Welcome to the lab.

Revisiting appinfo: Mac app details from the command line

A few years back I wrote a little script called appinfo to make getting info about an installed application a little simpler (and prettier). It’s served me well over the years. I added a couple of things to it today and figured I’d mention it again.

This script is a lot like doing a Get Info on an app in Finder, just without having to open your Applications folder, or having to expand hidden sections in the info window. Just type appinfo APP_NAME to get instant, pertinent info. One common application is getting the bundle identifier for an app, for use in scripting (or with Bunch).

First, I added an architecture check. Back in 2017 only Intel binaries mattered, so that wasn’t included. Now it will tell you if the app is compiled for Intel, Apple Silicon, or both.

I also added handling for info returned by mdls as arrays, so keys like “Alternate Names” and Architecture can be output in a friendly way. This means you can also add new keys to the script’s config section with abandon.

Just for fun, I added support for chafa (in addition to the existing support for imgcat). If you have one of these installed and your terminal supports it, the app icon will be included in the info output.

That’s it. An update simple simple enough that I actually have time to write about. Unlike what’s happening with doing right now… once I finish the current version of that, I’m going to need a couple hours to detail what I’ve done to it lately.

Check out the script in this gist. Just save it in your path as appinfo and make it executable with chmod a+x appinfo. It takes the name of the app you want info for (must be installed on your machine): e.g. appinfo Preview.

Web Excursions for October 19, 2021

Web excursions brought to you in partnership with CleanMyMac X, all the tools to speed up your Mac, in one app.

BFG Repo-Cleaner
A simpler, faster alternative to git-filter-branch for deleting big files and removing passwords from Git history. I shrunk a 2GB repo to 800 MB in under 10 minutes with this tool. Handy.
Browser extension to auto close tabs left open by zoom meeting application. Works as advertised.
‎Workona for iPad
Workona is the browser extension (Chrome, Firefox, Edge) I wouldn’t want to be without (I’m still hoping for a Safari version). They now have an iPad app that lets you access all of your workspaces and open tabs from the iPad, and you can add a tab or resource to a workspace from the iOS share button. Very handy. Hope it’s eventually available for iPhone as well…
Between adding this bookmark to the excursion and actually publishing it, Workona has finally started charging for their more “premium” features. Insta-subscribe for me, and hopefully indicates some longevity.
There are a bunch of tools for colorizing command line output/log files. This one took the least amount of my day to get it working perfectly with custom log output using a few regular expressions in an easy-to-grok settings file. A++.
Acquiring A Product: Our Kaleidoscope Journey
I’m super excited about the future of what I consider to be the hands-down best Mac diff tool. Newly under the stewardship of some excellent indie mac devs, version 3 is a massive improvement that represents a ton of hard work. Here’s some background on their acquisition of this great app, and a bit of its storied history.

CleanMyMac X

See what you’re “doing” in the iTerm status bar

First of all, there have been some major updates to Doing over the last few weeks (changelog), so be sure to update to the latest version (gem update doing). If you don’t know what Doing is and started reading this post anyway, go check it out first.

I’ve been playing with incorporating Doing into my iTerm status bar. It’s already in my Touch Bar, but having it right below my prompt in my terminal seemed super handy. The method I’m using might seem a bit convoluted, but it’s working great.

This whole thing is based around iTerm’s user variables and interpolated strings. Once set, the variable can be used in status bars, window titles, session badges, etc. You just have to keep it updated, so some hooks are required. Here’s how I got it working.

Just your average project update and wellness check-in

I’ve done a lot of coding in the last two weeks. Playing with projects, adding features, fixing bugs, writing tests. I’ve done a lot of learning Vim (I’m writing this post in Vim, I think I like it). Some day I’ll feel like I’ve learned something in Vim that would actually surprise anybody and I’ll write it up. For now, I’m just playing catch up.

Wellness check

We’ll do this Overtired style, mental health corner at the top of the show…

I had a few manic days last week and am riding out this lull before depression hits. I’ve had depression that wasn’t preceded by mania, but I’ve never had mania that wasn’t followed by depression. Oh, in case you missed it, I’m bipolar. And I’m trying to talk about it more because, well, it’s scary to talk about.

