Respect git global ignore files (core.excludesFile) in source scanner

crates/ignore/src/gitignore.rs

@@ -702,14 +702,14 @@ fn parse_excludes_file(data: &[u8]) -> Option<PathBuf> {
         Regex::builder()
             .configure(Regex::config().utf8_empty(false))
             .syntax(syntax::Config::new().utf8(false))
-            .build(r#"(?im-u)^\s*excludesfile\s*=\s*"?\s*(\S+?)\s*"?\s*$"#)
+            .build(r#"(?im-u)^\s*excludesfile\s*=\s*(?:"(\S(?:[^"\r\n]*\S)?)"|(\S+))\s*$"#)
             .unwrap()
     });
     // We don't care about amortizing allocs here I think. This should only
     // be called ~once per traversal or so? (Although it's not guaranteed...)
     let mut caps = re.create_captures();
     re.captures(data, &mut caps);
-    let span = caps.get_group(1)?;
+    let span = caps.get_group(1).or_else(|| caps.get_group(2))?;
     let candidate = &data[span];
     std::str::from_utf8(candidate).ok().map(|s| PathBuf::from(expand_tilde(s)))
 }
@@ -879,6 +879,13 @@ mod tests {
         );
     }
 
+    #[test]
+    fn parse_excludes_file_with_spaces() {
+        let data = bytes("[core]\nexcludesFile = \"~/foo bar/ignore\"");
+        let got = super::parse_excludes_file(&data).unwrap();
+        assert_eq!(path_string(got), super::expand_tilde("~/foo bar/ignore"));
+    }
+
     #[test]
     fn parse_excludes_file5() {
         let data = bytes("[core]\nexcludesFile = \" \"~/foo/bar \" \"");

crates/oxide/src/scanner/mod.rs

@@ -781,8 +781,8 @@ fn create_walker(sources: &Sources) -> Option<WalkBuilder> {
     // Scan hidden files / directories
     builder.hidden(false);
 
-    // Don't respect global gitignore files
-    builder.git_global(false);
+    // Respect global gitignore files configured in git (e.g. `core.excludesFile`)
+    builder.git_global(true);
 
     // By default, allow .gitignore files to be used regardless of whether or not
     // a .git directory is present. This is an optimization for when projects
@@ -822,6 +822,7 @@ fn create_walker(sources: &Sources) -> Option<WalkBuilder> {
     for parent in first_root?.ancestors() {
         if parent.join(".git").exists() {
             builder.require_git(true);
+            builder.current_dir(parent);
             break;
         }
     }

crates/oxide/tests/scanner.rs

@@ -6,7 +6,7 @@ mod scanner {
     use std::process::Command;
     use std::thread::sleep;
     use std::time::Duration;
-    use std::{fs, path};
+    use std::{env, fs, path};
 
     use tailwindcss_oxide::*;
     use tempfile::tempdir;
@@ -2923,6 +2923,65 @@ mod scanner {
         );
     }
 
+    #[test]
+    fn respects_git_core_excludes_file() {
+        if env::var_os("TAILWIND_OXIDE_CORE_EXCLUDES_CHILD").is_none() {
+            let status = Command::new(env::current_exe().unwrap())
+                .args(["--exact", "scanner::respects_git_core_excludes_file"])
+                .env("TAILWIND_OXIDE_CORE_EXCLUDES_CHILD", "1")
+                .status()
+                .unwrap();
+            assert!(status.success());
+            return;
+        }
+
+        let dir = tempdir().unwrap().into_path();
+
+        let global_ignore = dir.join("global ignore");
+        fs::write(&global_ignore, "ignored-by-global.html\nsrc/ignored-relative.html\n").unwrap();
+
+        let global_gitconfig = dir.join(".gitconfig");
+        fs::write(
+            &global_gitconfig,
+            format!(
+                "[core]\n    excludesFile = \"{}\"\n",
+                global_ignore.display()
+            ),
+        )
+        .unwrap();
+
+        let repo_dir = dir.join("repo");
+        fs::create_dir_all(&repo_dir).unwrap();
+        _ = Command::new("git").arg("init").current_dir(&repo_dir).output();
+
+        create_files_in(
+            &repo_dir,
+            &[
+                ("src/index.html", "content-['index.html']"),
+                (
+                    "src/ignored-by-global.html",
+                    "content-['ignored-by-global.html']",
+                ),
+                (
+                    "src/ignored-relative.html",
+                    "content-['ignored-relative.html']",
+                ),
+            ],
+        );
+
+        let sources = vec![public_source_entry_from_pattern(
+            repo_dir.clone(),
+            "@source '**/*'",
+        )];
+
+        env::set_var("GIT_CONFIG_GLOBAL", &global_gitconfig);
+
+        let mut scanner = Scanner::new(sources);
+        let candidates = scanner.scan();
+
+        assert_eq!(candidates, vec!["content-['index.html']"]);
+    }
+
     #[test]
     fn test_explicitly_ignore_explicitly_allowed_files() {
         // Create a temporary working directory