feat(formatting): Add shfmt

[RasmusRendal]

Upstreamed from another Famedly repository, so you know these formatter options are popular.

[cursor]

PR Summary

Low Risk
Developer tooling only; no runtime, auth, or data-path changes beyond auto-formatting shell files on commit.

Overview
Adds shfmt to the shared treefmt setup so shell scripts are formatted alongside Nix and Rust.

nix/general/formatting.nix enables programs.shfmt with tab indentation (indent_size = 0) and wires the formatter into treefmt; the generated treefmt.toml runs shfmt on *.sh, *.bash, *.envrc, and *.envrc.* with -w -i 0 -s.

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[tlater-famedly]

Yes.

[cursor]

Cursor Bugbot has reviewed your changes using high effort and found 1 potential issue.

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[cursor]

Missing simplify in Nix config

Medium Severity

Issue: treefmt.toml enables shfmt -s, but programs.shfmt only sets indent_size and never enables simplify (or equivalent settings.formatter.shfmt.options). Since treefmt.toml is generated from Nix via filegen, the next apply will drop -s or fail the prek filegen check.

Fix: Enable simplify in the Nix source of truth (e.g. programs.shfmt.simplify = true, or append "-s" the same way nixfmt sets "--strict"), then regenerate treefmt.toml.

Additional Locations (1)

• treefmt.toml#L32-L37

 

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