tronbyt-server 2.0.0 handle existing config files

[IngmarStein]

Quick follow up on
#259630: only create the .env file if it doesn't exist to avoid this error on upgrades:

Error: An exception occurred within a child process:
  RuntimeError: Will not overwrite /opt/homebrew/var/tronbyt-server/.env

• Have you followed the guidelines for contributing?
• Have you ensured that your commits follow the commit style guide?
• Have you checked that there aren't other open pull requests for the same formula update/change?
• Have you built your formula locally with HOMEBREW_NO_INSTALL_FROM_API=1 brew install --build-from-source <formula>, where <formula> is the name of the formula you're submitting?
• Is your test running fine brew test <formula>, where <formula> is the name of the formula you're submitting?
• Does your build pass brew audit --strict <formula> (after doing HOMEBREW_NO_INSTALL_FROM_API=1 brew install --build-from-source <formula>)? If this is a new formula, does it pass brew audit --new <formula>?

---

[botantony]

This wont work as install block is used to build bottles. Such logic should be in post_install block

And I'm not sure if this check is needed at all:

$ brew install tronbyt-server
...
$ cat /opt/homebrew/var/tronbyt-server/.env
# Add application configuration here.
# For example:
# LOG_LEVEL=INFO

$ echo "# Foo bar baz" >> /opt/homebrew/var/tronbyt-server/.env
$ cat /opt/homebrew/var/tronbyt-server/.env
# Add application configuration here.
# For example:
# LOG_LEVEL=INFO
# Foo bar baz

$ brew reinstall tronbyt-server
...
$ cat /opt/homebrew/var/tronbyt-server/.env
# Add application configuration here.
# For example:
# LOG_LEVEL=INFO
# Foo bar baz

[IngmarStein]

Ah, I was testing with --head:

❯ brew install --head tronbyt-server
==> Fetching downloads for: tronbyt-server
✔︎ API Source tronbyt-server.rb                                                                                                                                             [Verified      2.7KB/  2.7KB]
✔︎ Formula tronbyt-server (HEAD-63fa65a)
==> go build -ldflags=-s -w -X tronbyt-server/internal/version.Version=HEAD-63fa65a -X tronbyt-server/internal/version.Commit=63fa65a -X tronbyt-server/internal/version.BuildDate=2025-12-22T13:08:47Z
Error: An exception occurred within a child process:
  RuntimeError: Will not overwrite /opt/homebrew/var/tronbyt-server/.env

[IngmarStein]

Moving the part to post_install helped:

❯ HOMEBREW_NO_INSTALL_FROM_API=1 brew reinstall tronbyt-server
==> Fetching downloads for: tronbyt-server
✔︎ Formula tronbyt-server (HEAD-63fa65a)
==> Reinstalling tronbyt-server
==> go build -ldflags=-s -w -X tronbyt-server/internal/version.Version=HEAD-63fa65a -X tronbyt-server/internal/version.Commit=63fa65a -X tronbyt-server/internal/version.BuildDate=2025-12-22T13:08:47Z
==> Caveats
Application configuration should be placed in:
  /opt/homebrew/var/tronbyt-server/.env

To start tronbyt-server now and restart at login:
  brew services start tronbyt-server
Or, if you don't want/need a background service you can just run:
  /opt/homebrew/opt/tronbyt-server/bin/tronbyt-server
==> Summary
🍺  /opt/homebrew/Cellar/tronbyt-server/HEAD-63fa65a: 9 files, 43.9MB, built in 4 seconds
==> Running `brew cleanup tronbyt-server`...
❯ cat /opt/homebrew/var/tronbyt-server/.env
# Add application configuration here.
# For example:
LOG_LEVEL=DEBUG