retry/README.md

retryit - The command line retry tool

Retry any shell command with exponential backoff or constant delay.

Instructions

Install:

gem install retryit

Usage

Help:

retry -?

Usage: retry [options] [-f fail_script +commands] -e execute command
    -h, -?, --help
    -f                               Execute fail script after all retries are exhausted
    -t, --tries=#                    Set max retries: Default 10
    -s, --sleep=secs                 Constant sleep amount (seconds)
    -m, --min=secs                   Exponenetial Backoff: minimum sleep amount (seconds): Default 0.3
    -x, --max=secs                   Exponenetial Backoff: maximum sleep amount (seconds): Default 60

Examples

No problem:

retry echo u work good

u work good

Test functionality:

retry 'echo "y u no work"; false'

y u no work
Before retry #1: sleeping 0.3 seconds
y u no work
Before retry #2: sleeping 0.6 seconds
y u no work
Before retry #3: sleeping 1.2 seconds
y u no work
Before retry #4: sleeping 2.4 seconds
y u no work
Before retry #5: sleeping 4.8 seconds
y u no work
Before retry #6: sleeping 9.6 seconds
y u no work
Before retry #7: sleeping 19.2 seconds
y u no work
Before retry #8: sleeping 38.4 seconds
y u no work
Before retry #9: sleeping 60.0 seconds
y u no work
Before retry #10: sleeping 60.0 seconds
y u no work
etc..

Limit retries:

retry -t 4 -e 'echo "y u no work"; false'

y u no work
Before retry #1: sleeping 0.3 seconds
y u no work
Before retry #2: sleeping 0.6 seconds
y u no work
Before retry #3: sleeping 1.2 seconds
y u no work
Before retry #4: sleeping 2.4 seconds
y u no work
Retries exhausted

Bad command:

retry poop

Command Failed: poop

Fail command:

retry -t 3 -f echo "oh poopsickles" -e 'echo "y u no work"; false'

y u no work
Before retry #1: sleeping 0.3 seconds
y u no work
Before retry #2: sleeping 0.6 seconds
y u no work
Before retry #3: sleeping 1.2 seconds
y u no work
Retries exhausted, running fail script
oh poopsickles

License

Apache 2.0 - go nuts