Switch from Travis to Github Actions for CI (#23)

Author: bovine

.github/workflows/linux-ci.yml

@@ -0,0 +1,30 @@
+name: Linux CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Install dependencies
+      run: |
+        sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
+        sudo apt-get update -qq
+        sudo apt-get install -y gcc-7 g++-7
+        sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-7 70 --slave /usr/bin/g++ g++ /usr/bin/g++-7
+        sudo apt-get install -y tcl8.6-dev
+    - name: make
+      run: make
+    - name: install
+      run: sudo make install
+    - name: make test
+      run: make test
+    - name: make examples
+      run: make examples

.github/workflows/mac-ci.yml

@@ -0,0 +1,32 @@
+name: Mac CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: macos-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Install dependencies
+      run: |
+        brew update
+        brew install tcl-tk || true
+        sudo mkdir -p /usr/local
+        sudo ln -sf /usr/local/opt/tcl-tk/include /usr/local/include/tcl8.6
+        sudo cp /usr/local/opt/tcl-tk/lib/libtcl* /usr/local/lib
+        sudo ln -sf /usr/local/opt/tcl-tk/bin/tclsh8.6 /usr/local/bin/tclsh
+        sudo ln -sf /usr/local/opt/tcl-tk/bin/tclsh8.6 /usr/local/bin/tclsh8.6
+    - name: make
+      run: make
+    - name: install
+      run: sudo make install
+    - name: make test
+      run: make test
+    - name: make examples
+      run: make examples

.travis.yml

@@ -1,4 +1,5 @@
-[![Build Status](https://travis-ci.org/flightaware/cpptcl.svg?branch=master)](https://travis-ci.org/flightaware/cpptcl)
+![Linux CI](https://github.com/flightaware/cpptcl/workflows/Linux%20CI/badge.svg)
+![Mac CI](https://github.com/flightaware/cpptcl/workflows/Mac%20CI/badge.svg)
 
 C++/Tcl - a C++ library for interoperability between C++ and Tcl.
 ========