Change License and update doc

.gitignore

@@ -14,4 +14,6 @@
 # Dependency directories
 # vendor/
 .vscode/
-cmd/
+cmd/
+
+coverage.out

LICENSE

@@ -1,24 +1,21 @@
-Copyright (c) 2022, GoLoop.
-All rights reserved.
+MIT License
 
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:
-1. Redistributions of source code must retain the above copyright
-   notice, this list of conditions and the following disclaimer.
-2. Redistributions in binary form must reproduce the above copyright
-   notice, this list of conditions and the following disclaimer in the
-   documentation and/or other materials provided with the distribution.
-3. Neither the name of the GoLoop nor the
-   names of its contributors may be used to endorse or promote products
-   derived from this software without specific prior written permission.
+Copyright (c) 2020 GoLoop
 
-THIS SOFTWARE IS PROVIDED BY COPYRIGHT HOLDER AND CONTRIBUTORS ''AS IS'' AND
-ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER AND CONTRIBUTORS BE LIABLE FOR
-ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
-ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -1,10 +1,4 @@
-[//]: # (!!!Don't modify the README.md, use `make readme` to generate it!!!)
-
-
-[![Go Report Card](https://goreportcard.com/badge/github.com/goloop/opt)](https://goreportcard.com/report/github.com/goloop/opt) [![License](https://img.shields.io/badge/license-BSD-blue)](https://github.com/goloop/opt/blob/master/LICENSE) [![License](https://img.shields.io/badge/godoc-YES-green)](https://godoc.org/github.com/goloop/opt)
-
-
-*Version: v1.0.3*
+[![Go Report Card](https://goreportcard.com/badge/github.com/goloop/opt)](https://goreportcard.com/report/github.com/goloop/opt) [![License](https://img.shields.io/badge/license-MIT-brightgreen)](https://github.com/goloop/opt/blob/master/LICENSE) [![License](https://img.shields.io/badge/godoc-YES-green)](https://godoc.org/github.com/goloop/opt)
 
 # opt
 
@@ -14,7 +8,9 @@ Package opt implements methods for manage arguments of the command-line.
 
 To install this package we can use `go get`:
 
-    $ go get -u github.com/goloop/opt
+```
+$ go get -u github.com/goloop/opt
+```
 
 ## Usage
 
@@ -223,7 +219,7 @@ You can use the following tags to configure command line parsing rules:
 
 ### Tag `opt`
 
-Specifies the name of the short or long flag whose data must be entered in the appropriate field. If no tag is specified, it will be automatically set to the value of the field name converted to kebab-case. For example: `UserName` converts to `user-name`. 
+Specifies the name of the short or long flag whose data must be entered in the appropriate field. If no tag is specified, it will be automatically set to the value of the field name converted to kebab-case. For example: `UserName` converts to `user-name`.
 
 Has reserved values:
 

args.go

@@ -39,10 +39,9 @@ type argMap map[string][]argValue
 // the flag --no-verbose - is it the no-verbose flag or the objection
 // for the verbose flag? This slice stores all available long flags
 // declared in the data structure.
-// func (am argMap) parse(args []string, shortFlags, longFlags flagMap) error {
 func (am argMap) parse(args []string, flags map[string]int) error {
 	// Controls of parsing state of positional arguments.
-	var posState = struct {
+	posState := struct {
 		order  int  // real index of the positional argument
 		active bool // true if switch to parsing of positional arguments
 	}{}
@@ -58,7 +57,7 @@ func (am argMap) parse(args []string, flags map[string]int) error {
 	// to take the following argument in the course of current
 	// iteration and to skip next one iteration.
 	for i := 0; i < len(args); i++ {
-		var item = args[i]
+		item := args[i]
 
 		switch {
 		case item == "--":
@@ -212,7 +211,7 @@ func (am argMap) parse(args []string, flags map[string]int) error {
 
