feat: use bytes instead of string to be able to generate binary files, started implementing PHP-like server.

.gitignore

@@ -1 +1 @@
-pp
+/tpp

build.sh

@@ -1,3 +1,3 @@
 #!/bin/sh
 #
-go build ./cmd/pp
+go build ./cmd/tpp

cmd/tenserve/main.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"flag"
+	"net/http"
+	"vultras.su/util/tpp/server"
+)
+
+func main() {
+	var (
+		addr, src string
+	)
+
+	flag.StringVar(&addr, "http", ":8080", "HTTP address to serve")
+	flag.StringVar(&src, "src", "", "path to the source directory")
+	srv := http.Server{
+		Address: addr,
+		Handler: &server.Handler{
+			SourcePath: src,
+		},
+	}
+
+	log.Fatal(srv.ListenAndServe())
+}
+

cmd/tpp/main.go

@@ -0,0 +1,10 @@
+package main
+
+import (
+	"vultras.su/util/tpp"
+	"os"
+)
+
+func main() {
+	tpp.Tool.Run(os.Args[1:])
+}

errors.go

@@ -1,4 +1,4 @@
-package pp
+package tpp
 
 import (
 	//"errors"

eval.go

@@ -1,6 +1,6 @@
-package pp
+package tpp
 
 type Evaler interface {
 	Tags() [2]string
-	Eval(string, []string) ([]string, error)
+	Eval(filePath string, pieces []string) ([]string, error)
 }

go.mod

@@ -1,4 +1,4 @@
-module vultras.su/util/pp
+module vultras.su/util/tpp
 
 go 1.21.7
 

main.go

@@ -1,43 +1,52 @@
-package pp
+package tpp
 
 import (
-	"strings"
-	"fmt"
+	//"fmt"
+	"bytes"
+	"context"
 )
 
+
 type Preprocessor struct {
-	evaler Evaler
-	tags [2]string
+	tengo *Tengo
+	tags [2][]byte
 }
 
 // Get the new preprocessor with default options.
-func NewPp(evaler Evaler) *Preprocessor {
-	pp := &Preprocessor{
-		tags: evaler.Tags(),
+func New(tengo *Tengo ) *Preprocessor {
+	pp := &Preprocessor{}
+	pp.tengo = tengo
+	pp.tags = [2][]byte{
+		[]byte("{{"),
+		[]byte("}}"),
 	}
-	pp.evaler = evaler
 	return pp
 }
 
-func (pp *Preprocessor) Process(filePath string, data string) (string, error) {
-	var b strings.Builder
+func (pp *Preprocessor) Process(
+	ctx context.Context,
+	recompile bool,
+	filePath string,
+	data []byte,
+) ([]byte, error) {
+	var b bytes.Buffer
 	last := 0
-	texts := []string{}
-	codes := []string{}
+	texts := [][]byte{}
+	codes := [][]byte{}
 	for {
-		idxStart := strings.Index(data[last:], pp.tags[0])
-		idxEnd := strings.Index(data[last:], pp.tags[1])
+		idxStart := bytes.Index(data[last:], pp.tags[0])
+		idxEnd := bytes.Index(data[last:], pp.tags[1])
 		//fmt.Printf("cock %d %d %d\n", last, idxStart, idxEnd)
 		if idxStart < 0 {
 			if idxEnd >= 0 {
-				return "", UnexpectedError{
+				return nil, UnexpectedError{
 					What: "end tag",
 				}
 			}
 			texts = append(texts, data[last:])
 			break
 		} else if idxEnd < 0 {
-			return "", UnexpectedError{
+			return nil, UnexpectedError{
 				What: "start tag",
 			}
 		}
@@ -52,17 +61,23 @@ func (pp *Preprocessor) Process(filePath string, data string) (string, error) {
 			data = data[1:]
 		}*/
 	}
-	codeRets, err := pp.evaler.Eval(filePath, codes)
+	codeRets, err := pp.tengo.Eval(
+		ctx,
+		recompile,
+		filePath,
+		codes,
+	)
 	if err != nil {
-		return "", err
+		return nil, err
 	}
 
 	for i, codeRet := range codeRets {
-		fmt.Fprint(&b, texts[i])
-		fmt.Fprintf(&b, codeRet)
+		b.Write(texts[i])
+		b.Write(codeRet)
 	}
-	fmt.Fprint(&b, texts[len(codeRets)])
 	
