@小鱼 解决办法很有效! 没想到这么快就能有回复，非常感谢，我这也算是做了点贡献了。

$ rosdepc update --include-eol-distros

欢迎使用国内版rosdep之rosdepc，我是作者小鱼！
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小鱼rosdepc正式为您服务

reading in sources list data from /etc/ros/rosdep/sources.list.d
Hit https://mirrors.tuna.tsinghua.edu.cn/github-raw/ros/rosdistro/master/rosdep/osx-homebrew.yaml
Hit https://mirrors.tuna.tsinghua.edu.cn/github-raw/ros/rosdistro/master/rosdep/base.yaml
Hit https://mirrors.tuna.tsinghua.edu.cn/github-raw/ros/rosdistro/master/rosdep/python.yaml
Hit https://mirrors.tuna.tsinghua.edu.cn/github-raw/ros/rosdistro/master/rosdep/ruby.yaml
Query rosdistro index https://mirrors.tuna.tsinghua.edu.cn/rosdistro/index-v4.yaml
Skip end-of-life distro "ardent"
Skip end-of-life distro "bouncy"
Skip end-of-life distro "crystal"
Skip end-of-life distro "dashing"
Skip end-of-life distro "eloquent"
Add distro "foxy"
Skip end-of-life distro "galactic"
Skip end-of-life distro "groovy"
Add distro "humble"
Skip end-of-life distro "hydro"
Skip end-of-life distro "indigo"
Skip end-of-life distro "jade"
Skip end-of-life distro "kinetic"
Skip end-of-life distro "lunar"
Add distro "melodic"
Add distro "noetic"
Add distro "rolling"
updated cache in /home/dchao/.ros/rosdep/sources.cache

小鱼恭喜：rosdepc已为您完成更新!!
如果在上述更新中遇到错误,请查看rosdepc常见错误解决方案:https://fishros.org.cn/forum/topic/676

如果在使用过程中遇到任何问题，欢迎通过fishros.org.cn反馈，最后加入QQ交流群 686914208(入群口令：一键安装)