Merge pull request #11 from Rummskartoffel/windows-installer

Add new Windows installer

installers/windows.ps1

@@ -0,0 +1,123 @@
+<#
+.Parameter Uninstall
+    Whether to uninstall an existing native messenger installation.
+.Parameter Tag
+    The Tridactyl version to which the corresponding version of the native
+    messenger should be installed. Tridactyl versions lower than 1.21.0 are not
+    supported.
+.Parameter InstallDirectory
+    The directory in which the native messenger should be installed. Defaults
+    to "$env:USERPROFILE\.tridactyl". This parameter is not honoured when an
+    existing installation is found.
+#>
+Param (
+    [switch]$Uninstall = $false,
+    [string]$Tag = "master",
+    [string]$InstallDirectory = "$env:USERPROFILE\.tridactyl"
+)
+
+function Get-ExistingManifest {
+    if (Test-Path "HKCU:\SOFTWARE\Mozilla\NativeMessagingHosts\tridactyl") {
+        $ManifestLocation = (Get-ItemProperty "HKCU:\SOFTWARE\Mozilla\NativeMessagingHosts\tridactyl")."(default)"
+        if ($ManifestLocation -and (Test-Path $ManifestLocation)) {
+            return Get-Item $ManifestLocation
+        }
+    }
+    return $null
+}
+
+function Install-NativeMessenger {
+if ($ExistingManifest = Get-ExistingManifest) {
+    $InstallDirectory = $ExistingManifest.Directory
+}
+
+    # Pre-5.1 versions of Powershell might not have a TLS version that GitHub
+    # supports enabled by default.
+    [Net.ServicePointManager]::SecurityProtocol = `
+        [Net.ServicePointManager]::SecurityProtocol -bor [Net.SecurityProtocolType]::Tls12
+
+    $MessengerVersion = (Invoke-WebRequest `
+            "https://raw.githubusercontent.com/tridactyl/tridactyl/$Tag/native/current_native_version").`
+        Content.Trim()
+    Write-Output "Installing native messenger version $MessengerVersion in $InstallDirectory"
+
+    Write-Output "Entering $InstallDirectory"
+    New-Item -ItemType Directory $InstallDirectory -Force > $null
+    Push-Location $InstallDirectory
+
+    Write-Output "Downloading native messenger"
+    Invoke-WebRequest `
+        "https://github.com/tridactyl/native_messenger/releases/download/$MessengerVersion/native_main-Windows" `
+        -OutFile "native_main.exe"
+
+    Write-Output "Downloading manifest"
+    (Invoke-WebRequest `
+            "https://raw.githubusercontent.com/tridactyl/native_messenger/$MessengerVersion/tridactyl.json").`
+        Content.Replace("REPLACE_ME_WITH_SED", "native_main.exe") |
+        Set-Content -Path "tridactyl.json"
+
+    Write-Output "Registering native messenger"
+    New-Item -ItemType Directory `
+        "HKCU:\SOFTWARE\Mozilla\NativeMessagingHosts\tridactyl" `
+        -Force > $null
+    New-ItemProperty -Path "HKCU:\SOFTWARE\Mozilla\NativeMessagingHosts\tridactyl" `
+        -Name "(default)" -PropertyType String `
+        -Value $((Get-Item "tridactyl.json").FullName) `
+        -Force > $null
+
+    Copy-Item $PSCommandPath "installer.ps1"
+
+    Write-Output "Exiting $InstallDirectory"
+    Pop-Location
+    Write-Output "Done"
+    Write-Output @"
+The installer for the native messenger has been copied to $InstallDirectory.
+To uninstall the native messenger, navigate to that directory in Powershell
+and run ".\installer.ps1 -Uninstall".
+"@
+    exit
+}
+
+function Uninstall-NativeMessenger {
+    if (-not ($ExistingManifest = Get-ExistingManifest)) {
+        Write-Error "Native messenger not found, cannot uninstall!"
+        exit 1
+    } else {
+        $InstallDirectory = $ExistingManifest.Directory
+    }
+
+    $yes = New-Object System.Management.Automation.Host.ChoiceDescription `
+        "&Yes", "Uninstall the native messenger."
+    $no = New-Object System.Management.Automation.Host.ChoiceDescription `
+        "&No", "Do nothing."
+    if ($Host.UI.PromptForChoice("Uninstall native messenger", `
+                "Are you sure you want to uninstall the native messenger from $InstallDirectory`?",
+            @($yes, $no), 1) -eq 1) {
+        Write-Output "Uninstallation cancelled"
+        exit
+    }
+
+    Write-Output "Unregistering messenger"
+    Remove-Item -Path "HKCU:\SOFTWARE\Mozilla\NativeMessagingHosts\tridactyl" `
+        -Force -Recurse
+
+    Write-Output "Entering $InstallDirectory"
+    Push-Location $InstallDirectory
+
+    Write-Output "Deleting messenger, manifest, and installer"
+    # We don't care about errors finding the files - that just means we don't
+    # have to remove them. We do care about errors deleting them, because that
+    # might mean manual intervention is necessary to completely remove the
+    # native messenger.
+    Get-ChildItem "native_main.exe", "tridactyl.json", "installer.ps1" -ErrorAction SilentlyContinue | Remove-Item
+
+    Write-Output "Exiting $InstallDirectory"
+    Pop-Location
+    Write-Output "Done"
+}
+
+if ($Uninstall) {
+    Uninstall-NativeMessenger
+} else {
+    Install-NativeMessenger
+}