I like Vim because it’s very fast. Unfortunately the other day I found myself opening a diff file that took forever to load. The file had 58187 (this number will be important later on) lines in it but I never thought Vim would choke with something that was less than 2M size.
If you find yourself in a similar situation this is what you can do in order to find out what is causing Vim to slow down.
Open Vim and start profiling:profile start /tmp/profile.log :profile func * :profile file * This is telling Vim to save the results of the profile into/tmp/profile.log and to run the profile for every file and function.Note: The profile.log file only gets generated until you close Vim.
Do the action that is taking a long time to run (in my case opening the diff file):edit /tmp/file.diff :profile pause :q!
Analyze the dataThere is a lot of information in /tmp/profile.log but you can start by focusing on the Total time. In my case there was a clear offender with a total time of more than 14 seconds! And it looked like this:FUNCTION <SNR>24_PreviewColorInLine() Called 58187 times Total time: 14.430544 Self time: 2.961442 Remember the number of lines in the file I mentioned before? For me it was interesting to see that the function gets called just as many times.
Pinpoint the offenderFinding out where a function is defined is very easy thanks to the <SNR> tag and the number right after it. You simply need to run :scriptnames and scroll until you find the index number you are looking for, in my case 24.24: ~/.vim/bundle/colorizer/autoload/colorizer.vim
I opened up a GitHub issue to make the developers of the plugin aware but it seems as if the project has been left unmaintained so I decided to remove it from my vimrc file.
Last week I had the chance to participate in my first Hackweek. I never had such an experience in any other company I’ve ever worked for and between my colleagues’ reports about previous experiences and my own expectations I was very excited to see what was all the fuzz about.
These type of events are not unique to SUSE, as a matter of fact Twitter and a bunch of other companies were also having their Hackweeks at the same time and I’m glad this is the case because after having the chance to participate in one I realize it’s a great way to promote creativity.
A hackweek is basically a week were you get to work on anything you want to work on. You are not expected to deliver anything but instead encouraged to experiment and explore with anything you think is worth spending time on.
In order to make the most out of Hackweek I decided to join a project and not start one of my own so I could do some pairing. This kind of interactions always make it a lot of fun for me plus I get to learn a ton. That’s how I joined Cornelius Schumacher to work on Yes Ship It! This is a project he had already started on his own so we were not doing everything from scratch.
The approach of yes_ship_it is different from the typical release script. It doesn’t define a series of steps which are executed to make a release. It defines a sequence of assertions about the release, which then are checked and enforced.
The first thing we decided to do together was a Rails App which allows you to track successful software releases. Since it was going to be 100% related to Yes Ship It! we decided to call it Yes It Shipped!. Let me show you how trivial it is to add it to a project like the formstack-api gem.
Install the yes_ship_it gem
$ gem install yes_ship_it
Add a yes_ship_it.conf file
$ yes_ship_it init
Release!
$ yes_ship_it
By default yes_ship_it will check if:
you are in the right release branch (by default master) and the code was pushed.
the working directory is not missing to commit anything.
the version was update
the changelog was updated
a tag was added and published
a new version of the gem was built and published
The aim is to make it as generic as possible so you can adapt it to anyproject you have. For starters you can remmove any check in the process and soon enough you will be able to add checks of your own.
What I like the most about it is that I can run yes_ship_it at any time. I don’t need to remember or make sure what was the last step I did because that’s exactly what it will do for me.
What do you think? Leave your comments below and remember to release early and release often!
Linode is one of my favorite VPS providers out there. One of the reasons why I like them is because they make it extremely easy to run openSUSE. This post is a quick tutorial on how to get you started.
The first time you log in you will be presented with the different Linode plans. And the Location where your server will reside.
I’ll choose the smallest plan
Once you see your Linode listed, click on it’s name
Now click on “Deploy an image”
In there we will select openSUSE 13.2, the amount of space in disk. You can leave the defaults which will choose for the full disk size with a 256MB swap partition. Choose your password and click Deploy.
This will take a bit but as soon as it’s done you will be able to Boot your machine.
Finally click on the “Remote Access” tab so you can see different options to log into your machine.
I personally like to ssh in from my favorite terminal app
ssh root@10.0.0.10
You will be welcomed by openSUSE with the following message:
Have a lot of fun...
linux:~ #
Now you can play with your new openSUSE 13.2 box. Enjoy!
