⭐️ alpine binary support (#23)

* Add alpine linux coverage
* ⭐️ alpine binary support
Co-authored-by: Fergus Strange <fergus@sitehive.co>

Author: chris-rock

.github/workflows/build.yml

@@ -53,6 +53,19 @@ jobs:
         env:
           COVERALLS_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: GO111MODULE=off go get github.com/mattn/goveralls && $(go env GOPATH)/bin/goveralls -v -coverprofile=coverage.out -service=github
+  alpine_tests:
+    name: Alpine Linux Platform Tests
+    runs-on: ubuntu-latest
+    container:
+      image: golang:1.13-alpine
+    steps:
+      - uses: actions/checkout@v1
+      - name: Set Up
+        run: |
+          apk add --upgrade gcc g++ && \
+          adduser testuser -D
+      - name: All Tests
+        run: su - testuser -c 'export PATH=$PATH:/usr/local/go/bin; cd /__w/embedded-postgres/embedded-postgres && go test -v ./... && cd platform-test && go test -v ./...'
   platform_tests:
     name: Platform tests
     strategy:

version_strategy.go

@@ -1,13 +1,26 @@
 package embeddedpostgres
 
-import "runtime"
+import (
+	"os"
+	"runtime"
+)
 
 // VersionStrategy provides a strategy that can be used to determine which version of Postgres should be used based on
 // the operating system, architecture and desired Postgres version.
 type VersionStrategy func() (operatingSystem string, architecture string, postgresVersion PostgresVersion)
 
 func defaultVersionStrategy(config Config) VersionStrategy {
 	return func() (operatingSystem, architecture string, version PostgresVersion) {
-		return runtime.GOOS, runtime.GOARCH, config.version
+		goos := runtime.GOOS
+		arch := runtime.GOARCH
+
+		// use alpine specific build
+		if goos == "linux" {
+			if _, err := os.Stat("/etc/alpine-release"); err == nil {
+				arch += "-alpine"
+			}
+		}
+
+		return goos, arch, config.version
 	}
 }