Solutions.md

Solutions of Lecture 8

1. Most makefiles provide a target called clean. This isn't intended to produce a file called clean, but instead to clean up any files that can be re-built by make. Think of it as a way to "undo" all of the build steps. Implement a clean target for the paper.pdf Makefile above. You will have to make the target phony. You may find the git ls-files subcommand useful. A number of other very common make targets are listed here.
2. Take a look at the various ways to specify version requirements for dependencies in Rust's build system. Most package repositories support similar syntax. For each one (caret, tilde, wildcard, comparison, and multiple), try to come up with a use-case in which that particular kind of requirement makes sense.
3. Git can act as a simple CI system all by itself. In .git/hooks inside any git repository, you will find (currently inactive) files that are run as scripts when a particular action happens. Write a pre-commit hook that runs make paper.pdf and refuses the commit if the make command fails. This should prevent any commit from having an unbuildable version of the paper.
4. Set up a simple auto-published page using GitHub Pages. Add a GitHub Action to the repository to run shellcheck on any shell files in that repository (here is one way to do it). Check that it works!
5. Build your own GitHub action to run proselint or write-good on all the .md files in the repository. Enable it in your repository, and check that it works by filing a pull request with a typo in it.