Install GitHub CLI on a Go-less system using Go in Docker

ghcli-build.sh

#! /usr/bin/env bash
#
# Install GitHub CLI on a Go-less system using Go in Docker.
#
set -ex

# latest stable release
GHCLI_VER=v2.38.0
GO_VER=1-bookworm

main() {
    src
    cd gh-cli.git
    git switch --detach $GHCLI_VER

    img
    #bld
    #tst
    ins

    cd ..
    cln
}

src() {
    ! test -d gh-cli.git ||return 0
    git clone git@github.com:cli/cli.git gh-cli.git
}

img() {
    docker build -t build-ghcli - <<-EOF
	FROM golang:$GO_VER

	# give make build proper perms in .:/gh-cli
	RUN useradd --uid $UID --gid "${GROUPS[0]}" \
	    --create-home --shell /bin/bash $USER

	WORKDIR /gh-cli
	EOF
}

bld() {
    docker run --rm \
      --volume "$PWD:/gh-cli" \
      --user "$UID:${GROUPS[0]}" \
      build-ghcli \
      make
}

tst() {
    docker run --rm \
      --volume "$PWD:/gh-cli" \
      --user "$UID:${GROUPS[0]}" \
      build-ghcli \
      make test
}

ins() {
    docker run --rm \
      --volume "$PWD:/gh-cli" \
      --volume "$HOME/.local:/.local" \
      --user "$UID:${GROUPS[0]}" \
      build-ghcli \
      make install prefix=/.local
}

cln() {
    rm --force --recursive gh-cli.git
    docker image rm build-ghcli
}

main
exit 0