version strategy: zonkio's arm arch name are different from GOOARCH (#25)

* Add CircleCI build for arm64
* version strategy: zonkio's arm arch name are different from GOOARCH
on arm (32bit), use 'uname -m' to get the excact arm version

Co-authored-by: Fergus Strange <[email protected]>

Author: bearsh

.circleci/config.yml

@@ -1,35 +1,27 @@
 version: 2.1
 executors:
-  linux:
-    machine:
-      image: ubuntu-2004:202104-01
-    working_directory: /go/src/github.com/fergusstrange/embedded-postgres
   linux-arm64:
     machine:
       image: ubuntu-2004:202104-01
     resource_class: arm.medium
-    working_directory: /go/src/github.com/fergusstrange/embedded-postgres
-  osx:
-    macos:
-      xcode: 11.4
-    working_directory: /go/src/github.com/fergusstrange/embedded-postgres
+    working_directory: /home/circleci/go/src/github.com/fergusstrange/embedded-postgres
 
 jobs:
   platform_test:
     parameters:
-      os:
+      executor:
         type: executor
     executor: << parameters.executor >>
     steps:
       - checkout
       - restore_cache:
           keys:
-            - embedded-postgres-{{ checksum "/go/src/github.com/fergusstrange/embedded-postgres/go.mod" }}
+            - embedded-postgres-{{ checksum "/home/circleci/go/src/github.com/fergusstrange/embedded-postgres/go.mod" }}
       - run: cd platform-test && go test -v -race ./...
       - save_cache:
-          key: embedded-postgres-{{ checksum "/go/src/github.com/fergusstrange/embedded-postgres/go.mod" }}
+          key: embedded-postgres-{{ checksum "/home/circleci/go/src/github.com/fergusstrange/embedded-postgres/go.mod" }}
           paths:
-            - /go/pkg
+            - /home/circleci/go/pkg
 
 workflows:
   version: 2
@@ -38,4 +30,4 @@ workflows:
       - platform_test:
           matrix:
             parameters:
-              executor: [ linux, linux-arm64, osx ]
+              executor: [ linux-arm64 ]

version_strategy.go

@@ -2,7 +2,9 @@ package embeddedpostgres
 
 import (
 	"os"
+	"os/exec"
 	"runtime"
+	"strings"
 )
 
 // VersionStrategy provides a strategy that can be used to determine which version of Postgres should be used based on
@@ -14,8 +16,24 @@ func defaultVersionStrategy(config Config) VersionStrategy {
 		goos := runtime.GOOS
 		arch := runtime.GOARCH
 
-		// use alpine specific build
 		if goos == "linux" {
+			// the zonkyio/embedded-postgres-binaries project produces
+			// arm binaries with the following name schema:
+			// 32bit: arm32v6 / arm32v7
+			// 64bit (aarch64): arm64v8
+			if arch == "arm64" {
+				arch += "v8"
+			} else if arch == "arm" {
+				if out, err := exec.Command("uname", "-m").Output(); err == nil {
+					s := string(out)
+					if strings.HasPrefix(s, "armv7") {
+						arch += "32v7"
+					} else if strings.HasPrefix(s, "armv6") {
+						arch += "32v6"
+					}
+				}
+			}
+			// check alpine specific build
 			if _, err := os.Stat("/etc/alpine-release"); err == nil {
 				arch += "-alpine"
 			}