ROS Melodic rosdep update

环境：

系统：Ubuntu Bionic(18.04.6)
ros: ROS Melodic ( ROS 1 LTS)
Python: 3.6.9
rosdep: 0.21.0

前言

raw.githubusercontent.com的资源访问不稳定，使用https://ghproxy.co…

1. 安装 rosdep

$ sudo apt-get install python3-pip
$ sudo pip install -U rosdep -i https://pypi.tuna.tsinghua.edu.cn/simple
$ rosdep --version
0.21.0

注意以下命令可能删除已经安装的ros基础环境：【不推荐】

sudo apt install python3-rosdep2

2. rosdep init

$ sudo rosdep init

rosdep初始化失败解决办法：

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.

使用代理手动下载到指定位置

$ sudo mkdir -p /etc/ros/rosdep/sources.list.d
$ cd  /etc/ros/rosdep/sources.list.d
$ sudo wget https://ghproxy.com/https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/sources.list.d/20-default.list

内容：

# 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

3. rosdep update

$ rosdep update

rosdep更新失败解决办法：

$ rosdep update
reading in sources list data from /etc/ros/rosdep/sources.list.d
ERROR: unable to process source [https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/osx-homebrew.yaml]:
	<urlopen error [Errno 111] Connection refused> (https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/osx-homebrew.yaml)
ERROR: unable to process source [https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/base.yaml]:
	<urlopen error [Errno 111] Connection refused> (https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/base.yaml)
ERROR: unable to process source [https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/python.yaml]:
	<urlopen error [Errno 111] Connection refused> (https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/python.yaml)
ERROR: unable to process source [https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/ruby.yaml]:
	<urlopen error [Errno 111] Connection refused> (https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/ruby.yaml)
ERROR: unable to process source [https://raw.githubusercontent.com/ros/rosdistro/master/releases/fuerte.yaml]:
	Failed to download target platform data for gbpdistro:
	<urlopen error [Errno 111] Connection refused>
Query rosdistro index https://raw.githubusercontent.com/ros/rosdistro/master/index-v4.yaml
ERROR: error loading sources list:
	<urlopen error <urlopen error [Errno 111] Connection refused> (https://raw.githubusercontent.com/ros/rosdistro/master/index-v4.yaml)>

使用代理修改下载地址

• 修改20-default.list

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

内容

# os-specific listings first
yaml https://ghproxy.com/https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/osx-homebrew.yaml osx

# generic
yaml https://ghproxy.com/https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/base.yaml
yaml https://ghproxy.com/https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/python.yaml
yaml https://ghproxy.com/https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/ruby.yaml
gbpdistro https://ghproxy.com/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python3的__init__.py

sudo gedit /usr/local/lib/python3.6/dist-packages/rosdistro/__init__.py

内容

DEFAULT_INDEX_URL = 'https://raw.githubusercontent.com/ros/rosdistro/master/index-v4.yaml'
修改为
DEFAULT_INDEX_URL = 'https://ghproxy.com/https://raw.githubusercontent.com/ros/rosdistro/master/index-v4.yaml'

• 修改gbpdistro_support.py【解决fuerte.yaml失败问题】

$ sudo gedit /usr/local/lib/python3.6/dist-packages/rosdep2/gbpdistro_support.py

第204行

    try:
    	gbpdistro_url = 'https://ghproxy.com/' + gbpdistro_url
        f = urlopen(gbpdistro_url, timeout=DOWNLOAD_TIMEOUT)

• 其他修改

/usr/local/lib/python3.6/dist-packages/rosdep2/gbpdistro_support.py 36行
/usr/local/lib/python3.6/dist-packages/rosdep2/sources_list.py 72行
/usr/local/lib/python3.6/dist-packages/rosdep2/rep3.py 39行
/usr/local/lib/python3.6/dist-packages/rosdistro/manifest_provider/github.py 68行 119行