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Код Задачи Слияния Проекты Выпуски Пакеты Вики Активность Действия

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GNU GENERAL PUBLIC LICENSE
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if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

36
Makefile Обычный файл
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APPNAME=$(shell basename `pwd`)
LDFLAGS="-s"
TS=$(shell date -u '+%Y/%m/%d %H:%M:%S')
all: clean test build install
build/$(APPNAME):
@echo $(TS) Building $(APPAME) ...
@go build -ldflags $(LDFLAGS) -o build/$(APPNAME) platform/main/main.go
@echo $(TS) Done.
build: build/$(APPNAME)
clean:
@echo $(TS) Cleaning up previous build ...
@rm -f build/*
@echo $(TS) Done.
install:
@echo $(TS) Installing $(APPNAME) ...
@cp build/$(APPNAME) $(GOPATH)/bin/
@mkdir -p $(HOME)/esp32/
@cp infrastructure/ino/mapping.json $(HOME)/esp32/mapping.json
@echo $(TS) Done.
packages:
@echo $(TS) Installing Go packages ...
@go get -u github.com/andygeiss/assert
@go get -u github.com/andygeiss/esp32-controller
@go get -u github.com/andygeiss/log
@echo $(TS) Done.
test:
@echo $(TS) Testing ...
@go test -v ./...
@echo $(TS) Done.

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README.md Обычный файл
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# ESP32 Transpiler
[![](https://goreportcard.com/badge/github.com/andygeiss/esp32-transpiler)](https://goreportcard.com/report/github.com/andygeiss/esp32-transpiler)
## Purpose
The [Arduino IDE](https://www.arduino.cc/en/Main/Software) is easy to use.
But I faced problems like maintainability and testability at more complicated IoT projects.
I needed to compile and flash the ESP32 before testing my code functionality by doing it 100% manually.
This solution transpiles Golang into Arduino code, which can be compiled to an image by using the ESP32 toolchain.
Now I am able to use a fully automated testing approach instead of doing it 100% manually.
**Important**: The Transpiler only supports a small subset of the [Golang Language Specification](https://golang.org/ref/spec).
Look at the tests in <code>infrastructure/ino/worker_test.go</code> for more information.
## Installation
First install necessary packages by using:
make packages
## Test and Build
Now Build the transpiler executable by running:
make
## Install
Copy the transpiler executable into your <code>$GOPATH/bin</code> directory.
Then copy the file which will be used as mapping Golang to Arduino-API:
make install
## Usage
Usage of esp32-transpiler:
-mapping string
API Mapping file (default "/home/user/esp32/mapping.json")
-source string
Golang source file
-target string
Arduino sketch file

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application/transpile/transpile.go Обычный файл
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package transpile
import (
"fmt"
"github.com/andygeiss/esp32-transpiler/business/transpiler"
"github.com/andygeiss/esp32-transpiler/business/worker"
)
// Transpiler uses a given worker to main source code.
type Transpiler struct {
w worker.Worker
}
const (
// ErrorTranspilerWorkerIsNil ...
ErrorTranspilerWorkerIsNil = "Worker should not be nil"
)
// NewTranspiler creates a new transpiler and returns its address.
func NewTranspiler(w worker.Worker) transpiler.Transpiler {
return &Transpiler{w}
}
// Transpile invokes the workers
func (c *Transpiler) Transpile() error {
if c.w == nil {
return fmt.Errorf("Error: %v", ErrorTranspilerWorkerIsNil)
}
return c.w.Start()
}

34
application/transpile/transpile_test.go Обычный файл
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package transpile_test
import (
"bytes"
. "github.com/andygeiss/assert"
"github.com/andygeiss/esp32-transpiler/application/transpile"
"github.com/andygeiss/esp32-transpiler/business/worker"
"io"
"testing"
)
type mockupWorker struct {
in io.Reader
out io.Writer
}
func (w *mockupWorker) Prepare(source []worker.Source) (chan worker.Source, error) {
out := make(chan worker.Source)
return out, nil
}
func (w *mockupWorker) Start() error {
return nil
}
func (w *mockupWorker) Transform(source chan worker.Source) (chan worker.Target, error) {
out := make(chan worker.Target)
return out, nil
}
func TestTranspileErrorShouldBeNil(t *testing.T) {
var in, out bytes.Buffer
worker := &mockupWorker{&in, &out}
trans := transpile.NewTranspiler(worker)
Assert(t, trans.Transpile(), IsNil())
}

