create cscope index for go project

cscope-go.sh

#!/bin/bash

# generate cscope index files in current directory
# the generated cscope index files also include go standard packages

if [ $GOROOT = "" ]
then
echo "GOROOT is not set"
    exit 1
fi

go_pkg_src=$GOROOT/src/pkg

find $go_pkg_src -name "*.go" -print > cscope.files
find . -name "*.go" -print >> cscope.files

if cscope -b -k; then
echo "Done"
else
echo "Failed"
    exit 1
fi