forgejo/modules/doctor/doctor.go
wxiaoguang 4647660776
Rewrite logger system (#24726)
## ⚠️ Breaking

The `log.<mode>.<logger>` style config has been dropped. If you used it,
please check the new config manual & app.example.ini to make your
instance output logs as expected.

Although many legacy options still work, it's encouraged to upgrade to
the new options.

The SMTP logger is deleted because SMTP is not suitable to collect logs.

If you have manually configured Gitea log options, please confirm the
logger system works as expected after upgrading.

## Description

Close #12082 and maybe more log-related issues, resolve some related
FIXMEs in old code (which seems unfixable before)

Just like rewriting queue #24505 : make code maintainable, clear legacy
bugs, and add the ability to support more writers (eg: JSON, structured
log)

There is a new document (with examples): `logging-config.en-us.md`

This PR is safer than the queue rewriting, because it's just for
logging, it won't break other logic.

## The old problems

The logging system is quite old and difficult to maintain:
* Unclear concepts: Logger, NamedLogger, MultiChannelledLogger,
SubLogger, EventLogger, WriterLogger etc
* Some code is diffuclt to konw whether it is right:
`log.DelNamedLogger("console")` vs `log.DelNamedLogger(log.DEFAULT)` vs
`log.DelLogger("console")`
* The old system heavily depends on ini config system, it's difficult to
create new logger for different purpose, and it's very fragile.
* The "color" trick is difficult to use and read, many colors are
unnecessary, and in the future structured log could help
* It's difficult to add other log formats, eg: JSON format
* The log outputer doesn't have full control of its goroutine, it's
difficult to make outputer have advanced behaviors
* The logs could be lost in some cases: eg: no Fatal error when using
CLI.
* Config options are passed by JSON, which is quite fragile.
* INI package makes the KEY in `[log]` section visible in `[log.sub1]`
and `[log.sub1.subA]`, this behavior is quite fragile and would cause
more unclear problems, and there is no strong requirement to support
`log.<mode>.<logger>` syntax.


## The new design

See `logger.go` for documents.


## Screenshot

<details>


![image](https://github.com/go-gitea/gitea/assets/2114189/4462d713-ba39-41f5-bb08-de912e67e1ff)


![image](https://github.com/go-gitea/gitea/assets/2114189/b188035e-f691-428b-8b2d-ff7b2199b2f9)


![image](https://github.com/go-gitea/gitea/assets/2114189/132e9745-1c3b-4e00-9e0d-15eaea495dee)

</details>

## TODO

* [x] add some new tests
* [x] fix some tests
* [x] test some sub-commands (manually ....)

---------

Co-authored-by: Jason Song <i@wolfogre.com>
Co-authored-by: delvh <dev.lh@web.de>
Co-authored-by: Giteabot <teabot@gitea.io>
2023-05-21 22:35:11 +00:00

123 lines
3.4 KiB
Go

// Copyright 2020 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package doctor
import (
"context"
"fmt"
"os"
"sort"
"strings"
"code.gitea.io/gitea/models/db"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
)
// Check represents a Doctor check
type Check struct {
Title string
Name string
IsDefault bool
Run func(ctx context.Context, logger log.Logger, autofix bool) error
AbortIfFailed bool
SkipDatabaseInitialization bool
Priority int
}
func initDBSkipLogger(ctx context.Context) error {
setting.Init(&setting.Options{})
setting.LoadDBSetting()
if err := db.InitEngine(ctx); err != nil {
return fmt.Errorf("db.InitEngine: %w", err)
}
// some doctor sub-commands need to use git command
if err := git.InitFull(ctx); err != nil {
return fmt.Errorf("git.InitFull: %w", err)
}
return nil
}
type doctorCheckLogger struct {
colorize bool
}
var _ log.BaseLogger = (*doctorCheckLogger)(nil)
func (d *doctorCheckLogger) Log(skip int, level log.Level, format string, v ...any) {
_, _ = fmt.Fprintf(os.Stdout, format+"\n", v...)
}
func (d *doctorCheckLogger) GetLevel() log.Level {
return log.TRACE
}
type doctorCheckStepLogger struct {
colorize bool
}
var _ log.BaseLogger = (*doctorCheckStepLogger)(nil)
func (d *doctorCheckStepLogger) Log(skip int, level log.Level, format string, v ...any) {
levelChar := fmt.Sprintf("[%s]", strings.ToUpper(level.String()[0:1]))
var levelArg any = levelChar
if d.colorize {
levelArg = log.NewColoredValue(levelChar, level.ColorAttributes()...)
}
args := append([]any{levelArg}, v...)
_, _ = fmt.Fprintf(os.Stdout, " - %s "+format+"\n", args...)
}
func (d *doctorCheckStepLogger) GetLevel() log.Level {
return log.TRACE
}
// Checks is the list of available commands
var Checks []*Check
// RunChecks runs the doctor checks for the provided list
func RunChecks(ctx context.Context, colorize, autofix bool, checks []*Check) error {
// the checks output logs by a special logger, they do not use the default logger
logger := log.BaseLoggerToGeneralLogger(&doctorCheckLogger{colorize: colorize})
loggerStep := log.BaseLoggerToGeneralLogger(&doctorCheckStepLogger{colorize: colorize})
dbIsInit := false
for i, check := range checks {
if !dbIsInit && !check.SkipDatabaseInitialization {
// Only open database after the most basic configuration check
if err := initDBSkipLogger(ctx); err != nil {
logger.Error("Error whilst initializing the database: %v", err)
logger.Error("Check if you are using the right config file. You can use a --config directive to specify one.")
return nil
}
dbIsInit = true
}
logger.Info("\n[%d] %s", i+1, check.Title)
if err := check.Run(ctx, loggerStep, autofix); err != nil {
if check.AbortIfFailed {
logger.Critical("FAIL")
return err
}
logger.Error("ERROR")
} else {
logger.Info("OK")
}
}
logger.Info("\nAll done.")
return nil
}
// Register registers a command with the list
func Register(command *Check) {
Checks = append(Checks, command)
sort.SliceStable(Checks, func(i, j int) bool {
if Checks[i].Priority == Checks[j].Priority {
return Checks[i].Name < Checks[j].Name
}
if Checks[i].Priority == 0 {
return false
}
return Checks[i].Priority < Checks[j].Priority
})
}