-	return b.String(), nil
+	b.Write(texts[len(codeRets)])
+
+	return b.Bytes(), nil
 }
 

server/handler.go

@@ -0,0 +1,26 @@
+package server
+
+import (
+	"net/http"
+	"path"
+	"os"
+)
+
+var _ = http.Handler(&Handler{})
+
+// The type describes behaviour
+// of handling stuff like in PHP.
+type Handler struct {
+	// THe field represents
+	// where we store site's
+	// source files and request handlers.
+	SourcePath string
+}
+
+func (h *Handler) ServeHTTP(
+	w http.ResponseWriter,
+	r *http.Request,
+) {
+	p := r.URL.Path
+	p = path.Clean(p)
+}

tengo.go

@@ -1,32 +1,63 @@
-package pp
+package tpp
 
 import (
 	"github.com/d5/tengo/v2"
-	"github.com/d5/tengo/v2/stdlib"
 	"fmt"
 	"context"
+	"bytes"
 )
 
+type Script = tengo.Script
+type Compiled = tengo.Compiled
+
 type Tengo struct {
 	head string
-	modules *tengo.ModuleMap
+	compiledScripts map[string] *Compiled
+	// Functions to modify
+	// preprocessor for
+	// more specific purposes.
+	preCode func() []byte
+	postCode func() []byte
+	preCompile func(*Script)
 }
 
+// Returns the new Tengo preprocessor
+// with 
 func NewTengo() *Tengo {
-	evaler := &Tengo{}
-	evaler.modules = stdlib.GetModuleMap(stdlib.AllModuleNames()...)
-	return evaler
+	ret := &Tengo{}
+	return ret
+}
+
+func (tengo *Tengo) SetPreCode(fn func() []byte) *Tengo {
+	tengo.preCode = fn
+	return tengo
+}
+
+func (tengo *Tengo) SetPostCode(fn func() []byte) *Tengo {
+	tengo.postCode = fn
+	return tengo
+}
+
+func (tengo *Tengo) SetPreCompile(fn func(*Script)) *Tengo {
+	tengo.preCompile = fn
+	return tengo
 }
 
 func (pp *Tengo) Tags() [2]string {
 	return [2]string{
-		"<?",
-		"?>",
+		"{{",
+		"}}",
 	}
 }
 
 // Simple Evaler implementation for the Tengo language
-func (pp *Tengo) Eval(filePath string, codes []string) ([]string, error) {
+func (pp *Tengo) Eval(
+	ctx context.Context,
+	recompile bool,
+	filePath string,
+	codes [][]byte,
+) ([][]byte, error) {
+	var fullCodeBuf bytes.Buffer
 	const retHead = `
 		__ret_one__ := ""
 		printf := func(format, ...vals) {
@@ -43,20 +74,28 @@ func (pp *Tengo) Eval(filePath string, codes []string) ([]string, error) {
 	`
 
 	const retSeparator = `
-		__Separate(__ret_one__)
+		__separate(__ret_one__)
 		__ret_one__ = ""
 	`
-	rets := []string{}
+	rets := [][]byte{}
 
