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since run_cmd! and run_fun! are returning result type, you can always do let _ = run_cmd!(ls nofile); to ignore single command error.

The “xxx || true” is for ignoring error within a group of commands, which is also very common in sh “set -e” mode. Without it, the group of commands need to be divided into at least 3 parts to still capture all possible command errors. I probably need to document this part with more details.

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This ties in to what I wrote before: I prefer a philosophy where groups of commands are not written in the shell DSL, but are instead native statements (as much as possible), and the user is forced to use native control flow.

Documentation is not going to make me warm up to the idea, because I don't like having the choice to use the DSL so much.

With that in mind, perhaps I'm not the most valid person to provide criticism of this project ;)

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