refactor: split CI into reusable workflows (#1)

* refactor: split CI into reusable workflows

- verify.yml: fmt and clippy checks
- test.yml: cargo test on Linux/macOS/Windows
- build.yml: release build with artifact upload
- main.yml: orchestrator with dependencies

Flow: verify -> test -> build

* refactor: use rust containers, rename to Main, fix fmt

- Use rust:1.75-slim container for Ubuntu jobs (lighter)
- Keep dtolnay/rust-toolchain for macOS/Windows
- Rename workflow from CI to Main
- Fix cargo fmt in tests/error_handling.rs

* refactor: use dedicated jobs per OS instead of matrix

- test.yml: explicit test-linux, test-macos, test-windows jobs
- build.yml: explicit build-linux, build-macos, build-windows jobs
- Remove matrix strategy and OS conditionals
- Cleaner, easier to maintain

* style: capitalize workflow and job names

- Verify / Format, Verify / Clippy
- Test / Linux, Test / macOS, Test / Windows
- Build / Linux, Build / macOS, Build / Windows

* refactor: lowercase job names, capitalize workflow names

Job names: linux, macos, windows (under their workflows)
Workflow names: Verify, Test, Build (in main.yml)

* chore: trigger CI

Author: clawdeeo

.github/workflows/build.yml

@@ -0,0 +1,45 @@
+name: Build
+
+on:
+  workflow_call:
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  linux:
+    name: Linux
+    runs-on: ubuntu-latest
+    container: rust:1.75-slim
+    steps:
+      - uses: actions/checkout@v4
+      - run: apt-get update && apt-get install -y pkg-config libssl-dev
+      - run: cargo build --release
+      - uses: actions/upload-artifact@v4
+        with:
+          name: gitclaw-linux
+          path: target/release/gitclaw
+
+  macos:
+    name: macOS
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@1.75
+      - run: cargo build --release
+      - uses: actions/upload-artifact@v4
+        with:
+          name: gitclaw-macos
+          path: target/release/gitclaw
+
+  windows:
+    name: Windows
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@1.75
+      - run: cargo build --release
+      - uses: actions/upload-artifact@v4
+        with:
+          name: gitclaw-windows
+          path: target/release/gitclaw.exe

.github/workflows/ci.yml

@@ -0,0 +1,19 @@
+name: Main
+
+on:
+  push:
+    branches: [main, master]
+  pull_request:
+    branches: [main, master]
+
+jobs:
+  Verify:
+    uses: ./.github/workflows/verify.yml
+
+  Test:
+    needs: Verify
+    uses: ./.github/workflows/test.yml
+
+  Build:
+    needs: Test
+    uses: ./.github/workflows/build.yml

.github/workflows/main.yml

@@ -0,0 +1,33 @@
+name: Test
+
+on:
+  workflow_call:
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  linux:
+    name: Linux
+    runs-on: ubuntu-latest
+    container: rust:1.75-slim
+    steps:
+      - uses: actions/checkout@v4
+      - run: apt-get update && apt-get install -y pkg-config libssl-dev
+      - run: cargo test
+
+  macos:
+    name: macOS
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@1.75
+      - run: cargo test
+
+  windows:
+    name: Windows
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@1.75
+      - run: cargo test

.github/workflows/test.yml

@@ -0,0 +1,27 @@
+name: Verify
+
+on:
+  workflow_call:
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  Format:
+    name: Format
+    runs-on: ubuntu-latest
+    container: rust:1.75-slim
+    steps:
+      - uses: actions/checkout@v4
+      - run: rustup component add rustfmt
+      - run: cargo fmt --check
+
+  Clippy:
+    name: Clippy
+    runs-on: ubuntu-latest
+    container: rust:1.75-slim
+    steps:
+      - uses: actions/checkout@v4
+      - run: apt-get update && apt-get install -y pkg-config libssl-dev
+      - run: rustup component add clippy
+      - run: cargo clippy -- -D warnings

.github/workflows/verify.yml

@@ -109,7 +109,7 @@ fn test_find_matching_asset_empty_assets() {
 /// Test asset matching with only checksum files
 #[test]
 fn test_find_matching_asset_only_checksums() {
-    use gitclaw::github::{Asset, find_matching_asset, Platform, Release};
+    use gitclaw::github::{find_matching_asset, Asset, Platform, Release};
 
     let release = Release {
         tag_name: "v1.0.0".to_string(),