Regression : Upgrade failed because not enought free space in /var

[HugoPoi]

Describe the bug

1. we need to keep public/system
2. we change the code to use --keep but It does a copy behind the hood

mastodon_ynh/scripts/upgrade

Line 101 in c3c4416

ynh_setup_source --dest_dir="$install_dir/live" --keep="public/system/"

before

https://github.com/YunoHost-Apps/mastodon_ynh/blame/17d9f373c9c8d2d443e561bfd39f8a9690e8ff43/scripts/upgrade#L169-L187

Steps to reproduce

/var free space is smaller than the size of public/system

Workaround

Move public/system before upgrading

[madmaxlamenace]

Hello,
I've got the same issue.

Even if i added 40GB of more disk space the result is the same and all the space is used 196GB
The last line is this one.
Info : [########++..........] > Upgrading source files...

hopefully for me i always use virtualisation and always make snapshots before upgrades.

[HugoPoi]

probably worth to fix it in the core so every app can benefit from this