6
business/transpiler/transpiler.go Обычный файл
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package transpiler
// Transpiler specifies the behaviour of taking Go source code and transforming it into another language.
type Transpiler interface {
Transpile() error
}

7
business/worker/mapping.go Обычный файл
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package worker
// Mapping specifies the business logic to apply transformation to a specific identifier.
type Mapping interface {
Apply(ident string) string
Read() error
}

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business/worker/source.go Обычный файл
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package worker
// Source stores the code which will be transformed into another format.
type Source interface {
String() string
}

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business/worker/target.go Обычный файл
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package worker
// Target stores the result of the transformation process.
type Target interface {
String() string
}

6
business/worker/worker.go Обычный файл
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package worker
// Worker specifies the business logic of transforming a source code format into another target format.
type Worker interface {
Start() error
}

41
infrastructure/ino/mapping.go Обычный файл
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package ino
import (
"encoding/json"
"github.com/andygeiss/esp32-transpiler/business/worker"
"io/ioutil"
)
// Mapping specifies the business logic to apply transformation to a specific Golang identifier by reading simple JSON map.
type Mapping struct {
Filename string `json:"filename"`
Rules map[string]string `json:"rules"`
}
// NewMapping creates a new mapping and returns its address.
func NewMapping(filename string) worker.Mapping {
rules := make(map[string]string, 0)
return &Mapping{filename, rules}
}
// Apply checks the Golang identifier and transforms it to a specific representation.
func (m *Mapping) Apply(ident string) string {
for wanted := range m.Rules {
if ident == wanted {
ident = m.Rules[ident]
}
}
return ident
}
// Read gets the mapping rules from the local filesystem.
func (m *Mapping) Read() error {
bytes, err := ioutil.ReadFile(m.Filename)
if err != nil {
return err
}
var rules map[string]string
json.Unmarshal(bytes, &rules)
m.Rules = rules
return nil
}

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infrastructure/ino/mapping.json Обычный файл
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{
"digital.Low": "LOW",
"digital.High": "HIGH",
"digital.ModeInput": "INPUT",
"digital.ModeOutput": "OUTPUT",
"digital.PinMode": "pinMode",
"digital.Write": "digitalWrite",
"random.Num": "random",
"random.NumBetween": "random",
"random.Seed": "randomSeed",
"serial.Available": "Serial.available",
"serial.BaudRate300": "300",
"serial.BaudRate600": "600",
"serial.BaudRate1200": "1200",
"serial.BaudRate2400": "2400",
"serial.BaudRate4800": "4800",
"serial.BaudRate9600": "9600",
"serial.BaudRate14400": "14400",
"serial.BaudRate28800": "28800",
"serial.BaudRate38400": "38400",
"serial.BaudRate57600": "57600",
"serial.BaudRate115200": "115200",
"serial.Begin": "Serial.begin",
"serial.Print": "Serial.print",
"serial.Println": "Serial.println",
"timer.Delay": "delay",
"wifi": "WiFi",
"wifi.Begin": "WiFi.begin",
"wifi.BeginEncrypted": "WiFi.begin",
"wifi.BSSID": "WiFi.BSSID",
"wifi.Disconnect": "WiFi.disconnect",
"wifi.EncryptionType": "WiFi.encryptionType",
"wifi.EncryptionTypeAuto": "8",
"wifi.EncryptionTypeCCMP": "4",
"wifi.EncryptionTypeNone": "7",
"wifi.EncryptionTypeTKIP": "2",
"wifi.EncryptionTypeWEP": "5",
"wifi.LocalIP": "WiFi.localIP",
"wifi.RSSI": "WiFi.RSSI",
"wifi.ScanNetworks": "WiFi.scanNetworks",
"wifi.SetDNS": "WiFi.setDNS",
"wifi.SSID": "WiFi.SSID",
"wifi.StatusConnected": "WL_CONNECTED",
"wifi.StatusIdle": "WL_IDLE",
"Loop": "void loop",
"Setup": "void setup"
}

