Unambiguous abbreviations ready
Given a set of words, every prefix that identifies exactly one word plus each full word; a prefix shared by two or more words never appears, and each full word always maps to itself.
go-ruby-abbrev is a pure-Go (no cgo) reimplementation of Ruby's abbrev standard library — MRI's Abbrev.abbrev and the Array#abbrev core extension. Given a set of words it computes the set of unambiguous abbreviations: every prefix that identifies exactly one word, plus each full word. It is a faithful, byte-for-byte port of upstream abbrev.rb (Akinori MUSHA), reproducing MRI's edge cases — ambiguous prefixes dropped, empty/duplicate words, a literal (not pattern) prefix filter, and multibyte words split on characters — without any Ruby runtime. It is bound into go-embedded-ruby 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.
Optional prefix filter ready
Abbrev(words, prefix) keeps only words starting with prefix. The prefix is a literal string, not a pattern — MRI anchors it as /\A<quoted>/ — so Abbrev(["a.b", "axb"], "a.") matches only "a.b".
Both Ruby entry points ready
The idiomatic Go shape of both Abbrev.abbrev(words[, prefix]) and the Array#abbrev core extension (words.abbrev), collapsed into a single Abbrev(words, prefix...) with a variadic optional prefix.
MRI edge cases ready
Empty words contribute no prefixes but still map to themselves; duplicate words collapse; multibyte words split on characters, not bytes, matching Ruby’s String#[] — so Abbrev(["café", "cane"]) includes "caf".
Differential oracle & coverage ready
Deterministic, runtime-free cases drive coverage to 100%, plus a differential oracle that runs the same inputs through the live ruby binary (Abbrev.abbrev) and asserts byte-identical maps; gofmt + go vet clean, green across six 64-bit 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 abbrev standard library in pure Go, cgo disabled, so it cross-compiles and embeds anywhere. Given a word list it computes every unambiguous prefix plus each full word, reproducing MRI's edge cases — ambiguous prefixes dropped, empty and duplicate words, a literal-string (not pattern) prefix filter, and multibyte words split on characters. Validated differentially against the system ruby binary (Abbrev.abbrev). It is a standalone, reusable module bound into the sibling org github.com/go-embedded-ruby.