Honest question, as I’m struggling to leave the shell environment once the program gets too large. I could use Perl, but $? and the likes get quickly out of hand. Python’s support for pipes was difficult last time I used it, but that may have changed. What would you recommend?
Sharing this because its the route I went, anything I'd have written in Bash I'd now do in Perl.
Nim is statically typed and (generally) native-compiled, but it has very low ceremony ergonomics and a powerful compile-time macro/template system as well as user-defined operators (e.g., you can use `+-` to make a constructor for uncertain values so that `9 +- 2` builds a typed object as in https://github.com/SciNim/Measuremancer .
My use case is approx. like this: I can get 80% what I want with ls … | sed … | grep -v … but then it gets complicated in the script and I’d like to replace the sed or grep part with some program.
import posix; for line in popen("ls", "r").lines: echo line
in Nim, though you obviously need to replace `echo line` with other desired processing and learn how to do that.You might also want to consider `rp` which is a program generator-compiler-runner along the lines of `awk` but with all the code just Nim snippets interpolated into a program template: https://github.com/c-blake/bu/blob/main/doc/rp.md . E.g.:
$ ls -l | rp -pimport\ stats -bvar\ r:RunningStat -wnf\>4 r.push\ 4.f -eecho\ r
RunningStat(
number of probes: 26
max: 31303.0
min: 23.0
sum: 84738.0
mean: 3259.153846153846
std deviation: 6393.116633069013
)Python to me, is too far away from shell/unix. It is a programming language for writing applications. For the use case of writing shell scripts but in a more powerful language, perl is still the king here (or it should be. Sadly it doesn't appear to be the case. No one is using it except for die hard gray beards.)
Raku is a modern (still a big) language with kitchen sink. Again doesn't appear to be much uptake.
Even allows to add dependencies and if necessary compile the script on the fly.
Just the inclusion of argparse alone is worth it IMO.
> Python’s support for pipes was difficult
Well, the idea would be to replace a lot of your pipe usage.
Off the wall, but Scala has a concise syntax for process operations, but startup time is likely prohibitive.