use git submodule manage the dependency

.gitignore

@@ -4,7 +4,6 @@ test*
 *.conf
 Local*
 bin
-mshadow
 config.mk
 layer.h
 layer_impl-inl.hpp
@@ -14,10 +13,7 @@ im2bin
 *.pyc
 example
 *.log
-ps-lite
-dmlc-core
 bin
-rabit
 *.opensdf
 *.sdf
 *.pdb
@@ -26,4 +22,4 @@ rabit
 *.deps
 *.cache
 *state
-*build
+*build

.gitmodules

@@ -0,0 +1,12 @@
+[submodule "rabit"]
+	path = rabit
+	url = https://github.com/dmlc/rabit.git
+[submodule "mshadow"]
+	path = mshadow
+	url = https://github.com/dmlc/mshadow.git
+[submodule "dmlc-core"]
+	path = dmlc-core
+	url = https://github.com/dmlc/dmlc-core.git
+[submodule "ps-lite"]
+	path = ps-lite
+	url = https://github.com/dmlc/ps-lite.git

build.sh

@@ -1,17 +1,5 @@
 #! /bin/bash
 
-if [ ! -d mshadow ]; then
-    git clone https://github.com/dmlc/mshadow.git
-fi
-
-if [ ! -d rabit ]; then
-    git clone https://github.com/dmlc/rabit.git
-fi
-
-if [ ! -d dmlc-core ]; then
-    git clone https://github.com/dmlc/dmlc-core.git
-fi
-
 
 if [ ! -f config.mk ]; then
     echo "Use the default config.m"

build_ps.sh

@@ -1,25 +1,12 @@
 #! /bin/bash
 
 if [ ! -d ps-lite ]; then
-    git clone https://github.com/dmlc/ps-lite
     echo "Install third-party libraries for PS"
     ./ps-lite/make/install_deps.sh 1>install_ps.log
     echo "Compile PS"
     make -j 4 -C ps-lite
 fi
 
-if [ ! -d rabit ]; then
-    git clone https://github.com/dmlc/rabit.git
-fi
-
-if [ ! -d mshadow ]; then
-    git clone https://github.com/dmlc/mshadow.git
-fi
-
-if [ ! -d dmlc-core ]; then
-    git clone https://github.com/dmlc/dmlc-core.git
-fi
-
 if [ ! -f config.mk ]; then
     echo "Use the default config.m"
     cp make/config.mk config.mk