Support remote server updates from Windows

src/bin/dosh-client.rs

@@ -301,7 +301,7 @@ async fn main() -> Result<()> {
         return run_file_cat_command(&args);
     }
     if args.server.as_deref() == Some("update") {
-        return run_update(&config, parse_update_options(&args.command)?);
+        return run_update(&config, &args, parse_update_options(&args.command)?);
     }
     if args.server.as_deref() == Some("trace") {
         return run_trace_command(&args);
@@ -4097,16 +4097,18 @@ impl UpdateRole {
         }
     }
 
-    fn installer_arg_for_os(self, os: &str) -> Result<&'static str> {
+    fn local_installer_arg_for_os(self, os: &str) -> Option<&'static str> {
         if os == "windows" {
             return match self {
-                UpdateRole::Auto | UpdateRole::Client => Ok("client"),
-                UpdateRole::Server | UpdateRole::Both => {
-                    Err(anyhow!("Windows installs support client updates only"))
-                }
+                UpdateRole::Auto | UpdateRole::Client | UpdateRole::Both => Some("client"),
+                UpdateRole::Server => None,
             };
         }
-        Ok(self.installer_arg())
+        Some(self.installer_arg())
+    }
+
+    fn updates_remote_server_from_os(self, os: &str) -> bool {
+        os == "windows" && matches!(self, UpdateRole::Server | UpdateRole::Both)
     }
 }
 
@@ -4423,7 +4425,11 @@ fn url_reachable(url: &str) -> Result<bool> {
     Ok(status.success())
 }
 
-fn run_update(config: &dosh::config::ClientConfig, options: UpdateOptions) -> Result<()> {
+fn run_update(
+    config: &dosh::config::ClientConfig,
+    args: &Args,
+    options: UpdateOptions,
+) -> Result<()> {
     let repo = config
         .update_repo
         .clone()
@@ -4432,14 +4438,24 @@ fn run_update(config: &dosh::config::ClientConfig, options: UpdateOptions) -> Re
     let os = std::env::consts::OS;
     let installer = update_installer_url(&raw_base, os);
     let artifact = release_artifact_name();
-    let installer_role = options.role.installer_arg_for_os(os)?;
+    let local_installer_role = options.role.local_installer_arg_for_os(os);
+    let update_remote_server = options.role.updates_remote_server_from_os(os);
     if options.check_only {
         let local_version = env!("CARGO_PKG_VERSION");
         let latest_tag = latest_release_tag(&repo)?;
         println!("dosh {local_version}");
         println!("repo: {repo}");
+        if let Some(local_installer_role) = local_installer_role {
             println!("installer: {installer}");
-        println!("role: {installer_role}");
+            println!("role: {local_installer_role}");
+        }
+        if update_remote_server {
+            println!(
+                "remote_installer: {}",
+                update_installer_url(&raw_base, "linux")
+            );
+            println!("remote_server: {}", config.server);
+        }
         match latest_tag.as_deref() {
             Some(tag) => {
                 let latest_version = release_version_from_tag(tag);
@@ -4450,7 +4466,9 @@ fn run_update(config: &dosh::config::ClientConfig, options: UpdateOptions) -> Re
             }
             None => println!("latest: unknown"),
         }
-        if let Some(latest_url) = latest_release_download_url(&repo, &artifact) {
+        if let Some(latest_url) =
+            local_installer_role.and_then(|_| latest_release_download_url(&repo, &artifact))
+        {
             let mut status = "missing";
             let mut display_url = latest_url.clone();
             if let Some(tag_url) =
@@ -4481,15 +4499,27 @@ fn run_update(config: &dosh::config::ClientConfig, options: UpdateOptions) -> Re
         env!("CARGO_PKG_VERSION"),
         latest_release_tag(&repo)?.as_deref(),
     );
+    if update_remote_server {
+        run_remote_server_update(
+            config,
+            args,
+            &repo,
+            &raw_base,
+            &use_prebuilt,
+            binary_version.as_deref(),
+        )?;
+    }
+    if let Some(local_installer_role) = local_installer_role {
         run_update_installer(
             config,
             &repo,
             &installer,
-        installer_role,
+            local_installer_role,
             &update_cache.display().to_string(),
             &use_prebuilt,
             binary_version.as_deref(),
         )?;
+    }
     Ok(())
 }
 
@@ -4546,6 +4576,31 @@ fn run_update_installer(
     Ok(())
 }
 
+fn run_remote_server_update(
+    config: &dosh::config::ClientConfig,
+    args: &Args,
+    repo: &str,
+    raw_base: &str,
+    use_prebuilt: &str,
+    binary_version: Option<&str>,
+) -> Result<()> {
+    anyhow::ensure!(
+        config.server != "user@example.com",
+        "set server in ~/.config/dosh/client.toml before running dosh update --server"
+    );
+    let installer = update_installer_url(raw_base, "linux");
+    let script =
+        remote_unix_server_update_script(config, repo, &installer, use_prebuilt, binary_version);
+    run_remote_script(
+        &config.server,
+        args.ssh_port.or(config.ssh_port),
+        args.ssh_key.as_deref(),
+        args.ssh_known_hosts.as_deref(),
+        &script,
+        "run remote Dosh server update",
+    )
+}
+
 fn unix_update_script(
     config: &dosh::config::ClientConfig,
     repo: &str,
@@ -4580,6 +4635,29 @@ fn unix_update_script(
     script
 }
 