 
-	fullCode := retHead + "\n" + pp.head
-	for _, code := range codes {
-		fullCode += "\n" + code + retSeparator + "\n"
+	fmt.Fprint(&fullCodeBuf, retHead)
+	if pp.preCode != nil {
+		fullCodeBuf.Write(pp.preCode())
 	}
-	script := tengo.NewScript([]byte(fullCode))
-	script.SetImports(pp.modules)
-	script.EnableFileImport(true)
-	script.SetImportDir(".")
+	for _, code := range codes {
+		fmt.Fprintln(&fullCodeBuf, "\n" + string(code) + retSeparator)
+	}
+	if pp.postCode != nil {
+		fullCodeBuf.Write(pp.postCode())
+	}
+
+	script := tengo.NewScript(fullCodeBuf.Bytes())
+	if pp.preCompile != nil {
+		pp.preCompile(script)
+	}
+
 	err := script.Add("sprintf", &tengo.UserFunction{
 			Value: func(args ...tengo.Object) (tengo.Object, error){
 				if len(args) < 1 {
@@ -109,12 +148,12 @@ func (pp *Tengo) Eval(filePath string, codes []string) ([]string, error) {
 	if err != nil {
 		return nil, err
 	}
-	err = script.Add("__Separate", &tengo.UserFunction{
+	err = script.Add("__separate", &tengo.UserFunction{
 			Value: func(args ...tengo.Object) (tengo.Object, error){
 				if len(args) < 1 {
 					return nil, tengo.ErrWrongNumArguments
 				}
-				str, ok := tengo.ToString(args[0])
+				str, ok := tengo.ToByteSlice(args[0])
 				if !ok {
 					return nil, tengo.ErrInvalidArgumentType{
 					}
@@ -128,7 +167,7 @@ func (pp *Tengo) Eval(filePath string, codes []string) ([]string, error) {
 		return nil, err
 	}
 
-	_, err = script.RunContext(context.Background())
+	_, err = script.RunContext(ctx)
 	if err != nil {
 		return nil, err
 	}

tests/index.md.pp

@@ -1,20 +1,20 @@
-<?
+{{
 	os := import("os")
 	shit := import("./tests/shit.tengo")
 	newVar := "'this is gen shita'"
 	println(shit.some_func())
-?># The index testing
-	1 + 1 = <? print(1+1) ?>
-	cock <? print(newVar, "and cock")?>
+}}# The index testing
+	1 + 1 = {{ print(1+1) }}
+	cock {{ print(newVar, "and cock") }}
 
 ## The shit after
 
-checking <? printf(newVar) ?>
+checking {{ printf(newVar) }}
 
 ## File contents
 
-<?
+{{
 	bts := os.read_file("tests/somefile")
 	printf("%v\n%s", bts, bts)
-?>
+}}
 

tool.go

@@ -1,15 +1,26 @@
-package pp
+package tpp
 
 import (
+	//"github.com/d5/tengo/v2"
+	"github.com/d5/tengo/v2/stdlib"
 	"vultras.su/core/cli/mtool"
-	"fmt"
+	//"fmt"
 	"os"
 	"log"
 	"path/filepath"
+	"context"
 )
 
 var Tool = mtool.T("pp").Func(func(flags *mtool.Flags){
-	pp := NewPp(NewTengo())
+	t := NewTengo().
+		SetPreCompile(func(s *Script){
+			s.SetImports(stdlib.GetModuleMap(
+				stdlib.AllModuleNames()...,
+			))
+			s.EnableFileImport(true)
+			s.SetImportDir(".")
+		})
+	pp := New(t)
 	filePaths := flags.Parse()
 	for _, filePath := range filePaths {
 		pth := filepath.FromSlash(filePath)
@@ -18,11 +29,16 @@ var Tool = mtool.T("pp").Func(func(flags *mtool.Flags){
 			log.Println("read error:", err)
 			continue
 		}
-		str, err := pp.Process(pth, string(bts))
+		out, err := pp.Process(
+			context.Background(),
+			true,
+			pth,
+			bts,
+		)
 		if err != nil {
 			log.Println("pp error:", err)
 			continue
 		}
-		fmt.Print(str)
+		os.Stdout.Write(out)
 	}
 })