I’m also ADHD, which can be a horrible combination. One symptom of ADHD is hyperfocus, where you can focus on one thing to the exclusion of all others. The problem is, that one thing is almost never the thing that most needs focus at the time. And when I’m manic, hyperfocus goes into overdrive and I have even less control than usual of where it goes.

I actually managed to focus pretty well on day job stuff. Set some impressive precedents that will definitely bite me when the inevitable downturn happens. Hopefully it will be manageable. I gotta get stabled out.

In the meantime, and in addition to doing a great job at work, I updated a bunch of projects. Here’s a rundown.

A Keyboard Maestro macro for cross-linking Markdown docs

Ok, this is one of my other projects from last weekend. In its present state it has a more limited scope of appeal than my Howzit updates, but the idea could easily1 be modified to work with any project that consists of a bunch of Markdown documents.

I designed this for use when working on my Jekyll-based documentation sites. Jekyll actually isn’t the important part, it just requires the files to have YAML headers with a title key, and any manually-specified header IDs to be in Kramdown’s format:

## My Title {#id}

If you were to change the handling of both of those requirements, any folder containing a bunch of Markdown files would work. The rest of the macro is all based on easily-configured templates.

Anyway, what it does is create a shortcut (lnk//) that, when typed, offers a spotlight-esque search through all of the other documents in the project (and the headlined sections they comprise), and when you choose one, it inserts a templated link to it relative to the project root, including a #fragment to link a specific headline.

The first time you run it, it will ask for your root directory and link template. The directory is a POSIX path, e.g. /Users/me/Sites/dev/bunch, and the link template allows placeholders in the format <path>. Available placeholders are:

  • <path>: Full path from the DocsDir root (e.g. “/subdir/file”)
  • <dir>: Directory portion of path (e.g. “/subdir”)
  • <file>: Filename portion of path (e.g. “/file”)
  • <frag>: Headline ID, empty if none (e.g. “#fragment”)

All extensions are removed from the paths, and all placeholders except for <ext> and <frag> have leading slashes (<frag> gets a leading #). So my template for the Bunch docs is:


To change configuration later, type lnk\\ (with backslashes) and you’ll be able to enter a new directory and optionally change the template.

Now, just type lnk// in your Markdown document, type a few characters of the page you want to link to, hit return, and you have a correct link to the topic you wanted to reference.

That’s it. It’s pretty simple. It actually started off as a TextExpander snippet, but that would take a search string and insert the first matching document. The matching was a little more flexible, but I really liked Keyboard Maestro’s “Prompt with List” interface and the ability to refine a search on the fly. You have to put a space between search terms to represent path breaks, e.g. to match “docs/bunch-files/commands/awake” you would need a space where the slash goes: “comm awa” would find it.

There’s also a version included that works on selected text using a keyboard shortcut (defaults to ⌃⌥⇧L). It uses the selected text as the initial search, which can be hit and miss but is great for wiki-style linking. I mostly use the text-triggered one, though.

Markdown Document Search for Keyboard Maestro v1.0.0

Keyboard Maestro macros for cross-linking in Markdown document collections (e.g. Jekyll pages)

Published 08/30/21.

Updated 08/30/21. Changelog

DonateMore info…

  1. If you know a little Ruby and regex… 

Howzit gets templates

I had a bit of a manic coding week this last week. Which probably means I’m headed for some depression soon, so I wanted to write about at least one of the things I’ve worked on recently before I lose motivation. So let’s start with Howzit, my little CLI for tracking all of the build settings and other notes for your coding projects.

I added the ability to run tasks from within a notes file a while back, and I use it a lot. I quickly found that there were some tasks that were common to most projects of the same type, be it ruby gems, Xcode projects, or just Markdown repositories. Projects within a type tend to use some common commands and scripts with only the target paths or build flags changing (if anything does). So to make it easy to replicate tasks between build files, I added “templates” to Howzit.

I wrote it up for the docs, so I’ll just give you a quick description and then point you there.

