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Changelog for IgniterCss 0.2.0

Breaking changes:

  • The Python/tinycss2 implementation is gone, along with the pythonx dependency, priv/python, plibs/ and rebuild_wheel.sh. Everything is now a precompiled Rust NIF built on Biome's lossless CSS CST — no Python, no Node, no external process.
  • IgniterCss.CSS.CssProcessor has been removed. Its pipeline mixed codemods with whole-file rewriting, which the new design keeps deliberately separate: use IgniterCss for patching and IgniterCss.Transform for build-time output.
  • IgniterCss.Parsers.Parser keeps its function names and its {:ok, :function_name, result} shape, but the mutating functions are now diff-minimal rather than reprinting the stylesheet, and selector matching is strict: an ambiguous selector is an error instead of an arbitrary choice.

Features:

  • New IgniterCss API: ensure_at_rule/3, ensure_rule/4, set_declaration/5, remove_declaration/4, remove_rule/3, replace_rule_body/4, append_raw_to_rule/4, add_vendor_prefixes/4, sort_properties/2, remove_duplicates/2, plus read-only queries and analysis.
  • New IgniterCss.Codemods — Igniter-facing wrappers that take and return an Igniter struct, so callers get the normal diff preview and confirmation flow.
  • New IgniterCss.Transform for whole-file minify/2, beautify/2 and merge_stylesheets/2, held separate from the codemods.
  • Tailwind v4 support: @theme, @plugin (with and without a block), @source, @custom-variant, @variant, @utility, @apply, @reference.

Improvements:

  • Comments are preserved by construction: operations splice byte ranges into the original source instead of reprinting the tree, so text outside an edit cannot change.
  • Every operation is idempotent and reports changed: false on a re-run.
  • Files that cannot be patched safely — an unbalanced brace, a parse that does not reproduce the input byte for byte — are refused rather than half-edited.
  • Inserted text follows the file's own newline style, indent unit and trailing newline; BOM and CRLF files round-trip.
  • Precompiled NIFs, so end users need no Rust toolchain.

Changelog for IgniterCss 0.1.1

Improvements:

  • fix(css): improve CSS comment validation and update css_tools to v0.1.2

Changelog for IgniterCss 0.1.0

Features:

  • feat(css): add CSS parser with AST transformation support #1

v1.0.0 (2026-09-06)

Breaking Changes:

  • replace the Python CSS implementation with a Rust NIF (#38) by Shahryar Tavakkoli

Features:

  • ensure_at_rule_block/5 and AtRule.body, and fix three transform defects (#41) by Shahryar Tavakkoli

Bug Fixes:

  • contain parser panics and stack overflows, and decide from the CST (#39) by Shahryar Tavakkoli