bash/bashrc.d/vared.bash


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30

# Requires Bash >= 4.0 for read -i and ${!name}
((BASH_VERSINFO[0] >= 4)) || return

# Edit named variables' values
vared() {
    local opt prompt
    local OPTERR OPTIND OPTARG
    while getopts 'p:' opt ; do
        case $opt in
            p)
                prompt=$OPTARG
                ;;
            \?)
                printf 'bash: %s: -%s: invalid option\n' \
                    "${FUNCNAME[0]}" "$opt" >&2
                return 2
                ;;
        esac
    done
    shift "$((OPTIND-1))"
    if ! (($#)) ; then
        printf 'bash: %s: No variable names given\n' \
            "${FUNCNAME[0]}" >&2
        return 2
    fi
    local name
    for name do
        IFS= read -e -i "${!name}" -p "${prompt:-"$name"=}" -r -- "${name?}"
    done
}