Allow any variant of the help option to trigger the help

CHANGELOG.md

@@ -32,6 +32,7 @@ With this release the systemd configuration files for InfluxDB will use the syst
 - [#6900](https://github.com/influxdata/influxdb/pull/6900): Trim BOM from Windows Notepad-saved config files.
 - [#6938](https://github.com/influxdata/influxdb/issues/6938): Added favicon
 - [#6507](https://github.com/influxdata/influxdb/issues/6507): Refactor monitor service to avoid expvar and write monitor statistics on a truncated time interval.
+- [#6805](https://github.com/influxdata/influxdb/issues/6805): Allow any variant of the help option to trigger the help.
 
 ### Bugfixes
 

cmd/influxd/help/help.go

@@ -34,6 +34,7 @@ The commands are:
 
     backup               downloads a snapshot of a data node and saves it to disk
     config               display the default configuration
+    help                 display this help message
     restore              uses a snapshot of a data node to rebuild a cluster
     run                  run node with existing configuration
     version              displays the InfluxDB version

cmd/influxd/main.go

@@ -145,19 +145,18 @@ func (m *Main) Run(args ...string) error {
 func ParseCommandName(args []string) (string, []string) {
 	// Retrieve command name as first argument.
 	var name string
-	if len(args) > 0 && !strings.HasPrefix(args[0], "-") {
-		name = args[0]
-	}
-
-	// Special case -h immediately following binary name
-	if len(args) > 0 && args[0] == "-h" {
-		name = "help"
+	if len(args) > 0 {
+		if !strings.HasPrefix(args[0], "-") {
+			name = args[0]
+		} else if args[0] == "-h" || args[0] == "-help" || args[0] == "--help" {
+			// Special case -h immediately following binary name
+			name = "help"
+		}
 	}
 
 	// If command is "help" and has an argument then rewrite args to use "-h".
-	if name == "help" && len(args) > 1 {
-		args[0], args[1] = args[1], "-h"
-		name = args[0]
+	if name == "help" && len(args) > 2 && !strings.HasPrefix(args[1], "-") {
+		return args[1], []string{"-h"}
 	}
 
 	// If a named command is specified then return it with its arguments.