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List unused layers in a Unity project that uses text serialization
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| ag --nobreak --nofilename --nogroup '\Wm_Layer: \d+$' | | |
| sed -E 's/[ \t]*m_Layer: ([0-9]+)/\1/g' | | |
| python3 -c 'import sys; \ | |
| used_layers = frozenset(map(int, sys.stdin.readlines())); \ | |
| free_layers = sorted([layer for layer in (frozenset(range(32)) - used_layers) if layer > 7]); \ | |
| print("Free layers:", ", ".join(map(str, free_layers)))' |
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