Fix sub-command log level (#25537) (#25553)

Backport #25537

More fix for #24981

* #24981

Close #22361, #25552

* #22361
* #25552

There were many patches for Gitea's sub-commands to satisfy the facts:

* Some sub-commands shouldn't output any log, otherwise the git protocol
would be broken
* Sometimes the users want to see "verbose" or "quiet" outputs

That's a longstanding problem, and very fragile. This PR is only a quick
patch for the problem.

In the future, the sub-command system should be refactored to a clear
solution.

----

Other changes:

* Use `ReplaceAllWriters` to replace
`RemoveAllWriters().AddWriters(writer)`, then it's an atomic operation.
* Remove unnecessary `syncLevelInternal` calls, because
`AddWriters/addWritersInternal` already calls it.

6 files changed, 24 insertions, 7 deletions

diff --git a/cmd/cmd.go b/cmd/cmd.go
index 8076acecaa..4ed636a9b4 100644
--- a/cmd/cmd.go
+++ b/cmd/cmd.go
@@ -106,5 +106,21 @@ func setupConsoleLogger(level log.Level, colorize bool, out io.Writer) {
 		WriterOption: log.WriterConsoleOption{Stderr: out == os.Stderr},
 	}
 	writer := log.NewEventWriterConsole("console-default", writeMode)
-	log.GetManager().GetLogger(log.DEFAULT).RemoveAllWriters().AddWriters(writer)
+	log.GetManager().GetLogger(log.DEFAULT).ReplaceAllWriters(writer)
+}
+
+// PrepareConsoleLoggerLevel by default, use INFO level for console logger, but some sub-commands (for git/ssh protocol) shouldn't output any log to stdout.
+// Any log appears in git stdout pipe will break the git protocol, eg: client can't push and hangs forever.
+func PrepareConsoleLoggerLevel(defaultLevel log.Level) func(*cli.Context) error {
+	return func(c *cli.Context) error {
+		level := defaultLevel
+		if c.Bool("quiet") || c.GlobalBoolT("quiet") {
+			level = log.FATAL
+		}
+		if c.Bool("debug") || c.GlobalBool("debug") || c.Bool("verbose") || c.GlobalBool("verbose") {
+			level = log.TRACE
+		}
+		log.SetConsoleLogger(log.DEFAULT, "console-default", level)
+		return nil
+	}
 }
diff --git a/cmd/doctor.go b/cmd/doctor.go
index b79436fc0a..cd5f125e20 100644
--- a/cmd/doctor.go
+++ b/cmd/doctor.go
@@ -151,7 +151,7 @@ func setupDoctorDefaultLogger(ctx *cli.Context, colorize bool) {
 			log.FallbackErrorf("unable to create file log writer: %v", err)
 			return
 		}
-		log.GetManager().GetLogger(log.DEFAULT).RemoveAllWriters().AddWriters(writer)
+		log.GetManager().GetLogger(log.DEFAULT).ReplaceAllWriters(writer)
 	}
 }
 
diff --git a/cmd/hook.go b/cmd/hook.go
index 6453267832..ed6efc19ea 100644
--- a/cmd/hook.go
+++ b/cmd/hook.go
@@ -15,6 +15,7 @@ import (
 	"time"
 
 	"code.gitea.io/gitea/modules/git"
+	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/private"
 	repo_module "code.gitea.io/gitea/modules/repository"
 	"code.gitea.io/gitea/modules/setting"
@@ -32,6 +33,7 @@ var (
 		Name:        "hook",
 		Usage:       "Delegate commands to corresponding Git hooks",
 		Description: "This should only be called by Git",
+		Before:      PrepareConsoleLoggerLevel(log.FATAL),
 		Subcommands: []cli.Command{
 			subcmdHookPreReceive,
 			subcmdHookUpdate,
diff --git a/cmd/keys.go b/cmd/keys.go
index deb94fca5d..8aeee37527 100644
--- a/cmd/keys.go
+++ b/cmd/keys.go
@@ -8,6 +8,7 @@ import (
 	"fmt"
 	"strings"
 
+	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/private"
 
 	"github.com/urfave/cli"
@@ -17,6 +18,7 @@ import (
 var CmdKeys = cli.Command{
 	Name:   "keys",
 	Usage:  "This command queries the Gitea database to get the authorized command for a given ssh key fingerprint",
+	Before: PrepareConsoleLoggerLevel(log.FATAL),
 	Action: runKeys,
 	Flags: []cli.Flag{
 		cli.StringFlag{
diff --git a/cmd/serv.go b/cmd/serv.go
index 01102d3800..79052e58a8 100644
--- a/cmd/serv.go
+++ b/cmd/serv.go
@@ -44,6 +44,7 @@ var CmdServ = cli.Command{
 	Name:        "serv",
 	Usage:       "This command should only be called by SSH shell",
 	Description: "Serv provides access auth for repositories",
+	Before:      PrepareConsoleLoggerLevel(log.FATAL),
 	Action:      runServ,
 	Flags: []cli.Flag{
 		cli.BoolFlag{
diff --git a/cmd/web.go b/cmd/web.go
index 8eb08120c7..53219c3dec 100644
--- a/cmd/web.go
+++ b/cmd/web.go
@@ -35,6 +35,7 @@ var CmdWeb = cli.Command{
 	Usage: "Start Gitea web server",
 	Description: `Gitea web server is the only thing you need to run,
 and it takes care of all the other things for you`,
+	Before: PrepareConsoleLoggerLevel(log.INFO),
 	Action: runWeb,
 	Flags: []cli.Flag{
 		cli.StringFlag{
@@ -206,11 +207,6 @@ func servePprof() {
 }
 
 func runWeb(ctx *cli.Context) error {
-	if ctx.Bool("verbose") {
-		setupConsoleLogger(log.TRACE, log.CanColorStdout, os.Stdout)
-	} else if ctx.Bool("quiet") {
-		setupConsoleLogger(log.FATAL, log.CanColorStdout, os.Stdout)
-	}
 	defer func() {
 		if panicked := recover(); panicked != nil {
 			log.Fatal("PANIC: %v\n%s", panicked, log.Stack(2))