high-tide: init at 0.1.0

[TotalTaxAmount]

closes: #369825

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 25.05 Release Notes (or backporting 24.11 and 25.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

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[griffi-gh]

Everything else seems okay but...

Should we be overriding this? (i assume most DEs would set it automatically?)

But even then, as per XDG specs XDG_CACHE should probably point to a directory in ~/.cache and not /tmp?

[griffi-gh]

This would also lead to the client re-downloading the images on every boot if /tmp is mounted on top of tmpfs

[TotalTaxAmount]

XDG_CACHE_HOME wasn't set for me on Hyprland, I could move it to .cache though I wasn't sure if $HOME/.cache is the correct "nix" way to do that or if there is a nix way to get the user home dir

[griffi-gh]

yea it's not set for me either.. hmm
i think that /tmp is okay as well, but $HOME/.cache is probably preferable over that

[TotalTaxAmount]

with

gappsWrapperArgs+=(
      # XDG_CACHE_HOME needs to be set, or high-tide will save images to its working dir.
      --prefix XDG_CACHE_HOME : "$HOME/.cache"
    )

High tide crashes with:

./HighTide           
Fontconfig error: No writable cache directories
Fontconfig error: No writable cache directories
Traceback (most recent call last):
  File "/nix/store/2afapcyiwmmxp13281n58xhvq8rrxnzb-high-tide-0.1.0/bin/.HighTide-wrapped", line 46, in <module>
    sys.exit(main.main(VERSION))
             ^^^^^^^^^^^^^^^^^^
  File "/nix/store/2afapcyiwmmxp13281n58xhvq8rrxnzb-high-tide-0.1.0/share/HighTide/high_tide/main.py", line 140, in main
    app = TidalApplication()
          ^^^^^^^^^^^^^^^^^^
  File "/nix/store/2afapcyiwmmxp13281n58xhvq8rrxnzb-high-tide-0.1.0/share/HighTide/high_tide/main.py", line 47, in __init__
    variables.init()
  File "/nix/store/2afapcyiwmmxp13281n58xhvq8rrxnzb-high-tide-0.1.0/share/HighTide/high_tide/lib/variables.py", line 28, in init
    os.makedirs(IMG_DIR)
  File "<frozen os>", line 215, in makedirs
  File "<frozen os>", line 215, in makedirs
  File "<frozen os>", line 225, in makedirs
PermissionError: [Errno 13] Permission denied: '/homeless-shelter'

Running strings HighTide it appears that nix is changing $HOME to /homeless-shelter:

/homeless-shelter/.cache
XDG_CACHE_HOME

This might have been the reason I made it cache in /tmp before and I just forgot. Not sure if there is a different way to do this.