feat(no_std): make the crate no-std

.github/workflows/ci.yml

@@ -79,3 +79,54 @@ jobs:
         run: cargo test --locked --lib --features epd-weact
       - name: Cache Cargo dependencies
         uses: Swatinem/rust-cache@v2
+
+  build-no-std:
+    name: build [no-std] ${{ matrix.target }} ${{ matrix.toolchain }}
+    strategy:
+      fail-fast: false
+      matrix:
+        target:
+          - arm-unknown-linux-gnueabi
+          - armv7-unknown-linux-gnueabihf
+          - x86_64-unknown-linux-gnu
+          - x86_64-unknown-linux-musl
+          - thumbv7em-none-eabi
+          - thumbv7em-none-eabihf
+          - thumbv7m-none-eabi
+          # no alloc::sync, required by kasuari
+          # - thumbv6m-none-eabi
+          # - riscv32imc-unknown-none-elf # esp32c2, esp32c3
+          # - riscv32imac-unknown-none-elf # esp32c6, esp32h2
+        toolchain: [ "1.85.0", "stable" ]
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: ${{ matrix.toolchain }}
+          target: ${{ matrix.target }}
+          components:
+      - uses: Swatinem/rust-cache@v2
+      - run: cargo build --release --target ${{ matrix.target }}
+
+  build-espidf-std:
+    name: build [std] ${{ matrix.target }}
+    strategy:
+      fail-fast: false
+      matrix:
+        target:
+          - riscv32imc-esp-espidf # esp32c2, esp32c3
+          - riscv32imac-esp-espidf # esp32c6, esp32h2
+          - xtensa-esp32-espidf
+          - xtensa-esp32s2-espidf
+          - xtensa-esp32s3-espidf
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: esp-rs/[email protected]
+        with:
+          default: true
+          ldproxy: true
+          buildtargets: 'esp32,esp32s2,esp32s3,esp32c2,esp32c3,esp32c6,esp32h2'
+      - uses: Swatinem/rust-cache@v2
+      - run: cargo build --release --features=std --target ${{ matrix.target }} -Zbuild-std=std,panic_abort -Zbuild-std-features=panic_immediate_abort

Cargo.toml

@@ -12,18 +12,21 @@ categories = ["embedded"]
 exclude=["/.github", "/assets"]
 
 [dependencies]
-ratatui = { version = "0.29", default-features = false, features = ["all-widgets"] }
+ratatui-core = { version = "0.1.0-alpha.5", features = ["underline-color"]}
+thiserror = { version = "2.0.12", default-features = false }
 embedded-graphics = "0.8.1"
 embedded-graphics-simulator = { version = "0.7.0", optional = true }
 embedded-graphics-unicodefonts = { version = "0.1.0", optional = true }
 weact-studio-epd = { version = "0.1.2", features = ["blocking"], optional = true }
 
 [dev-dependencies]
+ratatui = { version = "0.30.0-alpha.4", default-features = false }
 rstest = "0.25.0"
 paste = "1.0.15"
 
 [features]
 default = ["fonts"]
+std = ["thiserror/std", "ratatui-core/std"]
 simulator = ["dep:embedded-graphics-simulator"]
 fonts = ["dep:embedded-graphics-unicodefonts"]
 epd-weact = ["dep:weact-studio-epd"]

examples/simulator.rs

@@ -1,10 +1,12 @@
 //! Example using a simulator.
 use mousefood::embedded_graphics::geometry;
+use mousefood::error::Error;
 use mousefood::prelude::*;
-use mousefood::ratatui::widgets::{Block, Paragraph, Wrap};
 use mousefood::simulator::SimulatorDisplay;
+use ratatui::widgets::{Block, Paragraph, Wrap};
+use ratatui::{Frame, Terminal, style::*};
 
-fn main() -> Result<(), std::io::Error> {
+fn main() -> Result<(), Error> {
     let mut display = SimulatorDisplay::<Bgr565>::new(geometry::Size::new(128, 64));
     let backend: EmbeddedBackend<SimulatorDisplay<_>, _> =
         EmbeddedBackend::new(&mut display, EmbeddedBackendConfig::default());