Peter Mescalchin magnetikonline

macOS execute command upon directory change via `launchd`

Using launchd to watch a filesystem directory and upon create/change to a file with the directory, execute a command.

Install

For this example:

Watching directory of: /path/to/watch.
Upon file change, execute: /path/to/command argument1 argument2.

Docker volume backup and restore scripts

Backup a Docker volume to tar archive:

$ ./docker-volume-backup.sh \
  DOCKER_VOLUME_NAME \
  ARCHIVE_NAME.tgz

Node.js strict mode enabled?

A quick test, this relies on the fact that this will not exist and point to the global scope when running in strict mode.

console.log('strict:',(function() { return (this === undefined); })());

Tip

Strict mode is enabled by default within ES module enabled packages.

Import all GPG keys for GitHub organisation users

Fetches a GitHub organisation member list and proceeds to gpg --import public GPG key(s) for each member associated against their profile.

Requires:

curl for GitHub API calls
jq for parsing GitHub REST API responses
and (obviously) gpg

Python - hashing JSON data structures

A function hash_json(data), accepting a structure loaded from json.load() and computing a hash.

Example

$ ./hashjson.py
Hash a.json: 8212462b8e9ce805cac2f0758127c5cfd7710baf
Hash b.json: 8212462b8e9ce805cac2f0758127c5cfd7710baf

Install `jq` on macOS from source

Note: as of jq v1.7 the project offers pre-built native macOS releases for ARM64 based architechtures.

A quick n' dirty Bash script to install the following:

autoconf.
automake.
libtool
jq - from source.

`npm` wrapper to ensure `npm publish` from clean Git repository

Tip

By default npm publish will publish all files within a working directory - excluding .gitignore / .npmignore / package-lock.json.

This is typically fine, but often I find myself leaving un-staged files (e.g. TODO.txt files) in a repository root and these of course get accidently taken along for the publish ride.

Helper script npm-publish-wrap.sh will catch calls to npm publish and:

Ensure I'm at the root of a repository (.git directory) found.

Datadog list all installed integrations

From what I can see, there is no simple way to extract a list of installed Datadog integrations for documentation/etc. purposes.

Here is a lo-fi method of pulling it from the web UI DOM:

Visit the Integrations page for your Datadog account.
Open browser web developer tools.
Execute the following from the JavaScript console:

	root = true

	[*]
	charset = utf-8
	end_of_line = lf
	indent_size = 2
	indent_style = tab
	insert_final_newline = true
	trim_trailing_whitespace = true

	{
	"root": true,
	"parserOptions": {
	"sourceType": "module"
	},
	"env": {
	"es2020": true,
	"node": true
	},
	"extends": [