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81 lines
2.0 KiB
Go
81 lines
2.0 KiB
Go
// Copyright 2022 Woodpecker Authors
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// Copyright 2019 Laszlo Fogas
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"bytes"
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"encoding/json"
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"os"
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"strings"
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"github.com/rs/zerolog/log"
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)
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type AgentConfig struct {
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AgentID int64 `json:"agent_id"`
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}
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const defaultAgentIDValue = int64(-1)
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func readAgentConfig(agentConfigPath string) AgentConfig {
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conf := AgentConfig{
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AgentID: defaultAgentIDValue,
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}
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if agentConfigPath == "" {
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return conf
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}
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rawAgentConf, err := os.ReadFile(agentConfigPath)
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if err != nil {
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if os.IsNotExist(err) {
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log.Info().Msgf("no agent config found at '%s', start with defaults", agentConfigPath)
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} else {
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log.Error().Err(err).Msgf("could not open agent config at '%s'", agentConfigPath)
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}
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return conf
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}
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if strings.TrimSpace(string(rawAgentConf)) == "" {
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return conf
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}
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if err := json.Unmarshal(rawAgentConf, &conf); err != nil {
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log.Error().Err(err).Msg("could not parse agent config")
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}
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return conf
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}
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func writeAgentConfig(conf AgentConfig, agentConfigPath string) error {
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rawAgentConf, err := json.Marshal(conf)
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if err != nil {
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log.Error().Err(err).Msg("could not marshal agent config")
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return err
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}
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// get old config
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oldRawAgentConf, _ := os.ReadFile(agentConfigPath)
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// if config differ write to disk
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if !bytes.Equal(rawAgentConf, oldRawAgentConf) {
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if err := os.WriteFile(agentConfigPath, rawAgentConf, 0o644); err != nil {
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log.Error().Err(err).Msgf("could not persist agent config at '%s'", agentConfigPath)
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return err
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}
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}
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return nil
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}
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