84 lines
2.2 KiB
Go
84 lines
2.2 KiB
Go
// Copyright 2014 The go-ethereum Authors
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// This file is part of go-ethereum.
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//
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// go-ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// go-ethereum is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
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package common
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import (
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"flag"
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"fmt"
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"os"
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"github.com/rakyll/globalconf"
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)
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// Config struct
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type ConfigManager struct {
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ExecPath string
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Debug bool
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Diff bool
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DiffType string
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Paranoia bool
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VmType int
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conf *globalconf.GlobalConf
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}
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// Read config
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//
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// Initialize Config from Config File
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func ReadConfig(ConfigFile string, Datadir string, EnvPrefix string) *ConfigManager {
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if !FileExist(ConfigFile) {
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// create ConfigFile if it does not exist, otherwise
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// globalconf will panic when trying to persist flags.
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fmt.Printf("config file '%s' doesn't exist, creating it\n", ConfigFile)
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os.Create(ConfigFile)
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}
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g, err := globalconf.NewWithOptions(&globalconf.Options{
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Filename: ConfigFile,
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EnvPrefix: EnvPrefix,
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})
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if err != nil {
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fmt.Println(err)
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} else {
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g.ParseAll()
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}
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cfg := &ConfigManager{ExecPath: Datadir, Debug: true, conf: g, Paranoia: true}
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return cfg
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}
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// provides persistence for flags
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func (c *ConfigManager) Save(key string, value interface{}) {
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f := &flag.Flag{Name: key, Value: newConfValue(value)}
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c.conf.Set("", f)
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}
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func (c *ConfigManager) Delete(key string) {
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c.conf.Delete("", key)
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}
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// private type implementing flag.Value
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type confValue struct {
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value string
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}
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// generic constructor to allow persising non-string values directly
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func newConfValue(value interface{}) *confValue {
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return &confValue{fmt.Sprintf("%v", value)}
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}
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func (self confValue) String() string { return self.value }
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func (self confValue) Set(s string) error { self.value = s; return nil }
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