Parse bracketed IPv6 file endpoints

src/bin/dosh-client.rs

@@ -9600,23 +9600,24 @@ mod tests {
         input_matches_escape, is_local_status_target, is_resume_response_for_client,
         latest_release_download_url, load_first_native_identity_with_prompt,
         native_proxy_udp_warning, newest_client_trace_path_from, parse_dynamic_forward,
-        parse_escape_key, parse_local_forward, parse_remote_forward, parse_ssh_config,
-        parse_trace_line, parse_trace_options, parse_trace_report_options, parse_trace_summary,
-        parse_update_options, post_submit_hold_duration, queue_pending_user_input,
-        queue_stale_pending_user_input, raw_contains_host_table, recv_response_until,
-        refresh_live_addr, release_tag_download_url, release_tag_from_effective_url,
-        release_version_from_tag, render_status_clear, render_status_overlay, requested_env,
-        resolved_startup_command, retire_stream_state, retransmit_stream_opens,
-        rewrite_forward_command, sanitize_trace_name, selected_predict_mode, selected_udp_host,
-        server_version_mismatch, should_flush_terminal_input_after_contact,
-        should_health_log_client_start, should_hold_during_startup_gate,
-        should_hold_post_submit_input, should_reconnect_before_input_for_local_sleep,
-        should_repaint_idle_terminal, should_strip_unowned_terminal_reports,
-        split_after_command_submit, split_trace_tokens, ssh_command_target, ssh_config_uses_proxy,
-        ssh_destination_host, ssh_username, ssh_with_user, startup_command, status_ssh_target,
-        strip_stale_mouse_reports, strip_terminal_focus_reports, strip_unowned_terminal_reports,
-        summarize_trace_file, summarize_trace_file_with_mode, terminal_private_mode_transition,
-        toml_bare_key_or_quoted, top_trace_events, trace_report_warnings, unix_update_script,
+        parse_escape_key, parse_local_forward, parse_remote_forward, parse_single_remote_path,
+        parse_ssh_config, parse_trace_line, parse_trace_options, parse_trace_report_options,
+        parse_trace_summary, parse_update_options, post_submit_hold_duration,
+        queue_pending_user_input, queue_stale_pending_user_input, raw_contains_host_table,
+        recv_response_until, refresh_live_addr, release_tag_download_url,
+        release_tag_from_effective_url, release_version_from_tag, render_status_clear,
+        render_status_overlay, requested_env, resolved_startup_command, retire_stream_state,
+        retransmit_stream_opens, rewrite_forward_command, sanitize_trace_name,
+        selected_predict_mode, selected_udp_host, server_version_mismatch,
+        should_flush_terminal_input_after_contact, should_health_log_client_start,
+        should_hold_during_startup_gate, should_hold_post_submit_input,
+        should_reconnect_before_input_for_local_sleep, should_repaint_idle_terminal,
+        should_strip_unowned_terminal_reports, split_after_command_submit, split_trace_tokens,
+        ssh_command_target, ssh_config_uses_proxy, ssh_destination_host, ssh_username,
+        ssh_with_user, startup_command, status_ssh_target, strip_stale_mouse_reports,
+        strip_terminal_focus_reports, strip_unowned_terminal_reports, summarize_trace_file,
+        summarize_trace_file_with_mode, terminal_private_mode_transition, toml_bare_key_or_quoted,
+        top_trace_events, trace_report_warnings, unix_update_script,
         update_binary_version_for_installer, update_installer_url, update_version_status,
         upsert_managed_block, valid_forward_host, vscode_safe_alias, wake_repaint_retry_deadline,
         windows_update_script,
@@ -11709,6 +11710,19 @@ mod tests {
         assert!(valid_forward_host("server.example.com"));
     }
 
+    #[test]
+    fn single_remote_path_accepts_bracketed_ipv6_hosts() {
+        assert_eq!(
+            parse_single_remote_path("[2001:db8::1]:/tmp/file", "cat").unwrap(),
+            ("2001:db8::1".to_string(), "/tmp/file".to_string())
+        );
+        assert_eq!(
+            parse_single_remote_path("[::1]:", "ls").unwrap(),
+            ("::1".to_string(), ".".to_string())
+        );
+        assert!(parse_single_remote_path("[::1]", "ls").is_err());
+    }
+
     #[test]
     fn recover_removes_only_matching_cached_credentials() {
         let dir = tempfile::tempdir().unwrap();

src/file_transfer.rs

@@ -165,6 +165,12 @@ pub fn parse_copy_endpoint(raw: &str) -> CopyEndpoint {
     if looks_like_windows_path(raw) {
         return CopyEndpoint::Local(PathBuf::from(raw));
     }
+    if let Some((host, path)) = parse_bracketed_remote_endpoint(raw) {
+        return CopyEndpoint::Remote { host, path };
+    }
+    if raw.starts_with('[') {
+        return CopyEndpoint::Local(PathBuf::from(raw));
+    }
     let Some(index) = raw.find(':') else {
         return CopyEndpoint::Local(PathBuf::from(raw));
     };
@@ -183,6 +189,25 @@ pub fn parse_copy_endpoint(raw: &str) -> CopyEndpoint {
     }
 }
 
+fn parse_bracketed_remote_endpoint(raw: &str) -> Option<(String, String)> {
+    let rest = raw.strip_prefix('[')?;
+    let close = rest.find(']')?;
+    let host = &rest[..close];
+    let suffix = &rest[close + 1..];
+    if host.is_empty() || host.contains('/') || host.contains('\\') || !suffix.starts_with(':') {
+        return None;
+    }
+    let path = &suffix[1..];
+    Some((
+        host.to_string(),
+        if path.is_empty() {
+            ".".to_string()
+        } else {
+            path.to_string()
+        },
+    ))
+}
+
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub enum CopyEndpoint {
     Local(PathBuf),
@@ -277,4 +302,30 @@ mod tests {
             CopyEndpoint::Local(PathBuf::from("C:\\Users\\palav\\x"))
         );
     }
+
+    #[test]
+    fn copy_endpoint_parses_bracketed_ipv6_remote_paths() {
+        assert_eq!(
+            parse_copy_endpoint("[2001:db8::1]:/var/log/syslog"),
+            CopyEndpoint::Remote {
+                host: "2001:db8::1".to_string(),
+                path: "/var/log/syslog".to_string()
+            }
+        );
+        assert_eq!(
+            parse_copy_endpoint("[::1]:"),
+            CopyEndpoint::Remote {
+                host: "::1".to_string(),
+                path: ".".to_string()
+            }
+        );
+        assert_eq!(
+            parse_copy_endpoint("[bad/host]:path"),
+            CopyEndpoint::Local(PathBuf::from("[bad/host]:path"))
+        );
+        assert_eq!(
+            parse_copy_endpoint("[::1]"),
+            CopyEndpoint::Local(PathBuf::from("[::1]"))
+        );
+    }
 }