forked from Joker/jade
/
main.go
210 lines (175 loc) · 4.33 KB
/
main.go
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package main
import (
"bytes"
"flag"
"fmt"
"go/ast"
"go/parser"
"go/printer"
"go/token"
"log"
"os"
"path/filepath"
"regexp"
"strconv"
"github.com/Joker/jade"
"golang.org/x/tools/imports"
)
var (
dict = map[string]string{}
lib_name = ""
outdir string
basedir string
pkg_name string
stdlib bool
stdbuf bool
writer bool
inline bool
format bool
ns_files = map[string]bool{}
)
func use() {
fmt.Printf("Usage: %s [OPTION]... [FILE]... \n", os.Args[0])
flag.PrintDefaults()
}
func init() {
flag.StringVar(&outdir, "d", "./", `directory for generated .go files`)
flag.StringVar(&basedir, "basedir", "./", `base directory for templates`)
flag.StringVar(&pkg_name, "pkg", "jade", `package name for generated files`)
flag.BoolVar(&format, "fmt", false, `HTML pretty print output for generated functions`)
flag.BoolVar(&inline, "inline", false, `inline HTML in generated functions`)
flag.BoolVar(&stdlib, "stdlib", false, `use stdlib functions`)
flag.BoolVar(&stdbuf, "stdbuf", false, `use bytes.Buffer [default bytebufferpool.ByteBuffer]`)
flag.BoolVar(&writer, "writer", false, `use io.Writer for output`)
}
//
type goAST struct {
node *ast.File
fset *token.FileSet
}
func (a *goAST) bytes(bb *bytes.Buffer) []byte {
printer.Fprint(bb, a.fset, a.node)
return bb.Bytes()
}
func parseGoSrc(fileName string, GoSrc interface{}) (out goAST, err error) {
out.fset = token.NewFileSet()
out.node, err = parser.ParseFile(out.fset, fileName, GoSrc, parser.ParseComments)
return
}
func goImports(absPath string, src []byte) []byte {
fmtOut, err := imports.Process(absPath, src, &imports.Options{TabWidth: 4, TabIndent: true, Comments: true, Fragment: true})
if err != nil {
log.Fatalln("goImports(): ", err)
}
return fmtOut
}
//
func genFile(path, outdir, pkg_name string) {
log.Printf("\nfile: %q\n", path)
var (
dir, fname = filepath.Split(path)
outPath = outdir + "/" + fname
rx, _ = regexp.Compile("[^a-zA-Z0-9]+")
constName = rx.ReplaceAllString(fname[:len(fname)-4], "")
)
wd, err := os.Getwd()
if err == nil && wd != dir && dir != "" {
os.Chdir(dir)
defer os.Chdir(wd)
}
if _, ok := ns_files[fname]; ok {
sfx := "_" + strconv.Itoa(len(ns_files))
ns_files[fname+sfx] = true
outPath += sfx
constName += sfx
} else {
ns_files[fname] = true
}
fl, err := os.ReadFile(fname)
if err != nil {
log.Fatalln("cmd/jade: ReadFile(): ", err)
}
//
jst, err := jade.New(path).Parse(fl)
if err != nil {
log.Fatalln("cmd/jade: jade.New(path).Parse(): ", err)
}
var (
bb = new(bytes.Buffer)
tpl = newLayout(constName)
)
tpl.writeBefore(bb)
before := bb.Len()
jst.WriteIn(bb)
if before == bb.Len() {
fmt.Print("generated: skipped (empty output) done.\n\n")
return
}
tpl.writeAfter(bb)
//
gst, err := parseGoSrc(outPath, bb)
if err != nil {
// TODO
bb.WriteString("\n\nERROR: parseGoSrc(): ")
bb.WriteString(err.Error())
os.WriteFile(outPath+"__Error.go", bb.Bytes(), 0644)
log.Fatalln("cmd/jade: parseGoSrc(): ", err)
}
gst.collapseWriteString(inline, constName)
gst.checkType()
gst.checkUnresolvedBlock()
bb.Reset()
fmtOut := goImports(outPath, gst.bytes(bb))
//
err = os.WriteFile(outPath+".go", fmtOut, 0644)
if err != nil {
log.Fatalln("cmd/jade: WriteFile(): ", err)
}
fmt.Printf("generated: %s.go done.\n\n", outPath)
}
func genDir(dir, outdir, pkg_name string) {
err := filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
if err != nil {
return fmt.Errorf("prevent panic by handling failure accessing a path %q: %v", dir, err)
}
if ext := filepath.Ext(info.Name()); ext == ".jade" || ext == ".pug" {
genFile(path, outdir, pkg_name)
}
return nil
})
if err != nil {
log.Fatalln(err)
}
}
//
func main() {
flag.Usage = use
flag.Parse()
if len(flag.Args()) == 0 {
use()
return
}
jade.Config(golang)
if _, err := os.Stat(outdir); os.IsNotExist(err) {
os.MkdirAll(outdir, 0755)
}
outdir, _ = filepath.Abs(outdir)
if _, err := os.Stat(basedir); !os.IsNotExist(err) && basedir != "./" {
os.Chdir(basedir)
}
for _, jadePath := range flag.Args() {
stat, err := os.Stat(jadePath)
if err != nil {
log.Fatalln(err)
}
absPath, _ := filepath.Abs(jadePath)
if stat.IsDir() {
genDir(absPath, outdir, pkg_name)
} else {
genFile(absPath, outdir, pkg_name)
}
if !stdlib {
makeJfile(stdbuf)
}
}
}