Modify scripts to support python3.

scripts/setup-seafile-mysql.sh

@@ -23,57 +23,27 @@ function check_python_executable() {
         return 0
     fi
 
-    if which python2.7 2>/dev/null 1>&2; then
-        PYTHON=python2.7
-    elif which python27 2>/dev/null 1>&2; then
-        PYTHON=python27
-    else
+    if !(python --version 2>&1 | grep "3\.[0-9]\.[0-9]") 2>/dev/null 1>&2; then
         echo
-        echo "Can't find a python executable of version 2.7 or above in PATH"
-        echo "Install python 2.7+ before continue."
+        echo "The current version of python is not 3.x.x, please use Python 3.x.x ."
+        echo
+        err_and_quit
+    fi
+
+    PYTHON="python"$(python --version | cut -b 8-10)
+    if !which $PYTHON 2>/dev/null 1>&2; then
+        echo
+        echo "Can't find a python executable of $PYTHON in PATH"
+        echo "Install $PYTHON before continue."
         echo "Or if you installed it in a non-standard PATH, set the PYTHON enviroment varirable to it"
         echo
-        exit 1
+        err_and_quit
     fi
 }
 
-function check_python_module () {
-    module=$1
-    name=$2
-    hint=$3
-    printf "  Checking python module: ${name} ... "
-    if ! $PYTHON -c "import ${module}" 2>/dev/null 1>&2; then
-        echo
-        printf "\033[33m ${name} \033[m is not installed, Please install it first.\n"
-        if [[ "${hint}" != "" ]]; then
-            printf "${hint}"
-            echo
-        fi
-        err_and_quit;
-    fi
-    echo -e "Done."
-}
-
 function check_python () {
     echo "Checking python on this machine ..."
     check_python_executable
-    if ! which $PYTHON 2>/dev/null 1>&2; then
-        echo "No $PYTHON found on this machine. Please install it first."
-        err_and_quit;
-    else
-        if ($Python --version 2>&1 | grep "3\\.[0-9].\\.[0-9]") 2>/dev/null 1>&2 ; then
-            printf "\033[33m Python version 3.x \033[m detected\n"
-            echo "Python 3.x is not supported. Please use python 2.x. Now quit."
-            err_and_quit;
-        fi
-
-        if [[ $PYTHON == "python2.6" ]]; then
-            py26="2.6"
-        fi
-
-        hint='\nOn Debian/Ubuntu:\n\nsudo apt-get install python-mysqldb\n\nOn CentOS/RHEL:\n\nsudo yum install MySQL-python'
-        check_python_module MySQLdb python-mysqldb "${hint}"
-    fi
     echo
 }