From 7fa60d9b077502a5f38f5b585a398129c35e1f63 Mon Sep 17 00:00:00 2001 From: Timothy DeHerrera Date: Sat, 24 Jan 2026 21:07:56 -0700 Subject: [PATCH] feat: add CSS minification via lightningcss MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit - Cargo.toml: Add lightningcss 1.0.0-alpha.70 dep - src/css.rs: New module with minify_css() function. Uses StyleSheet::parse() + minify() + to_css() pipeline. 3 unit tests: whitespace removal, comment removal, selector merge. - src/main.rs: Integrate minification into copy_static_assets(). CSS files minified before writing; size delta logged. Result: style.css 5670→4165 bytes (~27% smaller) --- Cargo.lock | 787 +++++++++++++++++++++++++++++++++++++++++++++++++++- Cargo.toml | 3 + src/css.rs | 80 ++++++ src/main.rs | 37 ++- 4 files changed, 893 insertions(+), 14 deletions(-) create mode 100644 src/css.rs diff --git a/Cargo.lock b/Cargo.lock index 918e2f3..ccdcc60 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -2,6 +2,17 @@ # It is not intended for manual editing. version = 4 +[[package]] +name = "ahash" +version = "0.7.8" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "891477e0c6a8957309ee5c45a6368af3ae14bb510732d2684ffa19af310920f9" +dependencies = [ + "getrandom 0.2.17", + "once_cell", + "version_check", +] + [[package]] name = "ahash" version = "0.8.12" @@ -9,6 +20,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "5a15f179cd60c4584b8a8c596927aadc462e27f2ca70c04e0071964a73ba7a75" dependencies = [ "cfg-if", + "getrandom 0.3.4", "once_cell", "version_check", "zerocopy", @@ -35,12 +47,67 @@ version = "0.5.1" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "7d902e3d592a523def97af8f317b08ce16b7ab854c1985a0c671e6f15cebc236" +[[package]] +name = "base64-simd" +version = "0.7.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "781dd20c3aff0bd194fe7d2a977dd92f21c173891f3a03b677359e5fa457e5d5" +dependencies = [ + "simd-abstraction", +] + [[package]] name = "bitflags" version = "2.10.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "812e12b5285cc515a9c72a5c1d3b6d46a19dac5acfef5265968c166106e31dd3" +[[package]] +name = "bitvec" +version = "1.0.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "1bc2832c24239b0141d5674bb9174f9d68a8b5b3f2753311927c172ca46f7e9c" +dependencies = [ + "funty", + "radium", + "tap", + "wyz", +] + +[[package]] +name = "bumpalo" +version = "3.19.1" +source = 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+[[package]] +name = "rkyv_derive" +version = "0.7.46" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "84d7b42d4b8d06048d3ac8db0eb31bcb942cbeb709f0b5f2b2ebde398d3038f5" +dependencies = [ + "proc-macro2", + "quote", + "syn 1.0.109", +] + +[[package]] +name = "rustc-hash" +version = "2.1.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "357703d41365b4b27c590e3ed91eabb1b663f07c4c084095e60cbed4362dff0d" + +[[package]] +name = "rustversion" +version = "1.0.22" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "b39cdef0fa800fc44525c84ccb54a029961a8215f9619753635a9c0d2538d46d" + [[package]] name = "same-file" version = "1.0.6" @@ -271,6 +867,18 @@ dependencies = [ "winapi-util", ] +[[package]] +name = "scopeguard" +version = "1.2.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49" + +[[package]] +name = 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"registry+https://github.com/rust-lang/crates.io-index" +checksum = "bfa5fdc3bce6191a1dbc8c02d5c8bffcf557bafa17c124c5264a458f1b0613fa" +dependencies = [ + "tinyvec_macros", +] + +[[package]] +name = "tinyvec_macros" +version = "0.1.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20" + [[package]] name = "toml" version = "0.5.11" @@ -460,18 +1136,40 @@ version = "1.0.22" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "9312f7c4f6ff9069b165498234ce8be658059c6728633667c526e27dc2cf1df5" +[[package]] +name = "unicode-segmentation" +version = "1.12.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "f6ccf251212114b54433ec949fd6a7841275f9ada20dddd2f29e9ceea4501493" + [[package]] name = "unicode-width" version = "0.2.2" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = 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"registry+https://github.com/rust-lang/crates.io-index" +checksum = "5256bae2d58f54820e6490f9839c49780dff84c65aeab9e772f15d5f0e913a55" +dependencies = [ + "bumpalo", + "proc-macro2", + "quote", + "syn 2.0.114", + "wasm-bindgen-shared", +] + +[[package]] +name = "wasm-bindgen-shared" +version = "0.2.108" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "1f01b580c9ac74c8d8f0c0e4afb04eeef2acf145458e52c03845ee9cd23e3d12" +dependencies = [ + "unicode-ident", +] + [[package]] name = "winapi-util" version = "0.1.11" @@ -506,6 +1264,21 @@ dependencies = [ "windows-link", ] +[[package]] +name = "wit-bindgen" +version = "0.51.