Improve CLI code and descriptions (#28482)

* Close #28444 
* Actually, it doesn't need to use that trick because it looks like it
is not necessary, no user really needs it
* Remove the hidden (legacy) "doctor" subcommand and update documents
* Fix "actions" usage


![image](https://github.com/go-gitea/gitea/assets/2114189/3c2b34a7-4f92-4a6c-96fd-9505e413d4ec)

cmd/actions.go

@@ -16,8 +16,7 @@ var (
 	// CmdActions represents the available actions sub-commands.
 	CmdActions = &cli.Command{
 		Name:  "actions",
-		Usage:       "",
+		Usage: "Manage Gitea Actions",
-		Description: "Commands for managing Gitea Actions",
 		Subcommands: []*cli.Command{
 			subcmdActionsGenRunnerToken,
 		},

cmd/admin.go

@@ -21,7 +21,7 @@ var (
 	// CmdAdmin represents the available admin sub-command.
 	CmdAdmin = &cli.Command{
 		Name:  "admin",
-		Usage: "Command line interface to perform common administrative operations",
+		Usage: "Perform common administrative operations",
 		Subcommands: []*cli.Command{
 			subcmdUser,
 			subcmdRepoSyncReleases,

cmd/doctor.go

@@ -26,7 +26,7 @@ import (
 // CmdDoctor represents the available doctor sub-command.
 var CmdDoctor = &cli.Command{
 	Name:        "doctor",
-	Usage:       "Diagnose and optionally fix problems",
+	Usage:       "Diagnose and optionally fix problems, convert or re-create database tables",
 	Description: "A command to diagnose problems with the current Gitea instance according to the given configuration. Some problems can optionally be fixed by modifying the database or data storage.",
 
 	Subcommands: []*cli.Command{

cmd/generate.go

@@ -18,7 +18,7 @@ var (
 	// CmdGenerate represents the available generate sub-command.
 	CmdGenerate = &cli.Command{
 		Name:  "generate",
-		Usage: "Command line interface for running generators",
+		Usage: "Generate Gitea's secrets/keys/tokens",
 		Subcommands: []*cli.Command{
 			subcmdSecret,
 		},

cmd/hook.go

@@ -31,8 +31,8 @@ var (
 	// CmdHook represents the available hooks sub-command.
 	CmdHook = &cli.Command{
 		Name:        "hook",
-		Usage:       "Delegate commands to corresponding Git hooks",
+		Usage:       "(internal) Should only be called by Git",
-		Description: "This should only be called by Git",
+		Description: "Delegate commands to corresponding Git hooks",
 		Before:      PrepareConsoleLoggerLevel(log.FATAL),
 		Subcommands: []*cli.Command{
 			subcmdHookPreReceive,

cmd/keys.go

@@ -17,7 +17,8 @@ import (
 // CmdKeys represents the available keys sub-command
 var CmdKeys = &cli.Command{
 	Name:        "keys",
-	Usage:  "This command queries the Gitea database to get the authorized command for a given ssh key fingerprint",
+	Usage:       "(internal) Should only be called by SSH server",
+	Description: "Queries the Gitea database to get the authorized command for a given ssh key fingerprint",
 	Before:      PrepareConsoleLoggerLevel(log.FATAL),
 	Action:      runKeys,
 	Flags: []cli.Flag{

cmd/main.go

@@ -10,12 +10,12 @@ import (
 
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/setting"
-	"code.gitea.io/gitea/modules/util"
 
 	"github.com/urfave/cli/v2"
 )
 
 // cmdHelp is our own help subcommand with more information
+// Keep in mind that the "./gitea help"(subcommand) is different from "./gitea --help"(flag), the flag doesn't parse the config or output "DEFAULT CONFIGURATION:" information
 func cmdHelp() *cli.Command {
 	c := &cli.Command{
 		Name:      "help",
@@ -47,16 +47,10 @@ DEFAULT CONFIGURATION:
 	return c
 }
 
