First tests and fixes for linux

Author: zeroSal

install.sh

@@ -1,50 +1,28 @@
 #!/bin/bash
 
-if [ "$EUID" -ne 0 ]
-  then echo "[x] Root privileges required!"
-  exit
-fi
-
-PROGRAMNAME=""
-DEVELOPERNAME=""
-SHORTPROGRAMNAME=""
-
-echo "Welcome to the $PROGRAMNAME installer
-
-By using this software you must agree all below terms:
-    1) By using this software, it's the end user’s responsibility to obey all applicable local, state and federal laws.
-    2) The software is provided \"as is\", without warranty of any kind, express or implied.
-    3) $DEVELOPERNAME isn't responsible for any damage caused by this software.
-
-[?] If you agree, press [Enter] to procede:"
-read junk
-
-if [ "$(uname)" == "Darwin" ]; then
-  install_python_mac()
-elif [ "$(expr substr $(uname -s) 1 5)" == "Linux" ]; then
-  install_python_linux()
-else
-  echo "[x] Only MacOS and Linux operating system are supported."
-fi
-
 install_python_mac () {
   if ! command -v brew >/dev/null; then
     echo "[x] Brew package manager not installed."
+    exit
   fi
 
-  if ! brew list -1 | grep -q "python@3"; then
+  brew list | grep "python@3.*" > /dev/null 2>&1
+  if [ $? -ne 0 ]; then
     echo "[*] Installing python interpreter on the system..."
     if ! brew install -y "python3" > /dev/null 2>&1; then
       echo "[x] Cannot install python via brew."
+      exit
     fi
+  else
+    echo "[*] The python interpreter is already installed."
   fi
 }
 
 install_python_linux () {
   if command -v apt-get >/dev/null; then
-    install_python_apt()
+    install_python_apt
   elif command -v yum >/dev/null; then
-    install_python_yum()
+    install_python_yum
   else
     echo "[x] Neither apt not yum found as package manager."
     exit
@@ -53,24 +31,54 @@ install_python_linux () {
 
 install_python_apt () {
   if [ $(dpkg-query -W -f='${Status}' python3 > /dev/null 2>&1 | grep -c "ok installed") -eq 0 ]; then
-    # Python3 not installed on the system, just install it!
     echo "[*] Installing python interpreter on the system..."
     apt update > /dev/null 2>&1;
     apt install python3 > /dev/null 2>&1;
   fi
 }
 
-# Install python requirements
+install_python_yum () {
+  if ! yum list installed python3 &>/dev/null; then
+    echo "[*] Installing python interpreter on the system..."
+    yum install -y python3 > /dev/null 2>&1;
+  fi
+}
+
+# if [ "$EUID" -ne 0 ]
+#   then echo "[x] Root privileges required!"
+#   exit
+# fi
+
+PROGRAMNAME=""
+DEVELOPERNAME=""
+SHORTPROGRAMNAME=""
+
+echo "Welcome to the $PROGRAMNAME installer
+
+By using this software you must agree all below terms:
+    1) By using this software, it's the end user’s responsibility to obey all applicable local, state and federal laws.
+    2) The software is provided \"as is\", without warranty of any kind, express or implied.
+    3) $DEVELOPERNAME isn't responsible for any damage caused by this software.
+
+[?] If you agree, press [Enter] to procede:"
+read junk
+
+if [ "$(uname)" == "Darwin" ]; then
+  install_python_mac
+elif [ "$(expr substr $(uname -s) 1 5)" == "Linux" ]; then
+  install_python_linux
+else
+  echo "[x] Only MacOS and Linux operating system are supported."
+fi
+
 echo "[*] Installing python requirements..."
 pip3 install -r requirements.txt > /dev/null 2>&1;
 
-# Install the script in the opt directory
 echo "[*] Installing the software..."
 mkdir /opt/$SHORTPROGRAMNAME > /dev/null 2>&1;
 cp src/$SHORTPROGRAMNAME.py /opt/$SHORTPROGRAMNAME > /dev/null 2>&1;
 chmod +x /opt/$SHORTPROGRAMNAME/$SHORTPROGRAMNAME.py > /dev/null 2>&1;
 
-# Create the command for the shell
 echo "[*] Setting up the environment..."
 ln -s /opt/$SHORTPROGRAMNAME/$SHORTPROGRAMNAME.py /usr/bin/$SHORTPROGRAMNAME > /dev/null 2>&1;