gitcaddy-runner/internal/pkg/envcheck/disk_windows.go

//go:build windows

// Copyright 2026 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT

package envcheck

import (
	"path/filepath"

	"golang.org/x/sys/windows"
)

// detectDiskSpace detects disk space on the specified path's drive (Windows version)
// If path is empty, defaults to "C:\"
func detectDiskSpace(path string) *DiskInfo {
	if path == "" {
		path = "C:\\"
	}

	// Resolve to absolute path
	absPath, err := filepath.Abs(path)
	if err != nil {
		absPath = "C:\\"
	}

	// Extract drive letter (e.g., "D:\" from "D:\builds\runner")
	drivePath := filepath.VolumeName(absPath) + "\\"
	if drivePath == "\\" {
		drivePath = "C:\\"
	}

	var freeBytesAvailable, totalNumberOfBytes, totalNumberOfFreeBytes uint64

	pathPtr := windows.StringToUTF16Ptr(drivePath)
	err = windows.GetDiskFreeSpaceEx(pathPtr, &freeBytesAvailable, &totalNumberOfBytes, &totalNumberOfFreeBytes)
	if err != nil {
		// Fallback to C: drive
		pathPtr = windows.StringToUTF16Ptr("C:\\")
		err = windows.GetDiskFreeSpaceEx(pathPtr, &freeBytesAvailable, &totalNumberOfBytes, &totalNumberOfFreeBytes)
		if err != nil {
			return nil
		}
		drivePath = "C:\\"
	}

	used := totalNumberOfBytes - totalNumberOfFreeBytes
	usedPercent := float64(used) / float64(totalNumberOfBytes) * 100

	return &DiskInfo{
		Path:        drivePath,
		Total:       totalNumberOfBytes,
		Free:        totalNumberOfFreeBytes,
		Used:        used,
		UsedPercent: usedPercent,
	}
}