Use a setup-mdbook action

.github/workflows/build-and-test.yml

@@ -33,5 +33,9 @@ jobs:
     - name: Install gbafix
       run: cargo install gbafix
     - uses: extractions/setup-just@v1
+    - name: Setup mdBook
+      uses: peaceiris/actions-mdbook@v1
+      with:
+        mdbook-version: '0.4.13'
     - name: Build and test all crates
       run: just ci

.github/workflows/build-book.yml

@@ -1,38 +0,0 @@
-name: Build book
-
-on:
-  push:
-    branches: [ master ]
-    paths:
-      'book/**'
-  pull_request:
-    branches: [ master ]
-    paths:
-      'book/**'
-
-env:
-  CARGO_TERM_COLOR: always
-
-jobs:
-  build:
-    runs-on: ubuntu-20.04
-    steps:
-    - name: Set CARGO_TARGET_DIR
-      run: echo "CARGO_TARGET_DIR=$HOME/target" >> $GITHUB_ENV
-    - name: Install build tools
-      run: sudo apt-get update && sudo apt-get install build-essential binutils-arm-none-eabi libelf-dev zip -y
-    - uses: actions/checkout@v3
-    - name: Cache
-      uses: actions/cache@v2.1.7
-      with:
-        path: |
-          ~/.cargo/registry
-          ~/.cargo/git
-          ~/target
-        key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
-
-    - name: Install mdbook
-      run: cargo install mdbook
-    - name: Build the book
-      run: mdbook build
-      working-directory: book

.github/workflows/publish-agb.yml

@@ -38,8 +38,10 @@ jobs:
           tag: ${{ github.ref }}
           overwrite: true
 
-      - name: Install mdbook
-        run: cargo install mdbook
+      - name: Setup mdBook
+        uses: peaceiris/actions-mdbook@v1
+        with:
+          mdbook-version: '0.4.13'
       - name: Build the book
         run: just build-book
       - name: Deploy the book