Migrate to GitHub Actions CI (#27)

Author: johnthagen

.github/workflows/build.yml

@@ -0,0 +1,55 @@
+name: rust
+
+on: [ push, pull_request ]
+
+jobs:
+  default:
+    name: Default
+    strategy:
+      matrix:
+        platform: [ ubuntu-latest, macos-latest, windows-latest ]
+        toolchain: [ stable, 1.28.0, nightly ]
+    runs-on: ${{ matrix.platform }}
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: ${{ matrix.toolchain }}
+          override: true
+      - uses: actions-rs/cargo@v1
+        with:
+          command: build
+          args: --release --all-features
+  no_std:
+    name: no_std
+    strategy:
+      matrix:
+        toolchain: [ stable, 1.30.0, nightly ]
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: ${{ matrix.toolchain }}
+          override: true
+      - name: Build
+        working-directory: no_std
+        run: cargo build --release --all-features
+  xargo:
+    name: xargo
+    strategy:
+      matrix:
+        project_dir: [ xargo, no_main, panic_immediate_abort]
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: nightly
+          override: true
+      - name: Build
+        working-directory: ${{ matrix.project_dir }}
+        run: >
+          rustup component add rust-src;
+          cargo install xargo --force;
+          xargo build --target x86_64-unknown-linux-gnu --release --verbose;

.travis.yml

@@ -7,7 +7,7 @@ license-file = "LICENSE.txt"
 [dependencies]
 
 [profile.release]
-opt-level = 'z'     # Optimize for size.
+opt-level = "z"     # Optimize for size.
 lto = true          # Enable Link Time Optimization
 codegen-units = 1   # Reduce number of codegen units to increase optimizations.
-panic = 'abort'     # Abort on panic
+panic = "abort"     # Abort on panic

Cargo.toml

@@ -1,8 +1,8 @@
 # Minimizing Rust Binary Size
 
-| Build Status |                                                                                |
-|--------------|--------------------------------------------------------------------------------|
-| Travis       | [![Travis Build Status][travis-build-status-svg]][travis-build-status]         |
+[![GitHub Actions][github-actions-badge]](https://github.com/johnthagen/min-sized-rust/actions)
+
+[github-actions-badge]: https://github.com/johnthagen/min-sized-rust/workflows/build/badge.svg
 
 This repository demonstrates how to minimize the size of a Rust binary.
 
@@ -70,7 +70,7 @@ which optimizes the binary for **speed**. To instruct Cargo to optimize for mini
 
 ```toml
 [profile.release]
-opt-level = 'z'  # Optimize for size.
+opt-level = "z"  # Optimize for size.
 ```
 
 # Enable Link Time Optimization (LTO)
@@ -142,7 +142,7 @@ Enable this in `Cargo.toml`:
 
 ```toml
 [profile.release]
-panic = 'abort'
+panic = "abort"
 ```
 
 # Optimize `libstd` with Xargo
@@ -242,9 +242,9 @@ If you want an executable smaller than 20 kilobytes, Rust's string formatting co
 be removed. `panic_immediate_abort` only removes some usages of this code. There is a lot of other 
 code that uses formatting in some of cases. That includes Rust's "pre-main" code in `libstd`.
 
-By using a C entry point (by added the `#![no_main]` attribute) , managing stdio manually, and 
+By using a C entry point (by adding the `#![no_main]` attribute) , managing stdio manually, and 
 carefully analyzing which chunks of code you or your dependencies include, you can sometimes 
-make use of `libstd ` while avoiding bloated `core::fmt`.
+make use of `libstd` while avoiding bloated `core::fmt`.
 
 Expect the code to be hacky and unportable, with more `unsafe{}`s than usual. It feels like 
 `no_std`, but with `libstd`.

README.md

@@ -11,10 +11,10 @@ license = "MIT"
 # This isn't required for development builds, but makes development
 # build behavior match release builds. To enable unwinding panics
 # during development, simply remove this line.
-panic = 'abort'
+panic = "abort"
 
 [profile.release]
 opt-level = "z"
 lto = true
 codegen-units = 1
-panic = 'abort'
+panic = "abort"

no_main/Cargo.toml

@@ -2,7 +2,6 @@
 name = "min-sized-no_std"
 version = "0.1.0"
 authors = ["johnthagen <johnthagen@gmail.com>"]
-edition = "2018"
 license = "MIT"
 
 [dependencies]
@@ -13,7 +12,7 @@ libc = { version = "0.2", default-features = false }
 panic = "abort"
 
 [profile.release]
-opt-level = 'z'     # Optimize for size.
+opt-level = "z"     # Optimize for size.
 lto = true          # Enable Link Time Optimization
 codegen-units = 1   # Reduce number of codegen units to increase optimizations.
-panic = 'abort'     # Abort on panic
+panic = "abort"     # Abort on panic

no_std/.cargo/config

@@ -11,10 +11,10 @@ license = "MIT"
 # This isn't required for development builds, but makes development
 # build behavior match release builds. To enable unwinding panics
 # during development, simply remove this line.
-panic = 'abort'
+panic = "abort"
 
 [profile.release]
 opt-level = "z"
 lto = true
 codegen-units = 1
-panic = 'abort'
+panic = "abort"

no_std/Cargo.toml

@@ -11,10 +11,10 @@ license = "MIT"
 # This isn't required for development builds, but makes development
 # build behavior match release builds. To enable unwinding panics
 # during development, simply remove this line.
-panic = 'abort'     # Abort on panic
+panic = "abort"     # Abort on panic
 
 [profile.release]
-opt-level = 'z'     # Optimize for size.
+opt-level = "z"     # Optimize for size.
 lto = true          # Enable Link Time Optimization
 codegen-units = 1   # Reduce number of codegen units to increase optimizations.
-panic = 'abort'     # Abort on panic
+panic = "abort"     # Abort on panic