All you do is create a Markdown file in ~/.config/howzit/templates/ and, just like a Howzit file, add level 2 or higher headers for each topic/task followed by the notes and directives. You can use MultiMarkdown-style placeholders for variables, e.g. [%variable] inside the notes. The name of the file is the key with which you’ll reference it in your build notes.

Then, in buildnotes.md in some Markdown-based project, you would just add MMD-style metadata:

template: markdown
spelling_dirs: . docs

# My Markdown Project

spelling_dirs becomes a variable I can reference in my template, which in this case includes a Spellcheck task, and spelling_dirs tells it which directories to find Markdown files in. Variables can even have default values after a colon, e.g. [%spelling_dirs:.].

A file can reference multiple templates, and you can include only specific tasks with wildcard support in the format:

template: markdown[spellcheck,markdown lint], ruby[build*]

If you get into the template thing and have a bunch, it’ll be easy to forget what titles you gave them all and what tasks they contain, so I added a --templates flag that will show you all of your installed templates and what topics will be added when you include them. Just run howzit --templates to get the list.

Be sure to update to the latest version of the script to get all the new goodies. Someday I’ll probably package it as a gem and make updating easy, but for now you need to re-download the script and overwrite your current version.

Or you can do what I do and clone the repository from GitHub, then symlink the howzit file into a directory in your path. Then you can just do a git pull when you want to get the latest version… {.tip}

Anyway, that was my Sunday morning project. If you’ve found howzit useful before, I hope this adds some extra usability for you.

Oh yeah, and a week or two ago I also added “upstream searches,” which checks for build notes in parent directories and compiles any topics found into the notes for the current folder. It travels up to root (/), so you can have a universal build note in an ancestor directory and all topics in it will be included in descendant notes. It was the predecessor to templates (which are definitely a superior solution). Upstream searches have to be enabled in ~/.config/howzit/howzit.yaml with :include_upstream: true.

Also, if you run howzit in a subdirectory of a git repo and it doesn’t find a build notes file in the current directory, it now checks the top level of the repo for build notes and executes tasks from there. Fun stuff.

All the details on the Howzit project page.

Web Excursions for August 30, 2021

Web excursions brought to you in partnership with MindMeister, the best collaborative mind mapping software out there.

rtomayko/ronn: the opposite of roff
It’s an old project (last saw an update 8 years ago), but I’ve had great results turning (basically) Markdown files into man pages with this tool. Can output to HTML and roff, generate a TOC, and easily generate a man ready file for your command line tool.
kotfu/ksc: Generate properly formatted keyboard shortcuts
Inspired by my Jekyll plugin for the same purpose, a CLI to generate properly formatted keyboard shortcuts, including a KeyboardMaestro macro.
msanders/pam-watchid: PAM plugin module that allows the Apple Watch to be used for authentication
A PAM plugin module that allows the Apple Watch to be used for sudo authentication. This particular fork has modifications to make it work with macOS 11 on an M1 Mac.
Huemint - AI color palette generator
This is an excellent random color palette generator. I promise that if you care about colors at all, you’ll have fun playing with it.
agarrharr/awesome-macos-screensavers: 🍎 🖥 🎆 A curated list of screensavers for Mac OS X
A curated list of screensavers for macOS. Some real gems in here.

Check out MindMeister and start brainstorming, collaborating, and boosting productivity.

Custom URLs for your Synology with Namecheap

The Synology DSM has a handy built-in updater for dynamic DNS (DDNS). It makes a lot of sense, given the Synology is always on and connected to the internet, keeping a custom domain pointed to the right IP at all times.

Most people who followed this headline already know these definitions, but just to recap: dynamic DNS allows a fully qualified domain name like “example.com” to point to an IP address that changes regularly, as most home ISPs do. Unless you’re paying for a static IP, your IP is changing now and then, defeating any custom domains you point to it.

Synology’s DDNS integration comes with presets for quite a few services, but most of the free ones don’t allow you to use custom domain names, just subdomains of domains like “synology.me” or “zapto.org”. I wanted to use something short and personalized (because I’m lazy and vain, I guess).

