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110 lines
2.6 KiB
110 lines
2.6 KiB
// Copyright 2020 Google LLC
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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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// https://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 config reads and writes hacksaw configuration data to io
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package config
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import (
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"encoding/json"
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"io"
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"io/ioutil"
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"os"
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"sync"
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)
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type Config struct {
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DefaultCodebase string
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Codebases map[string]string //key: name, value: path
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Workspaces map[string]string //key: name, value: codebase
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}
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//Read the configuration from an io.Reader
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func (c *Config) Read(input io.Reader) error {
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cfgBytes, err := ioutil.ReadAll(input)
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if err != nil {
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return err
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}
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return json.Unmarshal(cfgBytes, &c)
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}
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//Write the configuration to an io.Writer
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func (c Config) Write(output io.Writer) error {
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cfgBytes, err := json.MarshalIndent(c, "", " ")
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if err != nil {
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return err
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}
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_, err = output.Write(cfgBytes)
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return err
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}
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func (c *Config) ReadConfigFromFile(filePath string) error {
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_, err := os.Stat(filePath)
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if err != nil {
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return err
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}
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cfgFile, err := os.Open(filePath)
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if err != nil {
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return err
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}
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defer cfgFile.Close()
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err = c.Read(cfgFile)
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return err
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}
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func (c Config) WriteConfigToFile(filePath string) error {
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cfgFile, err := os.Create(filePath)
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if err != nil {
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return err
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}
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defer cfgFile.Close()
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return c.Write(cfgFile)
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}
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//Config gets a copy of the config
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func (c Config) Copy() Config {
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cfgCopy := Config{
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DefaultCodebase: c.DefaultCodebase,
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Codebases: map[string]string{},
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Workspaces: map[string]string{}}
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for name, path := range c.Codebases {
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cfgCopy.Codebases[name] = path
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}
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for name, codebase := range c.Workspaces {
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cfgCopy.Workspaces[name] = codebase
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}
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return cfgCopy
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}
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//Reset sets the config to zero values
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func (c *Config) Reset() {
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*c = Config{
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DefaultCodebase: "",
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Codebases: map[string]string{},
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Workspaces: map[string]string{}}
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}
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var singleton *Config
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var once sync.Once
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//Config gets the singleton config instance
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func GetConfig() *Config {
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once.Do(func() {
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singleton = &Config{
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DefaultCodebase: "",
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Codebases: map[string]string{},
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Workspaces: map[string]string{}}
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})
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return singleton
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}
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