costa’s gists

costa / docker-volume-clone.sh

Created January 28, 2026 14:23

Clone a docker volume for fun and profit (stopping attached containers, if needed for data integrity, is on you)

	#!/bin/bash -e
	test "$#" -ne 2 && echo "USAGE ...docker-volume-clone <OLD> <NEW>" >&2 && exit 145
	cd "$( dirname "${BASH_SOURCE[0]}" )"/..

	docker volume create --name "$2"
	docker run --rm -v "$1:/from" -v "$2:/to" eeacms/rsync rsync -a /from/ /to/

costa / gemini

Created January 19, 2026 14:01

gemini.google.com (a genAI) "gemini cli" docker (restricted) runner script -- to be run in a project root directory

	#!/bin/bash -e

	cwd="$( pwd )"
	test -t 0 && tty_opt=t

	docker run --rm -i$tty_opt -v "$cwd:$cwd" -w "$cwd" node npx @google/gemini-cli

costa / claude

Created January 19, 2026 13:59

Claude.AI (a genAI) "claude-code" docker (restricted) runner script -- to be run in a project root directory

	#!/bin/bash -e

	cwd="$( pwd )"
	test -t 0 && tty_opt=t

	docker run --rm -i$tty_opt -v "$cwd:$cwd" -w "$cwd" node npx -y @anthropic-ai/claude-code

costa / git-hub-submodulate

Last active December 23, 2025 18:16

Do not be afraid of submodules! Run this from the umbrella repo directory, give it the path to a subdirectory with a GitHub-checked-out (sub) repo in it.

	#!/bin/bash
	test "$#" -ne 1 && echo "USAGE ...git-hub-submodulate <PATH-TO-SUB-REPO-FROM-GITHUB>" >&2 && exit 145
	git submodule add --name "$1" "$( git -C $1 config --get remote.origin.url )" "$1"

costa / expect_in_time_spec_helper.rb

Last active June 25, 2025 12:00

expect_in_time (a simple "macro" for your simple RSpec polling and timing-out needs)

	# Polling expectation blocks with total timeouts
	# NOTE the `expect`s go in the block, e.g. `expect_in_time(3) { expect(q.pop).to eq 'fin' }`
	# NOTE beware of polling busy wait, insert `sleep`s in the block as needed
	require 'timeout'

	def expect_in_time(sec, &blk)
	errors = []
	begin
	Timeout.timeout sec do
	begin

costa / logging_handlers_httphandler_json.py

Last active February 21, 2025 17:22

Python (3.12+ish tested) logging.handlers.HTTPHandler JSON support monkey-patching

	# NOTE Le monkey patch
	# (https://github.com/python/cpython/blob/main/Lib/logging/handlers.py as of 2025-02-19)

	def http_json_emit(self, record):
	"""
	Emit a record.

	Send the record to the web server as a percent-encoded dictionary
	"""
	try:

costa / git_helper.rb

Last active September 21, 2024 10:49

Git-based "report-skip-retry" RSpec helper for detailing code version releases and more efficient testing -- just `require` it in your spec_helper.rb

	# NOTE As seen at https://gist.github.com/costa/f9ae7184ca254b25f98872ae7a170358
	#
	# Keeps spec (https://RSpec.info) test results (as YAML) in Git commit messages
	#
	# NOTE Makes sense for heavy or lengthy (e.g. manual) tests, both for
	# - documenting the results in the repo
	# - splitting testing sessions

	require 'yaml'
	require 'git'

costa / manual_helper.rb

Last active October 23, 2024 07:46

Manual (e.g. human-terminal-based) RSpec helper -- just `require` it in your spec_helper.rb

	# NOTE As seen at https://gist.github.com/costa/1f7a77d0949a1ee1f612fcd35b4fc23e
	#
	# Enables proper manual (human operator / QA) testing (with https://RSpec.info)
	#
	# NOTE It is recommended to tag manual specs with `, manual: true`,
	# -- so they can be skipped with `$ rspec -t ~manual` when human is not present.
	#
	# DSL:
	# - #explain "<MESSAGE-TO-OPERATOR>"
	# - #demand "<OPERATOR-TO-CHECK>"

costa / integ_spec.rb

Created June 29, 2024 14:51

drv/icloud's formal specification (with RSpec, excerpt) -- a part of self server system

	# ...definitions...
	describe "REST API" do
	# ...
	context "when authenticated, with a sample video" do
	# ...setup...
	describe 'PUT /media/YYYY/MM/DD/IMG_NNNN.MOV' do
	it "downloads media (a video) if it doesn't exist" do
	expect(File.exist? video_path).not_to be
	rest_put({}, "media/#{@media_path}")
	expect_in_time 30 do # NOTE the file just started to download

costa / integ_spec.rb

Created June 29, 2024 14:23

vlog-youtuber's formal specification (with RSpec, excerpt)

	# ...definitions...
	describe "Automated publishing" do
	# ...setup...
	it "should happen whenever .pub.video is comitted to 'log' git repo" do
	expect((channel_ids = api_get).length).to eq 1
	expect(youtube_channel_url = api_get(channel_ids[0])[:pub_url].to_s).not_to be_empty
	Dir.chdir LOG_PROJ_DIR do
	sample_pub_video_path = File.join(TODAY_DATE_PATH, 'chang-wash-fun.pub.video')
	sample_pub_ffmprb_path = File.join(TODAY_DATE_PATH, 'chang-wash-fun.pub.ffmprb')
	sample_pub_video_text =

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