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params.go
42 lines (36 loc) · 1.2 KB
/
params.go
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// Copyright 2023 The Inspektor Gadget authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package common
import (
"fmt"
"os"
"strings"
"github.com/inspektor-gadget/inspektor-gadget/pkg/params"
)
const FilePrefix = "@"
// Param is a wrapper around params.Param. It's used to implement the logic that reads parameters from files.
type Param struct {
*params.Param
}
func (p *Param) Set(val string) error {
if strings.HasPrefix(val, FilePrefix) {
filepath := strings.TrimPrefix(val, FilePrefix)
data, err := os.ReadFile(filepath)
if err != nil {
return fmt.Errorf("reading file %q for parameter %q: %w", filepath, p.Key, err)
}
return p.Param.Set(string(data))
}
return p.Param.Set(val)
}