Set-PacmanMirror.ps1

# vim: set fileencoding=utf-8 ff=unix expandtab ts=4 sw=4 ft=powershell :
function SetPacmanMirror {
    ### https://qiita.com/yumetodo/items/94a80ca9d6171e9352a2#%E7%B5%90%E8%AB%96
    $PacmanDir = 'C:\tools\ruby25\msys64\etc\pacman.d'
    $Collection = @('mirrorlist.mingw32', 'mirrorlist.mingw64', 'mirrorlist.msys')
    foreach ($Item in $Collection) {
        $Src = Join-Path $PacmanDir $Item
        if (Test-Path "$Src") {
            #$Src = Get-ChildItem "${Src}*".ToString()
            $Dst = "${Src}.orig"
            Copy-Item "$Src" "$Dst"
            if ($Item -eq 'mirrorlist.mingw32') {
                $RepoPath = 'MINGW/i686'
            }
            elseif ($Item -eq 'mirrorlist.mingw64') {
                $RepoPath = 'MINGW/x86_64'
            }
            elseif ($Item -eq 'mirrorlist.msys') {
                $RepoPath = 'MSYS2/$arch'
            }
            (Get-Content "$Src") | ForEach-Object { $_ -creplace "## Primary", "## Primary`nServer = https://jaist.dl.sourceforge.net/project/msys2/REPOS/${RepoPath}/`n" } | Set-Content "$Src"
        }
    }
}

SetPacmanMirror