Allow manager logging to set SQL (#20064)

This PR adds a new manager command to switch on SQL logging and to turn it off.

```
gitea manager logging log-sql
gitea manager logging log-sql --off
```

Signed-off-by: Andrew Thornton <art27@cantab.net>

6 files changed, 79 insertions, 9 deletions

diff --git a/cmd/manager_logging.go b/cmd/manager_logging.go
index 0043ea1e52..761edf654c 100644
--- a/cmd/manager_logging.go
+++ b/cmd/manager_logging.go
@@ -174,6 +174,18 @@ var (
 						Action: runAddSMTPLogger,
 					},
 				},
+			}, {
+				Name:  "log-sql",
+				Usage: "Set LogSQL",
+				Flags: []cli.Flag{
+					cli.BoolFlag{
+						Name: "debug",
+					}, cli.BoolFlag{
+						Name:  "off",
+						Usage: "Switch off SQL logging",
+					},
+				},
+				Action: runSetLogSQL,
 			},
 		},
 	}
@@ -381,3 +393,18 @@ func runReleaseReopenLogging(c *cli.Context) error {
 	fmt.Fprintln(os.Stdout, msg)
 	return nil
 }
+
+func runSetLogSQL(c *cli.Context) error {
+	ctx, cancel := installSignals()
+	defer cancel()
+	setup("manager", c.Bool("debug"))
+
+	statusCode, msg := private.SetLogSQL(ctx, !c.Bool("off"))
+	switch statusCode {
+	case http.StatusInternalServerError:
+		return fail("InternalServerError", msg)
+	}
+
+	fmt.Fprintln(os.Stdout, msg)
+	return nil
+}
diff --git a/models/db/engine.go b/models/db/engine.go
index 93cf5ad8bc..2c329300e3 100755
--- a/models/db/engine.go
+++ b/models/db/engine.go
@@ -287,3 +287,12 @@ func GetMaxID(beanOrTableName interface{}) (maxID int64, err error) {
 	_, err = x.Select("MAX(id)").Table(beanOrTableName).Get(&maxID)
 	return maxID, err
 }
+
+func SetLogSQL(ctx context.Context, on bool) {
+	e := GetEngine(ctx)
+	if x, ok := e.(*xorm.Engine); ok {
+		x.ShowSQL(on)
+	} else if sess, ok := e.(*xorm.Session); ok {
+		sess.Engine().ShowSQL(on)
+	}
+}
diff --git a/models/db/log.go b/models/db/log.go
index f9febf440e..4c497fdfd7 100644
--- a/models/db/log.go
+++ b/models/db/log.go
@@ -6,6 +6,7 @@ package db
 
 import (
 	"fmt"
+	"sync/atomic"
 
 	"code.gitea.io/gitea/modules/log"
 
@@ -14,15 +15,19 @@ import (
 
 // XORMLogBridge a logger bridge from Logger to xorm
 type XORMLogBridge struct {
-	showSQL bool
-	logger  log.Logger
+	showSQLint *int32
+	logger     log.Logger
 }
 
 // NewXORMLogger inits a log bridge for xorm
 func NewXORMLogger(showSQL bool) xormlog.Logger {
+	showSQLint := int32(0)
+	if showSQL {
+		showSQLint = 1
+	}
 	return &XORMLogBridge{
-		showSQL: showSQL,
-		logger:  log.GetLogger("xorm"),
+		showSQLint: &showSQLint,
+		logger:     log.GetLogger("xorm"),
 	}
 }
 
@@ -94,14 +99,16 @@ func (l *XORMLogBridge) SetLevel(lvl xormlog.LogLevel) {
 
 // ShowSQL set if record SQL
 func (l *XORMLogBridge) ShowSQL(show ...bool) {
-	if len(show) > 0 {
-		l.showSQL = show[0]
-	} else {
-		l.showSQL = true
+	showSQL := int32(1)
+	if len(show) > 0 && !show[0] {
+		showSQL = 0
 	}
+	atomic.StoreInt32(l.showSQLint, showSQL)
 }
 
 // IsShowSQL if record SQL
 func (l *XORMLogBridge) IsShowSQL() bool {
-	return l.showSQL
+	showSQL := atomic.LoadInt32(l.showSQLint)
+
+	return showSQL == 1
 }
diff --git a/modules/private/manager.go b/modules/private/manager.go
index 8405bf2c83..ba51260ebb 100644
--- a/modules/private/manager.go
+++ b/modules/private/manager.go
@@ -10,6 +10,7 @@ import (
 	"io"
 	"net/http"
 	"net/url"
+	"strconv"
 	"time"
 
 	"code.gitea.io/gitea/modules/json"
@@ -139,6 +140,24 @@ func ReleaseReopenLogging(ctx context.Context) (int, string) {
 	return http.StatusOK, "Logging Restarted"
 }
 
+// SetLogSQL sets database logging
+func SetLogSQL(ctx context.Context, on bool) (int, string) {
+	reqURL := setting.LocalURL + "api/internal/manager/set-log-sql?on=" + strconv.FormatBool(on)
+
+	req := newInternalRequest(ctx, reqURL, "POST")
+	resp, err := req.Response()
+	if err != nil {
+		return http.StatusInternalServerError, fmt.Sprintf("Unable to contact gitea: %v", err.Error())
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return resp.StatusCode, decodeJSONError(resp).Err
+	}
+
+	return http.StatusOK, "Log SQL setting set"
+}
+
 // LoggerOptions represents the options for the add logger call
 type LoggerOptions struct {
 	Group  string
diff --git a/routers/private/internal.go b/routers/private/internal.go
index 6ba87d67bf..061c7f3c82 100644
--- a/routers/private/internal.go
+++ b/routers/private/internal.go
@@ -68,6 +68,7 @@ func Routes() *web.Route {
 	r.Post("/manager/pause-logging", PauseLogging)
 	r.Post("/manager/resume-logging", ResumeLogging)
 	r.Post("/manager/release-and-reopen-logging", ReleaseReopenLogging)
+	r.Post("/manager/set-log-sql", SetLogSQL)
 	r.Post("/manager/add-logger", bind(private.LoggerOptions{}), AddLogger)
 	r.Post("/manager/remove-logger/{group}/{name}", RemoveLogger)
 	r.Get("/manager/processes", Processes)
diff --git a/routers/private/manager.go b/routers/private/manager.go
index a3b9a16f79..e7f08ac455 100644
--- a/routers/private/manager.go
+++ b/routers/private/manager.go
@@ -8,6 +8,7 @@ import (
 	"fmt"
 	"net/http"
 
+	"code.gitea.io/gitea/models/db"
 	"code.gitea.io/gitea/modules/context"
 	"code.gitea.io/gitea/modules/graceful"
 	"code.gitea.io/gitea/modules/json"
@@ -67,6 +68,12 @@ func ReleaseReopenLogging(ctx *context.PrivateContext) {
 	ctx.PlainText(http.StatusOK, "success")
 }
 
+// SetLogSQL re-sets database SQL logging
+func SetLogSQL(ctx *context.PrivateContext) {
+	db.SetLogSQL(ctx, ctx.FormBool("on"))
+	ctx.PlainText(http.StatusOK, "success")
+}
+
 // RemoveLogger removes a logger
 func RemoveLogger(ctx *context.PrivateContext) {
 	group := ctx.Params("group")