src/yaeblog-typst/Cargo.lock

@@ -17,6 +17,15 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "android_system_properties"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "819e7219dbd41043ac279b19830f2efc897156490d7fd6ea916720117ee66311"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "anyhow"
 version = "1.0.104"
@@ -190,6 +199,17 @@ version = "1.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0d1275808335c5583ea45a4141d631dafcb36b79fa8a5e10b00e356b6af3e08a"
 
+[[package]]
+name = "chrono"
+version = "0.4.45"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1aa79e62e7697b8e29b513a68abacf485adcd1fe8284a4316c5ae868e6633327"
+dependencies = [
+ "iana-time-zone",
+ "num-traits",
+ "windows-link",
+]
+
 [[package]]
 name = "ciborium"
 version = "0.2.2"
@@ -285,6 +305,12 @@ dependencies = [
  "syn 2.0.119",
 ]
 
+[[package]]
+name = "core-foundation-sys"
+version = "0.8.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "773648b94d0e5d620f64f280777445740e61fe701025087ec8b57f45c791888b"
+
 [[package]]
 name = "core_maths"
 version = "0.1.1"
@@ -367,6 +393,27 @@ version = "0.5.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7cd812cc2bc1d69d4764bd80df88b4317eaef9e773c75226407d9bc0876b211c"
 
+[[package]]
+name = "dirs"
+version = "6.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3e8aa94d75141228480295a7d0e7feb620b1a5ad9f12bc40be62411e38cce4e"
+dependencies = [
+ "dirs-sys",
+]
+
+[[package]]
+name = "dirs-sys"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e01a3366d27ee9890022452ee61b2b63a67e6f13f58900b651ff5665f0bb1fab"
+dependencies = [
+ "libc",
+ "option-ext",
+ "redox_users",
+ "windows-sys",
+]
+
 [[package]]
 name = "displaydoc"
 version = "0.2.6"
@@ -419,6 +466,16 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "877a4ace8713b0bcf2a4e7eec82529c029f1d0619886d18145fea96c3ffe5c0f"
 
+[[package]]
+name = "errno"
+version = "0.3.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "39cab71617ae0d63f51a36d69f866391735b51691dbda63cf6f96d042b63efeb"
+dependencies = [
+ "libc",
+ "windows-sys",
+]
+
 [[package]]
 name = "euclid"
 version = "0.22.14"
@@ -466,6 +523,16 @@ version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b97b65636e5b9ef369943878ac74335ba1c55c1cb6adbf1e2c293c624248d693"
 
+[[package]]
+name = "filetime"
+version = "0.2.29"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c287a33c7f0a620c38e641e7f60827713987b3c0f26e8ddc9462cc69cf75759"
+dependencies = [
+ "cfg-if",
+ "libc",
+]
+
 [[package]]
 name = "find-msvc-tools"
 version = "0.1.9"
@@ -531,6 +598,41 @@ dependencies = [
  "percent-encoding",
 ]
 
+[[package]]
+name = "futures-core"
+version = "0.3.33"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2cd50c473c80f6d7c3670a752354b8e569b1a7cbfdc0419ec88e5edad85e0dc7"
+
+[[package]]
+name = "futures-task"
+version = "0.3.33"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b231ed28831efb4a61a08580c4bc233ec56bc009f4cd8f52da2c3cb97df0c109"
+
+[[package]]
+name = "futures-util"
+version = "0.3.33"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a77a90a256fce34da66415271e30f94ee91c57b04b8a2c042d9cf3220179deaa"
+dependencies = [
+ "futures-core",
+ "futures-task",
+ "pin-project-lite",
+ "slab",
+]
+
+[[package]]
+name = "getrandom"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ff2abc00be7fca6ebc474524697ae276ad847ad0a6b3faa4bcb027e9a4614ad0"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
 [[package]]
 name = "gif"
 version = "0.14.2"
@@ -731,6 +833,30 @@ version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bef68590049bab63a464eee1a1158ac04c6f6613a546d8d90f78636b8b94f171"
 