365
infrastructure/ino/worker.go Обычный файл
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package ino
import (
"fmt"
"github.com/andygeiss/esp32-transpiler/business/worker"
"go/ast"
"go/parser"
"go/token"
"io"
"strings"
)
const (
// ErrorWorkerReaderIsNil ...
ErrorWorkerReaderIsNil = "Reader should not be nil"
// ErrorWorkerWriterIsNil ...
ErrorWorkerWriterIsNil = "Writer should not be nil"
)
var mapping worker.Mapping
// Worker specifies the business logic of transforming a source code format into another target format.
type Worker struct {
in io.Reader
out io.Writer
}
// NewWorker creates a a new worker and returns its address.
func NewWorker(in io.Reader, out io.Writer, m worker.Mapping) worker.Worker {
mapping = m
return &Worker{in, out}
}
// Start ...
func (w *Worker) Start() error {
if w.in == nil {
return fmt.Errorf("Error: %s", ErrorWorkerReaderIsNil)
}
if w.out == nil {
return fmt.Errorf("Error: %s", ErrorWorkerWriterIsNil)
}
// Read tokens from file by using Go's parser.
fset := token.NewFileSet()
file, err := parser.ParseFile(fset, "source.go", w.in, 0)
if err != nil {
return fmt.Errorf("ParseFile failed! %v", err)
}
// If source has no declarations then main it to an empty for loop.
if file.Decls == nil {
fmt.Fprint(w.out, "void loop() {} void setup() {}")
return nil
}
// Use Goroutines to work concurrently.
count := len(file.Decls)
done := make(chan bool, count)
dst := make([]chan string, count)
for i := 0; i < count; i++ {
dst[i] = make(chan string, 1)
}
// Start a worker with an individual channel for each declaration in the source file.
for i, decl := range file.Decls {
go handleDecl(i, decl, dst[i], done)
}
// Wait for all workers are done.
for i := 0; i < count; i++ {
select {
case <-done:
}
}
// Print the ordered result.
for i := 0; i < count; i++ {
for content := range dst[i] {
w.out.Write([]byte(content))
}
}
// Print the AST.
//ast.Fprint(os.Stderr, fset, file, nil)
return nil
}
func handleAssignStmt(stmt ast.Stmt) string {
a := stmt.(*ast.AssignStmt)
code := ""
code += handleAssignStmtExpr(a.Lhs)
code += a.Tok.String()
code += handleAssignStmtExpr(a.Rhs)
return code
}
func handleAssignStmtExpr(expr []ast.Expr) string {
code := ""
ops := make([]string, 0)
for _, op := range expr {
switch o := op.(type) {
case *ast.BasicLit:
ops = append(ops, handleBasicLit(o))
case *ast.BinaryExpr:
ops = append(ops, handleBinaryExpr(o))
case *ast.CallExpr:
ops = append(ops, handleCallExpr(o))
case *ast.Ident:
ops = append(ops, handleIdent(o))
}
}
code += strings.Join(ops, ",")
return code
}
func handleBasicLit(expr ast.Expr) string {
bl := expr.(*ast.BasicLit)
code := ""
code += bl.Value
return code
}
func handleBinaryExpr(expr ast.Expr) string {
e := expr.(*ast.BinaryExpr)
code := ""
switch x := e.X.(type) {
case *ast.Ident:
code += handleIdent(x)
}
code += e.Op.String()
switch y := e.Y.(type) {
case *ast.Ident:
code += handleIdent(y)
}
return code
}
func handleCallExpr(expr *ast.CallExpr) string {
code := ""
switch e := expr.Fun.(type) {
case *ast.Ident:
code += handleIdent(e)
case *ast.SelectorExpr:
code += handleSelectorExpr(e)
}
code += "("
args := make([]string, 0)
for _, arg := range expr.Args {
switch a := arg.(type) {
case *ast.BasicLit:
args = append(args, handleBasicLit(a))
case *ast.CallExpr:
args = append(args, handleCallExpr(a))
case *ast.SelectorExpr:
args = append(args, handleSelectorExpr(a))
}
}
code += strings.Join(args, ",")
code += ")"
return code
}
func handleDecl(id int, decl ast.Decl, dst chan<- string, done chan<- bool) {
code := ""
switch d := decl.(type) {
case *ast.FuncDecl:
