Merge pull request #3 from github/action-configuration

Add package for reading the Action configuration.

Author: chrisgavin

go.mod

@@ -2,4 +2,8 @@ module github.com/github/codeql-action-sync
 
 go 1.14
 
-require github.com/spf13/cobra v1.0.0
+require (
+	github.com/pkg/errors v0.8.0
+	github.com/spf13/cobra v1.0.0
+	github.com/stretchr/testify v1.6.1
+)

go.sum

@@ -0,0 +1,25 @@
+package actionconfiguration
+
+import (
+	"encoding/json"
+
+	"github.com/pkg/errors"
+)
+
+const errorBundleVersionNotSet = "The property \"bundleVersion\" was not set in the Action default configuration."
+
+type ActionConfiguration struct {
+	BundleVersion string
+}
+
+func Parse(contents string) (*ActionConfiguration, error) {
+	var result ActionConfiguration
+	err := json.Unmarshal([]byte(contents), &result)
+	if err != nil {
+		return nil, errors.Wrap(err, "Error decoding Action default configuration.")
+	}
+	if result.BundleVersion == "" {
+		return nil, errors.New(errorBundleVersionNotSet)
+	}
+	return &result, nil
+}

internal/actionconfiguration/actionconfiguration.go

@@ -0,0 +1,29 @@
+package actionconfiguration
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestStandardConfiguration(t *testing.T) {
+	result, err := Parse("{\"bundleVersion\": \"test\"}")
+	require.NoError(t, err)
+	require.Equal(t, "test", result.BundleVersion)
+}
+
+func TestExtraPropertiesIgnored(t *testing.T) {
+	result, err := Parse("{\"bundleVersion\": \"test\", \"someOtherThing\": \"blah\"}")
+	require.NoError(t, err)
+	require.Equal(t, "test", result.BundleVersion)
+}
+
+func TestErrorIfInvalidJSON(t *testing.T) {
+	_, err := Parse("{")
+	require.Error(t, err)
+}
+
+func TestErrorIfMissingProperties(t *testing.T) {
+	_, err := Parse("{\"someOtherThing\": \"blah\"}")
+	require.EqualError(t, err, errorBundleVersionNotSet)
+}