feat: Support cwd as root directory

src/lib.rs

@@ -1,4 +1,4 @@
-use std::path::Path;
+use std::path::{Path, PathBuf};
 
 use globset::{Glob, GlobMatcher};
 
@@ -8,6 +8,9 @@ pub struct EditorConfig {
     root: bool,
 
     sections: Vec<EditorConfigSection>,
+
+    /// The base directory for resolving absolute paths.
+    cwd: Option<PathBuf>,
 }
 
 impl EditorConfig {
@@ -18,6 +21,16 @@ impl EditorConfig {
     pub fn sections(&self) -> &[EditorConfigSection] {
         &self.sections
     }
+
+    pub fn cwd(&self) -> Option<&Path> {
+        self.cwd.as_deref()
+    }
+
+    /// Sets the current working directory for resolving absolute paths.
+    pub fn with_cwd<P: AsRef<Path>>(mut self, cwd: P) -> Self {
+        self.cwd = Some(cwd.as_ref().to_path_buf());
+        self
+    }
 }
 
 /// <https://spec.editorconfig.org/index.html>
@@ -190,11 +203,14 @@ impl EditorConfig {
             }
         }
 
-        Self { root, sections }
+        Self { root, sections, cwd: None }
     }
 
     /// Resolve a given path and return the resolved properties.
+    /// If `cwd` is set, absolute paths will be resolved relative to `cwd`.
     pub fn resolve(&self, path: &Path) -> EditorConfigProperties {
+        let path =
+            if let Some(cwd) = &self.cwd { path.strip_prefix(cwd).unwrap_or(path) } else { path };
         let mut properties = EditorConfigProperties::default();
         for section in &self.sections {
             if section.matcher.as_ref().is_some_and(|matcher| matcher.is_match(path)) {

tests/main.rs

@@ -1,4 +1,4 @@
-use std::path::Path;
+use std::path::{Path, PathBuf};
 
 use editorconfig_parser::{
     Charset, EditorConfig, EditorConfigProperties, EditorConfigProperty::Value, EndOfLine,
@@ -180,3 +180,52 @@ fn unset() {
     let properties = editor_config.resolve(&path);
     assert_eq!(properties, EditorConfigProperties::default());
 }
+
+#[test]
+fn resolve_with_cwd() {
+    let editor_config = EditorConfig::parse(
+        "
+        [*]
+        indent_size = 2
+
+        [*.ts]
+        indent_size = 4
+
+        [src/**/*.ts]
+        indent_size = 8
+    ",
+    )
+    .with_cwd("/project");
+
+    assert_eq!(editor_config.cwd(), Some(Path::new("/project")));
+
+    // Absolute path should be resolved relative to cwd
+    let properties = editor_config.resolve(Path::new("/project/file.ts"));
+    assert_eq!(properties.indent_size, Value(4));
+
+    let properties = editor_config.resolve(Path::new("/project/src/file.ts"));
+    assert_eq!(properties.indent_size, Value(8));
+
+    // Path not under cwd should still work (uses path as-is)
+    let properties = editor_config.resolve(Path::new("/other/file.ts"));
+    assert_eq!(properties.indent_size, Value(4));
+
+    // Relative path should work as before
+    let properties = editor_config.resolve(Path::new("file.ts"));
+    assert_eq!(properties.indent_size, Value(4));
+}
+
+#[test]
+fn resolve_with_cwd_pathbuf() {
+    let cwd = PathBuf::from("/my/project");
+    let editor_config = EditorConfig::parse(
+        "
+        [*.rs]
+        indent_size = 4
+    ",
+    )
+    .with_cwd(&cwd);
+
+    let properties = editor_config.resolve(&cwd.join("main.rs"));
+    assert_eq!(properties.indent_size, Value(4));
+}