Use Nix

.github/dependabot.yaml

@@ -0,0 +1,7 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      # Check for updates to GitHub Actions every week
+      interval: "weekly"

.github/workflows/build-attiny85.yaml

@@ -0,0 +1,47 @@
+name: Build ATtiny85
+
+"on":
+  pull_request:
+    branches: ["main"]
+    paths:
+      - .github/workflows/build-attiny85.yaml
+      - boards/attiny85/flake.lock
+      - boards/attiny85/flake.nix
+      - boards/attiny85/.cargo/**
+      - boards/attiny85/.justfile
+      - boards/attiny85/src/**
+      - boards/attiny85/avr-unknown-none-attiny85.json
+      - boards/attiny85/Cargo.lock
+      - boards/attiny85/Cargo.toml
+      - boards/attiny85/rust-toolchain.toml
+  push:
+    branches: ["main"]
+    paths:
+      - .github/workflows/build-attiny85.yaml
+      - boards/attiny85/flake.lock
+      - boards/attiny85/flake.nix
+      - boards/attiny85/.cargo/**
+      - boards/attiny85/.justfile
+      - boards/attiny85/src/**
+      - boards/attiny85/avr-unknown-none-attiny85.json
+      - boards/attiny85/Cargo.lock
+      - boards/attiny85/Cargo.toml
+      - boards/attiny85/rust-toolchain.toml
+  workflow_dispatch:
+
+jobs:
+  build-attiny85:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: DeterminateSystems/nix-installer-action@v14
+      - uses: DeterminateSystems/magic-nix-cache-action@v8
+      - name: Build
+        run: cd boards/attiny85; nix develop --command just build release
+      - name: Upload firmware
+        uses: actions/upload-artifact@v4
+        with:
+          name: attiny85-pwm-fan-controller
+          path: |
+            target/avr-unknown-none-attiny85/release/attiny85-pwm-fan-controller.elf
+            attiny85-pwm-fan-controller.hex

.github/workflows/cargo-lock-updater.yaml

@@ -0,0 +1,30 @@
+name: Cargo Lock Updater
+
+"on":
+  schedule:
+    # Once a month on the 5th
+    - cron: "0 0 5 * *"
+  workflow_dispatch:
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  cargo-lock-updater:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: DeterminateSystems/nix-installer-action@v14
+      - uses: DeterminateSystems/magic-nix-cache-action@v8
+      - name: Update ATtiny85 Cargo lock file
+        run: cd boards/attiny85; nix develop --command cargo update
+      - name: Update Pico Cargo lock file
+        run: cd boards/pico; nix develop --command cargo update
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v7
+        with:
+          assignees: ${{ github.repository_owner }}
+          branch: "update/cargo-lock"
+          commit-message: "chore(deps): Update Cargo lock files"
+          title: "chore(deps): Update Cargo lock files"

.github/workflows/clippy-attiny85.yaml

@@ -0,0 +1,18 @@
+name: Lint Rust code with Clippy
+"on":
+  pull_request:
+    branches: ["main"]
+    paths:
+      - .github/workflows/clippy-attiny85.yaml
+      - boards/attiny85/flake.lock
+      - boards/attiny85/**.rs
+
+jobs:
+  clippy-attiny85:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: DeterminateSystems/nix-installer-action@v14
+      - uses: DeterminateSystems/magic-nix-cache-action@v8
+      - name: Lint Rust code with Clippy
+        run: cd boards/attiny85; nix develop --command cargo clippy

.github/workflows/flake-checker.yaml

@@ -0,0 +1,14 @@
+name: Check Nix Flake
+"on":
+  pull_request:
+    branches: ["main"]
+    paths:
+      - .github/workflows/flake-checker.yaml
+      - '**/flake.lock'
+
+jobs:
+  flake-checker:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: DeterminateSystems/flake-checker-action@v9

.github/workflows/flake-lock-updater.yaml

@@ -0,0 +1,25 @@
+name: Flake ❄️ Lock 🔒️ Updater ✨
+
+"on":
+  schedule:
+    # Pi o'clock
+    - cron: '3 14 * * 1,5'
+  workflow_dispatch:
+
+jobs:
+  lock-updater:
+    name: Flake Lock Updater
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: DeterminateSystems/nix-installer-action@v14
+      - uses: DeterminateSystems/magic-nix-cache-action@v8
+      - uses: DeterminateSystems/update-flake-lock@v24
+        with:
+          pr-title: "chore: update flake.lock"
+          # Labels to be set on the PR
+          pr-labels: |
+            dependencies
+            automated

.github/workflows/format-just.yaml

@@ -0,0 +1,19 @@
+name: Format justfiles
+"on":
+  pull_request:
+    branches: ["main"]
+    paths:
+      - .github/workflows/format-just.yaml
+      - '**/flake.lock'
+      - '**/.justfile'
+      - '**/justfile'
+
+jobs:
+  format-just:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: DeterminateSystems/nix-installer-action@v14
+      - uses: DeterminateSystems/magic-nix-cache-action@v8
+      - name: Format justfile
+        run: cd boards/attiny85; nix develop --command just --check --fmt --unstable ../..