+fn remote_unix_server_update_script(
+    config: &dosh::config::ClientConfig,
+    repo: &str,
+    installer: &str,
+    use_prebuilt: &str,
+    binary_version: Option<&str>,
+) -> String {
+    let mut env = format!(
+        "DOSH_REPO={} DOSH_PORT={} DOSH_UPDATE_QUIET=1 DOSH_USE_PREBUILT={}",
+        shell_word(repo),
+        config.update_port.unwrap_or(config.dosh_port),
+        shell_word(use_prebuilt)
+    );
+    if let Some(version) = binary_version {
+        env.push_str(&format!(" DOSH_BINARY_VERSION={}", shell_word(version)));
+    }
+    format!(
+        "curl -fsSL {} | {} sh -s -- server",
+        shell_word(installer),
+        env
+    )
+}
+
 fn windows_update_script(
     config: &dosh::config::ClientConfig,
     repo: &str,
@@ -10257,25 +10335,25 @@ mod tests {
         queue_or_send_stream_data, queue_pending_user_input, queue_stale_pending_user_input,
         raw_contains_host_table, recv_response_until, refresh_live_addr, release_artifact_name_for,
         release_tag_download_url, release_tag_from_effective_url, release_version_from_tag,
-        render_frame_bytes, render_status_clear, render_status_overlay, requested_env,
-        resolve_forward_agent_endpoint, resolved_startup_command, retire_stream_state,
-        retransmit_stream_closes, retransmit_stream_eofs, retransmit_stream_opens,
-        retransmit_stream_window_adjusts, rewrite_forward_command, sanitize_trace_name,
-        selected_predict_mode, selected_udp_host, send_stream_eof, 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_config_word_for_os, 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_command_word, windows_deferred_update_script, windows_effective_url_script,
-        windows_mode_from_readonly, windows_readonly_from_mode, windows_update_script,
-        windows_url_reachable_script,
+        remote_unix_server_update_script, render_frame_bytes, render_status_clear,
+        render_status_overlay, requested_env, resolve_forward_agent_endpoint,
+        resolved_startup_command, retire_stream_state, retransmit_stream_closes,
+        retransmit_stream_eofs, retransmit_stream_opens, retransmit_stream_window_adjusts,
+        rewrite_forward_command, sanitize_trace_name, selected_predict_mode, selected_udp_host,
+        send_stream_eof, 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_config_word_for_os, 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_command_word,
+        windows_deferred_update_script, windows_effective_url_script, windows_mode_from_readonly,
+        windows_readonly_from_mode, windows_update_script, windows_url_reachable_script,
     };
     use dosh::config::{ClientConfig, CommandExtension, HostConfig};
     use dosh::native::EnvVar;
@@ -12461,21 +12539,31 @@ mod tests {
     }
 
     #[test]
-    fn windows_update_roles_are_client_only() {
+    fn windows_update_roles_split_local_client_and_remote_server() {
         assert_eq!(
-            UpdateRole::Auto.installer_arg_for_os("windows").unwrap(),
-            "client"
+            UpdateRole::Auto.local_installer_arg_for_os("windows"),
+            Some("client")
         );
         assert_eq!(
-            UpdateRole::Client.installer_arg_for_os("windows").unwrap(),
-            "client"
+            UpdateRole::Client.local_installer_arg_for_os("windows"),
+            Some("client")
         );
-        assert!(UpdateRole::Server.installer_arg_for_os("windows").is_err());
-        assert!(UpdateRole::Both.installer_arg_for_os("windows").is_err());
         assert_eq!(
-            UpdateRole::Both.installer_arg_for_os("linux").unwrap(),
-            "both"
+            UpdateRole::Server.local_installer_arg_for_os("windows"),
+            None
         );
+        assert_eq!(
+            UpdateRole::Both.local_installer_arg_for_os("windows"),
+            Some("client")
+        );
+        assert!(UpdateRole::Server.updates_remote_server_from_os("windows"));
+        assert!(UpdateRole::Both.updates_remote_server_from_os("windows"));
+        assert!(!UpdateRole::Client.updates_remote_server_from_os("windows"));
+        assert_eq!(
+            UpdateRole::Both.local_installer_arg_for_os("linux"),
+            Some("both")
+        );
+        assert!(!UpdateRole::Both.updates_remote_server_from_os("linux"));
     }
 
     #[test]
@@ -12523,6 +12611,31 @@ mod tests {
         assert!(!windows.contains(" sh -s "));
     }
 
+    #[test]
+    fn windows_server_update_uses_remote_unix_installer_script() {
+        let config = ClientConfig {
+            server: "palav".to_string(),
+            dosh_port: 50000,
+            update_port: Some(50001),
+            ..ClientConfig::default()
+        };
+        let script = remote_unix_server_update_script(
+            &config,
+            "https://git.palav.dev/Palav/dosh.git",
+            "https://git.palav.dev/Palav/dosh/raw/branch/main/install.sh",
+            "1",
+            Some("v1.0.0-rc41"),
+        );
+        assert!(script.contains("curl -fsSL"));
+        assert!(script.contains("install.sh"));
+        assert!(script.contains("DOSH_REPO='https://git.palav.dev/Palav/dosh.git'"));
+        assert!(script.contains("DOSH_PORT=50001"));
+        assert!(script.contains("DOSH_BINARY_VERSION='v1.0.0-rc41'"));
+        assert!(script.contains(" sh -s -- server"));
+        assert!(!script.contains("install.ps1"));
+        assert!(!script.contains("DOSH_ROLE='client'"));
+    }
+
     #[test]
     fn windows_update_script_waits_for_parent_before_replacing_locked_exe() {
         let installer = windows_update_script(