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gitea/modules/setting/config_provider.go

222 lines
6.3 KiB
Go

// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package setting
import (
"fmt"
"os"
"path/filepath"
"strings"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/util"
ini "gopkg.in/ini.v1"
)
type ConfigSection interface {
Name() string
MapTo(interface{}) error
HasKey(key string) bool
NewKey(name, value string) (*ini.Key, error)
Key(key string) *ini.Key
Keys() []*ini.Key
ChildSections() []*ini.Section
}
// ConfigProvider represents a config provider
type ConfigProvider interface {
Section(section string) ConfigSection
NewSection(name string) (ConfigSection, error)
GetSection(name string) (ConfigSection, error)
Save() error
}
// ConfigSectionKey only searches the keys in the given section, but it is O(n).
// ini package has a special behavior: with "[sec] a=1" and an empty "[sec.sub]",
// then in "[sec.sub]", Key()/HasKey() can always see "a=1" because it always tries parent sections.
// It returns nil if the key doesn't exist.
func ConfigSectionKey(sec ConfigSection, key string) *ini.Key {
if sec == nil {
return nil
}
for _, k := range sec.Keys() {
if k.Name() == key {
return k
}
}
return nil
}
func ConfigSectionKeyString(sec ConfigSection, key string, def ...string) string {
k := ConfigSectionKey(sec, key)
if k != nil && k.String() != "" {
return k.String()
}
if len(def) > 0 {
return def[0]
}
return ""
}
// ConfigInheritedKey works like ini.Section.Key(), but it always returns a new key instance, it is O(n) because NewKey is O(n)
// and the returned key is safe to be used with "MustXxx", it doesn't change the parent's values.
// Otherwise, ini.Section.Key().MustXxx would pollute the parent section's keys.
// It never returns nil.
func ConfigInheritedKey(sec ConfigSection, key string) *ini.Key {
k := sec.Key(key)
if k != nil && k.String() != "" {
newKey, _ := sec.NewKey(k.Name(), k.String())
return newKey
}
newKey, _ := sec.NewKey(key, "")
return newKey
}
func ConfigInheritedKeyString(sec ConfigSection, key string, def ...string) string {
k := sec.Key(key)
if k != nil && k.String() != "" {
return k.String()
}
if len(def) > 0 {
return def[0]
}
return ""
}
type iniFileConfigProvider struct {
opts *Options
*ini.File
newFile bool // whether the file has not existed previously
}
// NewConfigProviderFromData this function is only for testing
func NewConfigProviderFromData(configContent string) (ConfigProvider, error) {
var cfg *ini.File
var err error
if configContent == "" {
cfg = ini.Empty()
} else {
cfg, err = ini.Load(strings.NewReader(configContent))
if err != nil {
return nil, err
}
}
cfg.NameMapper = ini.SnackCase
return &iniFileConfigProvider{
File: cfg,
newFile: true,
}, nil
}
type Options struct {
CustomConf string // the ini file path
AllowEmpty bool // whether not finding configuration files is allowed (only true for the tests)
ExtraConfig string
DisableLoadCommonSettings bool
}
// newConfigProviderFromFile load configuration from file.
// NOTE: do not print any log except error.
func newConfigProviderFromFile(opts *Options) (*iniFileConfigProvider, error) {
cfg := ini.Empty()
newFile := true
if opts.CustomConf != "" {
isFile, err := util.IsFile(opts.CustomConf)
if err != nil {
return nil, fmt.Errorf("unable to check if %s is a file. Error: %v", opts.CustomConf, err)
}
if isFile {
if err := cfg.Append(opts.CustomConf); err != nil {
return nil, fmt.Errorf("failed to load custom conf '%s': %v", opts.CustomConf, err)
}
newFile = false
}
}
if newFile && !opts.AllowEmpty {
return nil, fmt.Errorf("unable to find configuration file: %q, please ensure you are running in the correct environment or set the correct configuration file with -c", CustomConf)
}
if opts.ExtraConfig != "" {
if err := cfg.Append([]byte(opts.ExtraConfig)); err != nil {
return nil, fmt.Errorf("unable to append more config: %v", err)
}
}
cfg.NameMapper = ini.SnackCase
return &iniFileConfigProvider{
opts: opts,
File: cfg,
newFile: newFile,
}, nil
}
func (p *iniFileConfigProvider) Section(section string) ConfigSection {
return p.File.Section(section)
}
func (p *iniFileConfigProvider) NewSection(name string) (ConfigSection, error) {
return p.File.NewSection(name)
}
func (p *iniFileConfigProvider) GetSection(name string) (ConfigSection, error) {
return p.File.GetSection(name)
}
// Save save the content into file
func (p *iniFileConfigProvider) Save() error {
if p.opts.CustomConf == "" {
if !p.opts.AllowEmpty {
return fmt.Errorf("custom config path must not be empty")
}
return nil
}
if p.newFile {
if err := os.MkdirAll(filepath.Dir(CustomConf), os.ModePerm); err != nil {
return fmt.Errorf("failed to create '%s': %v", CustomConf, err)
}
}
if err := p.SaveTo(p.opts.CustomConf); err != nil {
return fmt.Errorf("failed to save '%s': %v", p.opts.CustomConf, err)
}
// Change permissions to be more restrictive
fi, err := os.Stat(CustomConf)
if err != nil {
return fmt.Errorf("failed to determine current conf file permissions: %v", err)
}
if fi.Mode().Perm() > 0o600 {
if err = os.Chmod(CustomConf, 0o600); err != nil {
log.Warn("Failed changing conf file permissions to -rw-------. Consider changing them manually.")
}
}
return nil
}
// a file is an implementation ConfigProvider and other implementations are possible, i.e. from docker, k8s, …
var _ ConfigProvider = &iniFileConfigProvider{}
func mustMapSetting(rootCfg ConfigProvider, sectionName string, setting interface{}) {
if err := rootCfg.Section(sectionName).MapTo(setting); err != nil {
log.Fatal("Failed to map %s settings: %v", sectionName, err)
}
}
func deprecatedSetting(rootCfg ConfigProvider, oldSection, oldKey, newSection, newKey, version string) {
if rootCfg.Section(oldSection).HasKey(oldKey) {
log.Error("Deprecated fallback `[%s]` `%s` present. Use `[%s]` `%s` instead. This fallback will be/has been removed in %s", oldSection, oldKey, newSection, newKey, version)
}
}
// deprecatedSettingDB add a hint that the configuration has been moved to database but still kept in app.ini
func deprecatedSettingDB(rootCfg ConfigProvider, oldSection, oldKey string) {
if rootCfg.Section(oldSection).HasKey(oldKey) {
log.Error("Deprecated `[%s]` `%s` present which has been copied to database table sys_setting", oldSection, oldKey)
}
}