输入sudo rosdep init 出现
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.
下载 git clone https://github.com/ros/rosdistro.git 将其中涉及到 raw.githubusercontant.com 的路径替换为本地路径：
1.sudo nano rosdistro/rosdep/sources.list.d/20-default.list （原demo）
# os-specific listings first yaml https://raw.github.com/ros/rosdistro/master/rosdep/osx-homebrew.yaml osx # generic yaml https://raw.github.com/ros/rosdistro/master/rosdep/base.yaml yaml https://raw.github.com/ros/rosdistro/master/rosdep/python.yaml yaml https://raw.github.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
改（XXX为自己的用户名,下面遇到的都这么改）
# os-specific listings first yaml file:///home/XXX/rosdistro/rosdep/osx-homebrew.yaml osx # generic yaml file:///home/XXX/rosdistro/rosdep/base.yaml yaml file:///home/XXX/rosdistro/rosdep/python.yaml yaml file:///home/XXX/rosdistro/rosdep/ruby.yaml gbpdistro file:///home/XXX/rosdistro/releases/fuerte.yaml fuerte # newer distributions (Groovy, Hydro, ...) must not be listed anymore, they are being fetched from the rosdistro index.yaml instead
2.修改路径 sudo nano /usr/lib/python2.7/dist-packages/rosdep2/rep3.py
REP3_TARGETS_URL = 'file:///home/XXX/rosdistro/releases/targets.yaml'
3.修改路径 sudo nano /usr/lib/python2.7/dist-packages/rosdep2/sources_list.py
DEFAULT_SOURCES_LIST_URL = 'file:///home/XXX/rosdistro/rosdep/sources.list.d/20-default.list'
4.修改路径 sudo nano /usr/lib/python2.7/dist-packages/rosdistro/__init__.py
DEFAULT_INDEX_URL = 'file:///home/XXX/rosdistro/index-v4.yaml'
5.修改路径 sudo nano /usr/lib/python2.7/dist-packages/rosdep2/gbpdistro_support.py
FUERTE_GBPDISTRO_URL = 'file:///home/XXX/rosdistro/releases/fuerte.yaml'
输入sudo rosdep init
如果出现
ERROR: default sources list file already exists: /etc/ros/rosdep/sources.list.d/20-default.list Please delete if you wish to re-initialize
那就输入
sudo rm /etc/ros/rosdep/sources.list.d/20-default.list
如果提示
Wrote /etc/ros/rosdep/sources.list.d/20-default.list Recommended: please run rosdep update
直接输入 rosdep update
仅作为笔记自学！
