lunatechian (lunatech-ian) - programming

Postmortem from 2028

nospam@example.com (Raj Shekhar) — Sun, 22 Feb 2026 23:03:46 +0000

From The 2028 Global Intelligence Crisis: A Thought Exercise In Financial History, From The Future

What follows is a scenario, not a prediction.

[...]

A competent developer working with Claude Code or Codex could now replicate the core functionality of a mid-market SaaS product in weeks. Not perfectly or with every edge case handled, but well enough that the CIO reviewing a $500k annual renewal started asking the question “what if we just built this ourselves?”

[...]

The interconnected nature of these systems weren’t fully appreciated until this print, either. ServiceNow sold seats. When Fortune 500 clients cut 15% of their workforce, they cancelled 15% of their licenses. The same AI-driven headcount reductions that were boosting margins at their customers were mechanically destroying their own revenue base.

One Weird Trick to Fix Linker Errors on Apple Silicon After Restore

nospam@example.com (Raj Shekhar) — Mon, 28 Jul 2025 04:49:00 +0000

This post might be useful for maybe like 10 people who are running into issues when compiling software on Apple M* machines.

If you run into error like this:

ld: warning: ignoring file '/usr/local/lib/libpng.dylib': found architecture 'x86_64', required architecture 'arm64'
ld: warning: ignoring file '/usr/local/lib/libavformat.dylib': found architecture 'x86_64', required architecture 'arm64'

And you have installed these packages using brew. I verified that these dylibs are definitely for x86_64 and the linker was not going crazy. (use lipo -archs /usr/local/lib/libavformat.dylib)

Well, that was caused because I had installed the new M3 macbook from backup (Timemachine) and the backup was created from an x86_64.

The fix is described here

brew bundle dump --global
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/uninstall.sh)"
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
brew bundle install --global

This first creates a ~/.Brewfile and then installs back those packages.

build your own base debian docker image

nospam@example.com (Raj Shekhar) — Mon, 21 Jan 2019 03:46:07 +0000

This is for somewhat paranoid people. I am not a fan of grabbing docker images from docker hub, especially for base OS images. I would rather build my own images, the process is not too complex. Below is the quick way to get a base debian os container build:

sudo apt-get install debootstrap
sudo debootstrap jessie jessie/
sudo sh  -c "cd jessie/ && tar cf ../jessie.tar ."
sudo sh -c "docker import - debootstrap/jessie < jessie.tar"

Now you can check if you have the images:

$ sudo docker images

REPOSITORY              TAG                 IMAGE ID            CREATED             SIZE
debootstrap/jessie      latest              814d88e17a23        15 minutes ago      274MB

$ sudo docker run -i -t debootstrap/jessie /bin/bash
root@92d078f4f147:/# lsblk ^C

Faster setup of virtualenv with devpi

nospam@example.com (Raj Shekhar) — Sat, 29 Nov 2014 19:18:43 +0000

Setting up the virtualenv can take a significant amount of time because it pulls down packages from PyPI. I was surprised that it does not try to use the locally installed packages. One way to speed up the rebuild is to use a local caching mirror of PyPI. This can be accomplished by using devpi.

Step 1: Install devpi package

sudo pip install devpi

Step 2: Add the following lines in your /root/.pip/pip.conf file

[global]
index-url  = http://localhost:3141/root/pypi/+simple/
extra-index-url  = https://pypi.python.org/simple/

From now on, pip will first try to get the package from devpi-server running on your localhost first and if you do not have devpi-server running, will fallback to pypi.python.org .

Step 3: Start the devpi-server on your localhost: devpi-server. Try installing a few packages or build a virtualenv. The command devpi-server -start will start the server and put it in background.

TODO - figure out how to start this from init.

They’re our servants, tools

nospam@example.com (Raj Shekhar) — Thu, 02 May 2013 18:48:49 +0000

"You can see that our real problem is another thing entirely. The machines only do figuring for us in a few minutes that eventually we could do for our own selves. They’re our servants, tools. Not some sort of gods in a temple which we go and pray to. Not oracles who can see into the future for us. They don’t see into the future. They only make statistical predictions—not prophecies. There’s a big difference there, but Reinhart doesn’t understand it. Reinhart and his kind have made such things as the SRB machines into gods. But I have no gods. At least, not any I can see."

