Modify rc file instead of overwritting

[dmlemos]

My cmus configuration is kept on the rc file (as recommended from cmus team).

The problem is the file gets overwritten upon every install. I think it should be modified instead.

[PhilipTrauner]

I'm not entirely sure that I fully understand the issue here. The newly introduced temporary file based approach doesn't wipe the contents of your rc file.
It just replaces the file itself with a temporary file that was previously populated with the contents of your current rc, while appending the cmus_osx specific entry.
Additionally, if the cmus_osx entry is already present, no replacement is taking place.

I implemented it this way, because I deemed atomically replacing the current file to be a better / cleaner approach than reading the contents of a users rc file into a buffer, conditionally appending the cmus_osx specific entry to said buffer, and overriding the rc file with the contents of said buffer.

[dmlemos]

I think I didn't state the problem clear enough.

My config is symlinked to my dotfiles repository.
Since it uses a temporary file, it basically replaces rc instead of modifying it, which is frustrating.

Additionally, if the cmus_osx entry is already present, no replacement is taking place.

In this case it doesn't do that, and in fact replaces the file every time as mentioned above.

[PhilipTrauner]

That would mean, that resolving the symlink would fix this, right?

[dmlemos]

Yep. I believe so.

[PhilipTrauner]

Let's get dmlemos#1 in first, as it already bumps the version and then I'll tackle this.