[bash/fish] pacman: List optional dependencies for all installed packages

list_optional_deps.fish

function list_optional_deps
    for pkg in (pacman -Qeq)
        set -l deps (pacman -Qi $pkg | awk '
            BEGIN {flag=0}
            /^Optional Deps/ {
                flag=1;
                sub(/^[^:]+:[ \t]*/, "");
                print;
                next
            }
            /^[^ \t]/ { if(flag==1) exit }
            { if(flag==1) {
                sub(/^[ \t]+/, "");
                sub(/^:[ \t]*/, "");
                print
            } }
        ')
        if test (count $deps) -eq 0 -o "$deps[1]" = "None"
            continue
        end

        printf "%sPackage: %s%s\n" (set_color blue) $pkg (set_color normal)

        for dep in $deps
            set -l pkg_name (string replace -r '^([^: >=<]+).*' '$1' -- $dep)
            if pacman -Qq "$pkg_name" >/dev/null 2>&1
                printf "%s    %s%s\n" (set_color green) $dep (set_color normal)
            else
                printf "%s    %s%s\n" (set_color red) $dep (set_color normal)
            end
        end

        echo
    end
end

list_optional_deps.sh

#!/bin/bash

list_optional_deps() {
    local blue="\033[34m"
    local green="\033[32m"
    local red="\033[31m"
    local reset="\033[0m"
    
    for pkg in $(pacman -Qeq); do
        local deps=$(pacman -Qi "$pkg" | awk '
            BEGIN {flag=0}
            /^Optional Deps/ {
                flag=1;
                sub(/^[^:]+:[ \t]*/, "");
                print;
                next
            }
            /^[^ \t]/ { if(flag==1) exit }
            { if(flag==1) {
                sub(/^[ \t]+/, "");
                sub(/^:[ \t]*/, "");
                print
            } }
        ')
        
        if [ -z "$deps" ] || [ "$deps" = "None" ]; then
            continue
        fi

        printf "${blue}Package: %s${reset}\n" "$pkg"

        while IFS= read -r dep; do
            local pkg_name=$(echo "$dep" | sed -E 's/^([^: >=<]+).*/\1/')
            
            if pacman -Qq "$pkg_name" >/dev/null 2>&1; then
                printf "${green}    %s${reset}\n" "$dep"
            else
                printf "${red}    %s${reset}\n" "$dep"
            fi
        done <<< "$deps"

        echo
    done
}