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I'm making a 1.12 map that need to do something when a player join. I tried stats.leavegame method, but if the game crashed the last time, the command won't run.

No file permission for it's hard to share, but unintended file type (like using a file to take the place of a folder, in my answer) is fine

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    Yay, someone who shows what they tried before! – Fabian Röling May 9 '18 at 8:59
  • So you want to detect every join, not just the first, right? There are certainly ways to detect when the player is there or not, but I'm trying to find a not very laggy, elegant way. I have some ideas already, I'll try some things in the next hours, for example if scoreboard tag on offline players can be used here. – Fabian Röling May 9 '18 at 9:04
  • @Fabian Using tag seems can only detect players except the first one – l4m2 May 9 '18 at 11:39
  • @Virusbomb Checked the dup source, it assumes on a server, so if it crashes a local fix can be done; Here is a map where you shouldn't require to do something just because of unnormal shutdown – l4m2 Aug 13 '19 at 16:39
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Self solved , experiment under discussion with chyx

The world loads before player join even if it's single player, so freely assume at the beginning there's no player:

give @a[score_onLine=0] iron_shovel
scoreboard players set * onLine 0
scoreboard players set @a onLine 1
| improve this answer | |
  • Someone has requested in a suggested edit that you add scoreboard players add @a onLine 0 at the start, because, This won't register players joining for the first time.. I rejected this edit because it changes the post's meaning. Although it can seem like a good addition, so you may want to consider adding it. – ExpertCoder14 Jul 7 at 0:37

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