# UTF-8 first-parent log for HSchool.Server. Keep in sync with embed-changelog.sh.
param(
    [Parameter(Mandatory = $true)]
    [string] $RepoRoot,
    [Parameter(Mandatory = $true)]
    [string] $Output
)

$ErrorActionPreference = "Stop"

$dir = Split-Path -Parent $Output
if (-not (Test-Path -LiteralPath $dir)) {
    New-Item -ItemType Directory -Path $dir | Out-Null
}

$sha = ""
$log = ""
Push-Location -LiteralPath $RepoRoot
try {
    $sha = (git rev-parse HEAD 2>$null | Out-String).Trim()
    if ($LASTEXITCODE -ne 0 -or $sha.Length -ne 40) {
        $sha = ""
    }
    elseif ($sha.Length -eq 40) {
        $log = git -c core.quotepath=false log --first-parent --encoding=UTF-8 --pretty=format:%H%x1f%cI%x1f%s
        if ($LASTEXITCODE -ne 0) {
            $log = ""
        }
    }
}
finally {
    Pop-Location
}

$text = $sha + "`n"
if (-not [string]::IsNullOrEmpty($log)) {
    $text += $log.TrimEnd() + "`n"
}

[System.IO.File]::WriteAllText($Output, $text, [System.Text.UTF8Encoding]::new($false))