Drop external tools: vectory is now pure Ruby (0.11.0)

[ronaldtse]

Summary

Vectory no longer shells out to Inkscape, Ghostscript, or any external binary. All conversions are pure Ruby:

• SVG ↔ EMF: emfsvg
• EPS/PS ↔ SVG: postsvg
• Cross-format (e.g. Eps → Ps): two-step via SVG intermediate

Dimensions come from format-native metadata (SVG attributes/viewBox, EMF header bounds, EPS/PS %%BoundingBox). No Inkscape query calls.

BREAKING: PDF support removed. Vectory::Pdf, *.to_pdf, and related infrastructure are gone. Vectory is now SVG/EPS/PS/EMF only. The library is no longer a wrapper around external tools — it is a pure-Ruby pairwise vector converter.

Bumps to 0.11.0 (minor: pre-1.0 semver treats breaking changes as minor).

Deleted

• lib/vectory/pdf.rb
• lib/vectory/inkscape_wrapper.rb
• lib/vectory/ghostscript_wrapper.rb
• lib/vectory/platform.rb (only used by wrappers)
• lib/vectory/conversion.rb + lib/vectory/conversion/*.rb (strategy registry for external tools)
• Ukiryu runtime dependency (only used by wrappers)
• Errors: InkscapeNotFoundError, GhostscriptNotFoundError, InkscapeQueryError
• CLI status codes for those errors
• Configuration: inkscape_path, ghostscript_path accessors and their env-var loaders
• spec/vectory/pdf_spec.rb, spec/vectory/inkscape_wrapper_spec.rb

Rewired

• Svg#to_eps, Svg#to_ps: now Postsvg.to_eps/to_ps
• Eps#to_ps, Eps#to_emf, Ps#to_eps, Ps#to_emf: now via SVG intermediate (no PDF)
• Emf#to_eps, Emf#to_ps: now via SVG intermediate (no Inkscape)
• Emf#height/width: from Emf.parse(content).header.bounds
• Svg#height/width: width/height attr → viewBox → NotImplementedError
• Vector#height/width fallback: now raises NotImplementedError (was: Inkscape)

Added

• scripts/regenerate_fixtures.rb — one-shot script to regenerate all spec/examples/*/ref.* via the new pipeline

Test plan

• bundle exec rspec — 170/170 pass (was 193; removed 23 stale tests for Inkscape/Ghostscript/PDF error paths and PDF class itself)
• Test fixtures regenerated via the new pipeline
• Pre-existing rubocop warnings unchanged (svg_mapping.rb A-z range, gemspec mfa/test_files)

Caveats

postsvg and emfsvg have known upstream limitations:

• postsvg: no text/font rendering, no image embedding, no gradients/patterns, no CMYK, no PS Level 2/3 advanced ops
• emfsvg: SVG → EMF covers a smaller subset than EMF → SVG

EPS/PS/SVG files using those features will silently degrade. Acceptable for vectory's test fixtures (verified by the regeneration script). Real-world users with complex files may see regressions vs the old Ghostscript + Inkscape path; track upstream postsvg/emfsvg to know when coverage improves.