Installation series of ROS system (II): ROS rosdep init/update error reporting solution

1、 Problem description

In the installation ROS In the process of , You may find a lot of friends , In the input rosdep init or rosdep update The following errors are sometimes prompted when instructing ：

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.

2、 Question why

For the above questions , The main reason is the network problem （ No scientific access raw.githubusercontent.com）.

3、 General solutions

1） Enable mobile hotspot access

The computer accesses the network through the mobile hotspot , You can try the download process several times , It is possible to succeed in the end , But according to my previous experience , The success rate of this method is not too high .

2） modify hosts The way ：

Query through the domain name resolution tool https://raw.githubusercontent.com Reality IP Address , Will be IP Add to hosts in , But this method may fail .

4、 Reliable solutions （ To test that ）

General idea ： Since the visit https://raw.githubusercontent.com Not stable , Then we will back up relevant resources to the third-party code hosting platform with faster access speed （ This article uses domestic resources Gitee, Domestic utilization Gitee Accelerated access can be achieved GitHub Warehouse ）, modify rosdep Source code , Then relocate the resources .

1） modify gedit 20-default.list

Enter into sources.list.d Folder （ without , The new ）
modify gedit 20-default.list

cd /etc/ros/rosdep/sources.list.d
sudo gedit 20-default.list 

Put all the... In it
raw.githubusercontent.com/ros/rosdistro/master
Replace with
gitee.com/openwork2020/rosdistro/raw/master

The corresponding part is modified ：

# os-specific listings first rosdep update
yaml https://gitee.com/openwork2020/rosdistro/raw/master/rosdep/osx-homebrew.yaml osx

# generic
yaml https://gitee.com/openwork2020/rosdistro/raw/master/rosdep/base.yaml
yaml https://gitee.com/openwork2020/rosdistro/raw/master/rosdep/python.yaml
yaml https://gitee.com/openwork2020/rosdistro/raw/master/rosdep/ruby.yaml
gbpdistro https://gitee.com/openwork2020/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

2） modify gbpdistro_support.py

Enter into rosdep2 Folder ,
modify gbpdistro_support.py

cd /usr/lib/python2.7/dist-packages/rosdep2/
sudo gedit gbpdistro_support.py

Put all the... In it
raw.githubusercontent.com/ros/rosdistro/master
Replace with
gitee.com/openwork2020/rosdistro/raw/master

The corresponding part is modified ：

FUERTE_GBPDISTRO_URL = 'https://gitee.com/openwork2020/rosdistro/raw/master/releases/fuerte.yaml'

3） modify rep3.py

Enter into rosdep2 Folder ,
modify rep3.py

cd /usr/lib/python2.7/dist-packages/rosdep2/
sudo gedit rep3.py

Put all the... In it
raw.githubusercontent.com/ros/rosdistro/master
Replace with
gitee.com/openwork2020/rosdistro/raw/master

The corresponding part is modified ：

REP3_TARGETS_URL = 'https://gitee.com/openwork2020/rosdistro/raw/master/releases/targets.yaml'

4） modify sources_list.py

Enter into rosdep2 Folder ,
modify sources_list.py

cd /usr/lib/python2.7/dist-packages/rosdep2/
sudo gedit sources_list.py

Put all the... In it
raw.githubusercontent.com/ros/rosdistro/master
Replace with
gitee.com/openwork2020/rosdistro/raw/master

The corresponding part is modified ：

DEFAULT_SOURCES_LIST_URL = 'https://gitee.com/openwork2020/rosdistro/raw/master/rosdep/sources.list.d/20-default.list'

5） modify init.py

Enter into rosdistro Folder
modify init.py

cd /usr/lib/python2.7/dist-packages/rosdistro/
sudo gedit __init__.py

Put all the... In it
raw.githubusercontent.com/ros/rosdistro/master
Replace with
gitee.com/openwork2020/rosdistro/raw/master

The corresponding part is modified ：

DEFAULT_INDEX_URL = 'https://gitee.com/openwork2020/rosdistro/raw/master/index-v4.yaml'

6） Protocol Validation

Right click to open the new terminal （ Or shortcut keys ：Ctrl + Alt + T）, Execute the following update command ：

rosdep update

If the following prompt appears , It means that the scheme is effective ！

explain ： I will officially rosdistro Pull project resources to Gitee On , The website is ：https://gitee.com/openwork2020/rosdistro, Welcome to visit , Of course, you can also use your own Gitee Or other third-party hosting platforms .