Add map support

config.go

@@ -221,6 +221,10 @@ func (c *ConfReader) flagsBinding(conf interface{}) error {
 	return nil
 }
 
+func convertToEnvName(fullPath string) string {
+	return strings.ToUpper(strings.ReplaceAll(fullPath, ".", "_"))
+}
+
 type flagInfo struct {
 	Name       string
 	Type       reflect.Type

config_test.go

@@ -408,3 +408,46 @@ func Test_InputStructErrors(t *testing.T) {
 		}
 	})
 }
+
+func Test_Map(t *testing.T) {
+	type MapConf struct {
+		MapWithAttribute map[string]string `flag:"testmap" envvar:"ENV_TEST_MAP"`
+		Testmap          map[string]string
+	}
+
+	resetFlags()
+	expectedMap := map[string]string{"a": "1", "b": "2"}
+
+	t.Run("envVar", func(t *testing.T) {
+		cfg := MapConf{}
+		os.Setenv("TESTMAP_A", "1")
+		os.Setenv("TESTMAP_C", "3")
+		defer os.Unsetenv("TESTMAP_A")
+		defer os.Unsetenv("TESTMAP_C")
+
+		reader := NewConfReader("map-vars")
+		err := reader.Read(&cfg)
+		if assert.NoError(t, err) {
+			assert.Equal(t, expectedMap, cfg.Testmap)
+		}
+	})
+
+	t.Run("file", func(t *testing.T) {
+		cfg := MapConf{}
+		reader := NewConfReader("map").WithSearchDirs("testdata")
+		err := reader.Read(&cfg)
+		if assert.NoError(t, err) {
+			assert.Equal(t, expectedMap, cfg.MapWithAttribute)
+		}
+	})
+
+	t.Run("cmdArgs", func(t *testing.T) {
+		cfg := MapConf{}
+		os.Args = []string{"myapp", "--testmap", "a:1", "--testmap", "b:2", "--testmap", "c:3"}
+		reader := NewConfReader("map-args")
+		err := reader.Read(&cfg)
+		if assert.NoError(t, err) {
+			assert.Equal(t, expectedMap, cfg.TestMap)
+		}
+	})
+}

go.mod

@@ -4,38 +4,39 @@ go 1.19
 
 require (
 	github.com/go-playground/validator/v10 v10.10.1
-	github.com/iamolegga/enviper v1.4.0
+	github.com/iamolegga/enviper v1.4.2
 	github.com/pkg/errors v0.9.1
-	github.com/spf13/viper v1.11.0
-	github.com/stretchr/testify v1.7.1
+	github.com/spf13/viper v1.17.0
+	github.com/stretchr/testify v1.8.4
 )
 
 require (
 	github.com/creasty/defaults v1.6.0
+	github.com/fsnotify/fsnotify v1.7.0
 	github.com/spf13/pflag v1.0.5
 )
 
 require (
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/fsnotify/fsnotify v1.5.4 // indirect
+	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/go-playground/locales v0.14.0 // indirect
 	github.com/go-playground/universal-translator v0.18.0 // indirect
 	github.com/hashicorp/hcl v1.0.0 // indirect
 	github.com/leodido/go-urn v1.2.1 // indirect
-	github.com/magiconair/properties v1.8.6 // indirect
+	github.com/magiconair/properties v1.8.7 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
-	github.com/pelletier/go-toml v1.9.5 // indirect
-	github.com/pelletier/go-toml/v2 v2.0.0 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/rogpeppe/go-internal v1.8.1 // indirect
-	github.com/spf13/afero v1.8.2 // indirect
-	github.com/spf13/cast v1.4.1 // indirect
-	github.com/spf13/jwalterweatherman v1.1.0 // indirect
-	github.com/subosito/gotenv v1.2.0 // indirect
-	golang.org/x/crypto v0.0.0-20220411220226-7b82a4e95df4 // indirect
-	golang.org/x/sys v0.0.0-20220503163025-988cb79eb6c6 // indirect
-	golang.org/x/text v0.3.7 // indirect
-	gopkg.in/ini.v1 v1.66.4 // indirect
-	gopkg.in/yaml.v2 v2.4.0 // indirect
-	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
+	github.com/pelletier/go-toml/v2 v2.1.0 // indirect
+	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
+	github.com/sagikazarmark/locafero v0.4.0 // indirect
+	github.com/sagikazarmark/slog-shim v0.1.0 // indirect
+	github.com/sourcegraph/conc v0.3.0 // indirect
+	github.com/spf13/afero v1.11.0 // indirect
+	github.com/spf13/cast v1.6.0 // indirect
+	github.com/subosito/gotenv v1.6.0 // indirect
+	go.uber.org/multierr v1.11.0 // indirect
+	golang.org/x/crypto v0.16.0 // indirect
+	golang.org/x/exp v0.0.0-20231127185646-65229373498e // indirect
+	golang.org/x/sys v0.15.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
+	gopkg.in/ini.v1 v1.67.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )