feat: add Git and Jujutsu gutter indicators

src/repository.rs

@@ -229,7 +229,7 @@ fn git_command(store: &Path) -> Command {
     .env("GIT_TERMINAL_PROMPT", "0");
     cmd
 }
-fn jj_command(root: &Path) -> Command {
+pub(crate) fn jj_command(root: &Path) -> Command {
     let mut cmd = Command::new("jj");
     cmd.arg("--repository")
         .arg(root)
@@ -255,7 +255,7 @@ fn path_bytes(bytes: &[u8]) -> Result<PathBuf, String> {
         ))
     }
 }
-fn safe_path(path: &Path) -> Result<(), String> {
+pub(crate) fn safe_path(path: &Path) -> Result<(), String> {
     if path.as_os_str().is_empty()
         || path
             .components()
@@ -274,7 +274,7 @@ fn safe_path(path: &Path) -> Result<(), String> {
     }
     Ok(())
 }
-fn store_for_jj(root: &Path) -> Result<PathBuf, String> {
+pub(crate) fn store_for_jj(root: &Path) -> Result<PathBuf, String> {
     let mut repo = root.join(".jj/repo");
     if repo.is_file() {
         let pointer = fs::read(&repo).map_err(|e| e.to_string())?;
@@ -289,6 +289,23 @@ fn store_for_jj(root: &Path) -> Result<PathBuf, String> {
         .map_err(|e| e.to_string())
 }
 
+pub(crate) fn jj_file_pattern(path: &str) -> String {
+    let mut pattern = String::from("root-file:\"");
+    for ch in path.chars() {
+        match ch {
+            '\\' => pattern.push_str("\\\\"),
+            '"' => pattern.push_str("\\\""),
+            '\0'..='\u{1f}' | '\u{7f}' => {
+                use std::fmt::Write as _;
+                write!(&mut pattern, "\\x{:02x}", ch as u32).unwrap();
+            }
+            _ => pattern.push(ch),
+        }
+    }
+    pattern.push('"');
+    pattern
+}
+
 struct Remote {
     name: String,
     url: String,
@@ -872,19 +889,7 @@ impl Repository {
             };
             let bytes = if matches!(kind.as_str(), "file" | "symlink" | "conflict") {
                 // Use an exact fileset and jj's own conflict materialization.
-                let mut pattern = String::from("root-file:\"");
-                for ch in path.chars() {
-                    match ch {
-                        '\\' => pattern.push_str("\\\\"),
-                        '"' => pattern.push_str("\\\""),
-                        '\0'..='\u{1f}' | '\u{7f}' => {
-                            use std::fmt::Write as _;
-                            write!(&mut pattern, "\\x{:02x}", ch as u32).unwrap();
-                        }
-                        _ => pattern.push(ch),
-                    }
-                }
-                pattern.push('"');
+                let pattern = jj_file_pattern(&path);
                 self.jj(
                     root,
                     &["file", "show", "-r", &revset, "-T", "", "--", &pattern],