func HomeDir()

in pulsaradmin/pkg/utils/home_dir.go [36:97]
47 lines of code
16 McCabe index (conditional complexity)

func HomeDir() string {
	if runtime.GOOS == "windows" {
		home := os.Getenv("HOME")
		homeDriveHomePath := ""
		if homeDrive, homePath := os.Getenv("HOMEDRIVE"), os.Getenv("HOMEPATH"); len(homeDrive) > 0 && len(homePath) > 0 {
			homeDriveHomePath = homeDrive + homePath
		}
		userProfile := os.Getenv("USERPROFILE")

		// Return first of %HOME%, %HOMEDRIVE%/%HOMEPATH%, %USERPROFILE% that contains a `.pulsar\config` file.
		// %HOMEDRIVE%/%HOMEPATH% is preferred over %USERPROFILE% for backwards-compatibility.
		for _, p := range []string{home, homeDriveHomePath, userProfile} {
			if len(p) == 0 {
				continue
			}
			if _, err := os.Stat(filepath.Join(p, ".pulsar", "config")); err != nil {
				continue
			}
			return p
		}

		firstSetPath := ""
		firstExistingPath := ""

		// Prefer %USERPROFILE% over %HOMEDRIVE%/%HOMEPATH% for compatibility with other auth-writing tools
		for _, p := range []string{home, userProfile, homeDriveHomePath} {
			if len(p) == 0 {
				continue
			}
			if len(firstSetPath) == 0 {
				// remember the first path that is set
				firstSetPath = p
			}
			info, err := os.Stat(p)
			if err != nil {
				continue
			}
			if len(firstExistingPath) == 0 {
				// remember the first path that exists
				firstExistingPath = p
			}
			if info.IsDir() && info.Mode().Perm()&(1<<(uint(7))) != 0 {
				// return first path that is writeable
				return p
			}
		}

		// If none are writeable, return first location that exists
		if len(firstExistingPath) > 0 {
			return firstExistingPath
		}

		// If none exist, return first location that is set
		if len(firstSetPath) > 0 {
			return firstSetPath
		}

		// We've got nothing
		return ""
	}
	return os.Getenv("HOME")
}