refactor: remove 7zip dependency (#37)

Replaced 7ZipforPowerShell dependency with windows tar.exe and reduced
number of files being extracted to only the ones we require

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Author: feardamhan

VMware.CloudFoundation.InstanceRecovery.psm1

@@ -266,11 +266,13 @@ Function Confirm-VCFInstanceRecoveryPreReqs {
 
     #Check Dependencies
     $jumpboxName = hostname
-    $is7Zip4PowerShellInstalled = Get-InstalledModule -name "7Zip4PowerShell" -RequiredVersion "2.4.0" -ErrorAction SilentlyContinue
-    If (!$is7Zip4PowerShellInstalled) {
-        LogMessage -type WARNING -message "[$jumpboxName] 7Zip4PowerShell Module Missing. Please install"
+
+    #Check for windows tar.exe
+    $isTarInstalled = Test-Path "C:\Windows\System32\tar.exe"
+    If (!$isTarInstalled) {
+        LogMessage -type WARNING -message "[$jumpboxName] tar.exe Missing. Please install"
     } else {
-        LogMessage -type INFO -message "[$jumpboxName] 7Zip4PowerShell Module found"
+        LogMessage -type INFO -message "[$jumpboxName] tar.exe found"
     }
 
     $isPoshSSHInstalled = Get-InstalledModule -name "Posh-SSH" -RequiredVersion "3.0.8" -ErrorAction SilentlyContinue
@@ -373,10 +375,11 @@ Function New-ExtractDataFromSDDCBackup {
     $command = "openssl enc -d -aes-256-cbc -md sha256 -in $backupFileFullPath -pass pass:`"$encryptionPassword`" -out `"$parentFolder\decrypted-sddc-manager-backup.tar.gz`""
     Invoke-Expression "& $command" *>$null
 
-    #Extract Backup
+    #Extract Required Files From Backup Leveraging Windows tar.exe
     LogMessage -type INFO -message "[$jumpboxName] Extracting Backup"
-    Expand-7Zip -ArchiveFileName "$parentFolder\decrypted-sddc-manager-backup.tar.gz" -TargetPath $parentFolder
-    Expand-7Zip -ArchiveFileName "$parentFolder\decrypted-sddc-manager-backup.tar" -TargetPath $parentFolder
+    Set-Location "$parentFolder"
+    tar -xzf "$parentFolder\decrypted-sddc-manager-backup.tar.gz" "$extractedBackupFolder/metadata.json" "$extractedBackupFolder/appliancemanager_dns_configuration.json" "$extractedBackupFolder/appliancemanager_ntp_configuration.json" "$extractedBackupFolder/security_password_vault.json" "$extractedBackupFolder/database/sddc-postgres.bkp"
+
 
     #Get Content of Password Vault
     LogMessage -type INFO -message "[$jumpboxName] Reading Password Vault"

docs/index.md

@@ -37,7 +37,6 @@ Dependency                                           | Version   | Publisher
 -----------------------------------------------------|-----------|---------------------------|---------------------------------------------------------------------------
 [VMware.PowerCLI][psgallery-module-powercli]         | 13.3.0    | Broadcom                  | :fontawesome-solid-book:   [Documentation][developer-module-powercli]
 [Posh-SSH][psgallery-module-poshssh]                 | 3.0.8     | Carlos Perez              | :fontawesome-brands-github:   [GitHUb][github-module-poshssh]
-[7Zip4Powershell][psgallery-module-7zip4powershell]  | 2.4.0     | Thomas Freudenberg        | :fontawesome-brands-github:   [GitHub][github-module-7zip4powershell]
 [OpenSSL for Windows][download-win64openssl]         | 3.2.1     | Shining Light Productions | :octicons-package-dependencies-24:   [Download][download-win64openssl]
 
 [microsoft-powershell]: https://docs.microsoft.com/en-us/powershell