add markdownlint and run lychee in documentation CI workflow

Signed-off-by: strawberry <strawberry@puppygock.gay>

.editorconfig

@@ -11,5 +11,10 @@ indent_style = space
 insert_final_newline = true
 max_line_length = 120
 
+[*.{md,txt}]
+indent_style = space
+indent_size = 4
+max_line_length = 80
+
 [*.nix]
 indent_size = 2

.github/workflows/documentation.yml

@@ -106,6 +106,11 @@ jobs:
         run: |
             bin/nix-build-and-cache ci
 
+      - name: Run lychee and markdownlint
+        run: |
+            direnv exec . engage just lints lychee
+            direnv exec . engage just lints markdownlint
+
       - name: Build documentation (book)
         run: |
           ./bin/nix-build-and-cache just .#book

.markdownlintignore

@@ -0,0 +1 @@
+.gitignore

CONTRIBUTING.md

@@ -37,6 +37,7 @@ The following binaries are used in [`engage.toml`][engage.toml]:
 - [`cargo-audit`][cargo-audit]
 - [`cargo-deb`][cargo-deb]
 - [`lychee`][lychee]
+- [`markdownlint-cli`][markdownlint-cli]
 
 ### Matrix tests
 
@@ -86,6 +87,7 @@ By sending a pull request or patch, you are agreeing that your changes are allow
 [sytest]: https://github.com/matrix-org/sytest/
 [cargo-deb]: https://github.com/kornelski/cargo-deb
 [lychee]: https://github.com/lycheeverse/lychee
+[markdownlint-cli]: https://github.com/igorshubovych/markdownlint-cli
 [cargo-audit]: https://github.com/RustSec/rustsec/tree/main/cargo-audit
 [direnv]: https://direnv.net/
 [mdbook]: https://rust-lang.github.io/mdBook/

engage.toml

@@ -55,6 +55,11 @@ name = "lychee"
 group = "versions"
 script = "lychee --version"
 
+[[task]]
+name = "markdownlint"
+group = "versions"
+script = "markdownlint --version"
+
 [[task]]
 name = "cargo-audit"
 group = "security"
@@ -138,6 +143,11 @@ name = "lychee"
 group = "lints"
 script = "lychee --verbose --offline docs *.md --exclude development.md"
 
+[[task]]
+name = "markdownlint"
+group = "lints"
+script = "markdownlint docs *.md"
+
 [[task]]
 name = "cargo/all"
 group = "tests"

flake.nix

@@ -108,6 +108,9 @@
           # Needed for finding broken markdown links
           lychee
 
+          # Needed for linting markdown files
+          markdownlint-cli
+
           # Useful for editing the book locally
           mdbook
         ])