first commit

.gitignore

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+*.*
+*
+!*/
+!Makefile
+!.gitignore
+!init.sh

Makefile

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+-include nemu/Makefile.git
+ 
+clean:
+	-$(MAKE) -C nemu clean
+	-$(MAKE) -C nexus-am clean
+	-$(MAKE) -C nanos-lite clean
+	-$(MAKE) -C navy-apps clean
+
+submit: clean
+	git gc
+	cd .. && tar cj $(basename $(shell pwd)) > $(STU_ID).tar.bz2
+
+.PHONY: clean submit

init.sh

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+#!/bin/bash
+
+function init() {
+  if test -d $1; then
+    echo "$1 is already initialized, exiting..."
+    return
+  fi
+
+  git clone -b ics2017 https://github.com/NJU-ProjectN/$1.git
+  rm -rf $1/.git
+
+  if test $2; then
+    sed -i -e "/^export $2=.*/d" ~/.bashrc
+    echo "export $2=`realpath $1`" >> ~/.bashrc
+  fi
+}
+
+read -r -p "Are you sure to initialize everything? [y/n] " input
+case $input in
+  [yY])
+    init nemu NEMU_HOME
+    init nexus-am AM_HOME
+    init nanos-lite
+    init navy-apps NAVY_HOME
+
+    git add -A
+    git commit -am "ics2017 initialized"
+    ;;
+
+  [nN])
+    ;;
+
+  *)
+    echo "Invalid input..."
+    ;;
+esac