Add CI (#104)

.github/workflows/build.yml

@@ -0,0 +1,44 @@
+on: [push, pull_request]
+
+jobs:
+  main:
+    strategy:
+      fail-fast: false
+      matrix:
+        job_name: ['linux', 'windows']
+
+        include:
+        - job_name: linux
+          os: ubuntu-latest
+          shell: bash {0}
+
+        - job_name: windows
+          os: windows-latest
+          shell: msys2 {0}
+
+    defaults:
+      run:
+        shell: ${{ matrix.shell }}
+
+    name: hactool-${{ matrix.job_name }}
+    runs-on: ${{ matrix.os }}
+
+    steps:
+    - uses: msys2/setup-msys2@v2
+      if: matrix.os == 'windows-latest'
+      with:
+        path-type: inherit
+        msystem: MINGW64
+        update: true
+        install: mingw-w64-x86_64-gcc mingw-w64-x86_64-make
+
+    - uses: actions/checkout@v1
+
+    - run: |
+        mv config.mk.template config.mk
+        make -j$(nproc)
+
+    - uses: actions/upload-artifact@v2
+      with:
+        name: hactool-${{ matrix.job_name }}
+        path: hactool*