Scanner & parser ready
A YAML 1.1 scanner and parser following Psych’s event model — documents, mappings, sequences, scalars in plain / single / double / literal / folded styles, and the directive and document markers.
go-ruby-yaml is a pure-Go (no cgo) reimplementation of Ruby's Psych YAML library — a Dump emitter and a Load / SafeLoad loader that match reference Ruby's serialization byte-for-byte. It round-trips Ruby values through YAML the way Psych does: anchors and aliases for shared and cyclic structure, the !ruby/object: and related Ruby tags, Symbol / Time / Range / bignum scalars, and both block and flow styles. It was extracted from rbgo's prelude/internals into a reusable standalone library: no dependency on the Ruby runtime, the dependency runs the other way. It is the YAML backend for go-embedded-ruby, bound by rbgo as a native module just like go-ruby-regexp and go-ruby-erb — differential-tested against MRI, 100% coverage, CI green across 6 arches and 3 OSes.
Dump emitter ready
Dump(v) emits Psych-compatible YAML: block style by default with flow where Psych uses it, correct scalar quoting, and stable key ordering — matching reference Ruby’s output byte-for-byte.
Load & SafeLoad ready
Load(s) builds the full Ruby value graph; SafeLoad restricts to the safe scalar/collection subset, refusing arbitrary !ruby/object: instantiation exactly as Psych’s safe loader does.
Anchors, aliases & Ruby tags ready
Anchors &a and aliases *a for shared and cyclic structure, plus the !ruby/object:, !ruby/symbol, !ruby/range and related tags round-tripped the way Psych writes and reads them.
Ruby scalar types ready
Symbol, Time, Range and arbitrary-precision bignum scalars emitted and parsed with Psych’s tag and formatting conventions.
Differential oracle & coverage ready
A wide value corpus dumped and loaded both here and by the system ruby/Psych, compared byte-for-byte; 100% coverage, gofmt + go vet clean, green across all six 64-bit Go arches and three OSes.
- ready capability complete (exit criteria met, nothing material left)
- active in progress (substantial work shipped, not yet finished)
- planned not started yet (or downstream by design)
A faithful port of Ruby's Psych emitter and loader in pure Go, cgo disabled, so it cross-compiles and embeds anywhere. It emits and parses anchors and aliases, the !ruby/object: Ruby tags, Symbol / Time / Range / bignum scalars, and block and flow styles. Validated differentially against the system ruby binary — emitted YAML and loaded values compared against Psych. It is a standalone, reusable module extracted from rbgo's internals, and the YAML backend for the sibling org github.com/go-embedded-ruby.