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new.go
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new.go
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package configfile
import (
"context"
"fmt"
"os"
"path/filepath"
"github.com/sdeoras/configio"
)
// NewManager returns instance of ConfigManager interface.
// ConfigManager should be used by clients who wish to read and write config
// and are not going to perform a watch
func NewManager(ctx context.Context, options ...interface{}) (configio.ConfigManager, error) {
manager, err := newManager(ctx, options...)
if err != nil {
return nil, err
}
if err := manager.closeWatch(); err != nil {
return nil, err
}
return manager, nil
}
// NewReader returns instance of ConfigReader interface.
// ConfigReader should be used by clients who just wish to read config and/or
// for clients who should be given read permissions only
func NewReader(ctx context.Context, options ...interface{}) (configio.ConfigReader, error) {
manager, err := newManager(ctx, options...)
if err != nil {
return nil, err
}
if err := manager.closeWatch(); err != nil {
return nil, err
}
return manager, nil
}
// NewWriter returns instance of ConfigWriter interface.
// ConfigWriter should be used by clients who just wish to write config and/or
// for clients who should be given write permissions only
func NewWriter(ctx context.Context, options ...interface{}) (configio.ConfigWriter, error) {
manager, err := newManager(ctx, options...)
if err != nil {
return nil, err
}
if err := manager.closeWatch(); err != nil {
return nil, err
}
return manager, nil
}
// NewWatcher returns an instance of ConfigWatcher interface.
// ConfigWatcher should be used by clients who only wish to watch config changes
func NewWatcher(ctx context.Context, options ...interface{}) (configio.ConfigWatcher, error) {
manager, err := newManager(ctx, options...)
if err != nil {
return nil, err
}
if err := manager.closeWatch(); err != nil {
return nil, err
}
return manager, nil
}
// NewManagerWithWatch returns instance of ConfigManagerWithWatch interface.
// ConfigManagerWithWatch should be used by clients requiring full config management
// features
func NewManagerWithWatch(ctx context.Context, options ...interface{}) (configio.ConfigManagerWithWatch, error) {
return newManager(ctx, options...)
}
// newManager returns instance of manager struct
func newManager(ctx context.Context, options ...interface{}) (*manager, error) {
m := new(manager).Init(ctx)
opt := make(map[string]interface{})
for i, option := range options {
if i%2 != 0 {
continue
}
key, ok := option.(string)
if !ok {
return nil, fmt.Errorf("options need to be in the format key, value. key is a string")
}
if i < len(options)-1 {
opt[key] = options[i+1]
}
}
if option, present := opt[OptFilePath]; present {
if file, ok := option.(string); !ok {
return nil, fmt.Errorf("option value for file should be a string")
} else {
if err := m.setConfigFile(file); err != nil {
return nil, err
}
}
} else {
home := os.Getenv("HOME")
file := filepath.Join(home, ".config", defaultConfigDir, defaultConfigFile)
if err := m.setConfigFile(file); err != nil {
return nil, err
}
}
return m, nil
}