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docopt
docopt.rs
Rust2014–2024
docopt / docopt.rs · Archived

docopt.rs

Docopt for Rust (command line argument parser).

Command LineLanguages & Compilers
Explore on GitHubRead Hacker News discussions
9Distinct people
12Mentions
1Explicit recommenders
747GitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

Docopt for Rust (command line argument parser).

GitHub

Where it is used

No documented product use has been verified yet.

What people are saying

I love docopt and I love rust. This thing written at [the docopt rust repo.] worries me > the wider docopt project is mostly unmaintained at this point. Consider using clap or…

jbaber used a recommendation phrase. One indexed comment matches. This is a phrase match, not a verdict.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

Also in these discussions

No other repository is repeatedly linked in the same discussions.

This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 7:56:55 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by year12 dated mentions

Observed mentions: 2014-07-07 21:54:53 UTC to 2024-08-08 07:30:31 UTC.

012342014-01-01 00:00:00 UTC to 2015-01-01 00:00:00 UTC (exclusive): 4 mentions; 1 submissions, 3 comments20142015-01-01 00:00:00 UTC to 2016-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2016-01-01 00:00:00 UTC to 2017-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2017-01-01 00:00:00 UTC to 2018-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2018-01-01 00:00:00 UTC to 2019-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2019-01-01 00:00:00 UTC to 2020-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments20192020-01-01 00:00:00 UTC to 2021-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2021-01-01 00:00:00 UTC to 2022-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2022-01-01 00:00:00 UTC to 2023-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2023-01-01 00:00:00 UTC to 2024-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2024-01-01 00:00:00 UTC to 2025-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2024

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges
UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
PeriodStart (UTC)End (exclusive, UTC)MentionsSubmissionsComments
20142014-01-01 00:00:00 UTC2015-01-01 00:00:00 UTC413
20152015-01-01 00:00:00 UTC2016-01-01 00:00:00 UTC101
20162016-01-01 00:00:00 UTC2017-01-01 00:00:00 UTC000
20172017-01-01 00:00:00 UTC2018-01-01 00:00:00 UTC101
20182018-01-01 00:00:00 UTC2019-01-01 00:00:00 UTC101
20192019-01-01 00:00:00 UTC2020-01-01 00:00:00 UTC101
20202020-01-01 00:00:00 UTC2021-01-01 00:00:00 UTC000
20212021-01-01 00:00:00 UTC2022-01-01 00:00:00 UTC101
20222022-01-01 00:00:00 UTC2023-01-01 00:00:00 UTC101
20232023-01-01 00:00:00 UTC2024-01-01 00:00:00 UTC101
20242024-01-01 00:00:00 UTC2025-01-01 00:00:00 UTC101

What Hacker News says

4 sources
burntsushi·Nov 7, 2014
> A good (trivial) example was a great command parsing library just doesn’t exist yet. There is a Docopt implementation in Rust[1], which is used by Cargo. It tracks master and is regularly updated. Interestingly, I've found people either love or hate Docopt, so maybe you knew about it but don't like it. :P /shameless plug [1] - https://github.com/docopt/docopt.rs
In Rust and Go
dbaupp·Jul 16, 2014
Comparing a constant: string.as_slice() == "foo" "Parsing" command line args (it's not as slick as it could be, but it's not entirely horrible... for me as an experienced Rust user anyway): match std::os::args().as_slice() { [] => println!("need more arguments"), [ref x, ..] if x.as_slice() == "-h" => print_help(), [ref a, ref b] if a.as_slice() == "-f" => write_to_file(b.as_slice()) args @ _ => println!("unrecognised arguments: {}", args) } Of course, using a proper parser like getopts or docopt.rs would be better: - http://doc.rust-lang.org/master/getopts/ - https://github.com/BurntSushi/docopt.rs I think it gets smoother with practice (as in, with practice you're able to know intuitively when you need .as_slice and when a `ref` is required etc.), but yes, improving the ergonomics will be nice. Dynamicall
Read the rest
y sized types will allow for String to be treated implicitly as a &str in many cases, so, e.g., my_string.trim() will work (it currently requires `my_string.as_slice().trim()`). And there is some loose talk about overloading pattern matching via the same mechanism, which would allow proper pattern matching on String with literals `"..."`. > support generic pattern matching. There's some subtlety here, e.g. Haskell doesn't support pattern matching on Data.Vector.Vector or Data.Text.Text (which are some of the closest equivalents to &[T], Vec<T> and String).
In State of Rust 0.11.0

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