More and more companies are requiring developers to understand Continuous Integration and Continuous Delivery but starting to implement it in your projects can be a bit overwhelming. Start with a simple website and soon enough you will feel more confident to do with more complex projects.
THE RIGHT MINDSET
TDD/BDD, CI/CD, XP, Agile, Scrum …. Ahhhhh, leave me alone I just want to code!
Yes, all this methodologies can be a bit complicated at first, but simply because you are not used to them. Like a muscle you need to train them and the more you do so, the sooner you won’t feel like doing them is a total waste of time.
Once you have made up your mind that CD is for you, your team or your project then you will need to define a process and follow it. Don’t make it easy to break the process and before you know it you and your team will feel like fish in the water.
AUTOMATE A SIMPLE WEBSITE DEPLOYMENT
There are many ways you can solve this problem. I will use a certain stack. If you don’t have experience with any of the tools, try to implement it with one you do have experience with.
Stack
Tool/Service
Alternatives
VPS
DigitalOcean
Linode or Vagrant
Configuration Management
Ansible
Chef or Puppet
Static site generator
Middleman
Jekyll or pure HTML
CI/CD Server
Semaphore
Codeship or Jenkins
The first thing is to create a new droplet in DO (you could also do this with Ansible but we won’t at this tutorial). Make sure there is a deployuser and to set up ssh keys for it (again something we could do with Ansible but we’ll leave that for another post) Setup your your domain to point to the new server’s IP address, I will use ‘example.com’.
ANSIBLE
Create a folder for your playbook and inside of it start with a file calledansible.cfg. There we will override the default configuration by pointing to a new inventory inside your playbook’s folder and specify the deploy user.
[defaults]
hostfile=inventory
remote_user=deploy
Now in our inventory file we specify a group called web and include our domain.
In it we make reference to a template called templates/nginx.conf.j2 where we will specify a simple virtual host.
server {
listen *:80;
root /srv/www/example.com;
index index.html index.htm;
server_name example.com;
location / {
try_files $uri $uri/ =404;
}
}
I’ll show you in another post how to do this same setup but with multiple virtual hosts in case you run multiple sites.
Run it by calling:
ansible-playbook simple-webserver.yml
MIDDLEMAN
Middleman has a very simple way to deploy over rsync. Just make sure you have the following gem in your Gemfile
gem 'middleman-deploy'
And then add something like this to your config.rb
activate :deploy do |deploy|
deploy.method = :rsync
deploy.host = 'example.com'
deploy.path = '/srv/www/example.com'
deploy.user = 'deploy'
end
Before you can deploy you need to remember to build your site. This is prone to errors so instead we will add a rake task in our Rakefile to do this for us.
desc 'Build site'
task :build do
`middleman build`
end
desc 'Deploy site'
task :deploy do
`middleman deploy`
end
desc 'Build and deploy site'
task :build_deploy => [:build, :deploy] do
end
GIT FLOW
Technically you don’t really need git flow for this process but I do believe having a proper branching model is key to a successful CD environment. Depending on your team’s process you might want to use something else but if you don’t have anything defined please take a look at git flow, it might be just what you need.
For this tutorial I will oversimplify the process and just use the develop, master and release branches by following these three steps:
Commit all the desired changes into the develop branch
Create a release and add the release’s information
Merge the release into master
Let’s go through the steps in the command line. We start by adding the new features and committing them.
This would be a good time to test everything out. Bump the version number of your software (in my case 1.0.0), update the change log and do any last minute fixes.
Commit the changes and let’s wrap up this step by finishing our release.
git flow release finish '1.0.0'
Try to write something significant for your message tag so you can easily refer to a version later on by it’s description.
git tag -n
Hold your horses and don’t push your changes just yet.
SEMAPHORE
Add a new project from Github or Bitbucket.
For the build you might want to have something along the lines of:
Now go into the projects settings inside the Deployment tab and add a server.
Because we are using a generic option Sempahore will need access to our server. Generate an SSH key and paste the private in Semaphore and the public in your server.
For the deploy commands you need to have something like this:
One of the mayor reasons why I still use my Windows box is because I havent found a subtitute for TOAD. I know I could make it work some how using wine but I just didn’t feel like it. Since Oracle is so Linux supportive I looked for something on their website and for my surprise I found SQLdeveloper. So far, so good! I like it and I am going to start using it for work. Here are the steps I followed to make it work in my Ubuntu 9.04 box:
