nixos/hledger: initial web/api services

[disassembler]

Motivation for this change

adds web/api services for hledger

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option build-use-sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Fits CONTRIBUTING.md.

---

[Mic92]

If /var/lib/hledger does not exist, this line will fail.
This requires mkdir -p ${cfg.statePath}, followed by touch and chown of the stateFileName.

[peterhoeg]

Better to use StateDirectory = "hledger"; which will handle the creation and chowing automatically.

[Mic92]

In general I would agree, however for this service it seems that somebody might prefer to read the file from their own home.

[Mic92]

Since this service only needs a single file, we don't need fixed uids for it. Please use remove them here so dynamic ids will be allocated when the service is enabled.

[peterhoeg]

Ah yes, this clearly doesn't make sense to run as a system-wide service. The systemd services should be under systemd.user.services instead and could be a "hledger-web@.service" user services which takes a path as a parameter.

[disassembler]

@peterhoeg why wouldn't you want this to run as a system-wide service? I run this on my server that I'm never logged into with an nginx proxy and a systemd user service would only start when logged in.

[ryantm]

This has a probably trivial merge conflict that needs to be resolved.

[mmahut]

Are there any updates on this pull request, please?

[stale]

Thank you for your contributions.
This has been automatically marked as stale because it has had no activity for 180 days.
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[DamienCassou]

I'm closing because no one raised any interest for months.