Add PowerShell installation script for AWS Credential Manager and upd…

…ate README with PowerShell usage instructions

README.md

@@ -24,11 +24,18 @@ curl https://raw.githubusercontent.com/ellosoft/aws-cred-mgr/main/scripts/instal
 winget install ellosoft-aws-cred-mgr
 ```
 
+#### PowerShell (in case winget is blocked by your organization)
+
+```powershell
+iwr -useb https://raw.githubusercontent.com/ellosoft/aws-cred-mgr/main/scripts/install-aws-cred-mgr.ps1 | iex
+```
+
 ### Manual
 
 You can manually install `aws-cred-mgr` by downloading the latest version from the [GitHub Release](https://github.com/ellosoft/aws-cred-mgr/releases) page.
 
-> Note: On Linux or MacOs systems you need to make the binary executable before you can use it. You can do this by running `chmod +x aws-cred-mgr` in the terminal.
+> [!Note]
+> On Linux or MacOs systems you need to make the binary executable before you can use it. You can do this by running `chmod +x aws-cred-mgr` in the terminal.
 
 ## Usage
 

scripts/install-aws-cred-mgr.ps1

@@ -0,0 +1,80 @@
+function Add-ToPathPermanently($Path) {
+    $currentPath = [Environment]::GetEnvironmentVariable("Path", [System.EnvironmentVariableTarget]::User)
+    if ($currentPath -notlike "*$Path*") {
+        $newPath = $currentPath.TrimEnd(';') + ";$Path"
+        [Environment]::SetEnvironmentVariable("Path", $newPath, [System.EnvironmentVariableTarget]::User)
+        $env:Path = $newPath
+    }
+}
+
+function Get-SystemArchitecture {
+    switch ($env:PROCESSOR_ARCHITECTURE) {
+        "AMD64" { return "x64" }
+        "ARM64" { return "arm64" }
+        "x86"   { return "x86" }
+        default { throw "Unsupported architecture: $env:PROCESSOR_ARCHITECTURE" }
+    }
+}
+
+function Get-LatestReleaseInfo($architecture) {
+    $releaseInfo = Invoke-RestMethod -Uri "https://api.github.com/repos/ellosoft/aws-cred-mgr/releases/latest"
+    $asset = $releaseInfo.assets | Where-Object { $_.name -like "*win-$architecture.exe" }
+
+    if ($null -eq $asset) {
+        throw "Could not find a $architecture executable in the latest release."
+    }
+
+    return @{
+        DownloadUrl = $asset.browser_download_url
+        ExpectedFileSize = $asset.size
+    }
+}
+
+function Create-InstallationDirectory {
+    $installDir = "$env:USERPROFILE\.aws_cred_mgr\bin"
+    New-Item -ItemType Directory -Force -Path $installDir | Out-Null
+    return $installDir
+}
+
+function Download-File($url, $outputPath, $expectedSize) {
+    $ProgressPreference = 'SilentlyContinue'
+    try {
+        Write-Host "Downloading aws-cred-mgr to $outputPath..."
+        Invoke-WebRequest -Uri $url -OutFile $outputPath -UseBasicParsing -Headers @{"Cache-Control"="no-cache"} -ContentType 'application/octet-stream' -Verbose:$false
+
+        # TODO: Replace this with a checksum verification
+        if ((Get-Item $outputPath).Length -ne $expectedSize){
+            throw "The file size of the downloaded file does not match the expected size."
+        }
+
+        Write-Host "Download completed successfully."
+    }
+    finally {
+        $ProgressPreference = 'Continue'
+    }
+}
+
+function Install-AwsCredMgr {
+    $architecture = Get-SystemArchitecture
+    $architecture = "x64" # TODO: Remove once the ARM64 release is available
+
+    $releaseInfo = Get-LatestReleaseInfo $architecture
+    $installDir = Create-InstallationDirectory
+    $outputPath = Join-Path $installDir "aws-cred-mgr.exe"
+
+    Download-File -url $releaseInfo.DownloadUrl -outputPath $outputPath -expectedSize $releaseInfo.ExpectedFileSize
+
+    Add-ToPathPermanently $installDir
+
+    Write-Host ""
+    Write-Host "aws-cred-mgr has been successfully installed!" -ForegroundColor Green
+    Write-Host "You can now use aws-cred-mgr by running 'aws-cred-mgr' in your terminal." -ForegroundColor Green
+}
+
+try {
+    Install-AwsCredMgr
+}
+catch {
+    Write-Host "Failed to install aws-cred-mgr: $_" -ForegroundColor Red
+    Write-Host "Please try again or download the latest version from https://github.com/ellosoft/aws-cred-mgr/releases." -ForegroundColor Red
+}