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// Copyright (c) 2019, Sylabs Inc. All rights reserved.
// This software is licensed under a 3-clause BSD license. Please consult the LICENSE.md file
// distributed with the sources of this project regarding your rights to use or distribute this
// software.
package client
import (
"context"
"net/http"
"github.com/blang/semver/v4"
jsonresp "github.com/sylabs/json-resp"
)
const (
// APIVersionV2Upload supports extended image upload functionality.
APIVersionV2Upload = "2.0.0-alpha.1"
// APIVersionV2ArchTags supports extended arch tags functionality.
APIVersionV2ArchTags = "2.0.0-alpha.2"
)
// VersionInfo contains version information.
type VersionInfo struct {
Version string `json:"version"`
APIVersion string `json:"apiVersion"`
}
// GetVersion gets version information from the Cloud-Library Service. The context controls the lifetime of
// the request.
func (c *Client) GetVersion(ctx context.Context) (vi VersionInfo, err error) {
req, err := c.newRequest(ctx, http.MethodGet, "version", "", nil)
if err != nil {
return VersionInfo{}, err
}
res, err := c.HTTPClient.Do(req)
if err != nil {
return VersionInfo{}, err
}
defer res.Body.Close()
if err := jsonresp.ReadResponse(res.Body, &vi); err != nil {
return VersionInfo{}, err
}
return vi, nil
}
// apiAtLeast returns true if cloud-library server supports requested (or greater) API version
func (c *Client) apiAtLeast(ctx context.Context, reqVersion string) bool {
// query cloud-library server for supported api version
vi, err := c.GetVersion(ctx)
if err != nil || vi.APIVersion == "" {
// unable to get cloud-library server API version, fallback to lowest
// common denominator
c.Logger.Logf("Unable to determine remote API version: %v", err)
return false
}
v, err := semver.Make(vi.APIVersion)
if err != nil {
c.Logger.Logf("Unable to decode remote API version: %v", err)
return false
}
minRequiredVers, err := semver.Make(reqVersion)
if err != nil {
c.Logger.Logf("Unable to decode minimum required version: %v", err)
return false
}
return v.GTE(minRequiredVers)
}
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