♾️ loop

Run a command in loop, nothing else.

``` USAGE: loop [OPTIONS] ...

ARGS: ... Command to execute

OPTIONS: -d, --delay Delay between iteration in milliseconds -h, --help Print help information -i, --iter Number of iteration --no-stat Do not display statistics at the end of execution --while-ko Loop while exit code is failure --while-ok Loop while exit code is success ```

Installation

$ cargo install loop-bin

Samples

```bash $ loop --iter 4 --delay 1000 date Tue Aug 9 06:59:58 CEST 2022 Tue Aug 9 06:59:59 CEST 2022 Tue Aug 9 07:00:00 CEST 2022 Tue Aug 9 07:00:01 CEST 2022

date total: 4 ok: 4 ko: 0 ```

At the end of execution (or if ctrl+c interrupts the loop), a summary of the number of success and failure is outputted. This summary can be deactivated with --no-stat option.

loop can easily be used with time:

• Generate random_time: bash $ dd if=/dev/urandom of=/dev/null bs=1 count=1024 status=none
• Loop for 1000 iteration generating random data: bash $ loop --iter 1000 --no-stat dd if=/dev/urandom of=/dev/null bs=1 count=1024 status=none
• How much time is needed: bash $ time loop --iter 1000 --no-stat dd if=/dev/urandom of=/dev/null bs=1 count=1024 status=none loop --iter 1000 --no-stat dd if=/dev/urandom of=/dev/null bs=1 count=1024 0.60s user 1.05s system 95% cpu 1.723 total

Another example with hurl to perform tests on HTTP endpoints:

bash $ loop --while-ok hurl test.hurl ... hurl total: 140 ok: 139 ko: 1