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// Command qtc is a compiler for quicktemplate files.
//
// See https://github.com/valyala/quicktemplate/qtc for details.
package main
import (
"flag"
"go/format"
"io/ioutil"
"log"
"os"
"path/filepath"
"sort"
"strings"
"github.com/valyala/quicktemplate/parser"
)
var (
dir = flag.String("dir", ".", "Path to directory with template files to compile. "+
"Only files with ext extension are compiled. See ext flag for details.\n"+
"The compiler recursively processes all the subdirectories.\n"+
"Compiled template files are placed near the original file with .go extension added.")
file = flag.String("file", "", "Path to template file to compile.\n"+
"Flags -dir and -ext are ignored if file is set.\n"+
"The compiled file will be placed near the original file with .go extension added.")
ext = flag.String("ext", "qtpl", "Only files with this extension are compiled")
skipLineComments = flag.Bool("skipLineComments", false, "Don't write line comments")
)
var logger = log.New(os.Stderr, "qtc: ", log.LstdFlags)
var filesCompiled int
func main() {
flag.Parse()
if len(*file) > 0 {
compileSingleFile(*file)
return
}
if len(*ext) == 0 {
logger.Fatalf("ext cannot be empty")
}
if len(*dir) == 0 {
*dir = "."
}
if (*ext)[0] != '.' {
*ext = "." + *ext
}
logger.Printf("Compiling *%s template files in directory %q", *ext, *dir)
compileDir(*dir)
logger.Printf("Total files compiled: %d", filesCompiled)
}
func compileSingleFile(filename string) {
fi, err := os.Stat(filename)
if err != nil {
logger.Fatalf("cannot stat file %q: %s", filename, err)
}
if fi.IsDir() {
logger.Fatalf("cannot compile directory %q. Use -dir flag", filename)
}
compileFile(filename)
}
func compileDir(path string) {
fi, err := os.Stat(path)
if err != nil {
logger.Fatalf("cannot compile files in %q: %s", path, err)
}
if !fi.IsDir() {
logger.Fatalf("cannot compile files in %q: it is not directory", path)
}
d, err := os.Open(path)
if err != nil {
logger.Fatalf("cannot compile files in %q: %s", path, err)
}
defer d.Close()
fis, err := d.Readdir(-1)
if err != nil {
logger.Fatalf("cannot read files in %q: %s", path, err)
}
var names []string
for _, fi = range fis {
name := fi.Name()
if name == "." || name == ".." {
continue
}
if !fi.IsDir() {
names = append(names, name)
} else {
subPath := filepath.Join(path, name)
compileDir(subPath)
}
}
sort.Strings(names)
for _, name := range names {
if strings.HasSuffix(name, *ext) {
filename := filepath.Join(path, name)
compileFile(filename)
}
}
}
func compileFile(infile string) {
outfile := infile + ".go"
logger.Printf("Compiling %q to %q...", infile, outfile)
inf, err := os.Open(infile)
if err != nil {
logger.Fatalf("cannot open file %q: %s", infile, err)
}
tmpfile := outfile + ".tmp"
outf, err := os.Create(tmpfile)
if err != nil {
logger.Fatalf("cannot create file %q: %s", tmpfile, err)
}
packageName, err := getPackageName(infile)
if err != nil {
logger.Fatalf("cannot determine package name for %q: %s", infile, err)
}
parseFunc := parser.Parse
if *skipLineComments {
parseFunc = parser.ParseNoLineComments
}
if err = parseFunc(outf, inf, infile, packageName); err != nil {
logger.Fatalf("error when parsing file %q: %s", infile, err)
}
if err = outf.Close(); err != nil {
logger.Fatalf("error when closing file %q: %s", tmpfile, err)
}
if err = inf.Close(); err != nil {
logger.Fatalf("error when closing file %q: %s", infile, err)
}
// prettify the output file
uglyCode, err := ioutil.ReadFile(tmpfile)
if err != nil {
logger.Fatalf("cannot read file %q: %s", tmpfile, err)
}
prettyCode, err := format.Source(uglyCode)
if err != nil {
logger.Fatalf("error when formatting compiled code for %q: %s. See %q for details", infile, err, tmpfile)
}
if err = ioutil.WriteFile(outfile, prettyCode, 0666); err != nil {
logger.Fatalf("error when writing file %q: %s", outfile, err)
}
if err = os.Remove(tmpfile); err != nil {
logger.Fatalf("error when removing file %q: %s", tmpfile, err)
}
filesCompiled++
}
func getPackageName(filename string) (string, error) {
filenameAbs, err := filepath.Abs(filename)
if err != nil {
return "", err
}
dir, _ := filepath.Split(filenameAbs)
return filepath.Base(dir), nil
}
|
