github actions: cache go modules; disable travis

This is mostly an experiment, but I think it will work well.  GitHub
Actions provides MacOS and Windows builds (though I'm only adding in
Windows at the moment), and cleaner integration.  Builds also seem to be
completing faster than Travis.

.github/workflows/test.yml

@@ -1,18 +0,0 @@
-on: [push, pull_request]
-name: Test
-jobs:
-  test:
-    strategy:
-      matrix:
-        go-version: [1.12.x, 1.13.x]
-        platform: [ubuntu-latest, macos-latest, windows-latest]
-    runs-on: ${{ matrix.platform }}
-    steps:
-    - name: Install Go
-      uses: actions/setup-go@v1
-      with:
-        go-version: ${{ matrix.go-version }}
-    - name: Checkout code
-      uses: actions/checkout@v1
-    - name: Test
-      run: go test ./...

.github/workflows/tests.yml

@@ -0,0 +1,62 @@
+on: [push, pull_request]
+name: tests
+env:
+  GO111MODULE: on
+
+jobs:
+  test:
+    strategy:
+      matrix:
+        go-version: [1.12.x, 1.13.x]
+        platform: [ubuntu-latest]
+    runs-on: ${{ matrix.platform }}
+
+    steps:
+    - uses: actions/setup-go@v1
+      with:
+        go-version: ${{ matrix.go-version }}
+    - uses: actions/checkout@v1
+
+    - name: Cache go modules
+      uses: actions/cache@preview
+      with:
+        path: ~/go/pkg/mod
+        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+        restore-keys: |
+          ${{ runner.os }}-go-
+
+    - name: Run go fmt
+      run: diff -u <(echo -n) <(gofmt -d -s .)
+
+    - name: Run go vet
+      run: go vet ./...
+
+    - name: Run go test
+      run: go test -v -race -coverprofile=coverage.txt -covermode=atomic ./...
+
+    - name: Upload coverage to Codecov
+      uses: codecov/codecov-action@v1.0.3
+      with:
+        token: ${{ secrets.CODECOV_TOKEN }}
+
+  # On Windows, just run the local tests.  Don't bother with checking gofmt, go
+  # vet, or uploading results to Codecov
+  test-windows:
+    strategy:
+      matrix:
+        go-version: [1.12.x, 1.13.x]
+        platform: [windows-latest]
+    runs-on: ${{ matrix.platform }}
+    steps:
+    - uses: actions/setup-go@v1
+      with:
+        go-version: ${{ matrix.go-version }}
+    - uses: actions/checkout@v1
+    - name: Cache go modules
+      uses: actions/cache@preview
+      with:
+        path: ~/go/pkg/mod
+        key: ${{ runner.os }}-go-${{ hashFiles('**\go.sum') }}
+        restore-keys: |
+          ${{ runner.os }}-go-
+    - run: go test ./...

.travis.yml

@@ -1,24 +0,0 @@
-language: go
-
-go:
-  - "1.x"
-  - "1.11.x"
-
-go_import_path: willnorris.com/go/imageproxy
-
-cache:
-  directories:
-    - $HOME/.cache/go-build
-    - $HOME/gopath/pkg/mod
-
-env:
-  global:
-    - GO111MODULE=on
-
-script:
-  - diff -u <(echo -n) <(gofmt -d -s .)
-  - go vet ./...
-  - go test -v -race -coverprofile=coverage.txt -covermode=atomic ./...
-
-after_success:
-    - bash <(curl -s https://codecov.io/bash)

README.md

@@ -1,7 +1,7 @@
 # imageproxy
 
 [![GoDoc](https://godoc.org/willnorris.com/go/imageproxy?status.svg)](https://godoc.org/willnorris.com/go/imageproxy)
-[![Build Status](https://travis-ci.org/willnorris/imageproxy.svg?branch=master)](https://travis-ci.org/willnorris/imageproxy)
+[![Test Status](https://github.com/willnorris/imageproxy/workflows/tests/badge.svg)](https://github.com/willnorris/imageproxy/actions?query=workflow%3Atests)
 [![Test Coverage](https://codecov.io/gh/willnorris/imageproxy/branch/master/graph/badge.svg)](https://codecov.io/gh/willnorris/imageproxy)
 [![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/2611/badge)](https://bestpractices.coreinfrastructure.org/projects/2611)