我在使用Travis从ipython笔记本生成HTML时遇到问题。自动发现失败，出现以下错误。
building [html]: targets for 36 source files that are out of date
updating environment: [new config] 36 added, 0 changed, 0 removed
reading sources... [ 2%] ACC_Analysis
Notebook error:
PandocMissing in ACC_Analysis.ipynb:
Pandoc wasn't found.
Please check that pandoc is installed:
https://pandoc.org/installing.html
Makefile:20: recipe for target 'html' failed
make: *** [html] Error 2
The command "make html" exited with 2.
0.00s$ touch build/html/.nojekyll
The command "touch build/html/.nojekyll" exited with 0.
以下是生成日志：https://travis-ci.com/github/jmscslgroup/strym/builds/183858071
奇怪的是，当我调用make html时，autodoc在我的本地机器上不会失败。
我不知道我需要告诉Travis安装什么依赖项。如果有人有这种问题的经验，请帮助我。谢谢。
我想明白了。我需要在.travis.yml文件中添加以下行：
before_install:
- sudo apt-get -y install pandoc