To parse python files in ROS project and see how many publishers and subscribers.

parse.sh

#!/bin/bash

IFS='
'
DIR=ros_catkin_ws/src/
SUB=0
PUB=0
SVC=0
SVP=0
ACC=0
ACS=0

shopt -s nocasematch

regex="([0-9a-z/_]+)/([0-9a-z_]+\.py):([0-9]+)"
reg2="\.(Subscriber|Publisher|ServiceProxy|Service|ActionClient|ActionServer)\(([^,]*), *([^)]*)"
                                                             
lines=$(grep '\.\(Subscriber(\|Publisher(\|ServiceProxy(\|Service(\|ActionClient(\|ActionServer(\)' -nr $DIR --include='*.py' -I)

for line in $lines; do
        echo $line
        [[ $line =~ $regex ]]
        echo "${BASH_REMATCH[1]}"
        echo "${BASH_REMATCH[2]}"
        echo "${BASH_REMATCH[3]}"
        [[ $line =~ $reg2 ]]
        echo "${BASH_REMATCH[1]}"
        echo "${BASH_REMATCH[2]}"
        echo "${BASH_REMATCH[3]}"
        if [[ x"${BASH_REMATCH[1]}" == xSubscriber ]]; then 
                let SUB=SUB+1
        fi
        if [[ x"${BASH_REMATCH[1]}" == xPublisher ]]; then
                let PUB=PUB+1
        fi
        if [[ x"${BASH_REMATCH[1]}" == xServiceProxy ]]; then 
                let SVP=SVP+1
        fi
        if [[ x"${BASH_REMATCH[1]}" == xService ]]; then 
                let SVC=SVC+1
        fi
        if [[ x"${BASH_REMATCH[1]}" == xActionClient ]]; then 
                let ACC=ACC+1
        fi
        if [[ x"${BASH_REMATCH[1]}" == xActionServer ]]; then
                let ACS=ACS+1
        fi
done

echo -----
echo Publisher: $PUB
echo Subscriber: $SUB
echo Service: $SVC
echo ServiceProxy: $SVP
echo ActionClient: $ACC
echo ActionServer: $ACS