Automate building zlib on Windows with mingw/mingw-w64

build_zlib.ps1

#requires -version 2.0

# Author: Jon Maken
# License: 3-clause BSD
# Revision: 2013-03-11 01:39:59 -0600
#
# TODO:
#   - extract generics into a downloadable utils helper module
#   - add proper try-catch-finally error handling
#   - support x86 and x64 builds

param(
  [parameter(Mandatory=$true,
             Position=0,
             HelpMessage='zlib version to build (eg - 1.2.7)')]
  [alias('v')]
  [validateset('1.2.7')]
  [string] $version,

  [parameter(HelpMessage='Path to 7-Zip command line tool')]
  [string] $7ZA = 'C:/tools/7za.exe',

  [parameter(HelpMessage='Path to DevKit root directory')]
  [string] $DEVKIT = 'C:/Devkit'
)

$msg_color = 'Yellow'

$root = Split-Path -parent $script:MyInvocation.MyCommand.Path
$libname = 'zlib'
$source = "${libname}-${version}.tar.gz"
$source_dir = "${libname}-${version}"
$repo_root = 'http://zlib.net/'
$archive = "${repo_root}${source}"
$hash_uri = "https://raw.github.com/jonforums/poshlab/master/hashery/${libname}.md5"

# download and verify
# TODO implement progress bar when extracted to util helper module
if(-not (Test-Path $source)) {
  Import-Module BitsTransfer
  Write-Host "[INFO] downloading $archive" -foregroundcolor $msg_color
  Start-BitsTransfer $archive "$PWD\$source"
}

# download hash data and validate downloaded source archive
Write-Host "[INFO] validating $source" -foregroundcolor $msg_color
$client = New-Object System.Net.WebClient
$hash = ConvertFrom-StringData $client.DownloadString($hash_uri)

try {
  $hasher = New-Object System.Security.Cryptography.MD5Cng
  $fs = New-Object System.IO.FileStream "$PWD\$source", 'Open', 'Read'
  $test_hash = [BitConverter]::ToString($hasher.ComputeHash($fs)).Replace('-','').ToLower()
} finally {
  $fs.Close()
}

if ($test_hash -ne $hash[$version].ToLower()) {
  Write-Host "[ERROR] $source validation failed, exiting" -foregroundcolor red
  break
}


# extract
Write-Host "[INFO] extracting $source" -foregroundcolor $msg_color
$tar_file = "$($source.Substring(0, $source.LastIndexOf('-')))*.tar"
(& "$7ZA" "x" $source) -and (& "$7ZA" "x" $tar_file) -and (rm $tar_file) | Out-Null


# patch, configure, build, archive
Push-Location "${source_dir}"

  # activate toolchain
  Write-Host "[INFO] activating toolchain" -foregroundcolor $msg_color
  . "$DEVKIT/devkitvars.ps1" | Out-Null

  # configure
  Write-Host "[INFO] configuring ${source_dir}" -foregroundcolor $msg_color
  $install_dir = "$($PWD.ToString().Replace('\','/'))/my_install"

  # build
  Write-Host "[INFO] building ${source_dir}" -foregroundcolor $msg_color
  sh -c "make -f win32/Makefile.gcc" | Out-Null

  # install
  $install_opts = @("BINARY_PATH=${install_dir}/bin",
                    "INCLUDE_PATH=${install_dir}/include",
                    "LIBRARY_PATH=${install_dir}/lib",
                    "SHARED_MODE=1")
  sh -c "make install -f win32/Makefile.gcc $(${install_opts} -join ' ')" | Out-Null

  # archive
  Push-Location "$install_dir"
    Write-Host "[INFO] creating binary archive for ${source_dir}" -foregroundcolor $msg_color
    $bin_archive = "${source_dir}-x86-windows-bin.7z"
    & "$7ZA" "a" "-mx=9" "-r" $bin_archive "*" | Out-Null
  Pop-Location

Pop-Location

# hoist binary archive and cleanup
Write-Host "[INFO] cleaning up" -foregroundcolor $msg_color
mv "$install_dir\$bin_archive" "$PWD"
rm -recurse -force "${source_dir}"