code += handleFuncDecl(d)
case *ast.GenDecl:
code += handleGenDecl(d)
}
dst <- code
close(dst)
done <- true
}
func handleDeclStmt(stmt *ast.DeclStmt) string {
code := ""
switch decl := stmt.Decl.(type) {
case *ast.GenDecl:
code += handleGenDecl(decl)
}
return code
}
func handleExprStmt(stmt *ast.ExprStmt) string {
code := ""
switch x := stmt.X.(type) {
case *ast.CallExpr:
code += handleCallExpr(x)
}
return code
}
func handleFuncDecl(decl ast.Decl) string {
fd := decl.(*ast.FuncDecl)
code := ""
name := ""
code += handleFuncDeclType(fd.Type)
code += " "
name = handleFuncDeclName(fd.Name)
if name == "NewController" {
return ""
}
code += name
code += "("
code += handleFuncDeclParams(fd.Type)
code += ") {"
code += handleFuncDeclBody(fd.Body)
code += "}"
return code
}
func handleFuncDeclParams(t *ast.FuncType) string {
code := ""
if t.Params == nil || t.Params.List == nil {
return code
}
values := make([]string, 0)
for _, field := range t.Params.List {
ftype := ""
switch ft := field.Type.(type) {
case *ast.Ident:
ftype = handleIdent(ft)
}
for _, names := range field.Names {
values = append(values, ftype+" "+names.Name)
}
}
code += strings.Join(values, ",")
return code
}
func handleFuncDeclBody(body *ast.BlockStmt) string {
code := ""
if body == nil {
return code
}
for _, stmt := range body.List {
switch s := stmt.(type) {
case *ast.AssignStmt:
code += handleAssignStmt(s)
code += ";"
case *ast.DeclStmt:
code += handleDeclStmt(s)
case *ast.ExprStmt:
code += handleExprStmt(s)
code += ";"
}
}
return code
}
func handleFuncDeclName(ident *ast.Ident) string {
code := ""
if ident == nil {
return code
}
code += ident.Name
code = mapping.Apply(code)
return code
}
func handleFuncDeclType(t *ast.FuncType) string {
code := ""
if t.Results == nil {
code = "void"
}
return code
}
func handleGenDecl(decl ast.Decl) string {
gd := decl.(*ast.GenDecl)
code := ""
switch gd.Tok {
case token.CONST:
code += "const "
}
code += handleSpecs(gd.Specs)
return code
}
func handleIdent(expr ast.Expr) string {
ident := expr.(*ast.Ident)
code := ""
switch ident.Name {
case "string":
code += "char*"
default:
code += ident.Name
}
return code
}
func handleImportSpec(spec ast.Spec) string {
s := spec.(*ast.ImportSpec)
code := ""
if s.Name != nil {
name := handleIdent(s.Name)
name = mapping.Apply(name)
if name != "" {
if name != "controller" {
code = "#include <" + name + ".h>\n"
}
}
}
return code
}
func handleSelectorExpr(expr ast.Expr) string {
s := expr.(*ast.SelectorExpr)
code := ""
switch x := s.X.(type) {
case *ast.Ident:
code += handleIdent(x)
}
code += "."
code += handleIdent(s.Sel)
code = mapping.Apply(code)
return code
}
func handleSpecs(specs []ast.Spec) string {
code := ""
for _, spec := range specs {
switch spec.(type) {
case *ast.ImportSpec:
code += handleImportSpec(spec)
case *ast.ValueSpec:
code += handleValueSpec(spec) + ";"
}
}
return code
}
func handleValueSpec(spec ast.Spec) string {
s := spec.(*ast.ValueSpec)
code := ""
code += handleValueSpecType(s.Type)
code += " "
code += handleValueSpecNames(s.Names)
code += " = "
code += handleValueSpecValues(s.Values)
return code
}
func handleValueSpecNames(names []*ast.Ident) string {
code := ""
for _, name := range names {
code += handleIdent(name)
}
return code
}
func handleValueSpecType(expr ast.Expr) string {
code := ""
switch t := expr.(type) {
case *ast.Ident:
code += handleIdent(t)
}
return code
}
func handleValueSpecValues(values []ast.Expr) string {
code := ""
for _, value := range values {
switch v := value.(type) {
case *ast.BasicLit:
code += handleBasicLit(v)
}
}
return code
}

