Regex is triggering an 'Unextpected token' in my bash script , but it looks good as best I can tell. What am I doing wrong?

Question

I have the following in my bash script:

if [ $YEAR_MONTH =~ ^[0-9]{4}-(0[1-9]|1[0-2])$]
        then
                        echo "ERROR: Incorrct folder name format, should be <YYYY-mm>"
                        echo ""
                        print_instructions
                        exit 1
 fi

The regex is good as best as I can tell, but bash throws this error when I try run it:

myuser@myserver:/opt/myfolder$ ./fetch_logs_from_azure.sh list
./fetch_logs_from_azure.sh: line 51: syntax error near unexpected token `('
./fetch_logs_from_azure.sh: line 51: `                if [ $YEAR_MONTH =~ ^[0-9]{4}-(0[1-9]|1[0-2])$]'

I thought I might need to escape the '-' but that didn't make a difference.
What am I doing wrong?

See http://mywiki.wooledge.org/BashFAQ/031 for further information. — oguz ismail, Dec 18 '20 at 09:27

score 1 · Accepted Answer · answered Dec 18 '20 at 08:49

1

[ ... ] does not support =~. Use [[ ... ]] instead.

[STEP 101] $ [ $PWD =~ ^[0-9]{4}-(0[1-9]|1[0-2])$ ]
bash: syntax error near unexpected token `('
[STEP 102] $ [[ $PWD =~ ^[0-9]{4}-(0[1-9]|1[0-2])$ ]]
[STEP 103] $

answered Dec 18 '20 at 08:49

pynexj

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Regex is triggering an 'Unextpected token' in my bash script , but it looks good as best I can tell. What am I doing wrong?

1 Answers1