-var helpFlag = cli.HelpFlag
-
-func init() {
-	// cli.HelpFlag = nil TODO: after https://github.com/urfave/cli/issues/1794 we can use this
-}
-
 func appGlobalFlags() []cli.Flag {
 	return []cli.Flag{
 		// make the builtin flags at the top
-		helpFlag,
+		cli.HelpFlag,
 
 		// shared configuration flags, they are for global and for each sub-command at the same time
 		// eg: such command is valid: "./gitea --config /tmp/app.ini web --config /tmp/app.ini", while it's discouraged indeed
@@ -121,20 +115,22 @@ func prepareWorkPathAndCustomConf(action cli.ActionFunc) func(ctx *cli.Context)
 func NewMainApp(version, versionExtra string) *cli.App {
 	app := cli.NewApp()
 	app.Name = "Gitea"
+	app.HelpName = "gitea"
 	app.Usage = "A painless self-hosted Git service"
-	app.Description = `By default, Gitea will start serving using the web-server with no argument, which can alternatively be run by running the subcommand "web".`
+	app.Description = `Gitea program contains "web" and other subcommands. If no subcommand is given, it starts the web server by default. Use "web" subcommand for more web server arguments, use other subcommands for other purposes.`
 	app.Version = version + versionExtra
 	app.EnableBashCompletion = true
 
 	// these sub-commands need to use config file
 	subCmdWithConfig := []*cli.Command{
+		cmdHelp(), // the "help" sub-command was used to show the more information for "work path" and "custom config"
 		CmdWeb,
 		CmdServ,
 		CmdHook,
+		CmdKeys,
 		CmdDump,
 		CmdAdmin,
 		CmdMigrate,
-		CmdKeys,
 		CmdDoctor,
 		CmdManager,
 		CmdEmbedded,
@@ -142,13 +138,8 @@ func NewMainApp(version, versionExtra string) *cli.App {
 		CmdDumpRepository,
 		CmdRestoreRepository,
 		CmdActions,
-		cmdHelp(), // the "help" sub-command was used to show the more information for "work path" and "custom config"
 	}
 
-	cmdConvert := util.ToPointer(*cmdDoctorConvert)
-	cmdConvert.Hidden = true // still support the legacy "./gitea doctor" by the hidden sub-command, remove it in next release
-	subCmdWithConfig = append(subCmdWithConfig, cmdConvert)
-
 	// these sub-commands do not need the config file, and they do not depend on any path or environment variable.
 	subCmdStandalone := []*cli.Command{
 		CmdCert,

cmd/serv.go

@@ -42,7 +42,7 @@ const (
 // CmdServ represents the available serv sub-command.
 var CmdServ = &cli.Command{
 	Name:        "serv",
-	Usage:       "This command should only be called by SSH shell",
+	Usage:       "(internal) Should only be called by SSH shell",
 	Description: "Serv provides access auth for repositories",
 	Before:      PrepareConsoleLoggerLevel(log.FATAL),
 	Action:      runServ,

docs/content/help/faq.en-us.md

@@ -362,7 +362,7 @@ If you are receiving errors on upgrade of Gitea using MySQL that read:
 
 > `ORM engine initialization failed: migrate: do migrate: Error: 1118: Row size too large...`
 
-Please run `gitea convert` or run `ALTER TABLE table_name ROW_FORMAT=dynamic;` for each table in the database.
+Please run `gitea doctor convert` or run `ALTER TABLE table_name ROW_FORMAT=dynamic;` for each table in the database.
 
 The underlying problem is that the space allocated for indices by the default row format
 is too small. Gitea requires that the `ROWFORMAT` for its tables is `DYNAMIC`.
@@ -385,7 +385,7 @@ Unfortunately MySQL's `utf8` charset does not completely allow all possible UTF-
 They created a new charset and collation called `utf8mb4` that allows for emoji to be stored but tables which use
 the `utf8` charset, and connections which use the `utf8` charset will not use this.
 
