get-srt-version.ps1

#-----------------------------------------------------------------------------
#
#  SRT library build procedures for Windows
#  Copyright (c) 2020, Thierry Lelegard
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#-----------------------------------------------------------------------------

<#
 .SYNOPSIS

  Get the version string of the SRT library.

 .PARAMETER BareVersion

  Use the "bare version" number from libsrt (in file version.h). This is the
  most recent official version number. Since there are likely some commits
  in the libsrt repository since the last commit, this may not be the most
  appropriate version number. By default, use a detailed version number
  (most recent version, number of commits since then, short commit SHA).

 .PARAMETER Windows

  Return a "version info" string for Windows executable.
#>
[CmdletBinding()]
param(
    [switch]$BareVersion = $false,
    [switch]$Windows = $false
)

if ($BareVersion) {
    # Identify from latest version.
    $VersionFile = "$PSScriptRoot\external\srt.build.x64\version.h"
    $Major = ((Get-Content $VersionFile | Select-String -Pattern "#define SRT_VERSION_MAJOR ").ToString() -replace "#define SRT_VERSION_MAJOR *","")
    $Minor = ((Get-Content $VersionFile | Select-String -Pattern "#define SRT_VERSION_MINOR ").ToString() -replace "#define SRT_VERSION_MINOR *","")
    $Patch = ((Get-Content $VersionFile | Select-String -Pattern "#define SRT_VERSION_PATCH ").ToString() -replace "#define SRT_VERSION_PATCH *","")
    $Version = "${Major}.${Minor}.${Patch}"
    $VersionInfo = "${Major}.${Minor}.${Patch}.0"
}
else {
    Push-Location "$PSScriptRoot\external\srt"
    $Version = (git describe --tags ) -replace '^v','' -replace '-g','-'
    Pop-Location
    # Split version string in pieces and make sure it has at least four elements.
    $VField = ($Version -split "[-\. ]") + @("0", "0", "0", "0") | Select-String -Pattern '^\d*$'
    $VersionInfo = "$($VField[0]).$($VField[1]).$($VField[2]).$($VField[3])"
}

if ($Windows) {
    Write-Output $VersionInfo
}
else {
    Write-Output $Version
}