cmd: migrate to urfave/cli/v2 (#24751)

This change updates our urfave/cli dependency to the v2 branch of the library.
There are some Go API changes in cli v2:

- Flag values can now be accessed using the methods ctx.Bool,
  ctx.Int, ctx.String, ... regardless of whether the flag is 'local' or
  'global'.

- v2 has built-in support for flag categories. Our home-grown category
  system is removed and the categories of flags are assigned as part of
  the flag definition.

For users, there is only one observable difference with cli v2: flags must now
strictly appear before regular arguments. For example, the following command is
now invalid:

   geth account import mykey.json --password file.txt

Instead, the command must be invoked as follows:

   geth account import --password file.txt mykey.json

build/ci.go

@@ -132,12 +132,12 @@ var (
 	// Note: the following Ubuntu releases have been officially deprecated on Launchpad:
 	//   wily, yakkety, zesty, artful, cosmic, disco, eoan, groovy, hirsuite
 	debDistroGoBoots = map[string]string{
-		"trusty":  "golang-1.11", // EOL: 04/2024
-		"xenial":  "golang-go",   // EOL: 04/2026
-		"bionic":  "golang-go",   // EOL: 04/2028
-		"focal":   "golang-go",   // EOL: 04/2030
-		"impish":  "golang-go",   // EOL: 07/2022
-		"jammy":   "golang-go",   // EOL: 04/2032
+		"trusty": "golang-1.11", // EOL: 04/2024
+		"xenial": "golang-go",   // EOL: 04/2026
+		"bionic": "golang-go",   // EOL: 04/2028
+		"focal":  "golang-go",   // EOL: 04/2030
+		"impish": "golang-go",   // EOL: 07/2022
+		"jammy":  "golang-go",   // EOL: 04/2032
 		//"kinetic": "golang-go",   //  EOL: 07/2023
 	}
 
@@ -224,6 +224,9 @@ func doInstall(cmdline []string) {
 		gobuild.Args = append(gobuild.Args, "-p", "1")
 	}
 
+	// Disable CLI markdown doc generation in release builds.
+	gobuild.Args = append(gobuild.Args, "-tags", "urfave_cli_no_docs")
+
 	// We use -trimpath to avoid leaking local paths into the built executables.
 	gobuild.Args = append(gobuild.Args, "-trimpath")
 

build/deb/ethereum/completions/bash_autocomplete

@@ -0,0 +1,21 @@
+#! /bin/bash
+
+: ${PROG:=$(basename ${BASH_SOURCE})}
+
+_cli_bash_autocomplete() {
+  if [[ "${COMP_WORDS[0]}" != "source" ]]; then
+    local cur opts base
+    COMPREPLY=()
+    cur="${COMP_WORDS[COMP_CWORD]}"
+    if [[ "$cur" == "-"* ]]; then
+      opts=$( ${COMP_WORDS[@]:0:$COMP_CWORD} ${cur} --generate-bash-completion )
+    else
+      opts=$( ${COMP_WORDS[@]:0:$COMP_CWORD} --generate-bash-completion )
+    fi
+    COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+    return 0
+  fi
+}
+
+complete -o bashdefault -o default -o nospace -F _cli_bash_autocomplete $PROG
+unset PROG

build/deb/ethereum/completions/zsh_autocomplete

@@ -0,0 +1,20 @@
+#compdef $PROG
+
+_cli_zsh_autocomplete() {
+  local -a opts
+  local cur
+  cur=${words[-1]}
+  if [[ "$cur" == "-"* ]]; then
+    opts=("${(@f)$(${words[@]:0:#words[@]-1} ${cur} --generate-bash-completion)}")
+  else
+    opts=("${(@f)$(${words[@]:0:#words[@]-1} --generate-bash-completion)}")
+  fi
+
+  if [[ "${opts[1]}" != "" ]]; then
+    _describe 'values' opts
+  else
+    _files
+  fi
+}
+
+compdef _cli_zsh_autocomplete $PROG