From e6b75e5348eb198ea95408856349ed11dc4f4649 Mon Sep 17 00:00:00 2001
From: Matthieu 'JP' DERASSE <github@derasse.fr>
Date: Tue, 10 Jan 2023 22:36:42 +0000
Subject: [PATCH] feat(logger): Add an utils func to add common env variables
 to logger field

---
 log/utils.go | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 log/utils.go

diff --git a/log/utils.go b/log/utils.go
new file mode 100644
index 0000000..1acf6ed
--- /dev/null
+++ b/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
+}