Implement seq

[GrayJack]

This is a tracking issue for the seq util.

Required options and flags:

• f (long: format)
• s (long: separator)
• t (long: terminator)
• w (long: equal-width, visible-alias: fixed-width)

Notes:
¹ : Long name not defined on other implementation of this utility. Implementer must choose a long name.
² : Short name (one letter) not defined on other implementation of this utility. Implementer must choose. a short name

References

Seq Linux
Seq FreeBSD
Seq NetBSD
Seq DragonflyBSD

Unresolved questions:

None yet

History

The -w and -s were implemented by #125
Open issue for -f: #127

[FrancisMurillo]

Hi, planning to work on this issue. Planning to do the following:

1. Create a branch, cli/seq from master
2. Create a seq member based on sleep
3. Replicate man seq in terms of options and documentation
4. Write code

Any other advice or guidelines such as testing as well?

[GrayJack]

Yes one advice

Always drop manually everything that needs to when std::process::exit()

As for testing, I do not have something more strict because we have lots of stuff that the result depends on the running system configuration, and I have no idea how to create tests for these cases.

But overall, everything that are not those cases, I would like tests cases. I usually give very descriptive names for test functions like <function name>_<case>

Example:
I have a function called myfunc that takes one bool parameter, so my test function names would be myfunc_true and myfunc_false

I guess that's all that I can think on top of my head

Have fun with the project 😄

[yehohanan7]

Hi @GrayJack, not sure if @FrancisMurillo is working on this. I had few hours to work on this one, please review the PR -#125

[GrayJack]

Just missing -f flag now

[GrayJack]

I just notice that when all 3 args are the same (1 1 1, or 2 2 2) it wont print the value

With default seq

seq 1 1 1

Has output of
1

this version only exit without showing the number

[lynnpepin]

Heya, I'd like to take a crack at adding the -f flag and fixing this behavior so seq 1 1 1 operates as expected!

[lynnpepin]

Hi @GrayJack I couldn't reproduce the 1 1 1 problem from the dev branch.

Running seq 1 1 1 returns 1, as expected, when built using MacOS and Linux targets.

[GrayJack]

Hi @lynnpepin, I believe the error in the behavior was fixed on PR #154 , but the -f flag remains unimplemented

Sorry, I forgot to mention here that the issue was fixed.

[lynnpepin]

Understood! Focusing on the -f flag

[lynnpepin]

Hey @GrayJack I'm going to call it quits on implementing -f. Couldn't figure it out, and I've definitely overcommited a bit! I think I need to tackle some more Rust before trying again.

As it stands, a good first issue for anyone else!