feature: add gen-doc command to auto gen dfget cli docs

Signed-off-by: Allen Sun <[email protected]>

cmd/dfget/app/gen_doc.go

@@ -0,0 +1,39 @@
+package app
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/cobra/doc"
+)
+
+// GenDocCommand is used to implement 'gen-doc' command.
+type GenDocCommand struct {
+	cmd *cobra.Command
+}
+
+func init() {
+	genDocCommand := &GenDocCommand{}
+	genDocCommand.cmd = &cobra.Command{
+		Use:           "gen-doc",
+		Short:         "Generate Document for dfget command line tool with MarkDown format",
+		SilenceErrors: true,
+		SilenceUsage:  true,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			return genDocCommand.runGenDoc(args)
+		},
+	}
+	rootCmd.AddCommand(genDocCommand.cmd)
+}
+
+func (g *GenDocCommand) runGenDoc(args []string) error {
+	// FIXME: make document path configurable
+	if _, err := os.Stat("../../docs/cli_reference"); err != nil {
+		if os.IsNotExist(err) {
+			return fmt.Errorf("directory ../../docs/cli_reference does not exist")
+		}
+		return err
+	}
+	return doc.GenMarkdownTree(g.cmd.Parent(), "../../docs/cli_reference")
+}

cmd/dfget/app/root.go

@@ -24,9 +24,10 @@ var (
 )
 
 var rootCmd = &cobra.Command{
-	Use:   "dfget",
-	Short: "The dfget is the client of Dragonfly.",
-	Long:  "The dfget is the client of Dragonfly, a non-interactive P2P downloader.",
+	Use:               "dfget",
+	Short:             "The dfget is the client of Dragonfly.",
+	Long:              "The dfget is the client of Dragonfly, a non-interactive P2P downloader.",
+	DisableAutoGenTag: true, // disable displaying auto generation tag in cli docs
 	Run: func(cmd *cobra.Command, args []string) {
 		initConfig(args)
 		cfg.Ctx.ClientLogger.Infof("cmd params:%q", args)

docs/cli_reference/dfget.md

@@ -1,83 +1,43 @@
----
-title: "dfget"
-weight: 5
----
+## dfget
 
-dfget is the client of Dragonfly. You can use the dfget command in the command line tool.
-<!--more-->
+The dfget is the client of Dragonfly.
 
-## Name
+### Synopsis
 
-dfget - the client of Dragonfly, a non-interactive P2P downloader.
-
-## Synopsis
-
-`dfget -u [URL] [options]...`
-
-## Options
+The dfget is the client of Dragonfly, a non-interactive P2P downloader.
 
 ```
-  -h, --help            show this help message and exit
-  --url URL, -u URL     will download a file from this url
-  --output OUTPUT, -O OUTPUT, -o OUTPUT
-                        output path that not only contains the dir part but
-                        also name part
-  --md5 MD5, -m MD5     expected file md5
-  --callsystem CALLSYSTEM
-                        system name that executes dfget,its format is
-                        company_department_appName
-  --notbs               not back source when p2p fail
-  --locallimit LOCALLIMIT, -s LOCALLIMIT
-                        rate limit about a single download task,its format is
-                        20M/m/K/k
-  --totallimit TOTALLIMIT
-                        rate limit about the whole host,its format is
-                        20M/m/K/k
-  --identifier IDENTIFIER, -i IDENTIFIER
-                        identify download task,it is available merely when md5
-                        param not exist
-  --timeout TIMEOUT, --exceed TIMEOUT, -e TIMEOUT
-                        download timeout(second)
-  --filter FILTER, -f FILTER
-                        filter some query params of url ,e.g. -f 'key&sign'
-                        will filter key and sign query param.in this
-                        way,different urls correspond one same download task
-                        that can use p2p mode
-  --showbar, -b         show progress bar
-  --pattern {p2p,cdn}, -p {p2p,cdn}
-                        download pattern,cdn pattern not support totallimit
-  --version, -v         version
-  --node NODE, -n NODE  specify nodes
-  --console             show log on console
-  --header HEADER       http header, e.g. --header="Accept: *" --header="Host:
-                        abc"
-  --dfdaemon            caller is from df-daemon
+dfget [flags]
 ```
 
