May 31

I run into a problem where my karma run hangs (see grunt watch hangs on karma:unit:run task). After digging into it I found out that it relates to problem #1 in post etc/hosts bug and dns resolution. Upgrading to 10.8 damaged etc/hosts. DNS resolution of localhost was extremely slow.

To fix this you could use 127.0.0.1 instead of localhost or split lines in etc/hosts

Instead of

127.0.0.1 strug-imac.hypoport.local localhost

split them into single lines

127.0.0.1 localhost
127.0.0.1 strug-imac.hypoport.local

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Jun 13

Currently I’m setting up a new SSD. One of my first installations is homebrew, a must have IMO.

I have two users. Allen the admin and Stan the standard user. Stan is a developer who works most of his time inside our company network. Allen is responsible for installing apps and so on. For security reasons Stan don’t want to be admin. Nevertheless Stan wants to use homebrew, he loves it too. Allen don’t want to have two homebrew installations so that he allows Stan to use his homebrew.

Update 2013-05-31: considering /Library/Caches/Homebrew

Setup

  1. Create a group brew and add Stan
  2. brew doctor (Allen checks if he installed brew correctly)
  3. sudo chgrp -R brew /usr/local (Change the group of homebrew installation directory)
  4. sudo chmod -R g+w /usr/local (Allow group members to write inside this directory)
  5. sudo chgrp -R brew /Library/Caches/Homebrew (Change the group of homebrew cache directory)
  6. sudo chmod -R g+w /Library/Caches/Homebrew (Allow group members to write inside this directory)
  7. brew doctor (Stan checks if he can use homebrew)
  8. We are done!

Detailed Setup

Create a group brew and add Stan
One way to create a group brew is to open the System Preferences and select Users & Groups. Unlock this screen and press the lower left +. Select the account type Group and name it brew. After creating this group add Allen and Stan.

Allen checks if he installed brew correctly

allen$ brew doctor
Your system is raring to brew.

Change the group of homebrew installation directory

allen$ sudo chgrp -R brew /usr/local
Password:
allen$ ls -la /usr/local
total 16
drwxrwxr-x 8 root brew 272 Jun 12 22:31 .
drwxr-xr-x@ 13 root wheel 442 Jun 12 22:36 ..
-rw-r--r-- 1 admin brew 159 Jun 12 22:28 .gitignore
drwxr-xr-x 2 admin brew 68 Jun 12 22:33 Cellar
drwxr-xr-x 6 admin brew 204 Jun 12 22:28 Library
-rw-r--r-- 1 admin brew 789 Jun 12 22:28 README.md
drwxr-xr-x 3 admin brew 102 Jun 12 22:28 bin
drwxr-xr-x 3 admin brew 102 Jun 12 22:28 share

Allow group members to write inside this directory

allen$ sudo chmod -R g+w /usr/local
allen$ ls -la /usr/local
total 16
drwxrwxr-x 8 root brew 272 Jun 12 22:31 .
drwxr-xr-x@ 13 root wheel 442 Jun 12 22:36 ..
-rw-rw-r-- 1 admin brew 159 Jun 12 22:28 .gitignore
drwxrwxr-x 2 admin brew 68 Jun 12 22:33 Cellar
drwxrwxr-x 6 admin brew 204 Jun 12 22:28 Library
-rw-rw-r-- 1 admin brew 789 Jun 12 22:28 README.md
drwxrwxr-x 3 admin brew 102 Jun 12 22:28 bin
drwxrwxr-x 3 admin brew 102 Jun 12 22:28 share

Change the homebrew cache directory accordingly

sudo chgrp -R brew /Library/Caches/Homebrew
sudo chmod -R g+w /Library/Caches/Homebrew

Stan checks if he can use homebrew
In my case Allen and Stan is one person, so that a simple login do the trick.

allen$ login stan
Password:
stan$ brew doctor
Your system is raring to brew.

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Sep 10

Homebrew is my favorite package manager. If you installed Xcode just for brew than this post might be interesting for you.

Kenneth Reitz created a GCC Installer for OSX without Xcode! Thank you. This package is about 500 MB. Compared to Xcode you save at least 1,5 GB on your SSD.

So let’s go to work:

  • Remove Xcode
  • sudo /Developer/Library/uninstall-devtools --mode=all

    This will delete Xcode. For more details see John’s post

  • Download and install GCC for Mac without Xcode
  • Currently 10.6 and 10.7 packages are available at https://github.com/kennethreitz/osx-gcc-installer/downloads

  • Install brew (see http://mxcl.github.com/homebrew/)
  • /usr/bin/ruby <(curl -fsSkL raw.github.com/mxcl/homebrew/go)
  • You're done
  • You can verify your success with brew doctor.

Caution:
You don't need Xcode for formulas like gradle, groovy, maven, tomcat etc. Nevertheless some formulas will require Xcode!

