Support setting a path for the .jjconfig.toml file through the JJ_CONFIG env var

[poliorcetics]

Description

jujutsu default config file location is ~/.jjconfig.toml.

This location is configurable via the JJ_CONFIG env var.

It would be nice for programs.jujutsu to support it. Some other programs already allow overriding their config file path that way.

Thanks!

[SrEstegosaurio]

Also, shouldn't it be placed by default under $XDG_CONFIG_HOME?

Related:
martinvonz/jj#84

[poliorcetics]

Ah, martinvonz/jj#85 uses dirs, its choices are often questioned on macOS (see dirs-dev/directories-rs#47 for the longest discussion) :/ that's sad. Still, it will work on Linux at the very least

[stale]

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[SrEstegosaurio]

Still relevant to me.