BASH completion for ssh-add */etc/bash_completion.d/ssh-add*

ssh-add.bash

# Bash completion for ssh-add

_ssh_add() {
        local cur prev words cword
        _init_completion || return

        local flags=(
                -l --list
                -L --list-public
                -d --delete
                -D --delete-all
                -x --lock
                -X --unlock
                -c --confirm
                -k --no-confirm
                -q --quiet
                -t --life
                -E --hash
                -h --help
        )

        local time_examples="2h 4h 8h"
        local hash_algos="md5 sha1 sha256"

        # Provide completions for options expecting arguments
        case "$prev" in
        -t | --life)
                COMPREPLY=($(compgen -W "$time_examples" -- "$cur"))
                return 0
                ;;
        -E | --hash)
                COMPREPLY=($(compgen -W "$hash_algos" -- "$cur"))
                return 0
                ;;
        esac

        if [[ "$cur" == -* ]]; then
                COMPREPLY=($(compgen -W "${flags[*]}" -- "$cur"))
                return 0
        fi

        # Complete identity files in ~/.ssh matching _id patterns
        local ssh_dir=~/.ssh
        if [[ -d "$ssh_dir" ]]; then
                local file
                local matches=()
                for file in "$ssh_dir"/*; do
                        [[ -f "$file" ]] || continue
                        local base=$(basename "$file")
                        if [[ "$base" == id_* || "$base" == *_id || "$base" == *_id_* ]] && [[ "$base" != *.pub ]]; then
                                [[ "$file" == "$cur"* ]] && matches+=("$file")
                        fi
                done
                COMPREPLY=("${matches[@]}")
        fi

        return 0
}

complete -F _ssh_add ssh-add