cmd/stupgrades: Generate appropriate upgrade data (fixes #5924) (#5960)

This is a tiny tool to grab the GitHub releases info and generate a
more concise version of it. The conciseness comes from two aspects:

- We select only the latest stable and pre. There is no need to offer
  upgrades to versions that are older than the latest. (There might be, in
  the future, when we hit 2.0. We can revisit this at that time.)

- We use our structs to deserialize and reserialize the data. This means
  we remove all attributes that we don't understand and hence don't
  require.

All in all the new response is about 10% the size of the previous one and
avoids the issue where we only serve a bunch of release candidates and
no stable.
This commit is contained in:
Jakob Borg 2019-08-16 10:04:10 +02:00 committed by GitHub
parent 77a5980747
commit 96350d7600
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57
cmd/stupgrades/main.go Normal file
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// Copyright (C) 2019 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.
package main
import (
"encoding/json"
"flag"
"os"
"sort"
"github.com/syncthing/syncthing/lib/upgrade"
)
const defaultURL = "https://api.github.com/repos/syncthing/syncthing/releases?per_page=25"
func main() {
url := flag.String("u", defaultURL, "GitHub releases url")
flag.Parse()
rels := upgrade.FetchLatestReleases(*url, "")
if rels == nil {
// An error was already logged
os.Exit(1)
}
sort.Sort(upgrade.SortByRelease(rels))
rels = filterForLatest(rels)
if err := json.NewEncoder(os.Stdout).Encode(rels); err != nil {
os.Exit(1)
}
}
// filterForLatest returns the latest stable and prerelease only. If the
// stable version is newer (comes first in the list) there is no need to go
// looking for a prerelease at all.
func filterForLatest(rels []upgrade.Release) []upgrade.Release {
var filtered []upgrade.Release
var havePre bool
for _, rel := range rels {
if !rel.Prerelease {
// We found a stable version, we're good now.
filtered = append(filtered, rel)
break
}
if rel.Prerelease && !havePre {
// We remember the first prerelease we find.
filtered = append(filtered, rel)
havePre = true
}
}
return filtered
}