Worked pretty well in production systems, serving huge amount of RPS (like ~5-10k/s) running on a LAMP stack monolith in five different geographical regions.

Just git branch (one branch per region because of compliance requirements) -> branch creates "tar.gz" with predefined name -> automated system downloads the new "tar.gz", checks release date, revision, etc. -> new symlink & php (serverles!!!) graceful restart and ka-b00m.

Rollbacks worked by pointing back to the old dir & restart.

Worked like a charm :-)

And for Stow[1] before it, and for its inspiration Depot[2] before even that. It’s an old idea.

[1] https://www.gnu.org/software/stow/

[2] http://ftp.gregor.com/download/dgregor/depot.pdf