(chocolatey#3174) Store non-normalized package version

In a previous change we normalized all versions that was being used
in Chocolatey CLI. This caused certain packages that uses non-normalized
version numbers to start failing to look up additional information in other
products.

To work around this problem we need to store the non-normalized version
of the package when scripts are being ran. This is done by adding a new
environment variable that can be used, this environment variable is considered
private and is not for public consumption.

src/chocolatey/infrastructure.app/services/PowershellService.cs

@@ -446,6 +446,10 @@ public void PreparePowerShellEnvironment(IPackageSearchMetadata package, Chocola
             Environment.SetEnvironmentVariable("packageTitle", package.Title);
             Environment.SetEnvironmentVariable("chocolateyPackageVersion", package.Identity.Version.ToNormalizedStringChecked());
             Environment.SetEnvironmentVariable("packageVersion", package.Identity.Version.ToNormalizedStringChecked());
+            // We use ToStringSafe on purpose here. There is a need for the version
+            // the package specified, not the normalized version we want users to use.
+            Environment.SetEnvironmentVariable("chocolateyPackageVersionOriginal", package.Identity.Version.ToStringSafe());
+            Environment.SetEnvironmentVariable("packageVersionOriginal", package.Identity.Version.ToStringSafe());
             Environment.SetEnvironmentVariable("chocolateyPackageVersionPrerelease", package.Identity.Version.Release.ToStringSafe());
 
             Environment.SetEnvironmentVariable("chocolateyPackageFolder", packageDirectory);

src/chocolatey/infrastructure.app/templates/ChocolateyReadMeTemplate.cs

@@ -84,7 +84,7 @@ Chocolatey makes a number of environment variables available (You can access any
  * ChocolateyInstall - Top level folder where Chocolatey is installed
  * ChocolateyPackageName - The name of the package, equivalent to the `<id />` field in the nuspec
  * ChocolateyPackageTitle - The title of the package, equivalent to the `<title />` field in the nuspec
- * ChocolateyPackageVersion - The version of the package, equivalent to the `<version />` field in the nuspec
+ * ChocolateyPackageVersion - The normalized version of the package, equivalent to a normalized edition of the `<version />` field in the nuspec
  * ChocolateyPackageFolder - The top level location of the package folder  - the folder where Chocolatey has downloaded and extracted the NuGet package, typically `C:\ProgramData\chocolatey\lib\packageName`.
 
 #### Advanced Environment Variables

tests/chocolatey-tests/commands/choco-install.Tests.ps1

@@ -1863,6 +1863,39 @@ To install a local, or remote file, you may use:
         }
     }
 
+    # Tagged as Internal as this package needs to be packaged by an older version of Chocolatey CLI to have the nuspec version
+    # not be normalized.
+    Context 'Installing non-normalized package outputting all environment variables' -Tag Internal {
+        BeforeAll {
+            Restore-ChocolateyInstallSnapshot
+
+            $Output = Invoke-Choco install test-environment --version 0.9 --confirm
+        }
+
+        It 'Exits with Success (0)' {
+            $Output.ExitCode | Should -Be 0 -Because $Output.String
+        }
+
+        It 'Outputs <Name> as <Value>' -ForEach @(@{
+            Name = 'chocolateyPackageVersion'
+            Value= '0.9.0'
+        }
+        @{
+            Name = 'packageVersion'
+            Value= '0.9.0'
+        }
+        @{
+            Name = 'chocolateyPackageVersionOriginal'
+            Value= '0.9'
+        }
+        @{
+            Name = 'packageVersionOriginal'
+            Value= '0.9'
+        }) {
+            $Output.Lines | Should -Contain "$Name=$Value"
+        }
+    }
+
     # This needs to be the last test in this block, to ensure NuGet configurations aren't being created.
     # Any tests after this block are expected to generate the configuration as they're explicitly using the NuGet CLI
     Test-NuGetPaths