From 8e99baedf2c3e433750c2f51681f3c9d15d412be Mon Sep 17 00:00:00 2001
From: Pacien TRAN-GIRARD
Date: Sat, 14 Feb 2015 11:24:17 +0100
Subject: First version

---
 envcfg.go | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 envcfg.go

(limited to 'envcfg.go')

diff --git a/envcfg.go b/envcfg.go
new file mode 100644
index 0000000..b91ea13
--- /dev/null
+++ b/envcfg.go
@@ -0,0 +1,40 @@
+// Package envcfg provides environment variable mapping to structs.
+//
+// Can be used to read configuration parameters from the environment.
+//
+// Fields for which environment variables can be found are overwritten, otherwise they are left to their previous
+// value.
+//
+// Can be used, for example, after gcfg to override settings provided in a configuration file.
+package envcfg
+
+import (
+	"errors"
+	"reflect"
+)
+
+const (
+	TAG     = "env"
+	ABS_TAG = "absenv"
+	SEP     = "_"
+)
+
+type node struct {
+	parent     *node
+	value      *reflect.Value
+	properties *reflect.StructField
+}
+
+var ErrInvalidConfigStruct = errors.New("invalid parameter: must map to a struct")
+
+func ReadInto(cfgStruct interface{}) (interface{}, []error) {
+	s := reflect.ValueOf(cfgStruct).Elem()
+
+	if s.Kind() != reflect.Struct {
+		return nil, []error{ErrInvalidConfigStruct}
+	}
+
+	_, errs := setStructFields(node{nil, &s, nil})
+
+	return cfgStruct, errs
+}
-- 
cgit v1.2.3