+[[package]]
+name = "iana-time-zone"
+version = "0.1.65"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e31bc9ad994ba00e440a8aa5c9ef0ec67d5cb5e5cb0cc7f8b744a35b389cc470"
+dependencies = [
+ "android_system_properties",
+ "core-foundation-sys",
+ "iana-time-zone-haiku",
+ "js-sys",
+ "log",
+ "wasm-bindgen",
+ "windows-core",
+]
+
+[[package]]
+name = "iana-time-zone-haiku"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f31827a206f56af32e590ba56d5d2d085f558508192593743f16b2306495269f"
+dependencies = [
+ "cc",
+]
+
 [[package]]
 name = "icu_collator"
 version = "2.2.1"
@@ -979,6 +1105,17 @@ version = "1.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8f42a60cbdf9a97f5d2305f08a87dc4e09308d1276d28c869c684d7777685682"
 
+[[package]]
+name = "js-sys"
+version = "0.3.103"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "53b44bfcdb3f8d5837a46dae1ca9660a837176eee74a28b229bc626816589102"
+dependencies = [
+ "cfg-if",
+ "futures-util",
+ "wasm-bindgen",
+]
+
 [[package]]
 name = "kamadak-exif"
 version = "0.6.1"
@@ -1012,6 +1149,15 @@ version = "0.2.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b6d2cec3eae94f9f509c767b45932f1ada8350c4bdb85af2fcab4a3c14807981"
 
+[[package]]
+name = "libredox"
+version = "0.1.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c943259e342f1e06ff2da7a83eabdfe7f92ce10262688dbf1895ff0b3e6e4652"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "linebender_resource_handle"
 version = "0.1.1"
@@ -1024,6 +1170,12 @@ version = "0.5.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0717cef1bc8b636c6e1c1bbdefc09e6322da8a9321966e8928ef80d20f7f770f"
 
+[[package]]
+name = "linux-raw-sys"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32a66949e030da00e8c7d4434b251670a91556f4144941d37452769c25d58a53"
+
 [[package]]
 name = "lipsum"
 version = "0.9.1"
@@ -1139,6 +1291,12 @@ version = "1.21.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9f7c3e4beb33f85d45ae3e3a1792185706c8e16d043238c593331cc7cd313b50"
 
+[[package]]
+name = "option-ext"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "04744f49eae99ab78e0d5c0b603ab218f515ea8cfe5a456d7629ad883a3b6e7d"
+
 [[package]]
 name = "palette"
 version = "0.7.6"
@@ -1270,6 +1428,12 @@ version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5be167a7af36ee22fe3115051bc51f6e6c7054c9348e28deb4f49bd6f705a315"
 
+[[package]]
+name = "pin-project-lite"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a89322df9ebe1c1578d689c92318e070967d1042b512afbe49518723f4e6d5cd"
+
 [[package]]
 name = "plist"
 version = "1.10.0"
@@ -1476,6 +1640,17 @@ dependencies = [
  "bitflags",
 ]
 
+[[package]]
+name = "redox_users"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4e608c6638b9c18977b00b475ac1f28d14e84b27d8d42f70e0bf1e3dec127ac"
+dependencies = [
+ "getrandom",
+ "libredox",
+ "thiserror",
+]
+
 [[package]]
 name = "regex"
 version = "1.13.1"
@@ -1536,6 +1711,25 @@ version = "2.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6b1e7f9a428571be2dc5bc0505c13fb6bf936822b894ec87abf8a08a4e51742d"
 
+[[package]]
+name = "rustix"
+version = "1.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b6fe4565b9518b83ef4f91bb47ce29620ca828bd32cb7e408f0062e9930ba190"
+dependencies = [
+ "bitflags",
+ "errno",
+ "libc",
+ "linux-raw-sys",
+ "windows-sys",
+]
+
+[[package]]
+name = "rustversion"
+version = "1.0.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cf54715a573b99ac80df0bc206da022bcd442c974952c7b9720069370852e21f"
+
 [[package]]
 name = "rustybuzz"
 version = "0.20.1"
@@ -1834,6 +2028,17 @@ dependencies = [
  "yaml-rust",
 ]
 