— The Variable Man, by Philip K. Dick

Caching is not a silver bullet

nospam@example.com (Raj Shekhar) — Wed, 16 Feb 2011 15:55:03 +0000

Let us take a this hypothetical situation. You have to serve a web page. You want the whole page to be sent back in 500 ms (milliseconds). If your user has a good network and he is not too far from your webserver, you can further assume that around 50 ms will be spent on the network. This means that you have 450 ms to collect all the data about this web request, do the fancy manipulations (sorting/filtering/updating files etc.) and serve it to the user. You need to make four external calls to get this data - 2 of them to an external web service and 2 of them to your own database.

Now assume that one of your external webservice calls take one second to send back the result 50% of the time and one of your database queries can take upto a second to give back the result 25% of the time. What will you do to make sure none of your users ever have to wait for more than 500 ms to get back the page? (500 ms excludes the time taken to download the images/css/do fancy javascript magic).

Higher Order Perl

nospam@example.com (Raj Shekhar) — Sun, 03 Jan 2010 22:25:53 +0000

I am in love with the book Higher-Order Perl, especially the technique in the Chapter 2: Dispatch Tables.

GPL still matters

nospam@example.com (Raj Shekhar) — Wed, 12 Aug 2009 15:48:35 +0000

Today morning I came across this piece of writing - Does GPL still matter?. The whole article is based on a few anecdotes from CEOs and marketing droids. They have gotten quite a few points wrong in the article.

GPL is a developer friendly license. The basic premise of the GPL is that the user should not subtract from the freedom he gets when redistributing software. GPL is not restrictive. It merely insists that whoever takes from the common pool must contribute back to the pool.

I would like to point to these 2 articles in support of GPL -

interesting meetup on July 14

nospam@example.com (Raj Shekhar) — Wed, 15 Jul 2009 18:13:06 +0000

I attended the Hackers and Founders meetup yesterday. It was a high energy meetup and I liked it. When I walked in, I was already 2 hours late but there were still quite a few people around. I walked in, took a name tag and tried to "merge in". Merging was easy - the folks were friendly and did not mind if you joined the discussion.

Some observations

I did not have a good answer for "what are you working on right now" . This made me realize that from a technology perspective, I have not worked on anything interesting for some time now. I have tinkered with a few things in the past 6 months (man!), but have not really done a deep dive on any of them.
There was a focus on programming language in the group. I am not sure if the choice of a programming language is really a big deal when creating a webapp. Rails, PHP, Python, Perl, Java - all have a good web framework. One of the arguments was that it would be difficult to organize PHP code in a coherent manner. In my opinion, that is a matter of discipline instead of language.
I did not find people thinking of totally different ideas. Or maybe, the folks were not telling those ideas . The ideas floated around ads, community, social networking, websites etc.
I am not a unique case when it comes to the case of creating a startup. A few folks there had a regular job and were planning on side projects.

benefit of scripting lanuguage

nospam@example.com (Raj Shekhar) — Sat, 27 Dec 2008 19:01:09 +0000

I am using a Mac now, and this blog post is brought to you by the same php and lisp scripts that I was using on my linux box. Cheers!

debugging malloc

nospam@example.com (Raj Shekhar) — Tue, 11 Nov 2008 17:21:30 +0000

Have you read the man malloc page recently? Did you notice this section there

Recent versions of Linux libc (later than 5.4.23) and GNU libc (2.x) include a malloc implementation which is tunable via environment variables. When MALLOC_CHECK_ is set, a special (less efficient) implementation is used which is designed to be tolerant against simple errors, such as double calls of free() with the same argument, or overruns of a single byte (off-by-one bugs). Not all such errors can be protected against, however, and memory leaks can result. If MALLOC_CHECK_ is set to 0, any detected heap corruption is silently ignored; if set to 1, a diagnostic is printed on stderr; if set to 2, abort() is called immediately. This can be useful because otherwise a crash may happen much later, and the true cause for the problem is then very hard to track down.

