################################################################################
##  File:  Validate-Ruby.ps1
##  Desc:  Verify that Ruby is on the path and output version information.
################################################################################

# Function that gets the version of Ruby at the specified path
function Get-RubyVersion
{
    Param
    (
        [String]$rubyRootPath
    )

    # Prepend to the path like: C:\hostedtoolcache\windows\Ruby\2.5.0\x64\bin
    $env:Path = "$rubyRootPath;" + $env:Path

    # Extract the version from Ruby output like: ruby 2.5.1p57 (2018-03-29 revision 63029) [x64-mingw32]
    if( $(ruby --version) -match 'ruby (?<version>.*) \(.*' )
    {
        $rubyVersion = $Matches.version
        return $rubyVersion
    }

    Write-Host "Unable to determine Ruby version at " + $rubyRootPath
    exit 1
}

# Verify that ruby is on the path
if(Get-Command -Name 'ruby')
{
    Write-Host "$(ruby --version) is on the path."
}
else
{
    Write-Host "Ruby is not on the path."
    exit 1
}

# Default Ruby Version on Path
$rubyExeOnPath = (Get-Command -Name 'ruby').Path
$rubyBinOnPath = Split-Path -Path $rubyExeOnPath
$rubyVersionOnPath = Get-RubyVersion -rubyRootPath $rubyBinOnPath

# Add details of available versions in Markdown
$SoftwareName = "Ruby (x64)"
$Description = @"
#### $rubyVersionOnPath
_Environment:_
* Location: $rubyBinOnPath
* PATH: contains the location of ruby.exe version $rubyVersionOnPath
"@

Add-SoftwareDetailsToMarkdown -SoftwareName $SoftwareName -DescriptionMarkdown $Description