pip install and add package name and version to requirements.txt

add-requirement

#!/usr/bin/env bash

if [ -z "$1" ]
then
    echo "No argument supplied. Usage: add-requirement Django"
fi

FILE="requirements.txt"

if [ -f $FILE ]; then
   echo "Add requirement $1 to $FILE"
else
   echo "File $FILE does not exist."
   exit 1
fi

pip install $1
RESULT=$(pip freeze | grep $1)

echo $RESULT

if [[ $RESULT == $1==* ]]
then
    RESULT2=$(cat $FILE | grep $1)
    if [[ $RESULT2 == $1==* ]]
    then
        echo "Already added $1 to $FILE"
    else
        echo $RESULT >> $FILE
        echo "Added $RESULT to $FILE"
    fi
else
   echo "Can't add $1 to $FILE. pip package name is not equals to $1";
fi