Method versionMismatch

pkg/client/client.go:865–908

versionMismatch returns true if the server was built before 2018-01-13 and the client was built at or after 2018-01-13.

(ctx context.Context)

// versionMismatch returns true if the server was built before 2018-01-13 and
// the client was built at or after 2018-01-13.
func (c *Client) versionMismatch(ctx context.Context) (bool, error) {
	const shortRFC3339 = "2006-01-02"
	version := buildinfo.GitInfo
	if version == "" {
		return false, errors.New("unknown client version")
	}
	version = version[:10] // keep only the date part
	clientDate, err := time.Parse(shortRFC3339, version)
	if err != nil {
		return false, fmt.Errorf("could not parse date from version %q: %v", version, err)
	}
	apiChangeDate, _ := time.Parse(shortRFC3339, "2018-01-13")
	if !clientDate.After(apiChangeDate) {
		// client is old enough, all good.
		return false, nil
	}
	url := c.discoRoot() + "/status/status.json"
	req := c.newRequest(ctx, "GET", url)
	res, err := c.doReqGated(req)
	if err != nil {
		return false, err
	}
	if res.StatusCode != 200 {
		body, _ := io.ReadAll(io.LimitReader(res.Body, 1<<20))
		res.Body.Close()
		return false, fmt.Errorf("got status code %d from URL %s; body %s", res.StatusCode, url, body)
	}
	var status struct {
		Version string `json:"version"`
	}
	if err := httputil.DecodeJSON(res, &status); err != nil {
		return false, fmt.Errorf("error parsing JSON from URL %s: %v", url, err)
	}
	serverVersion := status.Version[:10]
	serverDate, err := time.Parse(shortRFC3339, serverVersion)
	if err != nil {
		return false, fmt.Errorf("could not parse date from server version %q: %v", status.Version, err)
	}
	if serverDate.After(apiChangeDate) {
		// server is recent enough, all good.
		return false, nil
	}
	return true, nil
}

// FileHasContents returns true iff f refers to a "file" or "bytes" schema blob,
// the server is configured with a "download helper", and the server responds