embed.FS
wrapper providing additional functionality
- Get an
embed.FS
from an embedded subdirectory - Handy
Copy(sourcePath, targetPath)
method to copy an embedded file to the filesystem - 100%
embed.FS
compatible - 100% code coverage
package main
import (
"embed"
"github.com/leaanthony/debme"
"io/fs"
)
// Example Filesystem:
//
// fixtures/
// ├── test1
// | └── onefile.txt
// └── test2
// └── inner
// ├── deeper
// | └── three.txt
// ├── one.txt
// └── two.txt
//go:embed fixtures
var fixtures embed.FS
func main() {
root, _ := debme.FS(fixtures, "fixtures")
// Anchor to "fixtures/test1"
test1, _ := root.FS("test1")
files1, _ := test1.ReadDir(".")
println(len(files1)) // 1
println(files1[0].Name()) // "onefile.txt"
// Anchor to "fixtures/test2/inner"
inner, _ := root.FS("test2/inner")
one, _ := inner.ReadFile("one.txt")
println(string(one)) // "1"
// Fully compatible FS
fs.WalkDir(inner, ".", func(path string, d fs.DirEntry, err error) error {
if err != nil {
return err
}
println("Path:", path, " Name:", d.Name())
return nil
})
/*
Path: . Name: inner
Path: deeper Name: deeper
Path: deeper/three.txt Name: three.txt
Path: one.txt Name: one.txt
Path: two.txt Name: two.txt
*/
// Go deeper
deeper, _ := inner.FS("deeper")
deeperFiles, _ := deeper.ReadDir(".")
println(len(deeperFiles)) // 1
println(files1[0].Name()) // "three.txt"
// Copy files
err := deeper.Copy("three.txt", "/path/to/target.txt")
}
Go's new embed functionality is awesome! The only thing I found a little frustrating was the need to manage base paths. This module was created out of the need to embed multiple templates in the Wails CLI.