Initial zsh completion support (for generic-based packages)

Former-commit-id: 17f1773c8653e8525fd58380a34f6574473ed62c
Former-commit-id: 3c90b366b8c9ad3c083110d0c9b0f19080fbdea7

extra/completion.bash

@@ -0,0 +1,45 @@
+#!/usr/bin/env bash
+
+_path_gen() {
+    local sshyp_path="$HOME/.local/share/sshyp"
+    local glob_status=$(shopt -p globstar)
+    [ -z "${glob_status##*u*}" ] && shopt -s globstar  # if recursive globbing is disabled, enable it
+    full_paths=("$sshyp_path"/**/*.gpg)
+    $glob_status  # set recursive globbing to user default
+    for path in "${full_paths[@]}"; do
+        trimmed_paths+=("${path:${#sshyp_path}:-4}")
+    done
+} &&
+
+# from this point, this completions script was partially generated by
+# completely (https://github.com/dannyben/completely)
+
+_sshyp_completions() {
+  local cur=${COMP_WORDS[COMP_CWORD]}
+  local compwords=("${COMP_WORDS[@]:1:$COMP_CWORD-1}")
+  local compline="${compwords[*]}"
+
+  if [ "${#COMP_WORDS[@]}" -gt "2" ] && echo "${COMP_WORDS[@]}" | grep -q 'shear'; then
+    return
+  elif [ "${#COMP_WORDS[@]}" -gt "3" ] && (! echo "${COMP_WORDS[@]}" | grep -q '/' || echo "${COMP_WORDS[@]}" | grep -q 'shear'); then
+    return
+  elif [ "${#COMP_WORDS[@]}" -gt "4" ]; then
+    return
+  fi
+
+  if [[ "$compline" == *'edit'* ]]; then
+    while read -r; do COMPREPLY+=( "$REPLY" ); done < <( compgen -W "relocate username password note url" -- "$cur" )
+  elif [[ "$compline" == *'copy'* ]]; then
+    while read -r; do COMPREPLY+=( "$REPLY" ); done < <( compgen -W "username password url note" -- "$cur" )
+  elif [[ "$compline" == *'add'* ]]; then
+    while read -r; do COMPREPLY+=( "$REPLY" ); done < <( compgen -W "password note folder" -- "$cur" )
+  elif [[ "$compline" == *'gen'* ]]; then
+    while read -r; do COMPREPLY+=( "$REPLY" ); done < <( compgen -W "update" -- "$cur" )
+  elif [[ "$compline" == '/'* ]]; then
+    while read -r; do COMPREPLY+=( "$REPLY" ); done < <( compgen -W "add gen edit copy shear" -- "$cur" )
+  else
+    while read -r; do ITEM=${REPLY// /\\ }; COMPREPLY+=( "$ITEM" ); done < <( compgen -W "help version tweak add gen edit copy shear sync $(printf "'%s' " "${trimmed_paths[@]}")" -- "$cur" )
+  fi
+
+} &&
+_path_gen && complete -F _sshyp_completions sshyp