diff --git a/README.en.md b/README.en.md
index 206895f..4b1b02e 100644
--- a/README.en.md
+++ b/README.en.md
@@ -1,4 +1,5 @@
 # of_cmake_config
+[中文](README.md) | [英文](README.en.md)
 
 #### Description
 This project is used to generate CMakeLists.txt for OpenFOAM project.
@@ -13,4 +14,8 @@ This project is used to generate CMakeLists.txt for OpenFOAM project.
 #### Instructions
 
 1.  Activate OpenFOAM environment
-2.  In project root path, run `ofCmakeConfig`
+2.  In project root path, 
+    - run `ofCmakeConfig` to generate `CMakeLists.txt`
+    - or run `occ`, which is a wrapper of `ofCmakeConfig` script, to generate `CMakeLists.txt` and `compile_commands.json`.
+
+[video demo](demo/occ_demo.mp4)
\ No newline at end of file
diff --git a/README.md b/README.md
index 31cb8a0..c302851 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,5 @@
 # of_cmake_config
+[中文](README.md) | [英文](README.en.md)
 
 #### 介绍
 本项目用于生成OpenFOAM项目的CMakeLists.txt
@@ -13,4 +14,13 @@
 #### 使用说明
 
 0. 激活OpenFOAM环境
-1. 在项目根目录下, 运行 `ofCmakeConfig`
+1. 在项目根目录下, 
+    - 运行 `ofCmakeConfig`，生成`CMakeLists.txt`
+    - 或运行`occ`，其包装了`ofCmakeConfig`，除了生成`CMakeLists.txt`，还会调用cmake，生成`compile_commands.json`。
+
+
+#### 测试环境
+- `vscode` + `clangd`
+- `vim` + `coc-clangd`
+
+[视频演示](demo/occ_demo.mp4)
diff --git a/demo/occ_demo.mp4 b/demo/occ_demo.mp4
new file mode 100644
index 0000000..1fd4074
Binary files /dev/null and b/demo/occ_demo.mp4 differ
diff --git a/install b/install
index 0521094..6ee4979 100755
--- a/install
+++ b/install
@@ -5,8 +5,9 @@ if [ -d $objDir ]
 then
     cwd=`pwd`
     chmod +x ./ofCmakeConfig
-    rm -f $objDir/ofCmakeConfig
+    rm -f $objDir/ofCmakeConfig $objDir/occ
     ln -s $cwd/ofCmakeConfig $objDir/
+    ln -s $cwd/occ $objDir/
     echo "installed ofCmakeConfig"
 else
     echo "please active OpenFOAM environment"
diff --git a/occ b/occ
new file mode 100644
index 0000000..f3c07fd
--- /dev/null
+++ b/occ
@@ -0,0 +1,4 @@
+#!/bin/bash
+ofCmakeConfig
+rm -r build && mkdir build
+cmake -Bbuild -DCMAKE_EXPORT_COMPILE_COMMANDS=1 .
\ No newline at end of file
diff --git a/ofCmakeConfig b/ofCmakeConfig
index 7318863..190f233 100755
--- a/ofCmakeConfig
+++ b/ofCmakeConfig
@@ -3,12 +3,6 @@ Script="${0##*/}"                   # Need 'Script' for wmakeFunctions messages
 scriptsDir="${0%/*}"/scripts        # wmake/scripts directory
 . "$scriptsDir"/wmakeFunctions      # Source wmake functions
 
-# TODO: 检查当前路径是否是CMAKE_SOURCE_DIR
-# 其中包含.vscode, CMakeLists.txt
-# ...
-
-# TODO: 根据OF环境变量，设置安装目录
-
 
 printInfo() {
     if [ -f "$WM_DIR"/makefiles/info ]
@@ -40,8 +34,6 @@ link_flags_extra="-Xlinker $link_flags_extra"
 OF_compile_flags=`printInfo "cxxflags"`
 OF_compile_flags="$OF_compile_flags -iquote."
 OF_link_flags="$OF_compile_flags $link_flags_extra"
-# echo OF_compile_flags: $OF_compile_flags
-# echo OF_link_flags: $OF_link_flags
 
 OF_project_name=`cat Make/files | grep EXE | grep -oP '(?<=/).*$'`
 OF_typestr="add_executable"
@@ -51,10 +43,7 @@ then
     OF_typestr="add_library"
 fi
 
-# echo OF_testCaseDir: '${CMAKE_SORCE_DIR}/testCase'
 OF_sources=`cat Make/files | grep -oP '.*\.C'`
-# echo OF_sources: $OF_sources
-# update OF_typestr
 if [ $OF_typestr = "add_executable" ]
 then
     OF_typestr="$OF_typestr(\${project_name} \${OF_sources})"
@@ -79,57 +68,6 @@ OF_includeDir=`echo $OF_includeDir | sed 's/ /\n/g'`
 OF_linkLib=`echo $s | sed 's/ /\n/g' | grep -E '^-l' | sort | uniq |grep -oP '(?<=-l).*'`
 OF_linkDir=$WM_PROJECT_DIR/platforms/$WM_OPTIONS/lib
 OF_linkDir=`echo "$OF_linkDir $FOAM_USER_LIBBIN" | sed 's/ /\n/g'`
-# echo OF_linkLib: $OF_linkLib
-# echo OF_linkDir: $OF_linkDir
-
-# 写入文件 .vscode/of-gdb.sh
-mkdir -p .vscode
-cat > .vscode/of-gdb.sh <<EOF
-#!/bin/bash
-source $FOAM_ETC/bashrc WM_MPLIB=$WM_MPLIB WM_COMPILE_OPTION=$WM_COMPILE_OPTION WM_COMPILER=$WM_COMPILER
-/usr/bin/gdb "\$@"
-EOF
-# 写入文件 .vscode/launch.json
-cat > .vscode/launch.json << EOF
-{
-    "version": "0.2.0",
-    "configurations": [
-        {
-            "name": "(gdb) Launch",
-            "type": "cppdbg",
-            "request": "launch",
-            // Resolved by CMake Tools:
-            "program": "\${command:cmake.launchTargetPath}",
-            "args": [],
-            "stopAtEntry": true,
-            "cwd": "\${workspaceFolder}/testCase",
-            "environment": [
-                {
-                    // add the directory where our target was built to the PATHs
-                    // it gets resolved by CMake Tools:
-                    "name": "PATH",
-                    "value": "\${env:PATH}:\${command:cmake.getLaunchTargetDirectory}"
-                },
-                {
-                    "name": "OTHER_VALUE",
-                    "value": "Something something"
-                }
-            ],
-            "externalConsole": false,
-            "MIMode": "gdb",
-            "miDebuggerPath": "\${workspaceFolder}/.vscode/of-gdb.sh",
-            "setupCommands": [
-                {
-                    "description": "Enable pretty-printing for gdb",
-                    "text": "-enable-pretty-printing",
-                    "ignoreFailures": true
-                }
-            ]
-        }
-    ]
-}
-EOF
-chmod +x .vscode/of-gdb.sh
 
 # 写入文件 CMakeLists.txt
 cat > CMakeLists.txt <<EOF