running bash script in cygwin on windows 7 [duplicate] - bash

Question

This question already has answers here:
Are shell scripts sensitive to encoding and line endings?
(14 answers)
Closed 3 years ago.
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.