3D进阶之CloudCompare：使用脚本添加git子项目依赖（.gitmodules）并用VS2019编译

（一）如何添加子依赖项目

从github上下载下来的文件，例如，

https://github.com/CloudCompare/CloudCompare/archive/refs/tags/v2.12.0.tar.gz

里面明明是有一个在.gitmodules文件的，内容如下，

[submodule "plugins/core/IO/qE57IO/extern/libE57Format"]
	path = plugins/core/IO/qE57IO/extern/libE57Format
	url = https://github.com/asmaloney/libE57Format
[submodule "extern/CCCoreLib"]
	path = libs/qCC_db/extern/CCCoreLib
	url = https://github.com/CloudCompare/CCCoreLib
[submodule "plugins/core/Standard/qPoissonRecon/extern/PoissonRecon"]
	path = plugins/core/Standard/qPoissonRecon/extern/PoissonRecon
	url = https://github.com/cloudcompare/PoissonRecon
[submodule "plugins/core/Standard/qMPlane"]
	path = plugins/core/Standard/qMPlane
	url = https://github.com/hvs-ait/mplane-plugin
[submodule "plugins/core/Standard/qColorimetricSegmenter"]
	path = plugins/core/Standard/qColorimetricSegmenter
	url = https://gitlab.univ-nantes.fr/E164955Z/ptrans
[submodule "plugins/core/Standard/qMasonry"]
	path = plugins/core/Standard/qMasonry
	url = https://github.com/CyberbuildLab/masonry-cc
[submodule "plugins/core/Standard/qJSonRPCPlugin"]
	path = plugins/core/Standard/qJSonRPCPlugin
	url = https://gitlab.com/theadib/JSonRPCPlugin.git
[submodule "plugins/core/Standard/qCanupo/contrib/dlib"]
	path = plugins/core/Standard/qCanupo/contrib/dlib
	url = https://github.com/davisking/dlib.git

可是，当你希望通过下面的指令克隆这些子项目依赖项时，会发现根本就没有反应【1】。

办法（1）当然你可以手动一个个去添加，不过这会非常麻烦。

办法（2）使用分支，

> git clone -b v2.12.0 --recursive https://github.com/CloudCompare/CloudCompare.git CC2120b

这里命名CC2120b是拷贝下来后重新命名的文件夹名称。

但这有个问题，有些项目是没有子分支的，或者，某些项目已经被删除了，git命令没办法找到github上的origin项目。

办法（3）使用脚本（具体可参考资料【1】）

假设你的项目解压后在CC2120b文件夹内，那就在这个文件夹内建一个脚本script.sh，然后在git bash中运行这些脚本就好了（使用命令：sh  script.sh)，

如果需要逐个克隆并回复y：

#!/bin/bash

set -e
rm -rf .git
git init

git config -f .gitmodules --get-regexp '^submodule\..*\.path$' > tempfile

while read -u 3 path_key path
do
    url_key=$(echo $path_key | sed 's/\.path/.url/')
    url=$(git config -f .gitmodules --get "$url_key")

    read -p "Are you sure you want to delete $path and re-initialize as a new submodule? " yn
    case $yn in
        [Yy]* ) rm -rf $path; git submodule add $url $path; echo "$path has been initialized";;
        [Nn]* ) exit;;
        * ) echo "Please answer yes or no.";;
    esac

done 3