247
infrastructure/ino/worker_test.go Обычный файл
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package ino_test
import (
"bytes"
. "github.com/andygeiss/assert"
"github.com/andygeiss/esp32-transpiler/infrastructure/ino"
"strings"
"testing"
)
// Trim removes all the whitespaces and returns a new string.
func Trim(s string) string {
s = strings.Replace(s, " ", "", -1)
s = strings.Replace(s, "\n", "", -1)
s = strings.Replace(s, "\r", "", -1)
s = strings.Replace(s, "\t", "", -1)
return s
}
// Validate the content of a given source with an expected outcome by using a string compare.
// The Worker will be started and used to transform the source into an Arduino sketch format.
func Validate(source, expected string, t *testing.T) {
var in, out bytes.Buffer
mapping := ino.NewMapping("mapping.json")
Assert(t, mapping.Read(), IsNil())
in.WriteString(source)
worker := ino.NewWorker(&in, &out, mapping)
Assert(t, worker.Start(), IsNil())
code := out.String()
tcode, texpected := Trim(code), Trim(expected)
Assert(t, tcode, IsEqual(texpected))
}
func TestEmptyPackage(t *testing.T) {
source := `package test`
expected := `void loop(){}
void setup() {} `
Validate(source, expected, t)
}
func TestFunctionDeclaration(t *testing.T) {
source := `package test
func foo() {}
func bar() {}
`
expected := `void foo(){}
void bar() {} `
Validate(source, expected, t)
}
func TestFunctionDeclarationWithArgs(t *testing.T) {
source := `package test
func foo(x int) {}
func bar(y int) {}
`
expected := `void foo(int x){}
void bar(int y) {} `
Validate(source, expected, t)
}
func TestConstStringDeclaration(t *testing.T) {
source := `package test
const foo string = "bar"
`
expected := `
const char* foo = "bar";
`
Validate(source, expected, t)
}
func TestFunctionWithConstStringDeclaration(t *testing.T) {
source := `package test
func foo() {
const foo string = "bar"
}
`
expected := `
void foo() {
const char* foo = "bar";
}
`
Validate(source, expected, t)
}
func TestFunctionWithVarStringDeclaration(t *testing.T) {
source := `package test
func foo() {
var foo string = "bar"
}
`
expected := `
void foo() {
char* foo = "bar";
}
`
Validate(source, expected, t)
}
func TestFunctionWithFunctionCall(t *testing.T) {
source := `package test
func foo() {
bar()
}
`
expected := `
void foo() {
bar();
}
`
Validate(source, expected, t)
}
func TestFunctionWithFunctionCallWithArgs(t *testing.T) {
source := `package test
func foo() {
bar(1,2,3)
}
`
expected := `
void foo() {
bar(1,2,3);
}
`
Validate(source, expected, t)
}
func TestFunctionWithFunctionCallWithString(t *testing.T) {
source := `package test
func foo() {
bar("foo")
}
`
expected := `
void foo() {
bar("foo");
}
`
Validate(source, expected, t)
}
func TestFunctionWithPackageFunctionCall(t *testing.T) {
source := `package test
func foo() {
foo.Bar(1,"2")
}
`
expected := `
void foo() {
foo.Bar(1,"2");
}
`
Validate(source, expected, t)
}
func TestFunctionWithAssignments(t *testing.T) {
source := `package test
func foo() {
x = 1
y = 2
z = x + y
}
`
expected := `
void foo() {
x = 1;
y = 2;
z = x + y;
}
`
Validate(source, expected, t)
}
func TestFunctionWithPackageSelectorAssignments(t *testing.T) {
source := `package test
func foo() {
x = bar()
y = pkg.Bar()
z = x + y
}
`
expected := `
void foo() {
x = bar();
y = pkg.Bar();
z = x + y;
}
`
Validate(source, expected, t)
}
func TestFunctionIdentMapping(t *testing.T) {
source := `package test
func foo() {
serial.Begin()
}
`
expected := `
void foo() {
Serial.begin();
}
`
Validate(source, expected, t)
}
func TestFunctionWithIdentParam(t *testing.T) {
source := `package test
func foo() {
foo.Bar(1,"2",digital.Low)
}
`
expected := `
void foo() {
foo.Bar(1,"2",LOW);
}
`
Validate(source, expected, t)
}
func TestFunctionWithFunctionParam(t *testing.T) {
source := `package test
func foo() {
serial.Println(wifi.LocalIP())
}
`
expected := `
void foo() {
Serial.println(WiFi.localIP());
}
`
Validate(source, expected, t)
}
func TestPackageImport(t *testing.T) {
source := `package test
import "github.com/andygeiss/esp32-mqtt/business/controller"
import "github.com/andygeiss/esp32-mqtt/business/controller/serial"
import "github.com/andygeiss/esp32/business/controller/timer"
import wifi "github.com/andygeiss/esp32/business/controller/wifi"
`
expected := `
#include <WiFi.h>
`
Validate(source, expected, t)
}
func TestPackageImport_ButIgnoreController(t *testing.T) {
source := `package test
import controller "github.com/andygeiss/esp32-controller"
import "github.com/andygeiss/esp32-mqtt/business/controller/serial"
import "github.com/andygeiss/esp32/business/controller/timer"
import wifi "github.com/andygeiss/esp32/business/controller/wifi"
`
expected := `
#include <WiFi.h>
`
Validate(source, expected, t)
}

