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package main
import (
"fmt"
"os"
"path/filepath"
"text/template"
)
func apply(conf *Conf, args []string) error {
if len(args) != 0 {
return applyFiles(conf, args)
}
names, err := getFileNames(conf)
if err != nil {
return err
}
return applyFiles(conf, names)
}
func applyFiles(conf *Conf, names []string) error {
for _, name := range names {
fmt.Printf("applying %s\n", name)
if err := applyFile(conf, name); err != nil {
return fmt.Errorf("could not apply %s: %v", name, err)
}
}
return nil
}
func applyFile(conf *Conf, name string) error {
src := filepath.Join(conf.Source, "templates", name)
t, err := template.New(filepath.Base(name)).Funcs(buildFuncMap()).ParseFiles(src)
if err != nil {
return fmt.Errorf("could not build template: %v", err)
}
data, err := getTemplateData(conf)
if err != nil {
return err
}
dest := filepath.Join(conf.Dest, name)
if err = os.MkdirAll(filepath.Dir(dest), 0700); err != nil {
return err
}
srcInfo, err := os.Stat(src)
if err != nil {
return err
}
out, err := os.OpenFile(dest, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, srcInfo.Mode())
if err != nil {
return err
}
defer out.Close()
if err = t.Execute(out, data); err != nil {
return fmt.Errorf("could not execute template: %v", err)
}
return nil
}
func getFileNames(c *Conf) ([]string, error) {
var names []string
dir := filepath.Join(c.Source, "templates")
err := filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
if info.IsDir() {
return nil
}
name, err := filepath.Rel(dir, path)
if err != nil {
return err
}
names = append(names, name)
return nil
})
if err != nil {
return nil, err
}
return names, nil
}
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