I didn't do it!

Symfony2, PHPUnit with Guard

Sat, 23 Mar 2013 20:53:00 +1100

I came across an article on continuous testing in PHP using Guard and guard-phpunit. I gave it a go and I absolutely love it!

If you want to try it out, head over to the article above for the setup and how to run it.

You may find following notes (on Debian) helpful:

1) Make sure /var/lib/gems/1.8/bin is in your $PATH (just substitute the right path)

2) You may encounter the following error if you’re using either PHPUnit 3.7.x or older version of guard-phpunit:

Fatal error in PHPUnit 
Fatal error: Call to undefined method PHPUnit_Framework_TestResult::allCompletlyImplemented() in /var/lib/gems/1.8/gems/guard-phpunit-0.1.4/lib/guard/phpunit/formatters/PHPUnit-Progress/PHPUnit/Extensions/Progress/ResultPrinter.php on line 250

The error is caused by a misspelled method in PHPUnit. Easiest way to fix this is to modify the offending file directly to correct the spelling:

vim /var/lib/gems/1.8/gems/guard-phpunit-0.1.4/lib/guard/phpunit/formatters/PHPUnit-Progress/PHPUnit/Extensions/Progress/ResultPrinter.php

Locate the misspelled method name ‘allCompletlyImplemented()’ - mine was in two lines: 1) line:250 and 2) line:256 and correct them to ‘allCompletelyImplemented()’ and you should be able to get your phpunit to run successfully.

3) A note on the Guardfile if you are using Symfony 2

set the ‘:cli’ variable to ‘-c app/’
set the :tests_path variable to ‘src/’

4) Here’s an example Guardfile that works for me (in the root of the Symfony project):

guard 'phpunit', :tests_path => 'src/Company', :cli => '--colors -c app/' do
  watch(%r{^.+Test\.php$})
  watch(%r{^src/Company/SomeAppBundle/Entity/(.+)\.php$}) { |m| "src/Company/SomeAppBundle/Tests/Entity/#{m[1]}Test.php" }
  watch(%r{^src/Company/SomeAppBundle/Helper/(.+)\.php$}) { |m| "src/Company/SomeAppBundle/Tests/Helper/#{m[1]}Test.php" }
  watch(%r{^src/Company/SomeAppBundle/Command/(.+)\.php$}) { |m| "src/Company/SomeAppBundle/Tests/Command/#{m[1]}Test.php" }
end

The above will cause all unit test trigger when any *Test.php files changes and any modified *.php files from Entity, Helper and Command folder to trigger its own corresponding test files.

Have fun!

Ad-hoc keymapping in Vim II

Sat, 23 Mar 2013 00:45:50 +1100

This is a follow up on my earlier post Ad-hoc keymapping in Vim where I map ‘,s’ to first save the file that I am editing and then executes the specified file.

Wouldn’t it be better if it saves and execute any file that is currently in the active window? You can do it with %.

In Vim, the % sign is a variable containing the full path to the file currently active your window.

So intead of:

:map ,s :w\|!php filename.php<cr>

You can do:

:map ,s :w\|!php %<cr>

So, doesn’t matter which file you’re editing at any given time, hitting ‘,s’ will save and then execute it.

Out of sync

Tue, 19 Mar 2013 07:08:00 +1100

If your Linux, for some unknown reason ran out of sync by days, and you need a quick solution, use ntpdate:

First stop ntp:

[me@localhost ~] /etc/init.d/ntp stop

Then update time with a server using ntpdate:

[me@localhost ~] ntpdate ntp.ubuntu.com
18 Mar 17:23:16 ntpdate[20660]: step time server 91.189.94.4 offset
269404.459039 sec

Then start ntp again:

[me@localhost ~] /etc/init.d/ntp start

Done.

CentOS 6.x Minimal Network Issue

Sat, 21 Jul 2012 20:15:35 +1000

Just realised that CentOS 6.x minimal setup is so minimal that you have no networking to boot? The fix is very easy (assuming you’re just wanting to DHCP it).

