Merge pull request #482 from nevalang/newcmd

New cmd

cmd/cli/cli.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"os"
 	"path/filepath"
 	"strings"
 
@@ -39,6 +40,20 @@ func newCliApp( //nolint:funlen
 					return nil
 				},
 			},
+			{
+				Name:  "new",
+				Usage: "Get current Nevalang version",
+				Args:  true,
+				Action: func(cCtx *cli.Context) error {
+					if path := cCtx.Args().First(); path != "" {
+						if err := os.Mkdir(path, 0755); err != nil {
+							return err
+						}
+						return createNevaMod(path)
+					}
+					return createNevaMod(workdir)
+				},
+			},
 			{
 				Name:      "get",
 				Usage:     "Add dependency to current module",
@@ -144,3 +159,42 @@ func getMainPkgFromArgs(cCtx *cli.Context) (string, error) {
 	}
 	return dirFromArg, nil
 }
+
+func createNevaMod(path string) error {
+	// Create neva.yml file
+	nevaYmlContent := fmt.Sprintf("neva: %s", pkg.Version)
+	if err := os.WriteFile(
+		filepath.Join(path, "neva.yml"),
+		[]byte(nevaYmlContent),
+		0644,
+	); err != nil {
+		return err
+	}
+
+	// Create src sub-directory
+	srcPath := filepath.Join(path, "src")
+	if err := os.Mkdir(srcPath, 0755); err != nil {
+		return err
+	}
+
+	// Create main.neva file
+	mainNevaContent := `component Main(start any) (stop any) {
+	nodes {
+
+	}
+	net {
+		:start -> :stop
+	}
+}
+`
+
+	if err := os.WriteFile(
+		filepath.Join(srcPath, "main.neva"),
+		[]byte(mainNevaContent),
+		0644,
+	); err != nil {
+		return err
+	}
+
+	return nil
+}

examples/2_hello_world/0_verbose/main.neva

@@ -1,6 +1,3 @@
-// Surprisingly "hello world" isn't the simplest program in Nevalang.
-// Here we learn constants, compiler directives and blockers.
-
 const greeting string = 'Hello, World!'
 
 component Main(start any) (stop any) {

examples/2_hello_world/1_with_const_sender/main.neva

@@ -1,6 +1,3 @@
-// In this example we use `$` suntatic sugar called "const sender"
-// that allows to avoid using compiler directives for sending constants.
-
 const greeting string = 'Hello, World!'
 
 component Main(start any) (stop any) {

examples/2_hello_world/2_with_then_connection/main.neva

@@ -1,7 +1,3 @@
-// Now it's time to learn another syntatic sugar `... -> (...)`
-// Called "then connections" that allows to avoid explicit usage of blockers.
-// It's extremely useful when working with constants to keep code simple.
-
 const greeting string = 'Hello, World!'
 
 component Main(start any) (stop any) {

examples/2_hello_world/3_with_literal_sender/main.neva

@@ -1,10 +1,3 @@
-// Finally, the shortest "hello world" with "literal senders".
-// Why have const senders then, one might ask?
-// First of all, only primitive messages such as bool, int, float and string
-// could be used as network senders. So no structs, lists or maps senders.
-// Secondly, what if you wanna use your message in several places?
-// Finally, you might wanna move your message to const just because it's big!
-
 component Main(start any) (stop any) {
 	nodes { printer Printer<string> }
 	net {

examples/2_hello_world/4_with_unnamed_node/main.neva

@@ -1,10 +1,3 @@
-// Finally, the shortest "hello world" with "literal senders".
-// Why have const senders then, one might ask?
-// First of all, only primitive messages such as bool, int, float and string
-// could be used as network senders. So no structs, lists or maps senders.
-// Secondly, what if you wanna use your message in several places?
-// Finally, you might wanna move your message to const just because it's big!
-
 component Main(start any) (stop any) {
 	nodes { Printer<string> }
 	net {

examples/5_add_real_numbers/with_err_handling/main.neva

@@ -1,8 +1,4 @@
-// Here we learn how to handle errors by fixing this simple program
-
-import {
-	x
-}
+import { x }
 
 component Main(start any) (stop any) {
 	nodes {

examples/5_add_real_numbers/with_sub_components/main.neva

@@ -1,5 +1,3 @@
-// Here we learn how to simplify program by separating concerns
-
 import { x }
 
 component {

examples/6_struct_builder/with_sugar/main.neva

@@ -1,7 +1,3 @@
-// Here we learn how to build structures
-// without custom component and compiler directives
-// by simply using builtin StructBuilder.
-
 type User struct {
     age int
     name string

pkg/version.go

@@ -1,4 +1,4 @@
 package pkg
 
 // Version is the current version of the language and stdlib
-var Version = "0.7.0" //nolint:gochecknoglobals
+var Version = "0.8.0" //nolint:gochecknoglobals