#cli #uuid

app ruuid

Cli tool to generate UUIDs

6 releases

0.1.6 Mar 1, 2023
0.1.5 Mar 1, 2023

#712 in Command line utilities

Custom license

135 lines


I couldn't find a tool that generates uuid's of various formats conveniently and programatically over the cli and rUUID was born. Necessity is the mother of "I can't find it, I'll make it".

This crate only depends on uuid and clap crates.


Since for uuid version 6, 7 and 8 the uuid crate needs to be compiled with RUSTFLAGS="--cfg uuid_unstable". For you, this means when you install ruuid, you need to pass that unless you want compilation errors. For example:

RUSTFLAGS="--cfg uuid_unstable" cargo install ruuid


RUSTFLAGS="--cfg uuid_unstable" cargo install --git https://github.com/westernwontons/ruuid


There are subcommands for each type of supported uuid's. Any uuid formats supported by uuid are supported by rUUID as well.

For example, to generate a UUID_V1:

ruuid v1

To generate a version 1 UUID with the braced format:

ruuid v1 -b

You can pass a number to tell ruuid how many UUIDs you want generated:

ruuid v1 3

The default number of UUIDs generated is 1.

The following UUIDs are supported:

  • version 1
  • version 3
  • version 4
  • version 5
  • version 6
  • version 7
  • version 8

Version 1, 3, 5, 6 and 8 need some random bytes to be generated, namely 6 pieces of u8 (except for version 8 which needs 16 u8s). These are generated with the help of the rand crate. Honestly I have no ideas whether is sufficient, if it's not, let me know.

Version 3 and 5 implicitly use the DNS namespace. I don't know whether it would be preferable to have that configurable. It's static for know. If you'd like that changed, let me know.


~48K SLoC