autobrr/web/build.go
soup 0391629862
chore(license): update copyright year in headers (#1929)
* chore: update copyright year in license headers

* Revert "chore: update copyright year in license headers"

This reverts commit 3e58129c431b9a491089ce36b908f9bb6ba38ed3.

* chore: update copyright year in license headers

* fix: sort go imports

* fix: add missing license headers
2025-01-06 22:23:19 +01:00

62 lines
1.7 KiB
Go

// Copyright (c) 2021 - 2025, Ludvig Lundgren and the autobrr contributors.
// SPDX-License-Identifier: GPL-2.0-or-later
// Package web web/build.go
package web
import (
"embed"
"fmt"
"io/fs"
"os"
"path/filepath"
)
var (
//go:embed all:dist
Dist embed.FS
DistDirFS = MustSubFS(Dist, "dist")
)
type defaultFS struct {
prefix string
fs fs.FS
}
func (fs defaultFS) Open(name string) (fs.File, error) {
if fs.fs == nil {
return os.Open(name)
}
return fs.fs.Open(name)
}
// MustSubFS creates sub FS from current filesystem or panic on failure.
// Panic happens when `fsRoot` contains invalid path according to `fs.ValidPath` rules.
//
// MustSubFS is helpful when dealing with `embed.FS` because for example `//go:embed assets/images` embeds files with
// paths including `assets/images` as their prefix. In that case use `fs := MustSubFS(fs, "rootDirectory") to
// create sub fs which uses necessary prefix for directory path.
func MustSubFS(currentFs fs.FS, fsRoot string) fs.FS {
subFs, err := subFS(currentFs, fsRoot)
if err != nil {
panic(fmt.Errorf("can not create sub FS, invalid root given, err: %w", err))
}
return subFs
}
func subFS(currentFs fs.FS, root string) (fs.FS, error) {
root = filepath.ToSlash(filepath.Clean(root)) // note: fs.FS operates only with slashes. `ToSlash` is necessary for Windows
if dFS, ok := currentFs.(*defaultFS); ok {
// we need to make exception for `defaultFS` instances as it interprets root prefix differently from fs.FS.
// fs.Fs.Open does not like relative paths ("./", "../") and absolute paths.
if !filepath.IsAbs(root) {
root = filepath.Join(dFS.prefix, root)
}
return &defaultFS{
prefix: root,
fs: os.DirFS(root),
}, nil
}
return fs.Sub(currentFs, root)
}