Merge pull request 'winUninstall' (#434) from winUninstall into trunk

Reviewed-on: https://git.openprivacy.ca/cwtch.im/cwtch-ui/pulls/434
Reviewed-by: Sarah Jamie Lewis <sarah@openprivacy.ca>

lib/cwtch/ffi.dart

@@ -160,7 +160,13 @@ class CwtchFfi implements Cwtch {
       }
     } else if (Platform.isWindows) {
       cwtchDir = envVars['CWTCH_DIR'] ?? path.join(envVars['UserProfile']!, ".cwtch");
-      bundledTor = "Tor\\Tor\\tor.exe";
+      String currentTor = path.join(Directory.current.absolute.path, "Tor\\Tor\\tor.exe");
+      if (await File(currentTor).exists()) {
+        bundledTor = currentTor;
+      } else {
+        String exeDir = path.dirname(Platform.resolvedExecutable);
+        bundledTor = path.join(exeDir, "Tor\\Tor\\tor.exe");
+      }
     } else if (Platform.isMacOS) {
       cwtchDir = envVars['CWTCH_HOME'] ?? path.join(envVars['HOME']!, "Library/Application Support/Cwtch");
       if (await File("Cwtch.app/Contents/MacOS/Tor/tor.real").exists()) {

windows/nsis/cwtch-installer.nsi

@@ -50,7 +50,10 @@ ShowInstDetails show
 
 !define MUI_WELCOMEPAGE_TITLE "Welcome to the Cwtch installer"
 !define MUI_WELCOMEPAGE_TEXT "Cwtch (pronounced: kutch) is a Welsh word roughly meaning 'a hug that creates a safe space'$\n$\n\
-                              Cwtch is a platform for building consentful, decentralized, untrusted infrastructure using metadata resistant group communication applications. Currently there is a selfnamed instant messaging prototype app that is driving development and testing. Many Further apps are planned as the platform matures."
+                              Cwtch is a platform for building consentful, decentralized, untrusted infrastructure using metadata resistant group communication applications. Currently there is a selfnamed instant messaging prototype app that is driving development and testing. Many Further apps are planned as the platform matures.$\n$\n\
+                              Please close any running copies of Cwtch before installing a new version."
+
+; Detecting if Cwtch is running and reminding the user or closing it appears to require 3rd party plugins that take the form of decade+ old .dlls in zips from a wiki...
 
 !define MUI_FINISHPAGE_TITLE "Enjoy Cwtch"
 !define MUI_FINISHPAGE_RUN $INSTDIR/cwtch.exe
@@ -96,10 +99,16 @@ Section
 
     WriteUninstaller "$INSTDIR\uninstall.exe"
 
+    # https://nsis.sourceforge.io/Add_uninstall_information_to_Add/Remove_Programs
+    WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\Cwtch" \
+                     "DisplayName" "Cwtch"
+    WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\Cwtch" \
+                     "UninstallString" "$\"$INSTDIR\uninstall.exe$\""
 SectionEnd
 
 Section "Uninstall"
     RMDir /r /REBOOTOK "$INSTDIR"
 
     DeleteRegKey /ifempty HKCU "Software\Cwtch\installLocation"
+    DeleteRegKey HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\ImageMaker"
 SectionEnd