I already had some unused domains registered with Namecheap, which offers DDNS for your domains, but Synology didn’t have a preset for it. In a lot of cases you can use the DSM to create a custom DDNS, using a URL with __PLACEHOLDERS__ in it. Namecheap doesn’t offer a URL you can curl, though, and using dynamicdns.park-your-domain.com doesn’t work with that (I’m not sure why). The good news is that it’s pretty easy to add your own Namecheap service provider to your Synology.

I found a few existing solutions for this but each of them had some failing. This solution is what I distilled from multiple sources, simplified, and currently have working.

  1. First, register the domain you want to use with Namecheap and go to the Advanced DNS configuration for the domain. Ensure that there’s a an A record for the “@” wildcard.

    Namecheap Advanced DNS

    If you want to use a subdomain as your dynamic host (e.g. “home.example.com”), add a record for it by clicking “Add New Record”, selecting A Record, and entering the subdomain (just “home” in the previous example). The IP address here doesn’t matter, the script we’ll set up will be updating that.

  2. Scroll down to Dynamic DNS, toggle the switch to enable it, and note/copy the password it shows you, we’ll use that in step 6.

  3. For this next part, you’ll need SSH access to your Synology, which you can enable with Control Panel->Terminal & SNMP.

    As an aside, I highly recommend changing the default SSH port, setting up keys, and disabling password login. Also set your Control Panel->Security setting to the highest level. Especially once you have a public domain associated with your IP, you’ll get your ports scanned frequently, and there will be regular brute force login attempts.

  4. Now, add a little script that will handle pinging an update URL with your credentials and IP. Save this script to /usr/local/bin/namecheap_ddns.sh on your Synology:

     ## Namecheap DDNS updater for Synology
     ## Brett Terpstra <https://brettterpstra.com>
     PARTS=$(echo $DOMAIN | awk 'BEGIN{FS="."} {print NF?NF-1:0}')
     # If $DOMAIN has two parts (domain + tld), use wildcard for host
     if [[ $PARTS == 1 ]]; then
     # If $DOMAIN has a subdomain, separate for HOST and DOMAIN variables
     elif [[ $PARTS == 2 ]]; then
     RES=$(curl -s "https://dynamicdns.park-your-domain.com/update?host=$HOST&domain=$DOMAIN&password=$PASSWORD&ip=$IP")
     ERR=$(echo $RES | sed -n "s/.*<ErrCount>\(.*\)<\/ErrCount>.*/\1/p")
     if [[ $ERR -gt 0 ]]; then
         echo "badauth"
         echo "good"

    Make it executable with chmod a+x /usr/local/bin/namecheap_ddns.sh.

  5. Next, we need to add the provider to the DSM configuration. You’ll need to be root to do this, so run sudo -i and enter your admin account’s password. Now edit the file at /etc.defaults/ddns_provider.conf. I have Vim installed on my Synology, but I can’t remember if it’s included by default or I added it. Use whatever you have handy, or use cat redirection to do it (copy and paste the whole block below at once):

     cat >> /etc.defaults/ddns_provider.conf << 'EOF'
  6. Go back to your Synology DSM and open Control Panel->External Access->DDNS. Click Add and you should see Namecheap in the Service Provider dropdown. Select it and enter your custom domain (including subdomain if you set that up) in the Hostname field. Username isn’t needed in our script, just paste your password from step 2 in the Password/Key field. Click “Automatic Setup” next to External Address to enter your current public IP.

    Click the Test Connection button to see if everything is working. Click OK to save.

Assuming you see Normal under the Status column, you’re now updating your custom domain with your public IP. It may take a bit for it to propagate initially, but once it does, you can access Synology DSM, Synology Drive, Filestation, and all of your packages using your custom domain and the appropriate ports. If you head to Control Panel->Security->Certificate, there’s even a wizard for adding a Let’s Encrypt SSL certificate for your new domain, allowing you to use https connections for everything.

Hope that’s useful to some Synology users out there, it was definitely a fun little hack for me.