-## Files
-
-### /etc/dragonfly.conf
+### Options
 
-This is the default configuration file for dfget, which specifies the address of the supernode.
-
-```ini
-[node]
-address=127.0.0.1,127.0.0.2
+```
+      --callsystem string   system name that executes dfget
+      --console             show log on console, it's conflict with '--showbar'
+      --dfdaemon            caller is from dfdaemon
+  -f, --filter string       filter some query params of url, use char '&' to separate different params
+                            eg: -f 'key&sign' will filter 'key' and 'sign' query param
+                            in this way, different urls correspond one same download task that can use p2p mode
+      --header strings      http header, eg: --header='Accept: *' --header='Host: abc'
+  -h, --help                help for dfget
+  -i, --identifier string   identify download task, it is available merely when md5 param not exist
+  -s, --locallimit string   rate limit about a single download task, its format is 20M/m/K/k
+  -m, --md5 string          expected file md5
+  -n, --node strings        specify supnernodes
+      --notbs               not back source when p2p fail
+  -o, --output string       output path that not only contains the dir part but also name part
+  -p, --pattern string      download pattern, must be 'p2p' or 'cdn' or 'source'
+                            cdn/source pattern not support 'totallimit' flag (default "p2p")
+  -b, --showbar             show progress bar, it's conflict with '--console'
+  -e, --timeout int         download timeout(second)
+      --totallimit string   rate limit about the whole host, its format is 20M/m/K/k
+  -u, --url string          will download a file from this url
+      --verbose             be verbose
 ```
 
-### ${HOME}/.small-dragonfly
+### SEE ALSO
 
-This directory is created by dfget when you start it for the first time.
+* [dfget gen-doc](dfget_gen-doc.md)	 - Generate Document for dfget command line tool with MarkDown format
+* [dfget version](dfget_version.md)	 - Show the current version
 
-```text
-.small-dragonfly/
-├── data/               # stores temporary data downloaded by dfget
-├── dfdaemon/
-│   └── data/           # default, stores temporary data generated by dfdaemon
-├── logs/
-│   ├── dfclient.log    # dfget's log file
-│   ├── dfserver.log    # log file of peer server launched by dfget
-│   └── dfdaemon.log    # dfdaemon's log file
-└── meta/
-    └── host.meta       # stores meta information: peer server port
-```

docs/cli_reference/dfget_gen-doc.md

@@ -0,0 +1,47 @@
+## dfget gen-doc
+
+Generate Document for dfget command line tool with MarkDown format
+
+### Synopsis
+
+Generate Document for dfget command line tool with MarkDown format
+
+```
+dfget gen-doc [flags]
+```
+
+### Options
+
+```
+  -h, --help   help for gen-doc
+```
+
+### Options inherited from parent commands
+
+```
+      --callsystem string   system name that executes dfget
+      --console             show log on console, it's conflict with '--showbar'
+      --dfdaemon            caller is from dfdaemon
+  -f, --filter string       filter some query params of url, use char '&' to separate different params
+                            eg: -f 'key&sign' will filter 'key' and 'sign' query param
+                            in this way, different urls correspond one same download task that can use p2p mode
+      --header strings      http header, eg: --header='Accept: *' --header='Host: abc'
+  -i, --identifier string   identify download task, it is available merely when md5 param not exist
+  -s, --locallimit string   rate limit about a single download task, its format is 20M/m/K/k
+  -m, --md5 string          expected file md5
+  -n, --node strings        specify supnernodes
+      --notbs               not back source when p2p fail
+  -o, --output string       output path that not only contains the dir part but also name part
+  -p, --pattern string      download pattern, must be 'p2p' or 'cdn' or 'source'
+                            cdn/source pattern not support 'totallimit' flag (default "p2p")
+  -b, --showbar             show progress bar, it's conflict with '--console'
+  -e, --timeout int         download timeout(second)
+      --totallimit string   rate limit about the whole host, its format is 20M/m/K/k
+  -u, --url string          will download a file from this url
+      --verbose             be verbose
+```
+
+### SEE ALSO
+
+* [dfget](dfget.md)	 - The dfget is the client of Dragonfly.
+

docs/cli_reference/dfget_version.md

@@ -0,0 +1,47 @@
+## dfget version
+
+Show the current version
+
+### Synopsis
+
+Show the current version
+
+```
+dfget version [flags]
+```
+
+### Options
+
+```
+  -h, --help   help for version
+```
+
+### Options inherited from parent commands
+
+```
+      --callsystem string   system name that executes dfget
+      --console             show log on console, it's conflict with '--showbar'
+      --dfdaemon            caller is from dfdaemon
+  -f, --filter string       filter some query params of url, use char '&' to separate different params
+                            eg: -f 'key&sign' will filter 'key' and 'sign' query param
+                            in this way, different urls correspond one same download task that can use p2p mode
+      --header strings      http header, eg: --header='Accept: *' --header='Host: abc'
+  -i, --identifier string   identify download task, it is available merely when md5 param not exist
+  -s, --locallimit string   rate limit about a single download task, its format is 20M/m/K/k
+  -m, --md5 string          expected file md5
+  -n, --node strings        specify supnernodes
+      --notbs               not back source when p2p fail
+  -o, --output string       output path that not only contains the dir part but also name part
+  -p, --pattern string      download pattern, must be 'p2p' or 'cdn' or 'source'
+                            cdn/source pattern not support 'totallimit' flag (default "p2p")
+  -b, --showbar             show progress bar, it's conflict with '--console'
+  -e, --timeout int         download timeout(second)
+      --totallimit string   rate limit about the whole host, its format is 20M/m/K/k
+  -u, --url string          will download a file from this url
+      --verbose             be verbose
+```
+
+### SEE ALSO
+
+* [dfget](dfget.md)	 - The dfget is the client of Dragonfly.
+