Use /root for root user in SSH srcBaseDir

When parsing SSH runtime strings with user 'root', use /root as the home
directory instead of /home/root.

Author: ammar-agent

src/utils/chatCommands.test.ts

@@ -49,21 +49,32 @@ describe("parseRuntimeString", () => {
     const result = parseRuntimeString("ssh hostname", workspaceName);
     // When no user is specified, uses current user (process.env.USER)
     const expectedUser = process.env.USER ?? "user";
+    const expectedHomeDir = expectedUser === "root" ? "/root" : `/home/${expectedUser}`;
     expect(result).toEqual({
       type: "ssh",
       host: "hostname",
-      srcBaseDir: `/home/${expectedUser}/cmux`,
+      srcBaseDir: `${expectedHomeDir}/cmux`,
     });
   });
 
   test("accepts SSH with hostname.domain only", () => {
     const result = parseRuntimeString("ssh dev.example.com", workspaceName);
     // When no user is specified, uses current user (process.env.USER)
     const expectedUser = process.env.USER ?? "user";
+    const expectedHomeDir = expectedUser === "root" ? "/root" : `/home/${expectedUser}`;
     expect(result).toEqual({
       type: "ssh",
       host: "dev.example.com",
-      srcBaseDir: `/home/${expectedUser}/cmux`,
+      srcBaseDir: `${expectedHomeDir}/cmux`,
+    });
+  });
+
+  test("uses /root for root user", () => {
+    const result = parseRuntimeString("ssh root@hostname", workspaceName);
+    expect(result).toEqual({
+      type: "ssh",
+      host: "root@hostname",
+      srcBaseDir: "/root/cmux",
     });
   });
 

src/utils/chatCommands.ts

@@ -55,12 +55,16 @@ export function parseRuntimeString(
     const atIndex = hostPart.indexOf("@");
     const user = atIndex > 0 ? hostPart.substring(0, atIndex) : process.env.USER ?? "user";
 
+    // Determine home directory path based on user
+    // root user's home is /root, all others are /home/<user>
+    const homeDir = user === "root" ? "/root" : `/home/${user}`;
+
     // Accept both "hostname" and "user@hostname" formats
     // SSH will use current user or ~/.ssh/config if user not specified
     return {
       type: RUNTIME_MODE.SSH,
       host: hostPart,
-      srcBaseDir: `/home/${user}/cmux`, // Default remote base directory (NOT including workspace name)
+      srcBaseDir: `${homeDir}/cmux`, // Default remote base directory (NOT including workspace name)
     };
   }