update mirror, use utils functions.

+#!/bin/bash
+
+#############################################
+# help for the first checkout.
+#############################################
+function first_checkout()
+{
+    mirror_name=$1
+    git_url=$2
+    project_dir=$3
+    sync_script=$4
+    
+    failed_msg "当前分支不是${mirror_name}镜像"; 
+    
+    cat <<END
+创建${mirror_name}镜像的过程如下：
+1. 在${mirror_name}上创建项目，
+        可创建空项目，或从https://github.com/winlinvip/simple-rtmp-server拷贝过来。
+2. 在本地虚拟机上：    
+        git clone $git_url
+        cd $project_dir && git checkout master && git branch 1.0release && git push origin 1.0release
+3. 创建同步的branch：    
+        git remote add upstream https://github.com/winlinvip/simple-rtmp-server.git
+        git fetch upstream    
+        git checkout upstream/master -b srs.master
+        git checkout upstream/1.0release -b srs.1.0release
+4. 执行本同步更新脚本，更新。
+        bash $sync_script
+END
+}
+
+#############################################
+# branch master
+#############################################
+function sync_master()
+{
+    for ((;;)); do
+        git checkout srs.master && git pull 
+        ret=$?; if [[ 0 -ne $ret ]]; then 
+            failed_msg "(master)更新github分支失败，自动重试";
+            continue
+        else
+            ok_msg "(master)更新github分支成功"
+        fi
+        break
+    done
+
+    git checkout master && git merge srs.master
+    ret=$?; if [[ 0 -ne $ret ]]; then failed_msg "(master)合并github分支失败, ret=$ret"; exit $ret; fi
+    ok_msg "(master)合并github分支成功"
+}
+
+#############################################
+# branch 1.0release
+#############################################
+function sync_1_0_release()
+{
+    for ((;;)); do
+        git checkout srs.1.0release && git pull 
+        ret=$?; if [[ 0 -ne $ret ]]; then 
+            failed_msg "(1.0release)更新github分支失败，自动重试";
+            continue
+        else
+            ok_msg "(1.0release)更新github分支成功"
+        fi
+        break
+    done
+
+    git checkout 1.0release && git merge srs.1.0release
+    ret=$?; if [[ 0 -ne $ret ]]; then failed_msg "(1.0release)合并github分支失败, ret=$ret"; exit $ret; fi
+    ok_msg "(1.0release)合并github分支成功"
+}
+
+#############################################
+# push
+#############################################
+function sync_push()
+{
+    mirror_name=$1
+    
+    for ((;;)); do 
+        git push
+        ret=$?; if [[ 0 -ne $ret ]]; then 
+            failed_msg "提交${mirror_name}分支失败，自动重试";
+            continue
+        else
+            ok_msg "提交${mirror_name}分支成功"
+        fi
+        break
+    done
+
+    git checkout master
+    ok_msg "${mirror_name}同步git成功"
+}

@@ -20,78 +20,18 @@ cd $work_dir
 ret=$?; if [[ $ret -ne 0 ]]; then exit $ret; fi
 ok_msg "导入脚本成功"
 
+source $work_dir/scripts/_mirror.utils.sh
+
 git remote -v|grep code.csdn.net >/dev/null 2>&1
 ret=$?; if [[ 0 -ne $ret ]]; then 
-    failed_msg "当前分支不是CSDN镜像"; 
-    cat <<END
-创建CSDN镜像的过程如下：
-1. 在CSDN上创建项目，从https://github.com/winlinvip/simple-rtmp-server拷贝过来。
-2. 在本地虚拟机上：    
-      git clone git@code.csdn.net:winlinvip/srs-csdn.git
-	  cd srs-csdn && git checkout master && git branch 1.0release && git push origin 1.0release
-3. 创建同步的branch：    
-      git remote add upstream https://github.com/winlinvip/simple-rtmp-server.git
-      git fetch upstream    
-      git checkout upstream/master -b srs.master
-	  git checkout upstream/1.0release -b srs.1.0release
-4. 执行本同步更新脚本，更新。
-      bash scripts/csdn.mirror.sh
-END
+    first_checkout "CSDN" \
+        "git@code.csdn.net:winlinvip/srs-csdn.git" \
+        "srs-csdn" "$work_dir/scripts/csdn.mirror.sh"
     exit 0; 
 fi 
 
