move some packages to the "internal" directory

- this makes it impossible to import these packages outside Task
- as a side effect, it makes the root directory cleaner

args/args.go

@@ -1,36 +0,0 @@
-package args
-
-import (
-	"errors"
-	"strings"
-
-	"github.com/go-task/task"
-)
-
-var (
-	// ErrVariableWithoutTask is returned when variables are given before any task
-	ErrVariableWithoutTask = errors.New("task: variable given before any task")
-)
-
-// Parse parses command line argument: tasks and vars of each task
-func Parse(args ...string) ([]task.Call, error) {
-	var calls []task.Call
-
-	for _, arg := range args {
-		if !strings.Contains(arg, "=") {
-			calls = append(calls, task.Call{Task: arg})
-			continue
-		}
-		if len(calls) < 1 {
-			return nil, ErrVariableWithoutTask
-		}
-
-		if calls[len(calls)-1].Vars == nil {
-			calls[len(calls)-1].Vars = make(task.Vars)
-		}
-
-		pair := strings.SplitN(arg, "=", 2)
-		calls[len(calls)-1].Vars[pair[0]] = task.Var{Static: pair[1]}
-	}
-	return calls, nil
-}

args/args_test.go

@@ -1,70 +0,0 @@
-package args_test
-
-import (
-	"fmt"
-	"testing"
-
-	"github.com/go-task/task"
-	"github.com/go-task/task/args"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func TestArgs(t *testing.T) {
-	tests := []struct {
-		Args     []string
-		Expected []task.Call
-		Err      error
-	}{
-		{
-			Args: []string{"task-a", "task-b", "task-c"},
-			Expected: []task.Call{
-				{Task: "task-a"},
-				{Task: "task-b"},
-				{Task: "task-c"},
-			},
-		},
-		{
-			Args: []string{"task-a", "FOO=bar", "task-b", "task-c", "BAR=baz", "BAZ=foo"},
-			Expected: []task.Call{
-				{
-					Task: "task-a",
-					Vars: task.Vars{
-						"FOO": task.Var{Static: "bar"},
-					},
-				},
-				{Task: "task-b"},
-				{
-					Task: "task-c",
-					Vars: task.Vars{
-						"BAR": task.Var{Static: "baz"},
-						"BAZ": task.Var{Static: "foo"},
-					},
-				},
-			},
-		},
-		{
-			Args: []string{"task-a", "CONTENT=with some spaces"},
-			Expected: []task.Call{
-				{
-					Task: "task-a",
-					Vars: task.Vars{
-						"CONTENT": task.Var{Static: "with some spaces"},
-					},
-				},
-			},
-		},
-		{
-			Args: []string{"FOO=bar", "task-a"},
-			Err:  args.ErrVariableWithoutTask,
-		},
-	}
-
-	for i, test := range tests {
-		t.Run(fmt.Sprintf("TestArgs%d", i+1), func(t *testing.T) {
-			calls, err := args.Parse(test.Args...)
-			assert.Equal(t, test.Err, err)
-			assert.Equal(t, test.Expected, calls)
-		})
-	}
-}