[pkg] abort install if we running an old version0.21.2

stop if:

- bitmask is running (we don't want to mess with the helper if the app
  is running)
- we cannot stop the service for some reason.

powershell gives more flexibility to stop services, but Remove-Service
is not present in PS < 6, so we try to remove the service from the
post-install too (the golang helper will complain about an eventlog
registry key).

this could probably be improved in the helper, but we'll be moving to
the official openvpnserv2 service for 0.21.4. we might want to revisit
the current helper for the firewall/killswitch.

1 files changed, 22 insertions, 2 deletions

diff --git a/branding/templates/qtinstaller/packages/bitmaskvpn/meta/install.js b/branding/templates/qtinstaller/packages/bitmaskvpn/meta/install.js
index dada918..b82e032 100644
--- a/branding/templates/qtinstaller/packages/bitmaskvpn/meta/install.js
+++ b/branding/templates/qtinstaller/packages/bitmaskvpn/meta/install.js
@@ -61,6 +61,9 @@ Component.prototype.createOperations = function ()
     if (systemInfo.productType === "osx") {
         preInstallOSX();
     }
+    if (systemInfo.productType === "windows") {
+	preInstallWindows();
+    }
     // This will actually install the files
     component.createOperations();
 
@@ -80,11 +83,28 @@ Component.prototype.createOperations = function ()
     }
 }
 
+function preInstallWindows() {
+    console.log("Pre-installation for Windows: check for running bitmask");
+    component.addOperation(
+	"Execute", "{1}", "powershell", "-NonInteractive", "-NoProfile", "-command", "try {Get-Process $BINNAME} catch { exit 1}",
+	"errormessage=It seems that an old RiseupVPN client is running. Please exit the app and run this installer again.",
+    );
+    /* Remove-Service only introduced in PS 6.0 */
+    component.addElevatedOperation(
+	"Execute", "{0}", "powershell", "-NonInteractive", "-NoProfile", "-command",
+	"try {Get-Service bitmask-helper-v2} catch {exit 0}; try {Stop-Service bitmask-helper-v2} catch {}; try {$$srv = Get-Service bitmask-helper-v2; if ($$srv.Status -eq 'Running') {exit 1} else {exit 0};} catch {exit 0}",
+	"errormessage=It seems that bitmask-helper-v2 service is running, and we could not stop it. Please manually uninstall any previous RiseupVPN or CalyxVPN client and run this installer again.",
+    );
+}
+
 function postInstallWindows() {
     // TODO - check if we're on Windows10 or older, and use the needed tap-windows installer accordingly.
     console.log("Installing OpenVPN tap driver");
-    component.addElevatedOperation("Execute", "@TargetDir@/tap-windows.exe", "/S", "/SELECT_UTILITIES=1");  /* TODO uninstall? */
-    console.log("Now trying to install our helper");
+    component.addElevatedOperation("Execute", "@TargetDir@/tap-windows.exe", "/S", "/SELECT_UTILITIES=1");  /* TODO uninstall */
+    /* remove an existing service, if it is stopped. Remove-Service is only in PS>6, and sc.exe delete leaves some garbage on the registry, so let's use the binary itself */
+    console.log("Removing any previously installer helper...");
+    component.addElevatedOperation("Execute", "{0,1}", "@TargetDir@/helper.exe", "remove");
+    console.log("Now trying to install latest helper");
     component.addElevatedOperation("Execute", "@TargetDir@/helper.exe", "install", "UNDOEXECUTE", "@TargetDir@/helper.exe", "remove");
     component.addElevatedOperation("Execute", "@TargetDir@/helper.exe", "start", "UNDOEXECUTE", "@TargetDir@/helper.exe", "stop");
     console.log("Adding shortcut entries/...");