feat add the posibility to recognise the filetype, add HasFile and RemoveFile

api.go

@@ -41,6 +41,8 @@ func (s *Settings[C]) SetMnemonic(mnemonic string) *Settings[C] {
 }
 
 // Config() returns the configuration
+// Remember that the configuration is a copy of the original configuration.
+// Changes to the configuration will not be reflected in the original configuration.
 func (s *Settings[C]) Config() C {
 	return s.config
 }

api_test.go

@@ -4,7 +4,7 @@
 package configuration
 
 import (
-	"github.com/magiconair/properties/assert"
+	"github.com/stretchr/testify/assert"
 	"testing"
 )
 

env_test.go

@@ -4,7 +4,7 @@
 package configuration
 
 import (
-	"github.com/magiconair/properties/assert"
+	"github.com/stretchr/testify/assert"
 	"os"
 	"testing"
 )

error.go

@@ -89,3 +89,9 @@ type MismatchedTypeError error
 func newMismatchedTypeError(expected, actual reflect.Type) MismatchedTypeError {
 	return MismatchedTypeError(errors.New("expected type " + expected.String() + " but got " + actual.String()))
 }
+
+type UnknownFileExtensionError error
+
+func newUnknownFileExtensionError(extension, filename string) UnknownFileExtensionError {
+	return UnknownFileExtensionError(errors.New("unknown file extension " + extension + " for file " + filename))
+}

file.go

@@ -8,6 +8,7 @@ import (
 	"io/fs"
 	"os"
 	"path"
+	"path/filepath"
 )
 
 type files struct {
@@ -23,9 +24,60 @@ type fileBackend struct {
 	fs          fs.FS
 }
 
+func (s *Settings[c]) HasFile(file string) bool {
+	for _, f := range s.files.files {
+		if f.path == file {
+			return true
+		}
+	}
+	return false
+}
+
 // AddFiles adds a file to the list of files to import
-func (s *Settings[C]) AddFile(file string, format Format) *Settings[C] {
-	s.files.files = append(s.files.files, files{file, format})
+func (s *Settings[C]) AddFile(file string, format ...Format) *Settings[C] {
+
+	var f Format
+	f = RecogniseFormat
+
+	if len(format) <= 1 {
+		f = format[0]
+	} else {
+		panic("too many arguments")
+	}
+
+	if f == RecogniseFormat {
+		ext := filepath.Ext(file)
+		switch ext {
+		case ".yaml":
+			f = Yaml
+		case ".json":
+			f = Json
+		case ".toml":
+			f = Toml
+		case ".properties":
+			f = Properties
+		default:
+			if ext != "" {
+				s.errors = append(s.errors, newUnknownFileExtensionError(ext, file))
+				return s
+			}
+			f = s.files.format
+		}
+	}
+
+	s.files.files = append(s.files.files, files{file, f})
+	return s
+}
+
+func (s *Settings[C]) RemoveFile(file string) *Settings[C] {
+
+	for i, f := range s.files.files {
+		if f.path == file {
+			s.files.files = append(s.files.files[:i], s.files.files[i+1:]...)
+			return s
+		}
+	}
+
 	return s
 }
 

file_test.go

@@ -5,7 +5,7 @@ package configuration
 
 import (
 	"bytes"
-	"github.com/magiconair/properties/assert"
+	"github.com/stretchr/testify/assert"
 	"io"
 	"io/fs"
 	"os"
@@ -510,6 +510,54 @@ func TestSettingAddFile(t *testing.T) {
 
 }
 
+func TestRemoveFile(t *testing.T) {
+	cfg := ConfigStruct2{}
+
+	f, err := os.CreateTemp("", "watch_test")
+	if err != nil {
+		t.Error(err)
+		return
+	}
+
+	defer os.Remove(f.Name())
+
+	f.WriteString("A: \"from file\"")
+
+	c := New(cfg)
+	c.AddFile(f.Name(), Yaml)
+	assert.Equal(t, c.Config().A, "")
+
+	c.Import()
+	assert.Equal(t, c.Config().A, "from file")
+
+	assert.True(t, c.HasFile(f.Name()))
+	c.RemoveFile(f.Name())
+	assert.False(t, c.HasFile(f.Name()))
+
+}
+
+func TestSettingAddFileWithRecognise(t *testing.T) {
+	cfg := ConfigStruct2{}
+
+	f, err := os.CreateTemp("", "watch_test")
+	if err != nil {
+		t.Error(err)
+		return
+	}
+
+	defer os.Remove(f.Name())
+	f.WriteString("A: \"from file\"")
+
+	c := New(cfg)
+	c.AddFile(f.Name(), RecogniseFormat)
+
+	assert.Equal(t, c.Config().A, "")
+
+	c.Import()
+	assert.Equal(t, c.Config().A, "from file")
+
+}
+
 func TestSetConfigName(t *testing.T) {
 
 	cfg := ConfigStruct2{}

flags_test.go

@@ -8,7 +8,7 @@ import (
 	"os"
 	"testing"
 
-	"github.com/magiconair/properties/assert"
+	"github.com/stretchr/testify/assert"
 )
 
 // Example for README

format.go

@@ -6,6 +6,7 @@ package configuration
 type Format int
 
 const (
+	RecogniseFormat        = -1
 	Yaml            Format = iota
 	Json
 	Toml

import_test.go

@@ -4,7 +4,7 @@
 package configuration
 
 import (
-	"github.com/magiconair/properties/assert"
+	"github.com/stretchr/testify/assert"
 	"testing"
 )
 

properties_test.go

@@ -4,7 +4,7 @@
 package configuration
 
 import (
-	"github.com/magiconair/properties/assert"
+	"github.com/stretchr/testify/assert"
 	"testing"
 )
 

watch_test.go

@@ -4,7 +4,7 @@
 package configuration
 
 import (
-	"github.com/magiconair/properties/assert"
+	"github.com/stretchr/testify/assert"
 	"os"
 	"testing"
 	"time"