-Please run `gitea convert`, or run `ALTER DATABASE database_name CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;`
+Please run `gitea doctor convert`, or run `ALTER DATABASE database_name CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;`
 for the database_name and run `ALTER TABLE table_name CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;`
 for each table in the database.
 

docs/content/help/faq.zh-cn.md

@@ -366,7 +366,7 @@ Gitea 提供了一个子命令`gitea migrate`来初始化数据库，然后您
 
 > `ORM engine initialization failed: migrate: do migrate: Error: 1118: Row size too large...`
 
-请运行`gitea convert`或对数据库中的每个表运行`ALTER TABLE table_name ROW_FORMAT=dynamic;`。
+请运行 `gitea doctor convert` 或对数据库中的每个表运行 `ALTER TABLE table_name ROW_FORMAT=dynamic;`。
 
 潜在问题是默认行格式分配给每个表的索引空间
 太小。Gitea 要求其表的`ROWFORMAT`为`DYNAMIC`。
@@ -389,9 +389,8 @@ SET GLOBAL innodb_large_prefix=1;
 他们创建了一个名为 `utf8mb4`的字符集和校对规则，允许存储 Emoji，但使用
 utf8 字符集的表和连接将不会使用它。
 
-请运行 `gitea convert` 或对数据库运行`ALTER DATABASE database_name CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;`
+请运行 `gitea doctor convert` 或对数据库运行 `ALTER DATABASE database_name CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;`
-并对每个表运行
+并对每个表运行 `ALTER TABLE table_name CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;`。
-`ALTER TABLE table_name CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;`。
 
 您还需要将`app.ini`文件中的数据库字符集设置为`CHARSET=utf8mb4`。
 

go.mod

@@ -99,7 +99,7 @@ require (
 	github.com/syndtr/goleveldb v1.0.0
 	github.com/tstranex/u2f v1.0.0
 	github.com/ulikunitz/xz v0.5.11
-	github.com/urfave/cli/v2 v2.25.7
+	github.com/urfave/cli/v2 v2.26.0
 	github.com/xanzy/go-gitlab v0.93.1
 	github.com/xeipuuv/gojsonschema v1.2.0
 	github.com/yohcop/openid-go v1.0.1

go.sum

@@ -1023,8 +1023,8 @@ github.com/ulikunitz/xz v0.5.11/go.mod h1:nbz6k7qbPmH4IRqmfOplQw/tblSgqTqBwxkY0o
 github.com/unknwon/com v0.0.0-20190804042917-757f69c95f3e/go.mod h1:tOOxU81rwgoCLoOVVPHb6T/wt8HZygqH5id+GNnlCXM=
 github.com/unknwon/com v1.0.1 h1:3d1LTxD+Lnf3soQiD4Cp/0BRB+Rsa/+RTvz8GMMzIXs=
 github.com/unknwon/com v1.0.1/go.mod h1:tOOxU81rwgoCLoOVVPHb6T/wt8HZygqH5id+GNnlCXM=
-github.com/urfave/cli/v2 v2.25.7 h1:VAzn5oq403l5pHjc4OhD54+XGO9cdKVL/7lDjF+iKUs=
+github.com/urfave/cli/v2 v2.26.0 h1:3f3AMg3HpThFNT4I++TKOejZO8yU55t3JnnSr4S4QEI=
-github.com/urfave/cli/v2 v2.25.7/go.mod h1:8qnjx1vcq5s2/wpsqoZFndg2CE5tNFyrTvS6SinrnYQ=
+github.com/urfave/cli/v2 v2.26.0/go.mod h1:8qnjx1vcq5s2/wpsqoZFndg2CE5tNFyrTvS6SinrnYQ=
 github.com/valyala/bytebufferpool v1.0.0 h1:GqA5TC/0021Y/b9FG4Oi9Mr3q7XYx6KllzawFIhcdPw=
 github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
 github.com/valyala/fasthttp v1.37.1-0.20220607072126-8a320890c08d/go.mod h1:t/G+3rLek+CyY9bnIE+YlMRddxVAAGjhxndDB4i4C0I=