Updated CLI installation script (#69)

* Updated CLI installation script

* updated ps1 based on comment

* nit

* nit

* fixed windows

* updated ps1

* nit

cli/installers/install-drasi-cli.ps1

@@ -0,0 +1,146 @@
+param (
+    [string]$Version,
+    [string]$DrasiRoot = "$env:LOCALAPPDATA\drasi"
+)
+
+Write-Output ""
+$ErrorActionPreference = 'stop'
+
+$DrasiRoot = $DrasiRoot -replace ' ', '` '
+
+$DrasiCliFileName = "drasi.exe"
+$DrasiCliFilePath = "${DrasiRoot}\${DrasiCliFileName}"
+$OS = "windows"
+$Arch = "x64"
+$GitHubOrg = "drasi-project"
+$GitHubRepo = "drasi-platform"
+$GitHubReleaseJsonUrl = "https://api.github.com/repos/${GitHubOrg}/${GitHubRepo}/releases"
+
+
+function GetVersionInfo {
+    param (
+        [string]$Version,
+        $Releases
+    )
+    # Filter windows binary and download archive
+    if (!$Version) {
+        $release = $Releases | Where-Object { $_.tag_name -notlike "*rc*" } | Select-Object -First 1
+    }
+    else {
+        $release = $Releases | Where-Object { $_.tag_name -eq "$Version" } | Select-Object -First 1
+    }
+
+    return $release
+}
+
+
+function GetWindowsAsset {
+    param (
+        $Release
+    )
+    $windowsAsset = $Release | Select-Object -ExpandProperty assets | Where-Object { $_.name -Like "*${OS}-${Arch}.exe" }
+    if (!$windowsAsset) {
+        throw "Cannot find the Windows drasi CLI binary"
+    }
+    [hashtable]$return = @{}
+    $return.url = $windowsAsset.url
+    $return.name = $windowsAsset.name
+
+    return $return
+}
+
+
+
+if ((Get-ExecutionPolicy) -gt 'RemoteSigned' -or (Get-ExecutionPolicy) -eq 'ByPass') {
+    Write-Output "PowerShell requires an execution policy of 'RemoteSigned'."
+    Write-Output "To make this change please run:"
+    Write-Output "'Set-ExecutionPolicy RemoteSigned -scope CurrentUser'"
+    break
+}
+
+# Change security protocol to support TLS 1.2 / 1.1 / 1.0 - old powershell uses TLS 1.0 as a default protocol
+[Net.ServicePointManager]::SecurityProtocol = "tls12, tls11, tls"
+
+if (Test-Path $DrasiCliFilePath -PathType Leaf) {
+    Write-Output "Previous Drasi CLI detected"
+    Write-Output "Reinstalling Drasi CLI..."
+}
+else {
+    Write-Output "Installing Drasi CLI..."
+}
+
+if (-Not (Test-Path $DrasiRoot -PathType Container)) {
+    Write-Output "Creating $DrasiRoot directory..."
+    New-Item -ErrorAction Ignore -Path $DrasiRoot -ItemType "directory" | Out-Null
+    if (!(Test-Path $DrasiRoot -PathType Container)) {
+        throw "Cannot create $DrasiRoot"
+    }
+}
+
+$releases = Invoke-RestMethod -Uri $GitHubReleaseJsonUrl -Headers $githubHeader -Method Get
+if ($releases.Count -eq 0) {
+    throw "No releases from github.com/${GitHubOrg}/${GitHubRepo}"
+}
+
+$release = GetVersionInfo -Version $Version -Releases $releases
+if (!$release) {
+    throw "Cannot find the specified drasi CLI binary version"
+}
+
+$asset = GetWindowsAsset -Release $release
+$assetName = $asset.name
+$exeFileUrl = $asset.url
+$exeFilePath = "${DrasiRoot}\${assetName}"
+
+Write-Output "path $exeFilePath"
+try {
+    Write-Output "Downloading $exeFileUrl"
+    $githubHeader = @{
+        Accept = "application/octet-stream"
+    }
+    $oldProgressPreference = $ProgressPreference
+    $ProgressPreference = "SilentlyContinue" # Do not show progress bar
+    Invoke-WebRequest -Headers $githubHeader -Uri $exeFileUrl -OutFile $exeFilePath
+}
+catch [Net.WebException] {
+    throw "ERROR: The specified release version: $Version does not exist."
+}
+finally {
+    $ProgressPreference = $oldProgressPreference;
+}
+
+if (!(Test-Path $exeFilePath -PathType Leaf)) {
+    throw "Failed to download drasi CLI binary - $exeFilePath"
+}
+
+# Remove old drasi CLI if exists
+if (Test-Path $DrasiCliFilePath -PathType Leaf) {
+    Remove-Item -Recurse -Force $DrasiCliFilePath
+}
+
+# Rename the downloaded drasi CLI binary
+Rename-Item -Path $exeFilePath -NewName $DrasiCliFilePath -Force
+
+if (!(Test-Path $DrasiCliFilePath -PathType Leaf)) {
+  throw "Failed to download drasi CLI binary - $exeFilePath"
+}
+
+# Version string
+Write-Output "drasi CLI version: $($release.tag_name)"
+
+
+$UserPathEnvironmentVar = (Get-Item -Path HKCU:\Environment).GetValue(
+    'PATH', # the registry-value name
+    $null, # the default value to return if no such value exists.
+    'DoNotExpandEnvironmentNames' # the option that suppresses expansion
+)
+
+if (-Not ($UserPathEnvironmentVar -like '*drasi*')) {
+    Write-Output "Adding $DrasiRoot to User Path..."
+    # [Environment]::SetEnvironmentVariable sets the value kind as REG_SZ, use the function below to set a value of kind REG_EXPAND_SZ
+    Set-ItemProperty HKCU:\Environment "PATH" "$UserPathEnvironmentVar;$DrasiRoot" -Type ExpandString
+    # Also add the path to the current session
+    $env:PATH += ";$DrasiRoot"
+}
+
+Write-Output "drasi CLI has been successfully installed"