+[[package]]
+name = "tar"
+version = "0.4.46"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f6221d9a6003c78398e3b239969f352578258df48c8eb051caadae0015bc840"
+dependencies = [
+ "filetime",
+ "libc",
+ "xattr",
+]
+
 [[package]]
 name = "thin-vec"
 version = "0.2.18"
@@ -2073,12 +2278,18 @@ version = "0.15.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "27ee52e27dfab0da5ac3d19e7e43a21fbc7ff83af9301119468bae89fa857a8b"
 dependencies = [
+ "chrono",
+ "dirs",
  "ecow",
+ "fastrand",
+ "flate2",
  "once_cell",
  "parking_lot",
  "rustc-hash",
  "serde",
  "serde_json",
+ "tar",
+ "typst-assets",
  "typst-library",
  "typst-syntax",
  "typst-timing",
@@ -2530,6 +2741,57 @@ dependencies = [
  "winapi-util",
 ]
 
+[[package]]
+name = "wasi"
+version = "0.11.1+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ccf3ec651a847eb01de73ccad15eb7d99f80485de043efb2f370cd654f4ea44b"
+
+[[package]]
+name = "wasm-bindgen"
+version = "0.2.126"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4b067c0c11094aef6b7a801c1e34a26affafdf3d051dba08456b868789aaf9a4"
+dependencies = [
+ "cfg-if",
+ "once_cell",
+ "rustversion",
+ "wasm-bindgen-macro",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-macro"
+version = "0.2.126"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "167ce5e579f6bcf889c4f7175a8a5a585de84e8ff93976ce393efa5f2837aab1"
+dependencies = [
+ "quote",
+ "wasm-bindgen-macro-support",
+]
+
+[[package]]
+name = "wasm-bindgen-macro-support"
+version = "0.2.126"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3997c7839262f4ef12cf90b818d6340c18e80f263f1a94bf157d0ec4420380e"
+dependencies = [
+ "bumpalo",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.119",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-shared"
+version = "0.2.126"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc1b4cb0cc549fcf58d7dfc081778139b3d283a081644e833e84682ad71cea24"
+dependencies = [
+ "unicode-ident",
+]
+
 [[package]]
 name = "wasmi"
 version = "1.1.0"
@@ -2591,12 +2853,65 @@ dependencies = [
  "windows-sys",
 ]
 
+[[package]]
+name = "windows-core"
+version = "0.62.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8e83a14d34d0623b51dce9581199302a221863196a1dde71a7663a4c2be9deb"
+dependencies = [
+ "windows-implement",
+ "windows-interface",
+ "windows-link",
+ "windows-result",
+ "windows-strings",
+]
+
+[[package]]
+name = "windows-implement"
+version = "0.60.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "053e2e040ab57b9dc951b72c264860db7eb3b0200ba345b4e4c3b14f67855ddf"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.119",
+]
+
+[[package]]
+name = "windows-interface"
+version = "0.59.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f316c4a2570ba26bbec722032c4099d8c8bc095efccdc15688708623367e358"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.119",
+]
+
 [[package]]
 name = "windows-link"
 version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f0805222e57f7521d6a62e36fa9163bc891acd422f971defe97d64e70d0a4fe5"
 
+[[package]]
+name = "windows-result"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7781fa89eaf60850ac3d2da7af8e5242a5ea78d1a11c49bf2910bb5a73853eb5"
+dependencies = [
+ "windows-link",
+]
+
+[[package]]
+name = "windows-strings"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7837d08f69c77cf6b07689544538e017c1bfcf57e34b4c0ff58e6c2cd3b37091"
+dependencies = [
+ "windows-link",
+]
+
 [[package]]
 name = "windows-sys"
 version = "0.61.2"
@@ -2627,6 +2942,16 @@ version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1ffae5123b2d3fc086436f8834ae3ab053a283cfac8fe0a0b8eaae044768a4c4"
 
+[[package]]
+name = "xattr"
+version = "1.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32e45ad4206f6d2479085147f02bc2ef834ac85886624a23575ae137c8aa8156"
+dependencies = [
+ "libc",
+ "rustix",
+]
+
 [[package]]
 name = "xmlwriter"
 version = "0.1.0"
@@ -2640,6 +2965,7 @@ dependencies = [
  "anyhow",
  "libc",
  "typst",
+ "typst-html",
  "typst-kit",
 ]
 

src/yaeblog-typst/Cargo.toml

@@ -10,4 +10,5 @@ crate-type = ["cdylib"]
 anyhow = "1.0.104"
 libc = "0.2.187"
 typst = "0.15.1"
-typst-kit = "0.15.1"
+typst-html = "0.15.1"
+typst-kit = { version = "0.15.1", features = ["datetime", "system-packages", "embedded-fonts"]}

src/yaeblog-typst/src/lib.rs

@@ -1,17 +1,122 @@
 mod ffi_utils;
 mod world;
 