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platform/main/main.go Обычный файл
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package main
import (
"flag"
"fmt"
"github.com/andygeiss/esp32-transpiler/application/transpile"
"github.com/andygeiss/esp32-transpiler/infrastructure/ino"
"github.com/andygeiss/log"
"os"
)
func main() {
mapping, source, target := getFlags()
checkFlagsAreValid(mapping, source, target)
safeTranspile(mapping, source, target)
}
func checkFlagsAreValid(mapping, source, target string) {
if mapping == "" || source == "" || target == "" {
flag.Usage()
os.Exit(1)
}
}
func getFlags() (string, string, string) {
mapping := flag.String("mapping", fmt.Sprintf("%s/esp32/mapping.json", os.Getenv("HOME")), "API Mapping file")
source := flag.String("source", "", "Golang source file")
target := flag.String("target", "", "Arduino sketch file")
flag.Parse()
return *mapping, *source, *target
}
func printUsage() {
fmt.Print("This program transpiles Golang source into corresponding Arduino sketches.\n\n")
fmt.Print("Options:\n")
flag.PrintDefaults()
fmt.Print("\n")
fmt.Print("Example:\n")
fmt.Printf("\tesp32 -source application/blink/controller.go -target application/blink/controller.ino\n\n")
}
func safeTranspile(mapping, source, target string) {
// Read the Golang source file.
in, err := os.Open(source)
if err != nil {
log.Fatal("Go source file [%s] could not be opened! %v", source, err)
}
defer in.Close()
// Create the Arduino sketch file.
os.Remove(target)
out, err := os.OpenFile(target, os.O_CREATE|os.O_RDWR|os.O_SYNC, 0666)
if err != nil {
log.Fatal("Arduino sketch file [%s] could not be opened! %v", target, err)
}
// Transpiles the Golang source into Arduino sketch.
m := ino.NewMapping(mapping)
if err := m.Read(); err != nil {
log.Fatal("%v", err)
}
worker := ino.NewWorker(in, out, m)
trans := transpile.NewTranspiler(worker)
if err := trans.Transpile(); err != nil {
log.Fatal("%v", err)
}
}