Make launcher mode behaviour more robust

src/frontend/ui/mod.rs

@@ -12,6 +12,7 @@ use log::Level;
 enum CallbackType {
     SelectInstallDir { callback_name: String },
     Log { msg: String, kind: String },
+    Test {}
 }
 
 /// Starts the main web UI. Will return when UI is closed.
@@ -58,9 +59,11 @@ pub fn start_ui(app_name: &str, http_address: &str, is_launcher: bool) {
                         _ => Level::Error,
                     };
 
-                    log!(target: "liftinstall::frontend-js", kind, "{}", msg);
+                    log!(target: "liftinstall::frontend::js", kind, "{}", msg);
                 }
+                CallbackType::Test {} => {}
             }
+
             cb_result
         })
         .run()

src/installer.rs

@@ -82,8 +82,6 @@ pub struct InstallerFramework {
     // If we just completed an uninstall, and we should clean up after ourselves.
     pub burn_after_exit: bool,
     pub launcher_path: Option<String>,
-
-    attempted_shutdown: bool,
 }
 
 /// Contains basic properties on the status of the session. Subset of InstallationFramework.
@@ -400,27 +398,22 @@ impl InstallerFramework {
 
     /// Shuts down the installer instance.
     pub fn shutdown(&mut self) -> Result<(), String> {
-        if self.attempted_shutdown {
-            return Err("Cannot attempt shutdown twice!".to_string());
-        }
-
-        self.attempted_shutdown = true;
-
         info!("Shutting down installer framework...");
 
-        if let Some(ref v) = self.launcher_path {
+        if let Some(ref v) = self.launcher_path.take() {
             info!("Launching {:?}", v);
 
             Command::new(v)
                 .stdout(Stdio::null())
                 .stderr(Stdio::null())
                 .spawn()
-                .map_err(|x| format!("Unable to start child process: {:?}", x))?;
+                .map_err(|x| format!("Unable to start application: {:?}", x))?;
         }
 
         if self.burn_after_exit {
             info!("Requesting that self be deleted after exit.");
             native::burn_on_exit(&self.base_attributes.name);
+            self.burn_after_exit = false;
         }
 
         Ok(())
@@ -437,7 +430,6 @@ impl InstallerFramework {
             is_launcher: false,
             burn_after_exit: false,
             launcher_path: None,
-            attempted_shutdown: false,
         }
     }
 
@@ -465,7 +457,6 @@ impl InstallerFramework {
             is_launcher: false,
             burn_after_exit: false,
             launcher_path: None,
-            attempted_shutdown: false,
         })
     }
 }

ui/src/main.js

@@ -21,10 +21,20 @@ function intercept (method) {
   }
 }
 
+// See if we have access to the JSON interface
+var has_external_interface = false;
+try {
+  window.external.invoke(JSON.stringify({
+    Test: {}
+  }))
+  has_external_interface = true;
+} catch (e) {
+  console.warn("Running without JSON interface - unexpected behaviour may occur!")
+}
+
 // Overwrite loggers with the logging backend
-if (window.external !== undefined && window.external.invoke !== undefined) {
+if (has_external_interface) {
   window.onerror = function (msg, url, line) {
-    old_onerror(msg, url, line)
     window.external.invoke(
       JSON.stringify({
         Log: {
@@ -89,12 +99,13 @@ var app = new Vue({
         '/api/exit',
         function () {},
         function (msg) {
-          alert(
-            'LiftInstall encountered an error while exiting: ' +
-              msg +
-              '\nPlease upload the log file (in the same directory as the installer) to ' +
-              'the respective maintainers for this application (where you got it from!)'
-          )
+          var search_location = app.metadata.install_path.length > 0 ? app.metadata.install_path :
+            "the location where this installer is";
+
+          app.$router.replace({ name: 'showerr', params: { msg: msg +
+                '\n\nPlease upload the log file (in ' + search_location + ') to ' +
+                'the ' + app.attrs.name + ' team'
+          }});
         }
       )
     },
@@ -102,3 +113,5 @@ var app = new Vue({
     stream_ajax: stream_ajax
   }
 }).$mount('#app')
+
+console.log("Vue started")

ui/src/views/ErrorView.vue

@@ -6,7 +6,8 @@
 
             <div class="field is-grouped is-right-floating is-bottom-floating">
                 <p class="control">
-                    <a class="button is-primary is-medium" v-if="remaining" v-on:click="go_back">Back</a>
+                    <a class="button is-primary is-medium" v-if="remaining && !is_launcher" v-on:click="go_back">Back</a>
+                    <a class="button is-primary is-medium" v-if="is_launcher" v-on:click="exit">Exit</a>
                 </p>
             </div>
     </div>

ui/src/views/InstallPackages.vue

@@ -60,6 +60,8 @@ export default {
       }
 
       this.$root.stream_ajax(targetUrl, function (line) {
+        // On progress line received from server
+
         if (line.hasOwnProperty('Status')) {
           that.progress_message = line.Status[0]
           that.progress = line.Status[1] * 100
@@ -70,14 +72,12 @@ export default {
         }
 
         if (line.hasOwnProperty('Error')) {
-          if (app.metadata.is_launcher) {
-            app.exit()
-          } else {
           that.failed_with_error = true
           that.$router.replace({ name: 'showerr', params: { msg: line.Error } })
         }
-        }
       }, function (e) {
+        // On request completed
+
         if (that.is_updater_update) {
           // Continue with what we were doing
           if (app.metadata.is_launcher) {