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "d7249219f66ced02969388cf2bb044a09756a083d0fab1e566056b04d9fbcaa5" + +[[package]] +name = "wyz" +version = "0.5.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "05f360fc0b24296329c78fda852a1e9ae82de9cf7b27dae4b7f62f118f77b9ed" +dependencies = [ + "tap", +] + [[package]] name = "yaml-rust2" version = "0.8.1" @@ -534,7 +1307,7 @@ checksum = "2c7962b26b0a8685668b671ee4b54d007a67d4eaf05fda79ac0ecf41e32270f1" dependencies = [ "proc-macro2", "quote", - "syn", + "syn 2.0.114", ] [[package]] diff --git a/Cargo.toml b/Cargo.toml index 065f000..1aefb28 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -17,3 +17,6 @@ tree-sitter-bash = "0.23" tree-sitter-highlight = "0.24" tree-sitter-json = "0.24" tree-sitter-rust = "0.23" + +# CSS processing +lightningcss = "1.0.0-alpha.70" diff --git a/src/css.rs b/src/css.rs new file mode 100644 index 0000000..48c1bbd --- /dev/null +++ b/src/css.rs @@ -0,0 +1,80 @@ +//! CSS processing via lightningcss. + +use lightningcss::stylesheet::{MinifyOptions, ParserOptions, PrinterOptions, StyleSheet}; + +/// Minify CSS content. +/// +/// Returns minified CSS string on success, or the original input on error. +pub fn minify_css(css: &str) -> String { + match try_minify(css) { + Ok(minified) => minified, + Err(_) => css.to_string(), + } +} + +fn try_minify(css: &str) -> Result> { + let mut stylesheet = StyleSheet::parse(css, ParserOptions::default()) + .map_err(|e| format!("parse error: {:?}", e))?; + + stylesheet + .minify(MinifyOptions::default()) + .map_err(|e| format!("minify error: {:?}", e))?; + + let result = stylesheet + .to_css(PrinterOptions { + minify: true, + ..Default::default() + }) + .map_err(|e| format!("print error: {:?}", e))?; + + Ok(result.code) +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn test_minify_removes_whitespace() { + let input = r#" + .foo { + color: red; + } + "#; + let output = minify_css(input); + + // Should be smaller (whitespace removed) + assert!(output.len() < input.len()); + // Should still contain the essential content + assert!(output.contains(".foo")); + assert!(output.contains("color")); + assert!(output.contains("red")); + } + + #[test] + fn test_minify_removes_comments() { + let input = r#" + /* This is a comment */ + .bar { background: blue; } + "#; + let output = minify_css(input); + + // Comment should be removed + assert!(!output.contains("This is a comment")); + // Rule should remain + assert!(output.contains(".bar")); + } + + #[test] + fn test_minify_merges_selectors() { + let input = r#" + .foo { color: red; } + .bar { color: red; } + "#; + let output = minify_css(input); + + // Should merge identical rules + // Either ".foo,.bar" or ".bar,.foo" pattern + assert!(output.contains(",")); + } +} diff --git a/src/main.rs b/src/main.rs index 5df0c19..e0f573c 100644 --- a/src/main.rs +++ b/src/main.rs @@ -3,6 +3,7 @@ //! Transforms markdown content into a minimal static site. mod content; +mod css; mod error; mod highlight; mod render; @@ -214,8 +215,11 @@ fn write_output( Ok(()) } -/// Copy static assets (CSS, etc.) to output directory +/// Copy static assets (CSS, images, etc.) to output directory. +/// CSS files are minified before writing. fn copy_static_assets(static_dir: &Path, output_dir: &Path) -> Result<()> { + use crate::css::minify_css; + if !static_dir.exists() { return Ok(()); // No static dir is fine } @@ -241,12 +245,31 @@ fn copy_static_assets(static_dir: &Path, output_dir: &Path) -> Result<()> { })?; } - fs::copy(src, &dest).map_err(|e| Error::WriteFile { - path: dest.clone(), - source: e, - })?; - - eprintln!("copying: {} → {}", src.display(), dest.display()); + // Minify CSS files, copy others directly + if src.extension().is_some_and(|ext| ext == "css") { + let css = fs::read_to_string(src).map_err(|e| Error::ReadFile { + path: src.to_path_buf(), + source: e, + })?; + let minified = minify_css(&css); + fs::write(&dest, &minified).map_err(|e| Error::WriteFile { + path: dest.clone(), + source: e, + })?; + eprintln!( + "minifying: {} → {} ({} → {} bytes)", + src.display(), + dest.display(), + css.len(), + minified.len() + ); + } else { + fs::copy(src, &dest).map_err(|e| Error::WriteFile { + path: dest.clone(), + source: e, + })?; + eprintln!("copying: {} → {}", src.display(), dest.display()); + } } Ok(())