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package source
import (
"errors"
"io"
"os"
"path"
"path/filepath"
)
type Input interface {
Files() []*File
}
type File struct {
name string
LogicalName string
Contents io.Reader
Section string
Dir string
}
type Filesystem struct {
files []*File
Base string
AvoidPaths []string
}
func (f *Filesystem) Files() []*File {
if len(f.files)<1 {f.captureFiles()}
return f.files
}
var errMissingBaseDir = errors.New("source: missing base directory")
func (f *Filesystem) add(name string, reader io.Reader) (err error) {
if name, err = f.getRelativePath(name); err != nil {
return err
}
dir, logical := path.Split(name)
_, section := path.Split(path.Dir(name))
if section == "." {
section = ""
}
f.files = append(f.files, &File{
name: name,
LogicalName: logical,
Contents: reader,
Section: section,
Dir: dir,
})
return
}
func (f *Filesystem) getRelativePath(name string) (final string, err error) {
if filepath.IsAbs(name) && f.Base == "" {
return "", errMissingBaseDir
}
name = filepath.Clean(name)
base := filepath.Clean(f.Base)
name, err = filepath.Rel(base, name)
if err != nil {
return "", err
}
name = filepath.ToSlash(name)
return name, nil
}
func (f *Filesystem) captureFiles() {
walker := func(filePath string, fi os.FileInfo, err error) error {
if err != nil {
return nil
}
if fi.IsDir() {
if f.avoid(filePath) {
return filepath.SkipDir
}
return nil
} else {
if ignoreDotFile(filePath) {
return nil
}
file, err := os.Open(filePath)
if err != nil {
return err
}
f.add(filePath, file)
return nil
}
}
filepath.Walk(f.Base, walker)
}
func (f *Filesystem) avoid(filePath string) bool {
for _, avoid := range f.AvoidPaths {
if avoid == filePath {
return true
}
}
return false
}
func ignoreDotFile(filePath string) bool {
return filepath.Base(filePath)[0] == '.'
}
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