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Using travis_retry inside shell scripts together with set -e
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README.md

If you want to use travis_retry from within your own shell script files then you first have to make the travis_retry shell function available by sourcing the travis_retry.sh file, otherwise you just get a "command not found" error. See example.sh for a full example.

Note that the original function as found in the travis-ci/travis-build repository was slightly modified to allow it to be used in a shell context where set -e is enabled.

For reference, a tweet by Travis CI saying that you should copy the travis_retry code as I've done here: https://twitter.com/plexus/status/499194992632811520

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example.sh
#!/bin/bash
# fail script immediately on any errors in external commands
set -e
source travis_retry.sh
travis_retry pip install numpy
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travis_retry.sh
# https://github.com/travis-ci/travis-build/blob/master/lib/travis/build/templates/header.sh
travis_retry() {
local result=0
local count=1
while [ $count -le 3 ]; do
[ $result -ne 0 ] && {
echo -e "\n${ANSI_RED}The command \"$@\" failed. Retrying, $count of 3.${ANSI_RESET}\n" >&2
}
# ! { } ignores set -e, see https://stackoverflow.com/a/4073372
! { "$@"; result=$?; }
[ $result -eq 0 ] && break
count=$(($count + 1))
sleep 1
done
[ $count -gt 3 ] && {
echo -e "\n${ANSI_RED}The command \"$@\" failed 3 times.${ANSI_RESET}\n" >&2
}
return $result
}
@tianon
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tianon commented Jun 12, 2018

FYI, this was fixed in travis-ci/travis-build#1162! ❤️

@azbarcea
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This seems very valuable if your build runs inside a docker container, and one needs to push the travis_retry.bash (also changed the location in the meanwhile and the original template file name) inside the docker image (Dockerfile).

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