sogaiu

Re-integrate jpm into janet
from "jpm fails to install spork/json and other native modules"

So Janet's built-in installation is not really intended to be compatible with Linux installation paths and structure, and was designed in such a way to require only a single JANET_PATH for configuration.
clarfication remark

basic info
- model code (from Settings -> About phone -> Status Information): SM-N981NZNEKOO
- looks like qualcomm snapdragon 8250 (via CPU Info app)
- specs
- twrp

	(defn capture-empty-element
	[& args]
	(def sname (first args))
	(case (length args)
	0 (errorf "expected one or more args, got 0")
	#
	1 {:tag sname}
	#
	{:tag sname
	:attrs (table ;(drop 1 args))}))

	#! /usr/bin/env janet

	# based on:
	#
	# https://codeberg.org/veqq/rss-reader/src/branch/master/rss-reader.janet

	# usage: pass feed urls on command line

	# requirements:
	#

	(defn visit
	``
	Traverse directory tree starting at `path`, applying
	argument `a-fn` to each encountered file or directory path.
	``
	[path a-fn]
	(assertf (is-dir? path)
	"expected dir but got: %n" (os/stat path :mode))
	(def seen? @{})
	#

	# `(next x)` can be used as a synonym for `(not (empty? x))`

	# if `next` returns `nil`, the argument is empty.
	(next [])
	# =>
	nil

	# if `next` returns non-nil, the argument is not empty.
	(next [:a :b])
	# =>