicorp/consul/aws, which is how the existing parse tests already read it (namespace hashicorp/consul, name aws)
  • a name without a namespace, with a leading slash or with an empty segment returns "", since the type requires a namespace
  • an address with a registry hostname (a dot in its first segment, such as registry.terraform.io/hashicorp/random) or with more than three segments returns "" too
• A provider's namespace and type are lowercased, as Terraform folds their case. A module keeps its case. The draft marks everything case-sensitive; that is queried in the review on purl-spec#889.
• spec_test.go lists the local type allowance, and the README describes it next to bsd.

The draft's module example (pkg:terraform/terraform-aws-modules/vpc@6.0.1) leaves the target system out, which this code reads as a provider. types.json uses pkg:terraform/hashicorp/consul/aws@0.11.0 instead, the module form the parser already accepts.

Tests

TestBuildPURLString and TestBuildPURLStringMatchesMakePURL cover a provider, a module, case, the default registry being dropped, another registry kept as repository_url, and the rejected names. terraform_test.go checks the provider case folding and the module case through Parse, New and the helpers. TestIsKnownType, TestDefaultRegistry and TestNamespaceRequirement include the type. The new split was mutation-checked.

Summary by CodeRabbit

• New Features
  • Added support for Terraform provider and module package URLs. Provider names are normalized to lowercase, while module name casing is preserved.
  • Set https://registry.terraform.io as the default registry; alternate registries are supported.
• Bug Fixes
  • Terraform addresses with registry hostnames, empty segments, or extra path segments are rejected.
• Documentation
  • Added Terraform address formats, casing rules, and registry details.

[coderabbitai]

No actionable comments were generated in the recent review.

Walkthrough

The PURL type metadata now includes Terraform providers and modules. Terraform address parsing, case handling, and registry output are covered by implementation changes, tests, and documentation.

Changes: Terraform PURL support

Layer / File(s)	Summary
Terraform type metadata ecosystem.go, types.json, types_test.go, spec_test.go, README.md	The metadata and tests recognize Terraform, set https://registry.terraform.io as its default registry, and require a namespace. The documentation describes provider and module mappings and case handling.
Address parsing and PURL output makepurl.go, purl.go, makepurl_test.go, terraform_test.go	Terraform addresses with two or three non-empty segments are accepted unless the first segment contains a dot. Provider names are lowercased, while module paths preserve case. Tests cover invalid addresses and default and OpenTofu registry handling.

Estimated code review effort: 2 (Simple) | ~12 minutes

Change: Feature

Suggested reviewers: andrew

Merge Risk: Minimal · up to 01578

This adds Terraform as a package URL type with address validation and case handling. The change is limited to Terraform inputs and has test coverage, so merge risk is minimal.

Security architecture risk: Minimal · up to 01578

The inspected changes are confined to package-identifier construction and normalization. They introduce no demonstrated weakening of security, failure containment, rollback, or ownership guarantees. Registry access and authorization remain responsibilities of callers.

Retained concerns
No architecture-level concerns identified.

Security review details

Security Blast Radius

• inferred — The directly inspected exposure is caller-supplied identifier and registry strings becoming PURL values and registry classifications. These paths perform string and object transformations rather than registry requests, credential operations, or authorization changes. Further impact depends on downstream uses not available in this checkout.

Trust Boundaries and Controls

• observed — The Terraform splitter provides structural checks for native-address constructors, not registry authentication or an origin allowlist. Parse delegates initial parsing to packageurl.FromString, while New explicitly ignores normalization errors. These APIs should not be interpreted as establishing an authenticated package origin.

Pre-merge checks: 4

Check name	Status	Explanation
Title check		The title names the main change: adding the terraform package type proposed in purl-spec#889. The changeset adds the terraform type to types.json, the ecosystem constant, the splitting and case-handli…
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.

Full details: Title check

Explanation

The title names the main change: adding the terraform package type proposed in purl-spec#889. The changeset adds the terraform type to types.json, the ecosystem constant, the splitting and case-handling logic, and tests. The title is specific and concise, and it does not describe anything absent from the changeset.

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Files selected for processing: 6

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Actionable comments posted: 1

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Inline comments:
Review comments at @makepurl.go:
- Line 279: Update the namespace validation guard used by BuildPURLString to
reject leading slashes and empty address segments before normalization, so
inputs such as //random and hashicorp//random fail instead of producing a PURL;
add regression cases for both inputs.

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[andrew]

Thanks for this. The type belongs here alongside bsd, and the split matches the existing parse tests. Two things change which PURLs the helpers emit, so they need settling before the proxy starts storing them.

Addresses with a registry hostname produce a wrong PURL. splitTerraform splits at the last slash and accepts any number of segments, so registry.terraform.io/hashicorp/random (the form .terraform.lock.hcl writes) becomes pkg:terraform/registry.terraform.io/hashicorp/random, which reads back as a module. Terraform rejects dots in provider parts, so a dot in the first segment marks a hostname. Please reject those, the way swift rejects URL paths, and reject anything with more than three segments, with test cases for both.

Provider case. Terraform case-folds provider namespace and type (terraform-registry-address runs them through idna.Lookup), so HashiCorp/Random and hashicorp/random are one provider but two PURLs here, and the terraform case-sensitive test pins that. Modules do keep their case in Terraform. Please lowercase two-segment addresses and keep three-segment ones as given. The draft marks everything case-sensitive, but that is already queried in the review on purl-spec#889.

Smaller:

• makepurl.go: the splitTerraform comment was inserted between splitVSCodeExtension's doc comment and its func, so the VS Code line now heads the Terraform block and splitVSCodeExtension has none. Move splitTerraform below it, and cut its comment to the first two lines; the last sentence restates the guard.
• types.json: the example pkg:terraform/terraform-aws-modules/vpc@6.0.1 is the draft's two-segment module form, which this code treats as a provider. Replace it with pkg:terraform/hashicorp/consul/aws@0.11.0 to match the README and the parse tests.

[simonchrz]

Done in 015783f.

• An address with a dot in its first segment, or with more than three segments, is rejected. Test cases cover registry.terraform.io/hashicorp/random, the module form with a hostname, example.com/random and four segments.
• Two-segment addresses are lowercased and three-segment ones keep their case. That sits in lowercaseCaseInsensitive, so Parse and New fold a provider the same way as the helpers, like vscode-extension. terraform_test.go checks both forms through all of them.
• splitTerraform moved below splitVSCodeExtension, with the shorter comment.
• The types.json example is now pkg:terraform/hashicorp/consul/aws@0.11.0.