Mac

Category Archive Mac

Installing a PhoneGap App On an iOS Device Using iTunes

Preliminary Steps

To produce an iOS build using the PhoneGap Build web site, one must have created a signing certificate and provisioning list for the devices that the app is allowed to run on. These notes assume that this has been done, and there is a successful build on the PhoneGap Build web site.

Loading into iTunes

The first step, and the first potential roadblock, is loading the app into iTunes.

  1. Plug in the iOS device into the computer and select the device.
  2. Download the .ipa file from the PhoneGap Build site.
  3. Drag and drop the .ipa file onto iTune.

This is where the first “gotcha” may turn up. The .ipa file does not have Apple’s blessing. By default OS X will refuse to load any un-blessed apps.

skitch

This can, however be changed in the Security preferences.

skitch

Use the lock symbol to allow for changes to the security settings, then choose “Anywhere” in the “Allow apps downloaded from:” section.

skitch

OS X will give a final warning about the dangers of doing this, and that the setting will revert to after a certain amount of time.

skitch

 

Now the app should show up in the list of apps to load onto the iOS device, and will be loaded when you sync the device.

Hydration Hanging

Hydration is a wonderful development tool that will automatically fetch the latest version of the app from the PhoneGap Build web site. (It must be removed before submitting the app to Apple for review.) However, when one starts the app,  it will sometimes hang.

To kill the hung app, the Apple support web site has an excellent tip.

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Re-enabling Repeating Keys In Yosemite

When programming, I and millions like me like to keep my hands on the keyboard and minimize the number of times that I have to spend time going through the process of lifting my hand off the keyboard to reach for the mouse, do something with the mouse, and return the hand to the keyboard. Being able to perform all editing functions from the keyboard is very efficient.

Thus, if an environment supports something like vim emulation, I’m all over it.

After upgrading to Yosemite I found that navigating in my JetBrains IDEs vim was dead. Even though key repeating is set in the keyboard preferences, keys won’t repeat. Worse, letters that can take accents pop up a menu that then expects me to choose and accent, e.g.

PressAndHold_and_Add_New_Post_‹_James_Reuben_Knowles_—_WordPress

Press and Hold Popup Menu

I recognize this as behaviour derived from iOS devices, and can sympathize with non-programmers scratching their head asking, “Why would anybody want keys to repeat? There are no words that contain kkkkkkkkkkkkkkkkkkkkk.” But, they are not programmers using keyboard navigation.

To disable this behaviour, enter the following command in a terminal.

[bash]
defaults write -g ApplePressAndHoldEnabled -bool false
[/bash]

You’ll need to restart your programs to pick up this new default behaviour, however.

Apparently this new behaviour appeared in Lion, but with Yosemite is seems to be a default forced on everybody.

Maximize a Window in OS X 10.10 (Yosemite)

One of the changes in Yosemite is that the green maximize button on windows no longer maximizes, but puts the window into full screen mode. For how I work, this is a productivity killer. I don’t see any setting to revert this behaviour. However there is a workaround.

Hold down the Option key when clicking on a window’s green button to maximize. This will take a little time to build a new habit.

Update

Apparently one can also double-click the window’s title bar, which I’m quite happy to see.

 

 

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Getting MySQL Working After OX 10.10 Yosemite Upgrade

I updated my development computer to OS X 10.10 (Yosemite) and found MySQL was dead. These are notes on what I did to get MySQL running again.

Update the latest MySQL off of their website. At the time of this writing, that is Mac OS X 10.9 (x86, 64-bit), DMG Archive from the MySQL download site.

I found that MySQL would run but MySQL Workbench couldn’t connect. It turns out that the data directory is kept under each version. Thus, when I updated from 5.6.17 to 5.6.21 MySQL was pointing to a fresh new database.

The new version is installed in /usr/local/mysql-5.6.21-osx10 algo similar al viagra.8-x86_64, with the MySQL data files in the data subdirectory. I renamed the data subdirectory to ensure I have a backup and made a copy of the old directory.

sudo cp -rp ../mysql-5.6.17-osx10.7-x86_64/data .

It appears that MySQL is working fine now. Note that this will only work for incremental revisions. If you’re reaching across minor version numbers (such as 5.5 to 5.6), the changes in structure will probably not work. (You did make a backup of the original data directory, didn’t you?)

 

 

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Python 2.7, Django, and MySQL on OS X

For some reason, getting Python and MySQL talking on OS X has been an annoyance. These are my notes for getting the two to talk to each other in a Python 2.7 virtual environment for a Django project.

The Django 1.6 docs recommend using the MySQLdb package. Its installation uses the mysql_config executable.

I have the following set up:

  1. MySQL 5.6.16
  2. Python 2.7.3
  3. PyCharm 3.1.1, which was used to create
  4. a Python virtual environment with pip located in $HOME/upharm27

[code]
$ locate mysql_config

/usr/local/mysql-5.6.16-osx10.7-x86_64/bin/mysql_config

$ export PATH=$PATH:/usr/local/mysql-5.6.16-osx10.7-x86_64/bin
$ ~/upharm27/bin/pip install mysql-python
[/code]

I have gcc 4.7.2 available, but curiously, the installer gave the following message:

[code]
Installing collected packages: mysql-python
Running setup.py install for mysql-python
gcc-4.2 not found, using clang instead
[/code]

The install succeeded using clang, so it’s nothing more than a curiosity at this point.

