chore: move to github.com/pb33f/go-yaml

[daveshanley]

Stacked on #641. Review and merge that PR first. This diff shows only the migration.

libopenapi moves from go.yaml.in/yaml/v4 v4.0.0-rc.6 to github.com/pb33f/go-yaml v0.1.0, pb33f's maintained fork. The fork is upstream's main plus the emitter event-queue fix (pb33f/go-yaml#1), under a new module path (pb33f/go-yaml#2).

jsonpath, ordered-map and testify pass yaml.Node values across their APIs, so they are moving to the same module:

module	PR	required here
github.com/pb33f/testify	pb33f/testify#4 (merged)	pseudo-version of master 5ea68ea
github.com/pb33f/ordered-map/v2	pb33f/ordered-map#4 (merged)	pseudo-version of master 68eb83f
github.com/pb33f/jsonpath	pb33f/jsonpath#8 (open)	pseudo-version of its PR branch, 26d48cf

Before merging: merge jsonpath#8, tag all three, then replace the pseudo-versions in go.mod with the tags. go mod graph no longer contains go.yaml.in/yaml/v4 at all.

Changes

• Import paths. go.yaml.in/yaml/v4 becomes github.com/pb33f/go-yaml in 455 files. The package name is still yaml, so no code referencing it changes.
  • Imports were re-sorted with gofmt. Three files that weren't gofmt-clean on main were left unformatted; two of them had their import line moved by hand.
• RenderWithIndention. The fork removed Dumper.SetIndent. Its replacement, WithIndent, rejects indents outside 2 to 9.
  • rc.6 accepted any indent and the emitter quietly used 2 instead. OriginalIndentation can be 0, e.g. for minified JSON.
  • RenderWithIndention now clamps those values to 2 itself, so output is unchanged.
  • A negative indent used to panic in SetIndent. It now renders with 2 as well.
  • New test: TestDocument_RenderWithIndention_OutOfRange.
• TestDocument_RenderAndReload_ChangeCheck_Stripe now expects 0 changes instead of 9.
  • rc.6 re-emitted some folded (>) block scalars with a spurious trailing blank line. The reloaded Stripe spec therefore showed 9 description changes against the original.
  • Upstream fixed this after rc.6, so Stripe now round-trips with no changes.
• Comments and AGENTS.md no longer name yaml v4.

Output changes

A golden harness hashes every public output for all 72 spec fixtures. It covers:

• Render, RenderInline and RenderJSON
• Per-schema inline renders
• Bundles and composed bundles
• what-changed reports

Compared with #641, 69 fixtures are byte-identical. The other three change for the same reason, the folded-scalar fix described above: rc.6 added a blank line after some folded block scalars, and the new output drops it, which now matches the source files. The three are:

• test_specs/minimal_remote_refs/openapi.yaml
• test_specs/minimal_remote_refs/schemas/components.openapi.yaml
• test_specs/redocly-starter.yaml

Tests

• go build ./..., go vet ./... and go test ./... pass.
• The generator round-trip tests pass against the real module versions.

🤖 Generated with Claude Code