Make token optional to client

Still need UI work to not ask for the token when it is not needed, but
the client and cli will now work without one.

Author: code-asher

src/main/kotlin/com/coder/gateway/CoderGatewayConnectionProvider.kt

@@ -146,8 +146,11 @@ class CoderGatewayConnectionProvider : GatewayConnectionProvider {
                 indicator,
             )
 
-            indicator.text = "Authenticating Coder CLI..."
-            cli.login(client.token)
+            // We only need to log in if we are using token-based auth.
+            if (client.token !== null) {
+                indicator.text = "Authenticating Coder CLI..."
+                cli.login(client.token)
+            }
 
             indicator.text = "Configuring Coder CLI..."
             cli.configSsh(client.agentNames(workspaces))

src/main/kotlin/com/coder/gateway/sdk/CoderRestClient.kt

@@ -56,9 +56,11 @@ data class ProxyValues(
 
 /**
  * An HTTP client that can make requests to the Coder API.
+ *
+ * The token can be omitted if some other authentication mechanism is in use.
  */
 open class CoderRestClient(
-    var url: URL, var token: String,
+    val url: URL, val token: String?,
     private val settings: CoderSettings = CoderSettings(CoderSettingsState()),
     private val proxyValues: ProxyValues? = null,
     private val pluginVersion: String = "development",
@@ -95,10 +97,13 @@ open class CoderRestClient(
                 }
         }
 
+        if (token != null) {
+            builder = builder.addInterceptor { it.proceed(it.request().newBuilder().addHeader("Coder-Session-Token", token).build()) }
+        }
+
         httpClient = builder
             .sslSocketFactory(socketFactory, trustManagers[0] as X509TrustManager)
             .hostnameVerifier(CoderHostnameVerifier(settings.tls.altHostname))
-            .addInterceptor { it.proceed(it.request().newBuilder().addHeader("Coder-Session-Token", token).build()) }
             .addInterceptor { it.proceed(it.request().newBuilder().addHeader("User-Agent", "Coder Gateway/${pluginVersion} (${getOS()}; ${getArch()})").build()) }
             .addInterceptor {
                 var request = it.request()

src/main/kotlin/com/coder/gateway/services/CoderRestClientService.kt

@@ -13,7 +13,7 @@ import java.net.URL
  * A client instance that hooks into global JetBrains services for default
  * settings.
  */
-class CoderRestClientService(url: URL, token: String, httpClient:OkHttpClient? = null) : CoderRestClient(url, token,
+class CoderRestClientService(url: URL, token: String?, httpClient:OkHttpClient? = null) : CoderRestClient(url, token,
     service<CoderSettingsService>(),
     ProxyValues(HttpConfigurable.getInstance().proxyLogin,
         HttpConfigurable.getInstance().plainProxyPassword,

src/main/kotlin/com/coder/gateway/settings/CoderSettings.kt

@@ -182,7 +182,7 @@ open class CoderSettings(
         return try {
             Files.readString(dir.resolve("url")) to Files.readString(dir.resolve("session"))
         } catch (e: Exception) {
-            // SSH has not been configured yet.
+            // SSH has not been configured yet, or using some other authorization mechanism.
             null to null
         }
     }