So, you can do export MALLOC_CHECK_=1 and malloc will print debugging messages to the stderr.

lunatech-journal.el

nospam@example.com (Raj Shekhar) — Mon, 20 Oct 2008 15:45:30 +0000

I have created a emacs major mode, called lunatech-journal, that I use for blogging. It is a derived mode from muse-mode, an excellent mode for writing and publishing.

Currently, it has following functions defined

lunatech-journal-skeleton - loads a skeleton for blogging
lunatech-journal-show-hints - shows a buffer with questions to help me blog about my day
lunatech-journal-make-html - creates a html file from the muse-mode
lunatech-journal-preview - allows me to preview my journal in the browser

I use a php script to post the blog entry to the website. To use it, I have the following in my .emacs file

(defun journal ()
  (interactive)
  (find-file "~/blog/journal.muse")
  )
(require 'lunatech-journal)
(add-to-list 'auto-mode-alist '("journal\\.muse\\'" . lunatech-journal-mode))

When I feel the need to blog, I do M-x journal, I get dropped into my journal file and I can blog.

Links:

lunatech-journal.el - the blogging mode
Playing with your blog's xml-rpc interface shows the php script that I use to post entries to my blog
MuseMode

testing, testing

nospam@example.com (Raj Shekhar) — Thu, 09 Oct 2008 07:43:37 +0000

testing, testing - 1, 2, 3

I should now be able to set the categories of my post.

This post is brought to you by emacs, php and lots of cups of tea.

Release of PythonOnPlanes-1.3.07 aka. SuperSunday release

nospam@example.com (Raj Shekhar) — Sun, 01 Apr 2007 17:50:41 +0000

What is PythonOnPlanes ?

PythonOnPlanes is a rapid development framework for Python which uses commonly known design patterns like ActiveRecord, Association Data Mapping, Front Controller and MVC. Our primary goal is to provide a structured framework that enables Python users at all levels to rapidly develop robust web applications, without any loss to flexibility.

See the Features list below to learn more about the framework.

Release Announcement

The Release Engineering Team is happy to announce the availability of PythonOnPlanes-1.3.07 , the latest release of the PythonOnPlanes Stable development branch. Since PythonOnPlanes-1.3.06 release we have made many improvements in functionality, stability, performance, and mod_snake_oil support for Apache web servers, as well as dealt with known security issues and made many bugfixes.

Major highlights in the release include Active Scrum Manager 1, Sanity Preserver 3.13 and Lart 22.21. This is also the first release with the PythonOnPlanes Live CD Installer officially debuting on the x86 platform.

Features

The software development world is moving towards AGILE DEVELOPMENT, WEB-2.OH, GURU PRESENCE and LEAN SOFTWARE. Our Framework is geared to support all these features.

"Out of the box" features available

Out of the box PythonOnPlanes supports

Sprint Management
Pair programming using an editor that can be shared by 2 developers. We have named it ALN (Analog Large Notebook)
LoC2LoC to generate a report on each developer's productivity.
Active Suggest DESIGN PATTERN (ASDP). This feature will make your refactoring efforts a snap

Beta Experimental Features

These features are not enabled by default and you have to enable them by editing the configuration file.

Developers' Blog . Each developer in the team is given a blog which he can update. If enabled, PythonOnPlanes will generate a daily report of the developer activity log and post it on the blog too
CutesyErrorMessages-0.0.1-BETA. This replaces stern error messages with very user friendly messages

GET PythonOnPlanes-1.3.07 IN NO TIME

Download PythonOnPlanes-1.3.07 from <http://pythononplanes.com/>

RIP John W. Backus

nospam@example.com (Raj Shekhar) — Wed, 21 Mar 2007 10:34:22 +0000

The "B" in "BNF" is gone. NY Times has a nice artilce about him and his noteworthy quote is tucked in at the end

Innovation, Mr. Backus said, was a constant process of trial and error.

"You need the willingness to fail all the time," he said. "You have to generate many ideas and then you have to work very hard only to discover that they don't work. And you keep doing that over and over until you find one that does work."

Link: John W. Backus, 82, Fortran Developer, Dies - New York Times