feat(logger): Add an utils func to add common env variables to logger field

log/utils.go

@@ -0,0 +1,27 @@
+package log
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/sirupsen/logrus"
+)
+
+// list of common environment variables
+var commonEnvs = []string{"APP_NAME", "APP_VERSION"}
+
+// AddCommonFieldsFromEnv will analyze "common" environment variable and will add those
+// as fields on a logrus.Entry.
+func AddCommonFieldsFromEnv(l *logrus.Entry) (*logrus.Entry, error) {
+	if l == nil {
+		return nil, fmt.Errorf("missing logrus entry")
+	}
+
+	for _, envKey := range commonEnvs {
+		if v := os.Getenv(envKey); v != "" {
+			l = logrus.WithField(envKey, v)
+		}
+	}
+
+	return l, nil
+}