running bash script in cygwin on windows 7 [duplicate]

Question

I am trying to run the below bash script in cygwin on windows 7

REPEATTIMES="$1"

if [ $# = 0 ]; then

    echo "Usage: fetch topN repeatTimes"
    exit 1
fi

for (( i=1; i<=$REPEATTIMES; i++ ))
do
    echo "ITERATION: $i"
    echo "GENERATING"

    log=thelogs/log 

    bin/nutch generate crawl/segment -topN 10 > $log
    batchId=`sed -n 's|.*batch id: \(.*\)|\1|p' < $log`

    echo "batch id: $batchId "

    # rename log file by appending the batch id
    log2=$log$batchId
    mv $log $log2
    log=$log2

    echo "FETCHING"
    bin/nutch fetch crawl/segments/$batchId >> $log

    echo "PARSING"
    bin/nutch parse crawl/segments/$batchId >> $log


    echo "UPDATING DB"
    bin/nutch updatedb crawl/crawldb crawl/segments/$batchId >> $log

    echo "Done "

done

---

But when i run it i get the error :

line 11 :syntax error near unexpected token '$'\r'

line 11 :'for (( i=1; i<= REPEATTIMES; i++ ))

The script works fine on a ubuntu server. But i need to run it now on a windows machine.

Answer 1

If you can't fix all your scripts, you should be able to modify the EOL behavior in Cygwin by setting an option to ignore CRs:

set -o igncr

If you add this to your .bash_profile, it will be globally set by default when you login:

export SHELLOPTS
set -o igncr

You can also do this per script internally by putting this line just after the #! line:

(set -o igncr) 2>/dev/null && set -o igncr; # this comment is required

You need the comment to ignore the CR in that line which is read before the option takes effect.

Answer 2

The latest version of Cygwin seems to only support files in Unix format (i.e. with \n for newlines as opposed to the DOS/Windows \r\n newline).

To fix this, run the /bin/dos2unix.exe utility, giving your script as the argument to the command:

e.g. /bin/dos2unix.exe myScript.sh

This will convert it to Unix format and you then should be able to run it.