 // The asFlat returns argMap as simple map[string][]string.
 func (am argMap) asFlat() map[string][]string {
-	var result = make(map[string][]string, len(am))
+	result := make(map[string][]string, len(am))
 
 	for key, items := range am {
 		tmp := make([]string, 0, len(items))
@@ -281,9 +280,9 @@ func (am argMap) posValues() []string {
 // Returns defValue with false as second param if the value
 // is not found.
 func (am argMap) flagValue(
-	shortFlag string,
-	longFlag string,
-	defValue string,
+	shortFlag,
+	longFlag,
+	defValue,
 	sepList string,
 ) ([]string, bool) {
 	var result []string

decode_test.go

@@ -107,7 +107,7 @@ func TestUnmarshalOptMix(t *testing.T) {
 	}
 
 	for i, test := range tests {
-		var d = data{}
+		d := data{}
 		if err := unmarshalOpt(&d, test); err != nil {
 			t.Error(err)
 			return // it makes no sense to display all errors
@@ -260,7 +260,7 @@ func TestUnmarshalOptNotStruct(t *testing.T) {
 		}
 	}()
 
-	var d = new(int)
+	d := new(int)
 	unmarshalOpt(d, []string{"/app", "5", "10"}) // panic is expected
 }
 
@@ -335,9 +335,7 @@ func TestWrongList(t *testing.T) {
 
 // TestStructUrl tests with pointer on struct.
 func TestStructUrl(t *testing.T) {
-	var (
-		site url.URL
-	)
+	var site url.URL
 
 	split := func(str string) []string { return strings.Split(str, ":") }
 	test := split("./app:--site:%$")
@@ -476,7 +474,7 @@ func TestUnmarshalOptPositional(t *testing.T) {
 		ABC  []int  `opt:"[]" help:"position args as list"`
 	}
 
-	var d, sum = data{}, 0
+	d, sum := data{}, 0
 
 	if err := unmarshalOpt(&d, []string{"/app", "5", "10", "15"}); err != nil {
 		t.Error(err)
@@ -510,7 +508,7 @@ func TestUnmarshalOptPositional(t *testing.T) {
 
 // TestStrToBool tests strToBool function.
 func TestStrToBool(t *testing.T) {
-	var tests = []testBoolDataTestType{
+	tests := []testBoolDataTestType{
 		{"", false, true},
 		{"0", false, true},
 		{"1", true, true},

doc.go

@@ -1,9 +1,2 @@
 // Package opt implements methods for manage arguments of the command-line.
 package opt
-
-const version = "1.0.3"
-
-// Version returns the version of the module.
-func Version() string {
-	return "v" + version
-}

go.mod

@@ -1,7 +1,7 @@
 module github.com/goloop/opt
 
-go 1.15
+go 1.20
 
 require (
-	github.com/goloop/scs v1.0.1
+	github.com/goloop/scs v1.1.1
 )

go.sum

@@ -1,4 +1,2 @@
-github.com/goloop/scs v1.0.1 h1:6QnhDIH2pzrGrbwhCFSJWcqfjqu4z9cLfE3kpfeCx/4=
-github.com/goloop/scs v1.0.1/go.mod h1:De464a22sqV3KyrR0mqa8qgS6nSFpdeX5ePKEJxXNxo=
-github.com/robertkrimen/godocdown v0.0.0-20130622164427-0bfa04905481 h1:jMxcLa+VjJKhpCwbLUXAD15wJ+hhvXMLujCl3MkXpfM=
-github.com/robertkrimen/godocdown v0.0.0-20130622164427-0bfa04905481/go.mod h1:C9WhFzY47SzYBIvzFqSvHIR6ROgDo4TtdTuRaOMjF/s=
+github.com/goloop/scs v1.1.1 h1:ixqutFAtf1tZXZ/9nQLNKR0aRUIQiVGNozPnCfKssso=
+github.com/goloop/scs v1.1.1/go.mod h1:pUuCj5l3EDy+r8m8VZ505Z60BFgtEQ7+Qh0/VmJvrr8=

help.go

@@ -115,7 +115,7 @@ func wrapHelpMsg(sep, str string, tab, wc int) []string {
 // 0 - if such a container exists and its size is not limited (for slice),
 // more than 0 if the number of elements in this container is limited (array).
 func getOptionBlock(fcl fieldCastList, am argMap) (string, int) {
-	var lines = []string{}
+	lines := []string{}
 
 	// Go through all the fields, make a prefix for the help line,
 	// which includes the available arguments. Determine the largest