// RewritePaths returns a new AssetPack with updated input and output.
// More precisely, if the AssetPack.Input or AssetPack.Output is relative, it is prefixed
// by the `input` and `output` parameters.
func (ap AssetPack) RewritePaths(input, output string) Asset {
return AssetPack{
Input: helpers.RewritePath(input, ap.Input),
Output: helpers.RewritePath(output, ap.Output),
Pattern: ap.Pattern,
Alterations: ap.Alterations,
Dumper: FileDumper{},
}
}
// RewritePaths returns a new SingleAsset with updated input and output.
// More precisely, if the SingleAsset.Input or SingleAsset.Output path is relative, it is prefixed
// by the `input` and `output` parameters.
func (sa SingleAsset) RewritePaths(input, output string) Asset {
return SingleAsset{
Input: sa.Input.In(input),
Output: helpers.RewritePath(output, sa.Output),
Dumper: FileDumper{},
}
}
// URLFromFilename returns the url of an asset given its filename.
// It checks if the server defined in Manager.Server matches the filename.
// If not it checks all the servers defined in Manager.Servers one by one.
// If a correct server is found, the filename is rewritten into an url.
// If not, an empty string is returned.
func (m Manager) URLFromFilename(filename string) (string, error) {
filename = helpers.RewritePath(".", filename)
filename, err := filepath.Abs(filename)
if err != nil {
return "", err
}
servers := append([]Server{m.Server}, m.Servers...)
for _, s := range servers {
dir := helpers.RewritePath(m.Output, s.Directory)
dir, _ = filepath.Abs(dir)
if strings.HasPrefix(filename, dir) {
u, err := url.Parse(s.URL + "/" + filename[len(dir):])
if err == nil {
u.Path = filepath.Clean(u.Path)
return u.String(), nil
}
}
}
return "", fmt.Errorf("no server for file `%s`", filename)
}
// AssetPackSymlink returns the filename of an asset symlink.
// It does not check if the symlink exists.
func (m Manager) AssetPackSymlink(ap AssetPack, filename string) (string, error) {
ap = ap.RewritePaths(m.Input, m.Output).(AssetPack)
symlink := helpers.RewritePath(ap.Output, filename)
return filepath.Abs(symlink)
}