feat: added hostinfo plugin for darwin (newrelic#629)

internal/os/distro/distro_darwin.go

@@ -0,0 +1,56 @@
+// Copyright 2020 New Relic Corporation. All rights reserved.
+// SPDX-License-Identifier: Apache-2.0
+// +build darwin
+
+package distro
+
+import (
+	"fmt"
+	"github.com/newrelic/infrastructure-agent/pkg/helpers"
+	"regexp"
+)
+
+var (
+	productNameRegex    = regexp.MustCompile("ProductName:\\s*(.*)")
+	productVersionRegex = regexp.MustCompile("ProductVersion:\\s*(.*)")
+
+	defaultProductName = "macOS"
+)
+
+type distroFetcherFn func() (string, error)
+
+func fetchDistro() (string, error) {
+	return helpers.RunCommand("/usr/bin/sw_vers", "")
+}
+
+// GetDistro will parse the output for '/usr/bin/sw_vers' command to detect
+// the ProductName and ProductVersion fields
+func GetDistro() string {
+	return parseDistro(fetchDistro)
+}
+
+func parseDistro(distro distroFetcherFn) string {
+	var productName, productVersion string
+	output, err := distro()
+	if err != nil {
+		return defaultProductName
+	}
+
+	if productNameLine := productNameRegex.FindStringSubmatch(output); len(productNameLine) > 1 {
+		productName = productNameLine[1]
+	} else {
+		productName = defaultProductName
+	}
+
+	if productVersionLine := productVersionRegex.FindStringSubmatch(output); len(productVersionLine) > 1 {
+		productVersion = productVersionLine[1]
+	} else {
+		productVersion = "(Unknown)"
+	}
+
+	return fmt.Sprintf("%s %s", productName, productVersion)
+}
+
+func IsCentos5() bool {
+	return false
+}

internal/os/distro/distro_darwin_test.go

@@ -0,0 +1,46 @@
+// Copyright 2020 New Relic Corporation. All rights reserved.
+// SPDX-License-Identifier: Apache-2.0
+// +build darwin
+
+package distro
+
+import (
+	"fmt"
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestParseDistro_Success(t *testing.T) {
+	actual := parseDistro(func() (string, error) {
+		return `ProductName:	macOS2
+ProductVersion:	11.2.3
+BuildVersion:	20D91`, nil
+	})
+
+	assert.Equal(t, "macOS2 11.2.3", actual)
+}
+
+func TestParseDistro_MissingProductName(t *testing.T) {
+	actual := parseDistro(func() (string, error) {
+		return `ProductVersion:	11.2.3
+BuildVersion:	20D91`, nil
+	})
+
+	assert.Equal(t, "macOS 11.2.3", actual)
+}
+
+func TestParseDistro_MissingProductVersion(t *testing.T) {
+	actual := parseDistro(func() (string, error) {
+		return `BuildVersion:	20D91`, nil
+	})
+
+	assert.Equal(t, "macOS (Unknown)", actual)
+}
+
+func TestParseDistro_OnError(t *testing.T) {
+	actual := parseDistro(func() (string, error) {
+		return ``, fmt.Errorf("error")
+	})
+
+	assert.Equal(t, defaultProductName, actual)
+}

internal/os/distro/distro_unix.go

@@ -1,6 +1,6 @@
 // Copyright 2020 New Relic Corporation. All rights reserved.
 // SPDX-License-Identifier: Apache-2.0
-// +build linux darwin
+// +build linux
 
 package distro