.github/workflows/pre-commit-autoupdate.yaml

@@ -0,0 +1,30 @@
+name: Pre-commit auto-update
+
+"on":
+  schedule:
+    # Once a month on the 2nd
+    - cron: "0 0 2 * *"
+  workflow_dispatch:
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  pre-commit-autoupdate:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: DeterminateSystems/nix-installer-action@v14
+      - uses: DeterminateSystems/magic-nix-cache-action@v8
+      - name: Update pre-commit hooks
+        run: nix develop --command pre-commit autoupdate
+      - name: Run pre-commit hooks
+        run: nix develop --command pre-commit run --all-files
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v7
+        with:
+          assignees: ${{ github.repository_owner }}
+          branch: "update/pre-commit-hooks"
+          commit-message: "chore(deps): Update pre-commit hooks"
+          title: "chore(deps): Update pre-commit hooks"

.github/workflows/rustfmt.yaml

@@ -0,0 +1,18 @@
+name: Format Rust code
+"on":
+  pull_request:
+    branches: ["main"]
+    paths:
+      - .github/workflows/rustfmt.yaml
+      - '**/flake.lock'
+      - '**.rs'
+
+jobs:
+  rustfmt:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: DeterminateSystems/nix-installer-action@v14
+      - uses: DeterminateSystems/magic-nix-cache-action@v8
+      - name: Check Rust formatting
+        run: cd boards/attiny85; nix develop --command nu --commands 'rustfmt --check ../../**/*.rs'

.github/workflows/yamllint.yaml

@@ -0,0 +1,20 @@
+name: yamllint
+"on":
+  pull_request:
+    branches: ["main"]
+    paths:
+      - .github/workflows/yamllint.yaml
+      - .yamllint.yaml
+      - '**/flake.lock'
+      - '**.yaml'
+      - '**.yml'
+
+jobs:
+  yamllint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: DeterminateSystems/nix-installer-action@v14
+      - uses: DeterminateSystems/magic-nix-cache-action@v8
+      - name: Check YAML files
+        run: cd boards/attiny85; nix develop --command yamllint --format github ../..

.gitignore

@@ -15,6 +15,13 @@ target/
 
 # Ignore any built binaries.
 *.bin
+*.hex
 
 *.jpg~
 *.jpg-autosave.kra
+
+# direnv
+.direnv/
+
+# Nix
+result/

.pre-commit-config.yaml

@@ -0,0 +1,60 @@
+exclude: |
+  (?x)^(
+    .idea/.*|
+    .run/.*|
+    .vscode/.*
+  )$
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.6.0
+    hooks:
+      - id: check-byte-order-marker
+      - id: check-executables-have-shebangs
+      - id: check-json
+      - id: check-merge-conflict
+      - id: check-toml
+      - id: check-yaml
+        args: [--allow-multiple-documents]
+      - id: end-of-file-fixer
+      - id: mixed-line-ending
+      - id: pretty-format-json
+        args: ["--autofix"]
+        exclude: ^.vscode/.*\.json$
+      - id: trailing-whitespace
+  - repo: local
+    hooks:
+      - id: just
+        entry: just --fmt --unstable
+        files: |
+          (?x)^(
+            .justfile|
+            justfile
+          )$
+        language: system
+        name: just
+        pass_filenames: false
+      - id: rustfmt
+        name: rustfmt
+        description: Format Rust files with rustfmt.
+        entry: rustfmt
+        pass_filenames: true
+        types: [file, rust]
+        language: system
+      - id: rust-clippy-attiny85
+        name: Rust clippy ATtiny85
+        description: Run cargo clippy on files included in the commit.
+        entry: cargo -C boards/attiny85 clippy --all-targets --all-features -- -Dclippy::all
+        pass_filenames: false
+        types: [file, rust]
+        language: system
+      # - id: rust-clippy-pico
+      #   name: Rust clippy Pico
+      #   description: Run cargo clippy on files included in the commit.
+      #   entry: cargo -C boards/pico clippy --all-targets --all-features -- -Dclippy::all
+      #   pass_filenames: false
+      #   types: [file, rust]
+      #   language: system
+  - repo: https://github.com/adrienverge/yamllint.git
+    rev: v1.35.1
+    hooks:
+      - id: yamllint

.vscode/settings.json

@@ -6,16 +6,22 @@
         "Asciidoctor",
         "assumeyes",
         "attiny",
+        "autofix",
         "avrdude",
         "binutils",
         "BOOTSEL",
         "Boxall",
+        "clippy",
         "Datasheet",
+        "Dclippy",
         "devel",
+        "dialout",
         "eabi",
+        "getent",
         "ifdef",
         "ifndef",
         "ihex",
+        "justfile",
         "Libc",
         "libusbx",
         "microcontroller",
@@ -30,6 +36,7 @@
         "Pinouts",
         "proto",
         "Protoboard",
+        "rustfmt",
         "rustup",
         "SWCLK",
         "SWDIO",
@@ -38,6 +45,7 @@
         "tlsv",
         "UART",
         "udev",
+        "usermod",
         "VBUS"
     ]
 }

.yamllint.yaml

@@ -0,0 +1,6 @@
+extends: default
+
+rules:
+  document-start: disable
+  document-end: disable
+  line-length: disable

boards/attiny85/.cargo/config.toml

@@ -1,9 +1,9 @@
 [build]
-target = "avr-specs/avr-attiny85.json"
+target = "avr-unknown-none-attiny85.json"
 
 #[target.'cfg(target_arch = "avr")']
 # ravedude doesn't support running from an AVR USB programmer like the USB uISP without code modifications.
-#runner = "ravedude trinket"
+# runner = "ravedude attiny85-usbtiny"
 
 [unstable]
 build-std = ["core"]

boards/attiny85/.envrc

@@ -0,0 +1 @@
+use flake