Step 1

dhclient eth0

Step 2

vi /etc/sysconfig/network-scripts/ifcfg-eth0

Change the line

ONBOOT="no"

ONBOOT="yes"

Hang on.. what? Still not getting an address after rebooting? Try editing the same file as above:

vi /etc/sysconfig/network-scripts/ifcfg-eth0

Add the following:

BOOTPROTO="dhcp"

This will make it automatically ping DHCP server for an IP.

Jot it down

Mon, 18 Jun 2012 12:01:41 +1000

For testing purposes, I usually create a series of files to run my bash scripts against and I love using the jot command.

jot 3

Generates:

1
2
3

Awesome! This allows me to:

jot 8 | xargs touch

I also use it to generate random series of numbers:

jot -r 10

What if you want to specify a range of numbers to which the randomisation occur?

jot -r 10 580 900

The above gives you 10 random numbers between 580 to 900. Awesome, right? Then there’s more - you can prepend a word to it!

jot -w file_%d -r 10 580 900

Like I said, I love the jot command. There’s a lot more use of this nifty little command. I only cover those I use often.

For the rest of it, you can go through the tutorial here.

Oh yes!

Sun, 17 Jun 2012 11:57:00 +1000

Ever come across a situation where you need to do this (very quickly):

rm -rf *

And you get this (with the -i flag):

rm: remove regular file 'PRON_0001.jpg'?

Sh*t! I have to hit 'y' to every single file? Well, you can use the yes command.

The yes command generates an infinite loop of 'y'. So, your problem solved:

yes | rm -rf *

Of course the above example uses the rm command, which can be solved with the -f flag but you can use it for any other commands that doesn’t offer such an option.

Mac OS command line goodies

Wed, 13 Jun 2012 11:53:57 +1000

I always love doing things without my fingers leaving the keyboard. So, the more I can do from my terminal, the better. Over the years, I’ve come to like quite a few really handy commands.

Open files

Open most files as if you double clicked on it in Finder:

open usage_report.pdf

Wanna open Finder where you are in terminal?

open .

Emailing

Emailing output to yourself (you need to enable postfix first):

ps aux | mail -s "Subject line" me@example.com

You should be able to check if the email has been placed in queue:

mailq

You should see something like this if you’re quick (before it gets sent):

-Queue ID- --Size-- ----Arrival Time---- -Sender/Recipient-------
6762CA18F19*   20039 Sat Jun  9 20:12:03  root@macbookpro.local
                                         me@example.com

-- 19 Kbytes in 1 Request.

Oh this works on any Linux with mailx and local mta installed.

Clipboard manipulation

How about copying something in terminal to clipboard?

cat some_text.txt | pbcopy

You can then use Ctrl+V anywhere. And if you want to past from clipboard:

pbpaste > from_clipboard.txt

Other misc tools

Current Mac version:

sw_vers

Profiler information:

systerm_profiler

Use the Spotlight engine:

mdfind textedit

Screencapture (full tutorial here):

screencapture ~/Desktop/mycapture.jpg

That’s it! Now go have fun!

What are your names?

Tue, 12 Jun 2012 12:03:28 +1000

Wanna quickly rename files right there and then? I discovered this awesome tool rename. You have the following:

IMG_001.jpg
IMG_002.jpg
...
IMG_113.jpg

You want to rename the following to paris_2012_XXX.jpg:

rename 's/IMG/paris_2012/g' *.jpg

Boom! Done!

Mass revert in SVN

Mon, 11 Jun 2012 11:59:00 +1000

Ever experience merging something in SVN just to realise that merged the wrong branch or things don’t work? In few cases, you may want to revert all the changes.

So let’s start with this:

svn st

You get a list of files. But you only want those that has ‘M’ status. So, let’s to filter that using grep:

svn st | grep '^M'

Good. Now that I have only the ones that are modified, all I need is get the filename.

svn st | grep '^M' | awk '{print $2}'

This will actually list only the filename part. The ‘$2’ means print only column 2. And finally, we run svn revert on each of the filenames returned:

svn st | grep '^M' | awk '{print $2}' | xargs svn revert

Of course, this means you can now do specific things like removing newly added files, conflicted files, etc.

Bash be nimble...

