Rancher wrapper script to follow the oauth flow to your browser

rancher

#!/usr/bin/env bash

set -ueo pipefail

# Path to the actual rancher executable
RANCHER_BIN="/opt/homebrew/bin/rancher"

# Check if the first argument is "token"
if [ "$1" = "token" ]; then
  # Monitor the output file for the authentication code
    "$RANCHER_BIN" "$@" 2>  >( while IFS= read -r line; do
        code=$(echo "$line" | perl -ne 'm/and enter the code ([A-Z0-9]*) to authenticate./ && print "$1\n"')
        if [ -n "$code" ]; then
                echo "$code" | pbcopy
                open https://www.microsoft.com/devicelogin
        fi
    done)
    exit
fi

# Passthrough: call rancher with all arguments
exec "$RANCHER_BIN" "$@"

Simpler:

#!/usr/bin/env bash

set -ueo pipefail

# Path to the actual rancher executable
RANCHER_BIN="/opt/homebrew/bin/rancher"

# Check if the first argument is "token"
if [ "$1" = "token" ]; then
    "$RANCHER_BIN" "$@" 2>  >( tee /dev/tty | while IFS= read -r line; do
        code=$(echo "$line" | perl -ne 'm/and enter the code ([A-Z0-9]*) to authenticate./ && print "$1\n"')
        if [ -n "$code" ]; then
                echo "$code" | pbcopy
                open https://www.microsoft.com/devicelogin
        fi
    done)
    exit
fi

# Passthrough: call rancher with all arguments
exec "$RANCHER_BIN" "$@"