Refactor to use urfave/cli/v2 (#25959)

Replace #10912

And there are many new tests to cover the CLI behavior

There were some concerns about the "option order in hook scripts"
(https://github.com/go-gitea/gitea/pull/10912#issuecomment-1137543314),
it's not a problem now. Because the hook script uses `/gitea hook
--config=/app.ini pre-receive` format. The "config" is a global option,
it can appear anywhere.

----

## ⚠️ BREAKING ⚠️

This PR does it best to avoid breaking anything. The major changes are:

* `gitea` itself won't accept web's options: `--install-port` / `--pid`
/ `--port` / `--quiet` / `--verbose` .... They are `web` sub-command's
options.
    * Use `./gitea web --pid ....` instead
* `./gitea` can still run the `web` sub-command as shorthand, with
default options
* The sub-command's options must follow the sub-command
* Before: `./gitea --sub-opt subcmd` might equal to `./gitea subcmd
--sub-opt` (well, might not ...)
    * After: only `./gitea subcmd --sub-opt` could be used
    * The global options like `--config` are not affected

cmd/dump.go

@@ -22,7 +22,7 @@ import (
 
 	"gitea.com/go-chi/session"
 	"github.com/mholt/archiver/v3"
-	"github.com/urfave/cli"
+	"github.com/urfave/cli/v2"
 )
 
 func addReader(w archiver.Writer, r io.ReadCloser, info os.FileInfo, customName string, verbose bool) error {
@@ -96,64 +96,71 @@ var outputTypeEnum = &outputType{
 }
 
 // CmdDump represents the available dump sub-command.
-var CmdDump = cli.Command{
+var CmdDump = &cli.Command{
 	Name:  "dump",
 	Usage: "Dump Gitea files and database",
 	Description: `Dump compresses all related files and database into zip file.
 It can be used for backup and capture Gitea server image to send to maintainer`,
 	Action: runDump,
 	Flags: []cli.Flag{
-		cli.StringFlag{
-			Name:  "file, f",
-			Value: fmt.Sprintf("gitea-dump-%d.zip", time.Now().Unix()),
-			Usage: "Name of the dump file which will be created. Supply '-' for stdout. See type for available types.",
+		&cli.StringFlag{
+			Name:    "file",
+			Aliases: []string{"f"},
+			Value:   fmt.Sprintf("gitea-dump-%d.zip", time.Now().Unix()),
+			Usage:   "Name of the dump file which will be created. Supply '-' for stdout. See type for available types.",
 		},
-		cli.BoolFlag{
-			Name:  "verbose, V",
-			Usage: "Show process details",
+		&cli.BoolFlag{
+			Name:    "verbose",
+			Aliases: []string{"V"},
+			Usage:   "Show process details",
 		},
-		cli.BoolFlag{
-			Name:  "quiet, q",
-			Usage: "Only display warnings and errors",
+		&cli.BoolFlag{
+			Name:    "quiet",
+			Aliases: []string{"q"},
+			Usage:   "Only display warnings and errors",
 		},
-		cli.StringFlag{
-			Name:  "tempdir, t",
-			Value: os.TempDir(),
-			Usage: "Temporary dir path",
+		&cli.StringFlag{
+			Name:    "tempdir",
+			Aliases: []string{"t"},
+			Value:   os.TempDir(),
+			Usage:   "Temporary dir path",
 		},
-		cli.StringFlag{
-			Name:  "database, d",
-			Usage: "Specify the database SQL syntax",
+		&cli.StringFlag{
+			Name:    "database",
+			Aliases: []string{"d"},
+			Usage:   "Specify the database SQL syntax",
 		},
-		cli.BoolFlag{
-			Name:  "skip-repository, R",
-			Usage: "Skip the repository dumping",
+		&cli.BoolFlag{
+			Name:    "skip-repository",
+			Aliases: []string{"R"},
+			Usage:   "Skip the repository dumping",
 		},
-		cli.BoolFlag{
-			Name:  "skip-log, L",
-			Usage: "Skip the log dumping",
+		&cli.BoolFlag{
+			Name:    "skip-log",
+			Aliases: []string{"L"},
+			Usage:   "Skip the log dumping",
 		},
-		cli.BoolFlag{
+		&cli.BoolFlag{
 			Name:  "skip-custom-dir",
 			Usage: "Skip custom directory",
 		},
-		cli.BoolFlag{
+		&cli.BoolFlag{
 			Name:  "skip-lfs-data",
 			Usage: "Skip LFS data",
 		},
-		cli.BoolFlag{
+		&cli.BoolFlag{
 			Name:  "skip-attachment-data",
 			Usage: "Skip attachment data",
 		},
-		cli.BoolFlag{
+		&cli.BoolFlag{
 			Name:  "skip-package-data",
 			Usage: "Skip package data",
 		},
-		cli.BoolFlag{
+		&cli.BoolFlag{
 			Name:  "skip-index",
 			Usage: "Skip bleve index data",
 		},
-		cli.GenericFlag{
+		&cli.GenericFlag{
 			Name:  "type",
 			Value: outputTypeEnum,
 			Usage: fmt.Sprintf("Dump output format: %s", outputTypeEnum.Join()),