download

type FileOptions struct {
	// Options is the common set of downloader options.
	Options
	// Mkdirs is the option to create parent directories of target directory if they don't
	// exist. Use `download.MkdirAll` or `download.MkdirNone` (or any `*bool`). Defaults to
	// `download.MkdirAll`.
	Mkdirs Mkdirs
}

type Mkdirs *bool

type Options struct {
	// HTTPClient is an optional client to perform downloads with. If nil, `http.DefaultClient`
	// will be used.
	HTTPClient *http.Client
	// Checksum is either a checksum string, or a URL or path to a file containing the checksum. The file
	// can either contain the checksum only or contain multiple lines of the format:
	// CHECKSUM FILENAME
	Checksum string
	// Checksum hash is the hash for the checksum. Currently only supports SHA1, SHA256, SHA512 and MD5.
	// If unspecified, defaults to SHA256.
	ChecksumHash crypto.Hash
	// ProgressBars is the configuration of progress bars output. Set to `nil` (default) to disable.
	ProgressBars *ProgressBarOptions
	// Retries is the number of retries for retriable errors. Defaults to 5 if unset. Set to -1 for
	// infinite retries.
	Retries int
	// RetryInterval is the interval between retries.
	RetryInterval time.Duration
}

type ProgressBarOptions struct {
	// Writer holds where to output the progress bars to. Defaults to `os.Stdout`.
	Writer io.Writer
	// Width is the maximum width of the progress bar. If output to a narrower terminal then this
	// will be ignored.
	MaxWidth int
}