Bash script working locally but returning syntax error in CI

Question

On my gitlab CI I am running the following simple script (.gitlab-ci.yml):

STR=$(cat $FILE)
if grep -q "substring" <<< "$STR"; then echo "ok"; fi

Unfortunatley this gives me the error

/bin/sh: eval: line 100: syntax error: unexpected redirection

Running the same command locally as a script is working as expected:

#!/bin/sh

FILE="./file.txt"
STR=$(cat $FILE)

if grep -q "substring" <<< "$STR"; then
    echo "ok"
fi

The file has the content:

This has a substring somewhere

KamilCuk · Accepted Answer · 2020-09-14 15:56:26Z

1

/bin/sh is not bash and <<< is a bash extension not available on every shell. Install bash, change shebang to /bin/bash and make sure the script is run under bash or use posix compatible syntax printf "%s\n" "$str" | grep...

Note: UPPER CASE VARIABLES are by convention reserved for exported variables, like IFS COLUMNS PWD UID EUID LINES etc. Use lower case variables in your scripts.

answered Sep 14, 2020 at 15:56

KamilCuk

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2 Comments

user3142695 Over a year ago

Im running this in a alpine image. I think there is no bash but sh. How can I check for substring in sh?

KamilCuk Over a year ago

or use posix compatible syntax printf "%s\n" "$str" | grep... stackoverflow.com/questions/2829613/… I meant if printf "%s\n" "$str" | grep -q somehthing; then.

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