Added Gentoo script

mrgkernel.sh

@@ -0,0 +1,96 @@
+#! /bin/bash
+
+# Gentoo version
+
+# Some colors
+GREEN='\033[0;32m'
+RED='\033[0;31m'
+DEFAULT='\033[0m'
+
+# Defaults values
+DIR="/usr/src/"
+PREFIX='linux-'
+EXTENSION='.tar.xz'
+MAINLINE=1
+SHOW_MENU_CONFIG=0
+CURRENT_VERSION=`uname -r`
+
+# Function to script script if step fail
+isPreviousStepOk () {
+  if [ $? -ne 0 ]; then
+    echo -e "${RED} Error!${DEFAULT}"
+    exit 1
+  fi
+}
+
+if [[ $EUID -ne 0 ]]; then
+  echo "This script must be run as root" 1>&2
+  sudo $0
+  exit 1
+fi
+
+# Get last kernel version
+INFO=`curl -Ls https://www.kernel.org/ | perl -lne 'BEGIN{$/=""} print "$1 $2" if \
+    /latest_link.*?<a.*?href=\"(.*?)\".*?>(.*?)</s'`
+
+# Extract some values from kernel name
+KERNEL=`echo ${INFO} | cut -d' ' -f 2`
+URL=`echo ${INFO} | cut -d' ' -f 1`
+FILE=`echo ${URL}|rev|cut -d'/' -f 1 | rev`
+
+if [ "${CURRENT_VERSION}" == "${KERNEL}" ]; then
+  echo -e "${RED}You are already on the latest version${DEFAULT}"
+  exit 1
+fi
+
+# Go to build dir
+cd ${DIR} || exit
+
+# Get kernel archive
+wget ${URL}
+isPreviousStepOk
+
+# Extract kernel archive
+tar xavf "${FILE}"
+isPreviousStepOk
+
+# Updated symlink
+ln -snf linux-${KERNEL} linux
+isPreviousStepOk
+
+# Enter kernel directory
+
+cd linux
+isPreviousStepOk
+
+# Get old config
+make oldconfig
+isPreviousStepOk
+
+# Show kernel menu
+if [ ${SHOW_MENU_CONFIG} -eq 1 ]; then
+  make menuconfig
+fi
+
+# Build kernel
+make -j$(nproc)
+
+# Build modules
+make modules_install
+
+# Install kernel
+make install
+
+# Update grub
+grub-mkconfig -o /boot/grub/grub.cfg
+
+# Rebuild modules
+emerge --ask --verbose @module-rebuild
+
+# Go to parent directory
+cd ..
+
+# Remove archive
+rm ${FILE}
+
+echo -e "${GREEN} ALL DONE!\n"