Set up reusable CI workflow and add building doctests

.github/CODEOWNERS

@@ -0,0 +1 @@
+* @rust3ds/active

.github/actions/setup/action.yml

@@ -0,0 +1,48 @@
+name: Setup
+description: Set up CI environment for Rust + 3DS development
+
+inputs:
+  toolchain:
+    description: The Rust toolchain to use for the steps
+    required: true
+    default: nightly
+
+runs:
+  using: composite
+  steps:
+    # https://github.com/nektos/act/issues/917#issuecomment-1074421318
+    - if: ${{ env.ACT }}
+      shell: bash
+      name: Hack container for local development
+      run: |
+          curl -fsSL https://deb.nodesource.com/setup_lts.x | sudo -E bash -
+          sudo apt-get install -y nodejs
+
+    - name: Setup default Rust toolchain
+      # Use this helper action so we get matcher support
+      # https://github.com/actions-rust-lang/setup-rust-toolchain/pull/15
+      uses: actions-rust-lang/setup-rust-toolchain@v1
+      with:
+        components: clippy, rustfmt, rust-src
+        toolchain: ${{ inputs.toolchain }}
+
+    - name: Install build tools for host
+      shell: bash
+      run: sudo apt-get update && sudo apt-get install -y build-essential
+
+    - name: Install cargo-3ds
+      uses: actions-rs/cargo@v1
+      with:
+        command: install
+        # TODO: this should probably just be a released version from crates.io
+        # once cargo-3ds gets published somewhere...
+        #
+        # also switch to master hash once feature/doctests gets merged
+        args: >-
+          --git https://github.com/rust3ds/cargo-3ds
+          --rev 5a06e64307499ffe681453e7d88d7ee986054eb7
+
+    - name: Set PATH to include devkitARM
+      shell: bash
+      # For some reason devkitARM/bin is not part of the default PATH in the container
+      run: echo "${DEVKITARM}/bin" >> $GITHUB_PATH

.github/workflows/ci.yml

@@ -12,6 +12,8 @@ on:
 env:
   # https://blog.rust-lang.org/2022/06/22/sparse-registry-testing.html
   CARGO_UNSTABLE_SPARSE_REGISTRY: "true"
+  # actions-rust-lang/setup-rust-toolchain sets some default RUSTFLAGS
+  RUSTFLAGS: ""
 
 jobs:
   lint:
@@ -22,41 +24,24 @@ jobs:
           - nightly-2023-01-13
           # Check for breakage on latest nightly
           - nightly
+
     # But if latest nightly fails, allow the workflow to continue
     continue-on-error: ${{ matrix.toolchain == 'nightly' }}
     runs-on: ubuntu-latest
     container: devkitpro/devkitarm
     steps:
-      # https://github.com/nektos/act/issues/917#issuecomment-1074421318
-      - if: ${{ env.ACT }}
-        name: Hack container for local development
-        run: |
-            curl -fsSL https://deb.nodesource.com/setup_lts.x | sudo -E bash -
-            sudo apt-get install -y nodejs
-
       - name: Checkout branch
         uses: actions/checkout@v2
 
-      - name: Setup default Rust toolchain
-        uses: actions-rs/toolchain@v1
+      - uses: ./.github/actions/setup
         with:
-          components: clippy, rustfmt, rust-src
-          profile: minimal
           toolchain: ${{ matrix.toolchain }}
-          default: true
 
-      - name: Install build tools for host
-        run: sudo apt-get update && sudo apt-get install -y build-essential
-
-      - name: Install cargo-3ds
-        uses: actions-rs/cargo@v1
-        with:
-          command: install
-          # TODO: this should probably just be a released version from crates.io
-          # once cargo-3ds gets published somewhere...
-          args: >-
-            --git https://github.com/rust3ds/cargo-3ds
-            --rev 7b70b6b26c4740b9a10ab85b832ee73c41142bbb
+      - name: Hide duplicate warnings from lint job
+        if: ${{ matrix.toolchain == 'nightly' }}
+        run: |
+          echo "::remove-matcher owner=clippy::"
+          echo "::remove-matcher owner=rustfmt::"
 
       - name: Check formatting
         run: cargo fmt --all --verbose -- --check
@@ -68,5 +53,28 @@ jobs:
         # feature, but https://github.com/actions/runner/issues/2341 means we
         # can't have both that *and* colored output.
 
+  doctests:
+    strategy:
+      matrix:
+        toolchain:
+          - nightly-2023-01-13
+          - nightly
+    continue-on-error: ${{ matrix.toolchain == 'nightly' }}
+    runs-on: ubuntu-latest
+    container: devkitpro/devkitarm
+    steps:
+      - name: Checkout branch
+        uses: actions/checkout@v2
+
+      - uses: ./.github/actions/setup
+        with:
+          toolchain: ${{ matrix.toolchain }}
+
+      - name: Hide duplicated warnings from lint job
+        run: echo "::remove-matcher owner=clippy::"
+
+      - name: Build doc tests
+        run: cargo 3ds test --doc --verbose
+
   # TODO: it would be nice to actually build 3dsx for examples/tests, etc.
   # and run it somehow, but exactly how remains to be seen.

ctru-rs/src/services/fs.rs

@@ -123,6 +123,9 @@ pub struct Archive {
 /// Create a new file and write bytes to it:
 ///
 /// ```no_run
+/// # use std::error::Error;
+/// # fn main() -> Result<(), Box<dyn Error>> {
+/// #
 /// use std::io::prelude::*;
 /// use ctru::services::fs::{Fs, File};
 ///
@@ -131,11 +134,17 @@ pub struct Archive {
 ///
 /// let mut file = File::create(&sdmc, "/foo.txt")?;
 /// file.write_all(b"Hello, world!")?;
+/// #
+/// # Ok(())
+/// # }
 /// ```
 ///
 /// Read the contents of a file into a `String`::
 ///
 /// ```no_run
+/// # use std::error::Error;
+/// # fn main() -> Result<(), Box<dyn Error>> {
+/// #
 /// use std::io::prelude::*;
 /// use ctru::services::fs::{Fs, File};
 ///
@@ -146,12 +155,18 @@ pub struct Archive {
 /// let mut contents = String::new();
 /// file.read_to_string(&mut contents)?;
 /// assert_eq!(contents, "Hello, world!");
+/// #
+/// # Ok(())
+/// # }
 /// ```
 ///
 /// It can be more efficient to read the contents of a file with a buffered
 /// `Read`er. This can be accomplished with `BufReader<R>`:
 ///
 /// ```no_run
+/// # use std::error::Error;
+/// # fn main() -> Result<(), Box<dyn Error>> {
+/// #
 /// use std::io::BufReader;
 /// use std::io::prelude::*;
 /// use ctru::services::fs::{Fs, File};
@@ -164,6 +179,9 @@ pub struct Archive {
 /// let mut contents = String::new();
 /// buf_reader.read_to_string(&mut contents)?;
 /// assert_eq!(contents, "Hello, world!");
+/// #
+/// # Ok(())
+/// # }
 /// ```
 pub struct File {
     handle: u32,