rustshellscript

Joined 7 years ago

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Sep 27

https://github.com/rust-shell-script/rust_cmd_lib

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8 rustshellscript 4 months ago 0 comments

Comment · 3 years ago

You can check https://github.com/rust-shell-script/rust_cmd_lib

Comment · 3 years ago

Here: https://github.com/rust-shell-script/rust_cmd_lib

Comment · 5 years ago

Here is the rust library with the “the only good parts” of bash/shell script: https://github.com/rust-shell-script/rust_cmd_lib

Comment · 5 years ago

The only good part of sh/bash script is to run commands with piping/redirection support IMO，other than that I saw posts like this to explain sh/bash script’s puzzles/pitfalls all the time.

Maybe it is time to consider using rust instead: https://github.com/rust-shell-script/rust_cmd_lib ?

Comment · 5 years ago

zsh is also doing the variable substitution better than bash. FYI, I just released rust_cmd_lib 1.0 recently, which can do variable substitution without any quotes: https://github.com/rust-shell-script/rust_cmd_lib

Comment · 5 years ago

I have developed a similar library before: https://github.com/rust-shell-script/bash_cmd_lib/blob/maste... which can do temp files cleanup, different levels ofreporting and redirecting all error msgs into log file automatically.

Comment · 5 years ago

Thanks Steve. I have studied the "200 lines" book a few days ago, but was still confused. Only after seeing your talks, everything becomes so much clearer. These talks should really be part of the "async book" :)

Futures Explained in 200 Lines of Rust cfsamson.github.io

4 rustshellscript 6 years ago 0 comments

Comment · 6 years ago

I have created a similar library for bash. However, there are more pitfalls related to errexit, see [1] and even shellcheck can not help there. I have tried to solve the pitfalls in my library, but it turned out to be ugly and unreliable. That's why I'm trying to use rust [2] for shell scripting like tasks nowadays.

[1] https://github.com/anordal/shellharden/blob/master/how_to_do...

[2] https://github.com/rust-shell-script/rust_cmd_lib

Comment · 6 years ago

Unquoted argument is not an issue here, see some examples here: https://github.com/rust-shell-script/rust_cmd_lib/issues/10

Comment · 6 years ago

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.

Comment · 6 years ago

It can be supported with internal APIs, even without macros: Cmds::from_cmd(Cmd(...).current_dir(..)) .pipe(Cmd(...).current_dir(...)) .run_cmd(...)

As you can see, it is very verbose and that's why I choose to hide the lower APIs at this moment.

Comment · 6 years ago

Thanks, yes since I just finished the core functionality of this project and I am not surprised if it is still missing some critical features when converting bash script. Pls file bugs if you find anything :)

Comment · 6 years ago

You can consider it was enabled by default, and any failed command would return error unless you mask it with “xx || true”.