Shell completion is suggesting aliases

[bartekpacia]

My urfave/cli version is

v2.27.1

Checklist

• Are you running the latest v2 release? The list of releases is here.
• Did you check the manual for your release? The v2 manual is here
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Dependency Management

My project is using Go modules.

Describe the bug

My program called emu is built with this great module. Let's say emu has the following commands:

• kill
• run
• list

The list command also has an alias ls.

The problem is that both list and ls are shown in shell completion ("TAB completion"), which doesn't make much sense and is annoying:

emu.mov

To reproduce wrong behavior

1. Create an app that has at least 1 command with 2 or more aliases
2. Try to use shell completion for that app
3. Notice bug

Expected behavior

Aliases are not shown in shell completion. This is how huge, popular CLI projects like gh or docker do it:

$ docker image list --help

Usage:  docker image ls [OPTIONS] [REPOSITORY[:TAG]]

List images

Aliases:
  docker image ls, docker image list, docker images

... <omitted>

Screen.Recording.2024-03-11.at.01.53.36.mov

(in Docker's case, ls is the main command and list is an alias - so my point is still valid).

Want to fix this yourself?

Sure!

Run go version and paste its output here

go version go1.22.1 darwin/arm64

Run go env and paste its output here

GO111MODULE=''
GOARCH='arm64'
GOBIN=''
GOCACHE='/Users/bartek/Library/Caches/go-build'
GOENV='/Users/bartek/Library/Application Support/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='arm64'
GOHOSTOS='darwin'
GOINSECURE=''
GOMODCACHE='/Users/bartek/go/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='darwin'
GOPATH='/Users/bartek/go'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/opt/homebrew/Cellar/go/1.22.1/libexec'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/opt/homebrew/Cellar/go/1.22.1/libexec/pkg/tool/darwin_arm64'
GOVCS=''
GOVERSION='go1.22.1'
GCCGO='gccgo'
AR='ar'
CC='cc'
CXX='c++'
CGO_ENABLED='1'
GOMOD='/Users/bartek/projects/emu/go.mod'
GOWORK=''
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
PKG_CONFIG='pkg-config'
GOGCCFLAGS='-fPIC -arch arm64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -ffile-prefix-map=/var/folders/r6/5z0bypqn4cb8p369zlrfhw3c0000gn/T/go-build1695057898=/tmp/go-build -gno-record-gcc-switches -fno-common'