+use crate::ffi_utils::{ExternResult, extract_str, from_handler, into_handler, return_str};
+use crate::world::SystemWorld;
+use anyhow::anyhow;
 use std::ffi::{c_char, c_void};
-use crate::ffi_utils::ExternResult;
+use std::path::PathBuf;
+use std::str::FromStr;
+use typst::diag::{EcoVec, SourceDiagnostic, Warned};
+use typst_html::{HtmlDocument, HtmlOptions};
 
-pub struct TypstCompiler {
+struct TypstCompiler {
+    world: SystemWorld,
+}
 
+impl TypstCompiler {
+    fn new(work_dir: &str) -> anyhow::Result<Self> {
+        let path = PathBuf::from_str(work_dir)?;
+
+        Ok(Self {
+            world: SystemWorld::new(path),
+        })
+    }
+
+    fn compile(&mut self, input: &str) -> anyhow::Result<String> {
+        self.world.set_current_file(input);
+
+        let Warned { output, warnings } = typst::compile::<HtmlDocument>(&mut self.world);
+        let document = match output {
+            Ok(d) => Ok(d),
+            Err(e) => Err(anyhow!(typst_to_err(e))),
+        }?;
+
+        let content = export_html(&document)?;
+        Ok(content)
+    }
+}
+
+fn typst_to_err(e: EcoVec<SourceDiagnostic>) -> String {
+    let mut message = String::new();
+    message.push_str("Failed to compile: \n");
+
+    for err in e {
+        message.push_str(format!("  - {} \n", err.message.as_str()).as_str());
+    }
+
+    message
+}
+
+fn export_html(document: &HtmlDocument) -> anyhow::Result<String> {
+    let options = HtmlOptions { pretty: false };
+
+    match typst_html::html(document, &options) {
+        Ok(o) => Ok(o),
+        Err(e) => Err(anyhow!(typst_to_err(e))),
+    }
+}
+
+fn create_compiler(work_dir: *const c_char) -> anyhow::Result<Box<TypstCompiler>> {
+    let work_dir = extract_str(work_dir)?;
+    let compiler = TypstCompiler::new(work_dir)?;
+
+    Ok(Box::new(compiler))
 }
 
 pub extern "C" fn init_compiler(work_dir: *const c_char) -> ExternResult<*mut c_void> {
-    todo!()
+    let compiler = create_compiler(work_dir);
+    let handler = compiler.map(into_handler);
+
+    ExternResult::from_result(handler)
 }
 
-pub extern "C" fn typst_compile(handler: *mut c_void, str: *const c_char) -> ExternResult<*mut c_char> {
+fn typst_compile_inner(
-    todo!()
+    compiler: &mut TypstCompiler,
+    str: *const c_char,
+) -> anyhow::Result<*mut c_char> {
+    let input = extract_str(str)?;
+    compiler.compile(input).map(return_str)
+}
+
+pub extern "C" fn typst_compile(
+    handler: *mut c_void,
+    str: *const c_char,
+) -> ExternResult<*mut c_char> {
+    let compiler = from_handler::<TypstCompiler>(handler);
+
+    ExternResult::from_result(typst_compile_inner(compiler, str))
+}
+
+pub extern "C" fn free_compiler(handler: *mut c_void) {
+    if handler.is_null() {
+        return;
+    }
+
+    unsafe {
+        // Drop it!
+        let _ = Box::from_raw(handler as *mut TypstCompiler);
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn smoke_test() {
+        let mut compiler = TypstCompiler::new(".").unwrap();
+        let result = compiler.compile("= 123").unwrap();
+
+        assert!(result.contains("<h2>123</h2>"))
+    }
+
+    #[test]
+    fn math_test() {
+        let mut compiler = TypstCompiler::new(".").unwrap();
+        let result = compiler.compile(
+            "$1 + 1 = 2$").unwrap();
+
+        assert!(result.contains("math"));
+    }
 }