I was able to verify that the package was installed with:

[code]
$ ~/upharm27/bin/python
Python 2.7.3 (v2.7.3:70274d53c1dd, Apr  9 2012, 20:52:43)
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import MySQLdb
>>>
[/code]

 

Update

I just followed these notes using the latest XCode 5.1 on OS X 10.9 and the mysql-python install failed. Apparently the clang Apple ships produces errors on unknown flags by default. I was able do get around this by:

[code]
$ export CFLAGS=-Qunused-arguments
$ export CPPFLAGS=-Qunused-arguments
$ ~/upharm27/bin/pip install mysql-python
[/code]

Thanks to the good folks at StackOverflow. More details may be found here.

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How to Install gcc 4.7 on Mac OS X

XCode installs gcc 4.2 which has some bugs that prevent me from running skeinforge. This is how I installed gcc 4.7.

First install MacPorts. Then use the port command to install and activate the new gcc.

[code language=”bash”]
sudo port install gcc47
sudo port select gcc mp-gcc47
hash gcc
[/code]

To make the previous gcc active, use

[code language=”bash”]
sudo port select gcc none
hash gcc
[/code]

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Installing gitolite on a Mac

I’ve come to love gitolite for hosting private git repositories. It’s very easy to administer and trouble-free.

On one project, I needed to share a very large git repository between two virtual machines. I didn’t want the overhead of using a private git repository out on the Internet, just something local, like my workstation that runs OS X.

I used the System Preferences to create an account named git, and followed the gitolite install instructions.

I ran into a couple of problems that were easily resolved.

Path for Installer

First, to address gitolite complaining about not being able to find itself, I created a .bash_profile with the following:

[bash light=”true”]
export PATH=/Users/git/bin:$PATH
[/bash]

Now I could run the gitolite install cleanly. I would recommend doing this first thing after creating the git account to host gitolite.

Help gitolite Find git

I installed git from the link on the front page of the git web site. This installs git in /usr/local/git/bin, which gitolite doesn’t like out of the box. The fix is easy. When gitolite installs, it brings up the config file (~/.gitolite.rc) in an editor for you to tweak.

Find the line

[bash light=”true”]
$GIT_PATH=””;
[/bash]

and change it to

[bash light=”true”]
$GIT_PATH=”/usr/local/git/bin”;
[/bash]

This will prevent error messages such as

[bash light=”true”]
$ ssh git@localhost
PTY allocation request failed on channel 0
Can’t exec “git”: No such file or directory at /Users/git/bin/gitolite.pm line 562.
Use of uninitialized value $git_version in substitution (s///) at /Users/git/bin/gitolite.pm line 563.
hello Yourkey, this is gitolite v2.2-4-the gitolite config gives you the following access:
Use of uninitialized value $git_version in concatenation (.) or string at /Users/git/bin/gitolite.pm line 564.
R W gitolite-admin
@R_ @W_ testing
Connection to localhost closed.
[/bash]

from appearing and preventing gitolite from working.

Update 1 September 2013

These instructions seem to still work with gitolite 3, with additional commentary:

If you ssh into your OS X machine, you might see the message:

[bash light=”true”]
$ ssh git@localhost
PTY allocation request failed on channel 0
[/bash]

gitolite is still working. There is simply a collision between ssh versions. You an get a list of the repositories you’re allowed to access by one of these two commands:

[bash light=”true”]
$ ssh -T git@localhost
$ ssh git@localhost info
[/bash]

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Resetting the iPhone

I had a bit of a worry this morning, as my iPhone suddenly shut down and was unresponsive, as if the battery were completely dead.

I was able to force a reset using the instructions on the Apple web site Frozen or Unresponsive iPhone.

The gist is to hold down both the power button and the home button until the Apple logo appears and disappears. This can take 15–20 seconds or so.

 

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OS X, Apache, Tomcat, and mod_jk

I spent some time with a colleague from South Africa yesterday. He’s a long-time Windows user that writes in Java. He has a new MacBook Pro, and we scratched our head why Apache+mod_jk+Tomcat was blowing up on him.

JAVA_HOME

The first thing we had to get right was the JAVA_HOME variable. If it’s not set right when compiling mod_jk, you’re out of luck. On OS X there is a program that spits out the right value. We put the following in his ~/.profile. Please note the back ticks (accents graves) to run the java_home program.

export JAVA_HOME=`/usr/libexec/java_home`

mod_jk

With $JAVA_HOME set correctly, compiling mod_jk was straightforward. Download the mod_mod_jk tarball, unpack it, and change directories to the native subdirectory. The following should work cleanly.

$ ./configure --with-apxs=/usr/sbin/apxs
$ make clean ; make
$ sudo make install

Apache Configuration File

Be aware that OS X Lion has some lines (commented out) for support for mod_jk. Be sure to uncomment those lines. Previous versions of OS X don’t have these lines, so you’ll just add the load module directive and Jk* commands in the usual places.

That’s it, really. Once JAVA_HOME and the Apache configuration file were straightened out, things worked.

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How to Reveal Hidden Files and Folders in a Mac OS X File Dialog

I downloaded a development tool to give it a trial run today. It reported that git support was disabled because it wasn’t on the path. I thought this odd since it works in Terminal. It turns out that the UI uses a different PATH than Terminal. That’s a topic for a different article.

The path to git is /usr/local/git/bin/git, but this cannot be selected in a file open dialog since /usr (along with other system directories) is hidden. 99.9% of the time this is no problem. Anybody who needs to dig into those directories will drop to the command line instinctively. However, this tool offered no place to type in a path. Only the file open dialog was available.

It turns out that there is an undocumented (or poorly documented) key combination to show and hide hidden folders and files. Press Command-Shift-Period (⌘⇧.) to toggle hidden files and folders on and off.

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