原理：
rosdep官方最新版源码直接修改，将其地址修改为国内gitee地址，名字改成rosdepc以区分
安装：
sudo pip install rosdepc
sudo rosdepc init
rosdepc update
问题解决：
1、没有pip？ 换成pip3
2、pip3也没有？ 安装 python-pip
sudo apt-get install python3-pip
sudo pip install rosdepc**
或者
在安装ROS的过程中，很多同学在执行上述指令时会提示以下错误：
ERROR: cannot download default sources list from:
https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/sources.list.d/20-default.list
Website may be down.
通常的解决办法是用手机热点
或者查询
https://raw.githubusercontent.com的实际IP地址，但是也有可能会失效。
偶然的机会看到一教程的解决方案。
博主的思路是新思路:将相关资源备份到 gitee,修改 rosdep 源码,重新定位资源。成功率是百分百。(原文链接请点击“阅读原文”)
整理修改后提供解决ROS rosdep init/update报错的方法（终极版）。
步骤1
进入到 sources.list.d 文件夹（如果没有，则新建）
修改 gedit 20-default.list
cd /etc/ros/rosdep/sources.list.d
sudo gedit 20-default.list
将里面所有的
raw.githubusercontent.com/ros/rosdistro/master
替换成
gitee.com/wybros/rosdistro/raw/master
修改前：
os-specific listings first
yaml https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/osx-homebrew.yaml osx
generic
yaml https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/base.yaml
yaml https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/python.yaml
yaml https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/ruby.yaml
gbpdistro https://raw.githubusercontent.com/ros/rosdistro/master/releases/fuerte.yaml fuerte
newer distributions (Groovy, Hydro, …) must not be listed anymore, they are being fetched from the rosdistro index.yaml instead
修改后：
os-specific listings first rosdep update
yaml https://gitee.com/wybros/rosdistro/raw/master/rosdep/osx-homebrew.yaml osx
generic
yaml https://gitee.com/wybros/rosdistro/raw/master/rosdep/base.yaml
yaml https://gitee.com/wybros/rosdistro/raw/master/rosdep/python.yaml
yaml https://gitee.com/wybros/rosdistro/raw/master/rosdep/ruby.yaml
gbpdistro https://gitee.com/wybros/rosdistro/raw/master/releases/fuerte.yaml fuerte
newer distributions (Groovy, Hydro, …) must not be listed anymore, they are being fetched from the rosdistro index.yaml instead
步骤2
进入到 rosdep2 文件夹，
修改 gbpdistro_support.py
cd /usr/lib/python2.7/dist-packages/rosdep2/
sudo gedit gbpdistro_support.py
将里面所有的
raw.githubusercontent.com/ros/rosdistro/master
替换成
gitee.com/wybros/rosdistro/raw/master
修改后如下
FUERTE_GBPDISTRO_URL = ‘https://gitee.com/wybros/rosdistro/raw/’
‘master/releases/fuerte.yaml’
步骤3
进入到 rosdep2 文件夹，
修改 rep3.py
cd /usr/lib/python2.7/dist-packages/rosdep2/
sudo gedit rep3.py
将里面所有的
raw.githubusercontent.com/ros/rosdistro/master
替换成
gitee.com/wybros/rosdistro/raw/master
修改后如下
REP3_TARGETS_URL = ‘https://gitee.com/wybros/rosdistro/raw/master/releases/targets.yaml’
步骤4
进入到 rosdep2 文件夹，
修改 sources_list.py
cd /usr/lib/python2.7/dist-packages/rosdep2/
sudo gedit sources_list.py
将里面所有的
raw.githubusercontent.com/ros/rosdistro/master
替换成
gitee.com/wybros/rosdistro/raw/master
修改后如下
DEFAULT_SOURCES_LIST_URL = ‘https://gitee.com/wybros/rosdistro/raw/master/rosdep/sources.list.d/20-default.list’
步骤5
进入到 rosdistro 文件夹
修改 init.py
cd /usr/lib/python2.7/dist-packages/rosdistro/
sudo gedit init.py
将里面所有的
raw.githubusercontent.com/ros/rosdistro/master
替换成
gitee.com/wybros/rosdistro/raw/master
修改后如下
DEFAULT_INDEX_URL = ‘https://gitee.com/wybros/rosdistro/raw/master/index-v4.yaml’
最后
打开新终端执行
rosdep update
如果出现如下提示则表示成功！