-#############################################
-# branch master
-#############################################
-for ((;;)); do
-    git checkout srs.master && git pull 
-    ret=$?; if [[ 0 -ne $ret ]]; then 
-        failed_msg "(master)更新github分支失败，自动重试";
-        continue
-    else
-        ok_msg "(master)更新github分支成功"
-    fi
-    break
-done
-
-git checkout master && git merge srs.master
-ret=$?; if [[ 0 -ne $ret ]]; then failed_msg "(master)合并github分支失败, ret=$ret"; exit $ret; fi
-ok_msg "(master)合并github分支成功"
-
-#############################################
-# branch 1.0release
-#############################################
-for ((;;)); do
-    git checkout srs.1.0release && git pull 
-    ret=$?; if [[ 0 -ne $ret ]]; then 
-        failed_msg "(1.0release)更新github分支失败，自动重试";
-        continue
-    else
-        ok_msg "(1.0release)更新github分支成功"
-    fi
-    break
-done
-
-git checkout 1.0release && git merge srs.1.0release
-ret=$?; if [[ 0 -ne $ret ]]; then failed_msg "(1.0release)合并github分支失败, ret=$ret"; exit $ret; fi
-ok_msg "(1.0release)合并github分支成功"
-
-#############################################
-# push
-#############################################
-
-for ((;;)); do 
-    git push
-    ret=$?; if [[ 0 -ne $ret ]]; then 
-        failed_msg "提交CSDN分支失败，自动重试";
-        continue
-    else
-        ok_msg "提交CSDN分支成功"
-    fi
-    break
-done
-
-git checkout master
-ok_msg "CSDN同步git成功"
+sync_master
+sync_1_0_release
+sync_push "CSDN"
 
 exit 0

@@ -20,78 +20,18 @@ cd $work_dir
 ret=$?; if [[ $ret -ne 0 ]]; then exit $ret; fi
 ok_msg "导入脚本成功"
 
+source $work_dir/scripts/_mirror.utils.sh
+
 git remote -v|grep git.oschina.net >/dev/null 2>&1
 ret=$?; if [[ 0 -ne $ret ]]; then 
-    failed_msg "当前分支不是OSChina镜像"; 
-    cat <<END
-创建OSChina镜像的过程如下：
-1. 在OSChina上创建项目，从https://github.com/winlinvip/simple-rtmp-server拷贝过来。
-2. 在本地虚拟机上：    
-      git clone git@git.oschina.net:winlinvip/srs.oschina.git
-	  cd srs.oschina && git checkout master && git branch 1.0release && git push origin 1.0release
-3. 创建同步的branch：    
-      git remote add upstream https://github.com/winlinvip/simple-rtmp-server.git
-      git fetch upstream    
-      git checkout upstream/master -b srs.master
-	  git checkout upstream/1.0release -b srs.1.0release
-4. 执行本同步更新脚本，更新。
-      bash scripts/oschina.mirror.sh
-END
+    first_checkout "OSChina" \
+        "git@git.oschina.net:winlinvip/srs.oschina.git" \
+        "srs.oschina" "$work_dir/scripts/oschina.mirror.sh"
     exit 0; 
 fi 
 
-#############################################
-# branch master
-#############################################
-for ((;;)); do
-    git checkout srs.master && git pull 
-    ret=$?; if [[ 0 -ne $ret ]]; then 
-        failed_msg "(master)更新github分支失败，自动重试";
-        continue
-    else
-        ok_msg "(master)更新github分支成功"
-    fi
-    break
-done
-
-git checkout master && git merge srs.master
-ret=$?; if [[ 0 -ne $ret ]]; then failed_msg "(master)合并github分支失败, ret=$ret"; exit $ret; fi
-ok_msg "(master)合并github分支成功"
-
-#############################################
-# branch 1.0release
-#############################################
-for ((;;)); do
-    git checkout srs.1.0release && git pull 
-    ret=$?; if [[ 0 -ne $ret ]]; then 
-        failed_msg "(1.0release)更新github分支失败，自动重试";
-        continue
-    else
-        ok_msg "(1.0release)更新github分支成功"
-    fi
-    break
-done
-
-git checkout 1.0release && git merge srs.1.0release
-ret=$?; if [[ 0 -ne $ret ]]; then failed_msg "(1.0release)合并github分支失败, ret=$ret"; exit $ret; fi
-ok_msg "(1.0release)合并github分支成功"
-
-#############################################
-# push
-#############################################
-
-for ((;;)); do 
-    git push
-    ret=$?; if [[ 0 -ne $ret ]]; then 
-        failed_msg "提交OSChina分支失败，自动重试";
-        continue
-    else
-        ok_msg "提交OSChina分支成功"
-    fi
-    break
-done
-
-git checkout master
-ok_msg "OSChina同步git成功"
+sync_master
+sync_1_0_release
+sync_push "OSChina"
 
 exit 0