Add future-proof version checking to bash script. Fix a couple of text errors with Powershell script.

build_win2008.ps1

@@ -2,7 +2,7 @@ $ErrorActionPreference = "Stop"
 $packerMinVersion = "0.10.0"
 $vagrantMinVersion = "1.8.1"
 $virtualBoxMinVersion = "5.1.0"
-$vagrantreloadMinVersion = "0.0.2"
+$vagrantreloadMinVersion = "0.0.1"
 
 function CompareVersions ($actualVersion, $expectedVersion, $exactMatch = $False) {
     $actualVersion = $actualVersion.split(".")
@@ -57,7 +57,7 @@ If ($(Test-Path "C:\HashiCorp\Vagrant\bin\vagrant.exe") -eq $True) {
 If (CompareVersions -actualVersion $vagrantVersion -expectedVersion $vagrantMinVersion -exactVersion True) {
     Write-Host "Compatible version of Vagrant found."
 } else {
-    Write-Host "Could not find a compatible version of Vagrant at C:\HashiCorp\Vagrant\bin\. Please download and install it from https://www.vagrantup.com/downloads.html."
+    Write-Host "Could not find a compatible version of Vagrant at C:\HashiCorp\Vagrant\bin\. At this time only $vagrantMinVersion is supported. Please download and install it from https://releases.hashicorp.com/vagrant/1.8.1/."
     exit
 }
 

build_win2008.sh

@@ -1,32 +1,79 @@
 #!/bin/bash
 
-if [[ $(VBoxManage -v | cut -d'.' -f1) -ge "5" ]]; then
+min_virtualbox_ver="5.1.0"
+min_vagrant_ver="1.8.1"
+min_vagrantreload_ver="0.0.1"
+min_packer_ver="0.10.0"
+
+function compare_versions {
+    actual_version=$1
+    expected_version=$2
+    exact_match=$3
+
+    echo $actual_version
+    echo $expected_version
+    echo $exact_match
+
+    if $exact_match; then
+        if [ "$actual_version" == "$expected_version" ]; then
+            echo "exact match"
+            return 0
+        else
+            return 1
+        fi
+    fi
+
+    IFS='.' read -ra actual_version <<< "$actual_version"
+    IFS='.' read -ra expected_version <<< "$expected_version"
+
+    echo ${expected_version[0]}
+    for ((i=0; i < ${#expected_version[@]}; i++))
+    do
+        if [[ ${actual_version[$i]} -gt ${expected_version[$i]} ]]; then
+            echo "was bigger"
+            return 0
+        fi
+
+        if [[ ${actual_version[$i]} -lt ${expected_version[$i]} ]]; then
+            echo "was smaller"
+            return 1
+        fi
+    done
+    return 0
+}
+
+if compare_versions $(VBoxManage -v | cut -d'r' -f1) $min_virtualbox_ver false; then
     echo "Compatible version of VirtualBox found."
 else
     echo "A compatible version of VirtualBox was not found. Please download and install it from here: https://www.virtualbox.org/wiki/Downloads"
     exit 1
 fi
 
-if packer -v | grep -q '0.10.0'; then
+if compare_versions $(packer -v) $min_packer_ver false; then
     echo 'Compatible version of packer was found.'
 else
     echo "A compatible version of packer was not found. Please install from here: https://www.packer.io/downloads.html"
     exit 1
 fi
 
-if vagrant -v | grep -q '1.8.1'; then
+if compare_versions $(vagrant -v | cut -d' ' -f2) $min_vagrant_ver true; then
     echo 'Correct version of vagrant was found.'
 else
-    echo "A compatible version of vagrant was not found. At this time only 1.8.1 is supported. Please install from here: https://releases.hashicorp.com/vagrant/1.8.1/"
+    echo "A compatible version of vagrant was not found. At this time only $min_vagrant_ver is supported. Please install from here: https://releases.hashicorp.com/vagrant/1.8.1/"
     exit 1
 fi
 
-if vagrant plugin list | grep -q 'vagrant-reload (0.0.1)'; then
+if compare_versions $(vagrant plugin list | grep 'vagrant-reload' | cut -d' ' -f2 | tr -d '(' | tr -d ')') $min_vagrantreload_ver false; then
     echo 'Compatible version of vagrant-reload plugin was found.'
 else
     echo "A compatible version of vagrant-reload plugin was not found."
     echo "Attempting to install..."
-    vagrant plugin install vagrant-reload
+    if vagrant plugin install vagrant-reload; then
+        echo "Successfully installed the vagrant-reload plugin."
+    else
+        echo "There was an error installing the vagrant-reload plugin. Please see the above output for more information."
+        exit 1
+    fi
 fi
 
 echo "All requirements found. Proceeding..."
@@ -35,7 +82,12 @@ if ls | grep -q 'windows_2008_r2_virtualbox.box'; then
     echo "It looks like the vagrant box already exists. Skipping the Packer build."
 else
     echo "Building the Vagrant box..."
-    packer build windows_2008_r2.json
+    if packer build windows_2008_r2.json; then
+        echo "Box successfully built by Packer."
+    else
+        echo "Error building the Vagrant box using Packer. Please check the output above for any error messages."
+        exit 1
+    fi
 fi
 
 echo "Attempting to add the box to Vagrant..."
@@ -43,8 +95,13 @@ echo "Attempting to add the box to Vagrant..."
 if vagrant box list | grep -q 'metasploitable3'; then
     echo 'metasploitable3 already found in Vagrant box repository. Skipping the addition to Vagrant.'
 else
-    vagrant box add windows_2008_r2_virtualbox.box --name metasploitable3
-    echo "Box successfully added to Vagrant."
+    if vagrant box add windows_2008_r2_virtualbox.box --name metasploitable3; then
+        echo "Box successfully added to Vagrant."
+    else
+        echo "Error adding box to Vagrant. See the above output for any error messages."
+        exit 1
+    fi
 fi
 
 echo "SUCCESS: Run 'vagrant up' to provision and start metasploitable3."
+echo "NOTE: The VM will need Internet access to provision properly."