Sun, 10 Jun 2012 11:57:59 +1000

If you use terminal a lot you should know a few really useful keybindings (generally works with bash and zshell). Here’s what I use often:

Ctrl+L: Clear your terminal
Ctrl+K: Delete from cursor to end
Ctrl+K: Delete from start to cursor
Ctrl+E: Move to the end of line
Ctrl+A: Move to the end of line
Alt+F: Move a word forward
Alt+B: Move a word backward
Ctrl+R: Reverse history search
Ctrl+W: Delete backward a word

There’s quite a few more. So, you may wanna hunt around for more but these are just a few that I personally remember and use on a daily basis.

Reload!

Sat, 09 Jun 2012 11:51:47 +1000

I notice quite often terminal users don’t know how to reload their rc files - bashrc, zshrc, etc. There are two ways:

. ~/.bashrc

source ~/.bashrc

Grep basics in 25 seconds

Fri, 08 Jun 2012 11:57:25 +1000

Well, not exactly 25 seconds, but I thought that would make a great title. I find I always have to introduce new junior devs to the world of grep and I think the following will get anyone started very quickly.

If you’re searching for a specific term or keywords within a million files, use this:

grep -ir pattern /path/to/search/

The -i switch stands for case insensitive and r is for recursive.

Another good search, especially within source code is:

grep -rn 'pattern' /path/to/search

This adds the line number to output so you can easily see where a variable or function is used.

If you ever need to search amongst a million files, with thousands of different extensions, but you’re only interested in specific file type, then you can try something like this:

find . -type f -name "*.php" | xargs grep -i pattern

That’ll give you very specific searches. The above, as an example, search only actual files that ends with ‘.php’.

If the tree you’re searching contains whitespace in the paths names you can use find … -print0 and xargs -0:

find . -type f -name "*.php" -print0 | xargs -0 grep -i pattern

To search multiple keywords use this:

find . -xdev -type f -name "*.php" | xargs grep -iHE "keyword1|keyword2"

Have fun!

Finding & bashing stuff

Thu, 07 Jun 2012 11:53:42 +1000

We often use the find command to look for specific files like so:

 find . -type f -name '*.rb'

What if you want to do something with the result? With the find command, you can’t pipe the result because it is not a shell and it can’t spawn one.

Luckily find has a -exec function, so that you can do the following:

find . -type f -name '*.txt' -exec bash -c 'cat {}' \;

Note the \; at the end - that’s important if you’re executing the bash shell as it indicates the end of the line.

ifconfig.me

Wed, 06 Jun 2012 20:16:00 +1000

Awesome little site. Allows you to do this from any servers at command line:

curl ifconfig.me

It returns your external IP address!

Cheap SSH key tricks

Wed, 06 Jun 2012 11:57:00 +1000

Of course, most will know how to generate new SSH keys for passwordless entry like so:

ssh-keygen -t rsa

But I always want to add the key to the remote server first and then ssh in. So, I do this:

cat ~/.ssh/id_rsa.pub | ssh root@server.me "cat >> ~/.ssh/authorized_keys"

Ad-hoc keymapping in Vim

Tue, 05 Jun 2012 23:38:00 +1000

Ever since I saw a screencast by Gary Bernhardt from Destroy All Software, I’ve been using his awesomely handy key mapping trick in vim while writing scripts.

If you’re like me, you’ll spend most of your time writing small shell/bash scripts. I typically would write/edit my script, save my work, switch to another pane in iTerm2, test the script, back to my editing pane, edit, save, switch pane, test… repeat.

How about just create an ad-hoc mapping to do both saving and execution of the script all in one go?

In vim

:map ,s :w\|!./script_name.sh<cr>

That’s it.

Now, every time you’re done editing, hit ‘,s’ and you’ll save and execute the script, all in one go.

Perl Search & Replace One-Liner

Tue, 05 Jun 2012 22:50:00 +1000

Yes, it’s been used for a long long time and I have been using them for quite a while too. But the problem is, I always forget which one to leave out for a dry run.

For search and replace applied to files specified:

me@mycomp:~$ perl -pi -e ‘s/search/replace/g’ *.html

For non-applied search and replace (without the i argument):

me@mycomp:~$ perl -p -e ‘s/search/replace/g’ something.html

The way I try to use now to remember which one to exclude is this: -pi means print into as in print into the file(s) searched and p means print only [to screen].

Have fun!