Add a new command doctor to check if some wrong configurations on git…

…ea instance

cmd/doctor.go

@@ -5,9 +5,15 @@
 package cmd
 
 import (
-	"github.com/urfave/cli"
+	"bufio"
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
 
 	"code.gitea.io/gitea/modules/setting"
+	"github.com/urfave/cli"
 )
 
 // CmdDoctor represents the available doctor sub-command.
@@ -18,14 +24,95 @@ var CmdDoctor = cli.Command{
 	Action:      runDoctor,
 }
 
+type check struct {
+	title string
+	f     func(ctx *cli.Context) ([]string, error)
+}
+
+var checklist = []check{
+	{
+		title: "Check if openssh authorized_keys file correct",
+		f:     runDoctorLocationMoved,
+	},
+}
+
 func runDoctor(ctx *cli.Context) error {
 	if err := initDB(); err != nil {
 		return err
 	}
 
-	runDoctorLocationMoved(ctx)
+	for i, check := range checklist {
+		fmt.Println("[", i+1, "]", check.title)
+		fmt.Println()
+		if messages, err := check.f(ctx); err != nil {
+			fmt.Println("Error:", err)
+		} else if len(messages) > 0 {
+			for _, message := range messages {
+				fmt.Println("-", message)
+			}
+		} else {
+			fmt.Println("OK.")
+		}
+		fmt.Println()
+	}
+	return nil
+}
+
+func exePath() (string, error) {
+	file, err := exec.LookPath(os.Args[0])
+	if err != nil {
+		return "", err
+	}
+	return filepath.Abs(file)
 }
 
-func runDoctorLocationMoved(ctx *cliContext) {
-	setting.RepoRootPath
+func runDoctorLocationMoved(ctx *cli.Context) ([]string, error) {
+	if setting.SSH.StartBuiltinServer {
+		return nil, nil
+	}
+
+	fPath := filepath.Join(setting.SSH.RootPath, "authorized_keys")
+	f, err := os.Open(fPath)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	var firstline string
+	scanner := bufio.NewScanner(f)
+	for scanner.Scan() {
+		firstline = scanner.Text()
+		if !strings.HasPrefix(firstline, "#") {
+			break
+		}
+	}
+
+	// command="/Volumes/data/Projects/gitea/gitea/gitea --config
+	if len(firstline) > 0 {
+		var start, end int
+		for i, c := range firstline {
+			if c == ' ' {
+				end = i
+				break
+			} else if c == '"' {
+				start = i + 1
+			}
+		}
+		if start > 0 && end > 0 {
+			p, err := exePath()
+			if err != nil {
+				return nil, err
+			}
+			p, err = filepath.Abs(p)
+			if err != nil {
+				return nil, err
+			}
+
+			if firstline[start:end] != p {
+				return []string{fmt.Sprintf("Wants %s but %s on %s", p, firstline[start:end], fPath)}, nil
+			}
+		}
+	}
+
+	return nil, nil
 }

main.go

@@ -68,6 +68,7 @@ arguments - which can alternatively be run by running the subcommand web.`
 		cmd.CmdMigrate,
 		cmd.CmdKeys,
 		cmd.CmdConvert,
+		cmd.CmdDoctor,
 	}
 	// Now adjust these commands to add our global configuration options