Turn /maps to a standalone module.

Some providers (structs, vault) and parsers (dotenv) require helper
functions in the maps package, which creates a cyclical dependency
with the koanf package. Separating maps to its own module addresses this
and also makes it generally useful outside of koanf.

go.mod

@@ -2,8 +2,11 @@ module github.com/knadh/koanf-test
 
 go 1.18
 
+replace github.com/knadh/koanf-test/maps => ./maps
+
 require (
 	github.com/fsnotify/fsnotify v1.4.9
+	github.com/knadh/koanf-test/maps v0.0.0-00010101000000-000000000000
 	github.com/mitchellh/copystructure v1.2.0
 	github.com/mitchellh/mapstructure v1.5.0
 	github.com/stretchr/testify v1.7.0

maps/go.mod

@@ -0,0 +1,7 @@
+module github.com/knadh/koanf-test/maps
+
+go 1.19
+
+require github.com/mitchellh/copystructure v1.2.0
+
+require github.com/mitchellh/reflectwalk v1.0.2 // indirect

maps/go.sum

@@ -0,0 +1,4 @@
+github.com/mitchellh/copystructure v1.2.0 h1:vpKXTN4ewci03Vljg/q9QvCGUDttBOGBIa15WveJJGw=
+github.com/mitchellh/copystructure v1.2.0/go.mod h1:qLl+cE2AmVv+CoeAwDPye/v+N2HKCj9FbZEVFJRxO9s=
+github.com/mitchellh/reflectwalk v1.0.2 h1:G2LzWKi524PWgd3mLHV8Y5k7s6XUvT0Gef6zxSIeXaQ=
+github.com/mitchellh/reflectwalk v1.0.2/go.mod h1:mSTlrgnPZtwu0c4WaC2kGObEpuNDbx0jmZXqmk4esnw=

parsers/dotenv/go.mod

@@ -2,11 +2,14 @@ module github.com/knadh/koanf-test/parsers/dotenv
 
 go 1.18
 
-replace github.com/knadh/koanf-test => ../../
+replace (
+	github.com/knadh/koanf-test => ../../
+	github.com/knadh/koanf-test/maps => ../../maps
+)
 
 require (
 	github.com/joho/godotenv v1.5.1
-	github.com/knadh/koanf-test v0.0.0-00010101000000-000000000000
+	github.com/knadh/koanf-test/maps v0.0.0-00010101000000-000000000000
 	github.com/stretchr/testify v1.8.1
 )
 

providers/posflag/go.mod

@@ -2,10 +2,14 @@ module github.com/knadh/koanf-test/providers/posflag
 
 go 1.18
 
-replace github.com/knadh/koanf-test => ../../
+replace (
+	github.com/knadh/koanf-test => ../../
+	github.com/knadh/koanf-test/maps => ../../maps
+)
 
 require (
 	github.com/knadh/koanf-test v0.0.0-00010101000000-000000000000
+	github.com/knadh/koanf-test/maps v0.0.0-00010101000000-000000000000
 	github.com/spf13/pflag v1.0.5
 	github.com/stretchr/testify v1.8.1
 )

providers/structs/go.mod

@@ -2,11 +2,14 @@ module github.com/knadh/koanf-test/providers/structs
 
 go 1.18
 
-replace github.com/knadh/koanf-test => ../../
+replace (
+	github.com/knadh/koanf-test => ../../
+	github.com/knadh/koanf-test/maps => ../../maps
+)
 
 require (
 	github.com/fatih/structs v1.1.0
-	github.com/knadh/koanf-test v0.0.0-00010101000000-000000000000
+	github.com/knadh/koanf-test/maps v0.0.0-00010101000000-000000000000
 )
 
 require (

providers/vault/go.mod

@@ -2,11 +2,14 @@ module github.com/knadh/koanf-test/providers/vault
 
 go 1.18
 
-replace github.com/knadh/koanf-test => ../../
+replace (
+	github.com/knadh/koanf-test => ../../
+	github.com/knadh/koanf-test/maps => ../../maps
+)
 
 require (
 	github.com/hashicorp/vault/api v1.8.3
-	github.com/knadh/koanf-test v0.0.0-00010101000000-000000000000
+	github.com/knadh/koanf-test/maps v0.0.0-00010101000000-000000000000
 )
 
 require (

tests/go.mod

@@ -4,6 +4,7 @@ go 1.18
 
 replace (
 	github.com/knadh/koanf-test => ../
+	github.com/knadh/koanf-test/maps => ../maps
 	github.com/knadh/koanf-test/parsers/dotenv => ../parsers/dotenv
 	github.com/knadh/koanf-test/parsers/hcl => ../parsers/hcl
 	github.com/knadh/koanf-test/parsers/hjson => ../parsers/hjson
@@ -30,6 +31,7 @@ require (
 	github.com/hashicorp/hcl v1.0.0 // indirect
 	github.com/hjson/hjson-go/v4 v4.3.0 // indirect
 	github.com/joho/godotenv v1.5.1 // indirect
+	github.com/knadh/koanf-test/maps v0.0.0-00010101000000-000000000000 // indirect
 	github.com/mitchellh/copystructure v1.2.0 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/mitchellh/reflectwalk v1.0.2 // indirect