src/yaeblog-typst/src/world.rs

@@ -1,43 +1,127 @@
 use std::path::PathBuf;
 use std::sync::LazyLock;
-use typst::utils::LazyHash;
+use typst::diag::{FileError, FileResult, PackageError};
-use typst::{Library, World};
-use typst::diag::FileResult;
 use typst::foundations::{Bytes, Datetime, Duration};
-use typst::syntax::{FileId, Source};
+use typst::syntax::{FileId, RootedPath, Source, VirtualPath, VirtualRoot};
 use typst::text::{Font, FontBook};
+use typst::utils::LazyHash;
+use typst::{Feature, Features, Library, LibraryExt, World};
+use typst_kit::datetime::Time;
+use typst_kit::files::{FileLoader, FileStore, FsRoot};
+use typst_kit::fonts::{FontStore, embedded};
 
 pub struct SystemWorld {
     work_dir: PathBuf,
     library: LazyHash<Library>,
+    files: FileStore<SystemFiles>,
+    fonts: LazyLock<FontStore, Box<dyn Fn() -> FontStore + Send + Sync>>,
+    now: Time,
+}
+
+const DEFAULT_FEATURES: [Feature; 1] = [Feature::Html];
+
+impl SystemWorld {
+    pub fn new(work_dir: PathBuf) -> Self {
+        let features = DEFAULT_FEATURES.iter().copied().map(Into::into).collect();
+        let library = Library::builder().with_features(features).build();
+
+        Self {
+            work_dir: work_dir.clone(),
+            library: LazyHash::new(library),
+            files: FileStore::new(SystemFiles::new(work_dir)),
+            fonts: LazyLock::new(Box::new(|| {
+                let mut fonts = FontStore::new();
+
+                fonts.extend(embedded());
+
+                fonts
+            })),
+            now: Time::system(),
+        }
+    }
+
+    pub fn set_current_file(&mut self, content: &str) {
+        let current_file = &mut self.files.loader_mut().current_file;
+        let bytes = content.as_bytes();
+
+        current_file.clear();
+        current_file.resize(bytes.len(), 0);
+        current_file.copy_from_slice(content.as_bytes())
+    }
 }
 
 impl World for SystemWorld {
     fn library(&self) -> &LazyHash<Library> {
-        todo!()
+        &self.library
     }
 
     fn book(&self) -> &LazyHash<FontBook> {
-        todo!()
+        self.fonts.book()
     }
 
     fn main(&self) -> FileId {
-        todo!()
+        *MAIN_ID
     }
 
     fn source(&self, id: FileId) -> FileResult<Source> {
-        todo!()
+        self.files.source(id)
     }
 
     fn file(&self, id: FileId) -> FileResult<Bytes> {
-        todo!()
+        self.files.file(id)
     }
 
     fn font(&self, index: usize) -> Option<Font> {
-        todo!()
+        self.fonts.font(index)
     }
 
     fn today(&self, offset: Option<Duration>) -> Option<Datetime> {
-        todo!()
+        self.now.today(offset)
+    }
+}
+
+/// Provides project files from a configured directory and package files from
+/// standard locations.
+struct SystemFiles {
+    pub main: FileId,
+    project: FsRoot,
+    current_file: Vec<u8>,
+}
+
+static MAIN_ID: LazyLock<FileId> = LazyLock::new(|| {
+    FileId::unique(RootedPath::new(
+        VirtualRoot::Project,
+        VirtualPath::new("<main>").unwrap(),
+    ))
+});
+
+impl SystemFiles {
+    pub fn new(work_dir: PathBuf) -> Self {
+        Self {
+            main: *MAIN_ID,
+            project: FsRoot::new(work_dir),
+            current_file: Vec::new(),
+        }
+    }
+
+    pub fn resolve(&self, id: FileId) -> FileResult<PathBuf> {
+        Ok(self.root(id)?.resolve(id.vpath())?)
+    }
+
+    fn root(&self, id: FileId) -> FileResult<FsRoot> {
+        Ok(match id.root() {
+            VirtualRoot::Project => Ok(self.project.clone()),
+            VirtualRoot::Package(_) => Err(FileError::Package(PackageError::Other(None))),
+        }?)
+    }
+}
+
+impl FileLoader for SystemFiles {
+    fn load(&self, id: FileId) -> FileResult<Bytes> {
+        if id == *MAIN_ID {
+            Ok(Bytes::new(self.current_file.clone()))
+        } else {
+            self.root(id)?.load(id.vpath())
+        }
     }
 }