Merging slices with override. Using go.mod

Author: smgladkovskiy

Gopkg.lock

@@ -0,0 +1,9 @@
+module github.com/microparts/configuration-golang
+
+go 1.12
+
+require (
+	github.com/imdario/mergo v0.3.7
+	github.com/stretchr/testify v1.3.0
+	gopkg.in/yaml.v2 v2.2.2
+)

Gopkg.toml

@@ -0,0 +1,13 @@
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/imdario/mergo v0.3.7 h1:Y+UAYTZ7gDEuOfhxKWy+dvb5dRQ6rJjFSdX2HZY1/gI=
+github.com/imdario/mergo v0.3.7/go.mod h1:2EnlNZ0deacrJVfApfmtdGgDfMuh/nq6Ok1EcJh5FfA=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

go.mod

@@ -91,7 +91,7 @@ func ReadConfigs(cfgPath string) ([]byte, error) {
 			}
 
 			cc := configs[folder]
-			if err := mergo.Merge(&cc, configFromFile[folder], mergo.WithOverride, mergo.WithAppendSlice); err != nil {
+			if err := mergo.Merge(&cc, configFromFile[folder], mergo.WithOverride); err != nil {
 				log.Fatalf("[config] merging files in folder error: %s", err)
 			}
 			configs[folder] = cc
@@ -105,7 +105,7 @@ func ReadConfigs(cfgPath string) ([]byte, error) {
 	config := configs["defaults"]
 	c, ok := configs[stage]
 	if ok {
-		if err := mergo.Merge(&config, c, mergo.WithOverride, mergo.WithAppendSlice); err != nil {
+		if err := mergo.Merge(&config, c, mergo.WithOverride); err != nil {
 			log.Fatalf("[config] merging error: %s", err)
 		}