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May 12

I’m looking for a way to identify if an application on my Mac stopped. I couldn’t find anything, so it was time to write my first AppleScript:

set network_connect_is_running to is_running("Network Connect")

if network_connect_is_running then
	repeat until network_connect_is_running is false
		delay 10 -- wait some seconds
		set network_connect_is_running to is_running("Network Connect")
	end repeat
	-- application stopped, so run a dummy app so that marcopolo can switch context
	tell application "NetworkConnectStopped" to activate
end if

on is_running(appName)
	tell application "System Events" to (name of processes) contains appName
end is_running

The code is quiet simple. Line 12-14 defines a function which checks if application appName is running. Line 01 calls this function and checks if the application “Network Connect” is running. The result is stored in the variable network_connect_is_running. Only if “Network Connect” is running (line 03) I want to start my listener. The listener (loop line 04-07) checks every 10 seconds if the application is still running. If not, the loop ends and I can start my trigger application “NetworkConnectStopped”.

So what is this all for?

I use MarcoPolo to switch my network connections. I use three contexts:
- home
- homeOffice (VPN)
- work
The contexts differ in things like proxy, printer, mounts.

The problem: MarcoPolo has no rule “Not Running Applications”

When I’m at home and start my VPN (Network Connect) I use this application to switch automatically to context “homeOffice”. When I finished my home office session and quit “Network Connect” I want to switch automatically to context “home” again. This can not be done with MarcoPolo so far. Now the above script comes into play. I stored this script as an application and start this listener when switching to context “homeOffice”. When I quit “Network Connect”, my listener recognizes this and starts the application “NetworkConnectStopped”. This application is created with the Automator and contains nothing but a “Pause” of 6 seconds. One more than the default MarcoPolo rule update interval. The last step is to add a rule “Running Application” to MarcoPolo which switches to context “home” when application “NetworkConnectStopped” is running.

Here are my MarcoPolo rules:

And here are my actions:

If you have suggestions or need more details feel free to comment.

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Dec 11

All of our team were to blind to recognize this feature – Pin Tab. Here is the scenario. You run your fast test suite locally. You have a couple of failed tests. You pick the first one, fix it, and run this test only to get fastest feedback. Stop. Now the results of your first run are gone, overwritten by the second run. Which other tests did fail? I can’t remember. We were looking for s.th. similar to the find dialog open in new tab. Couldn’t find it, a workaround was to copy/paste the result. Today I wanted to create a feature request. While I’m thinking about what I would expect I opened my IntelliJ IDEA and there it was: Pin Tab!

If you want to keep a result just press the pin at the left site. Now this tab is pinned. If you run another set of tests your previous result will remain. Cool. How could I overlooked it for so long?

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Nov 04

In one way or another you are using task lists, I’m sure.

A task list – as the name suggests – is a list of tasks. How does it normally works?

While you are coding your brain (and/or the brain of your pair) try to escape :) It creates thoughts like:

  • I need to test this and that as well
  • Here it might be cool to clean up the campground
  • The name of that class did not express the intention any longer, what is more suitable?
  • ..

These ideas of other tests and possible refactorings keep you from the current task. To keep focus write them down. Free your mind. If you finished your task, take the next one from the list. New ideas? Add them. Let the task list evolve. Clean up your list frequently. If you have tasks that you won’t do shortly, create user stories and sell them to your product owner.

This practice allow you to keep focus on the current task without loosing your ideas. You’ll have less context switches. It makes you more productive. Try it!

TDD Task Lists With IntelliJ IDEA

I use this Task Plugin. It is simple and easy to use. Every action can be triggered with the keyboard. Changing keyboard mappings can be done classically with IDEA’s keyboard mapping. Because of the missing Insert key on my MacBookPro I remapped Add Task. To go quickly to the Task Tool Window you can either map it to a key or use the switcher (Ctrl-Tab on OSX):

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Sep 25

Henrik Kniberg seems to had a great session with Mary Poppendieck about Social Technical Systems.

You must see this amazing presentation about What Motivates You! Great style, great content.

I wasn’t so wrong when I wrote about bonus systems.

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Feb 13

Lets say you earn 1200 gummy bears a year and get a bonus of 100 gummy bears. What would you say is your salary?

a) 1200
b) 1300

Probably you would answer a). If the bonus is paid for the extra effort and your personal engagement, i.e. something that you can control, what will be your answer? I guess still a), right? Why? Because even if you got in previous years a bonus, your manager can reject the bonus. Either in case of your under-performance – a thing that you can control or in case of a struggling company – a thing that you can’t control.

Now lets say you get several years a bonus of 100 gummy bears? What is your expectation of the next performance review? Let me guess, your answer will be 100 or more.

To sum it up: You expect the bonus each year but you do not account it into your salary. Mmh, not the best investment a company could make with that extra money.

What solution do I have? Flip the system!

Give the new developer a salary with a bonus. When you know the developer and her potential, turn it into a fix salary without a bonus.

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Mar 27

Today a peer has presented some code at the projector. The font size was to small for most of us.

screenshot1

Luckily at our company we have Intellij IDEA.

A great feature: Just press Ctrl and turn your mouse wheel towards you and… yes the font of the current file increases.

Then he switched to another file. Mmh, there was the small font again.

A rocking feature to address this issue: Ctrl + Backquote or View > Quick Switch Scheme.

Beforehand, define a second color scheme presentation (Settings > Editor > Colors & Fonts). Set a font size of e.g. 24 points.

If you held a presentation at a projector just do a Quick Switch Scheme. Press 1 (Switch Color Scheme). Next, select presentation and here we go:

screenshot2

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