TL;DR Drop in the jar ➜ it checks Jenkins and updates ViaVersion / ViaBackwards / ViaRewind (and ViaRewind‑Legacy on Spigot) on a schedule. Snapshots optional, DEV and Java8 jobs supported.

• Highlights
• What It Updates
• Platforms & Requirements
• Installation
• Quick Start
• Configuration
  • Spigot/Bungee (config.yml)
  • Velocity (config.toml)
  • Scheduling Cheat Sheet
• Commands & Permissions
• How It Works
• Troubleshooting & FAQ
• Building from Source
• Changelog Highlights

• Automatic updates for the Via ecosystem from Jenkins.
• Snapshot handling you control: newest overall vs newest non‑snapshot.
• DEV and Java 8 job support per plugin.
• Simple interval or UNIX cron scheduling, plus a boot delay.
• Safe restarts: optional broadcast and delayed shutdown.

• ViaVersion
• ViaBackwards
• ViaRewind
• ViaRewind Legacy Support (Spigot only)

• Platforms: Spigot, Paper, Folia; Velocity; BungeeCord
• Minecraft: 1.8 → Latest
• Java: 8+

1. Download the latest release from Spigot.
2. Place the jar in your server’s plugins/ folder (on proxies, use the proxy’s plugins/).
3. Start the server to generate config files and versions.yml.
4. Adjust settings and restart.

• Run /updatevias to check immediately.
• Leave snapshot: true to always take the newest build; set false to take the newest non‑snapshot.
• Flip dev or java8 on a per‑plugin basis as needed.

Config files live here:

• Spigot/Bungee: plugins/AutoViaUpdater/config.yml
• Velocity: plugins/AutoViaUpdater/config.toml

ViaVersion:
  enabled: true
  snapshot: true   # newest overall; false = newest non-snapshot
  dev: false       # use Jenkins -DEV job
  java8: false     # use Jenkins -Java8 job

ViaBackwards:
  enabled: true
  snapshot: true
  dev: false
  java8: false

ViaRewind:
  enabled: true
  snapshot: true
  dev: false
  java8: false

ViaRewind-Legacy:
  enabled: true    # Spigot only
  snapshot: true
  dev: false       # DEV path uses "...%20Support%20DEV" under ViaRewind view

# Scheduling
Check-Interval: 60        # minutes; used when cron is blank
Cron-Expression: ""       # UNIX cron (5 fields); overrides interval when set
Delay: 5                  # seconds after boot before first check

# Optional safe restart after successful update
AutoRestart: false
AutoRestart-Delay: 60
AutoRestart-Message: '&cServer is restarting in 1 minute!'

Check-Interval = 60
Cron-Expression = ""
Delay = 5

AutoRestart = false
AutoRestart-Delay = 60
AutoRestart-Message = '&cServer is restarting in 1 minute!'

[ViaVersion]
enabled = true
snapshot = true
dev = false
java8 = false

[ViaBackwards]
enabled = true
snapshot = true
dev = false
java8 = false

[ViaRewind]
enabled = true
snapshot = true
dev = false
java8 = false

# ViaRewind-Legacy is Spigot-only; Velocity ignores it

• Every 2 hours: 0 */2 * * *
• Every day at 05:00: 0 5 * * *
• Every 15 minutes: */15 * * * *

If the cron is blank, the plugin uses Check-Interval (minutes) with an initial Delay (seconds).

• /updatevias - triggers an immediate check
• Permission: autoviaupdater.admin (required on Velocity/Bungee; OP on Spigot by default)

• The plugin calls the Jenkins API for each selected job.
• Selection:
  • Snapshot ON → newest build overall (regardless of "-SNAPSHOT").
  • Snapshot OFF → newest non‑snapshot build.
  • DEV/Java8 flags pick the -DEV / -Java8 jobs when available.
• Download:
  • New jar goes to plugins/. If a matching jar exists, it is staged to plugins/update/ for a clean swap on restart.
• Tracking:
  • Last installed build numbers are saved in plugins/AutoViaUpdater/versions.yml.

Jenkins shortcuts

• ViaVersion DEV: https://ci.viaversion.com/job/ViaVersion-DEV/
• ViaBackwards DEV: https://ci.viaversion.com/view/ViaBackwards/job/ViaBackwards-DEV/
• ViaRewind DEV: https://ci.viaversion.com/view/ViaRewind/job/ViaRewind-DEV/
• ViaRewind Legacy Support DEV: https://ci.viaversion.com/view/ViaRewind/job/ViaRewind%20Legacy%20Support%20DEV/

• Nothing updated - Make sure the target Via plugin is installed (the updater replaces what exists).
• Wrong channel - Check snapshot/dev/java8 flags for the specific plugin.
• Downloaded but not applied - Enable AutoRestart or restart manually. If plugins/update exists, jars move on restart.
• Build not found - Jenkins may be down or the job moved. Try /updatevias again or verify the job URL.

mvn -DskipTests package

Grab the shaded jar from target/.

• Folia‑safe scheduling and strict Bukkit access on Spigot.
• Clear snapshot selection rules (newest overall vs non‑snapshot only).
• Correct DEV job for ViaVersion and ViaRewind Legacy Support.
• Human‑friendly filename for ViaRewind‑Legacy‑Support.
• HTTP timeouts and improved error handling.