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@felipou

felipou/retry.sh

Last active Mar 15, 2021
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Retry command
#!/bin/bash
#
# Created by Felipe Machado - 2016/02/14
#
# A retry command for bash
# Retries the given command up to MAX_RETRIES, with an interval of SLEEP_TIME
# between each retry. Just put it on your bash_profile and be happy :)
# Usage:
# retry [-s SLEEP_TIME] [-m MAX_RETRIES] COMMAND_WITH_ARGUMENTS
#
# Codes used as reference:
# - http://stackoverflow.com/questions/192249/how-do-i-parse-command-line-arguments-in-bash
# - https://gist.github.com/iangreenleaf/279849
#
# Retry command
function retry() {
SLEEP_TIME="30"
MAX_RETRIES="10"
# Command-line arguments parsing
while [[ $# > 0 ]]
do
key="$1"
case $key in
-s|--sleep)
SLEEP_TIME="$2"
shift # past argument
;;
-m|--max)
MAX_RETRIES="$2"
shift # past argument
;;
-h|--help)
echo """A retry command for bash.
Usage:
retry [-s SLEEP_TIME] [-m MAX_RETRIES] COMMAND_WITH_ARGUMENTS"""
return 0
;;
*)
break # unknown option
;;
esac
shift # past argument or value
done
# The command is all remaining arguments
COMMAND=`printf "%q " "$@"`
if [ "$(echo $COMMAND)" == "''" ]
then
echo "No command given"
return 2
fi
echo $COMMAND
i=0
# I'm using eval to allow for pipes. This could become an option
eval $COMMAND
while [ $? -ne 0 -a $i -lt $MAX_RETRIES ]
do
echo "Command failed - retrying in $SLEEP_TIME..."
sleep $SLEEP_TIME
i=$(($i+1))
eval $COMMAND
done
if [ $i -eq $MAX_RETRIES ]
then
echo "Max retries reached"
return 1
fi
}
retry "$@"
@allan-avatar1

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@allan-avatar1 allan-avatar1 commented Jun 7, 2017

i recommend adding a return 1 to line 63. that way retry.sh can be used in if conditionals in bash. the default is return 0, but if it reaches max retries then return 1 and the if conditional will fail. up to you

@onny

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@onny onny commented Mar 11, 2021

I added #!/usr/bin/bash to the first line.
Packaged it on the AUR: https://aur.archlinux.org/packages/retry-git/
A help command would be cool

@felipou

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@felipou felipou commented Mar 15, 2021

@allan-avatar1: Thanks for the suggestion, I'll do that - better late than never :)

@onny: Good point, I'll add a shebang and a help command, thanks!

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