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assets.go
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assets.go
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/*
* Copyright (C) 2022 Appvia Ltd <info@appvia.io>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package assets
import (
"embed"
"fmt"
)
//go:embed *.yaml.tpl
var policyFS embed.FS
// MustAsset will return a single file name asset or panic
func MustAsset(name string) []byte {
// normally for cross-OS we would use filepath lib, but due to
// embed.FS path handling: "The path separator is a forward slash,
// even on Windows systems" (more in https://pkg.go.dev/embed)
// We always must use path with embed! (even on Windows)
content, err := Asset(name)
if err != nil {
panic(fmt.Errorf("embedded asset does not exist %s - %w", name, err))
}
return content
}
// Asset will get a policy file asset or an error if it doesn't exist
func Asset(name string) ([]byte, error) {
return policyFS.ReadFile(name)
}
// AssetNames will get all the policy assets
func AssetNames() []string {
return RecursiveAssetNames(".")
}
// RecursiveAssetNames will get all the policy assets
func RecursiveAssetNames(path string) []string {
var assets []string
d, err := policyFS.ReadDir(path)
if err != nil {
panic(fmt.Errorf("something wrong - this should have been tested first"))
}
for _, f := range d {
switch {
case f.Type().IsRegular():
if path == "." {
assets = append(assets, f.Name())
} else {
assets = append(assets, fmt.Sprintf("%s/%s", path, f.Name()))
}
case f.Type().IsDir():
assets = append(assets, RecursiveAssetNames(f.Name())...)
}
}
return assets
}