packer/command/flag-kv/flag_json.go
hashicorp-copywrite[bot] 19055df3ec
[COMPLIANCE] License changes (#12568)
* Updating the license from MPL to Business Source License

Going forward, this project will be licensed under the Business Source License v1.1. Please see our blog post for more details at https://hashi.co/bsl-blog, FAQ at https://hashi.co/license-faq, and details of the license at www.hashicorp.com/bsl.

* Update copyright file headers to BUSL-1.1

---------

Co-authored-by: hashicorp-copywrite[bot] <110428419+hashicorp-copywrite[bot]@users.noreply.github.com>
2023-08-10 15:53:29 -07:00

37 lines
640 B
Go

// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: BUSL-1.1
package kvflag
import (
"encoding/json"
"fmt"
"os"
)
// FlagJSON is a flag.Value implementation for parsing user variables
// from the command-line using JSON files.
type FlagJSON map[string]string
func (v *FlagJSON) String() string {
return ""
}
func (v *FlagJSON) Set(raw string) error {
f, err := os.Open(raw)
if err != nil {
return err
}
defer f.Close()
if *v == nil {
*v = make(map[string]string)
}
if err := json.NewDecoder(f).Decode(v); err != nil {
return fmt.Errorf(
"Error reading variables in '%s': %s", raw, err)
}
return nil
}