To update a config file:
$ cp old.conf updated.conf $ merge -A updated.conf new.conf old.conf
Then edit updated.conf and resolve merge conflicts then deploy updated.conf.
Creating new config files with merge
Reply
How to iteratively create PhoneGap contacts
I started a new project today to load the contacts from my personal database into my iPhone.
cd ~/Documents/pcrepo/aman-importer phonegap create phonegap-test cd phonegap-test phonegap platform add ios phonegap plugin add org.apache.cordova.contacts
There is documentation for the Contacts API.
The trouble I got into was iteratively creating contacts.
Code like this doesn’t work:
for ( var i in contact_data_list ) {
var contact_data = contact_data_list[ i ];
var contact = navigator.contacts.create();
var name = new ContactName();
name.givenName = contact_data.first_name;
name.familyName = contact_data.last_name;
contact.name = name;
contact.save(
function() { alert( 'saved!' ); },
function() { alert( 'failed!' ); }
);
}
The behavior is that contact.save fails and neither of the success or failure callbacks are invoked.
The way to iterate over the input data is like this:
var index = 0;
var saver = function() {
if ( index === contact_data_list.length ) {
// we're finished enumerating the array, we can report and exit:
navigator.contacts.find( ['*'], report_contacts );
return;
}
var contact_data = contact_data_list[ index++ ];
var contact = navigator.contacts.create();
var name = new ContactName();
name.givenName = contact_data.first_name;
name.familyName = contact_data.last_name;
contact.name = name;
contact.save(
saver,
function() { alert( 'failed!' ); }
);
};
saver();
You can see it for real over here…
Installing Subversion on Mac OS X with WebDAV support (serf library)
cd ~/Development/svn-install wget http://prdownloads.sourceforge.net/scons/scons-2.3.4.tar.gz wget http://mirror.ventraip.net.au/apache/apr/apr-1.5.1.tar.gz wget http://mirror.ventraip.net.au/apache/apr/apr-util-1.5.4.tar.gz wget http://mirror.ventraip.net.au/apache/subversion/subversion-1.8.10.tar.gz tar xzf scons-2.3.4.tar.gz tar xzf apr-1.5.1.tar.gz tar xzf apr-util-1.5.4.tar.gz tar xzf subversion-1.8.10.tar.gz cd scons-2.3.4 sudo python setup.py install cd ../apr-1.5.1 ./configure --prefix=/usr/local make sudo make install cd ../apr-util-1.5.4 ./configure --with-apr=/usr/local --prefix=/usr/local make sudo make install cd ../subversion-1.8.10 sh get-deps.sh serf cd serf scons APR=/usr/local APU=/usr/local OPENSSL=/usr/local PREFIX=/usr/local sudo scons PREFIX=/usr/local install cd .. ./configure --with-openssl --with-serf=/usr/local --prefix=/usr/local make sudo make install
Nuff said!
Oh, wait… there’s a problem with misconfigured CA certificates…
cd ~/Development/svn-install wget https://distfiles.macports.org/MacPorts/MacPorts-2.3.3-10.10-Yosemite.pkg
Run the MackPorts*.pkg…
xcode-select --install
Then…
sudo /opt/local/bin/port install curl-ca-bundle
Then…
sudo -s cd /System/Library/OpenSSL/certs/ ln -s /opt/local/etc/openssl/cert.pem cert.pem cd /usr/local/etc/openssl/certs ln -s /opt/local/etc/openssl/cert.pem cert.pem
Testing:
openssl s_client -connect www.progclub.org:443 -CApath /opt/local/etc/openssl/
Using MacPorts OpenSSL:
sudo port install openssl cd ~/Development/svn-install/subversion-1.8.10/serf/ scons APR=/usr/local APU=/usr/local OPENSSL=/opt/local PREFIX=/usr/local sudo scons PREFIX=/usr/local install
Done!
Installing PHP 5.4 on Ubuntu Lucid
See
PPA for PHP 5.5.
First:
# apt-get install python-software-properties
Then:
# add-apt-repository ppa:ondrej/php5-oldstable
Then:
# apt-get update # apt-get dist-upgrade # reboot
And you’re done!
Cleaning log files before printing them to the console
If you send non-printable characters to your TTY you might corrupt it, and that’s no fun.
So before you print log files which might contain dodgy data to a console clean it by piping it through tr like this:
tr -c '\11\12\15\40-\176' '?'
Fixing CA Certificates after upgrade to Ubuntu 14.04.1
After using do-release-upgrade to upgrade Ubuntu to version 14.04.1 I started having the following problem:
root@orac:/root# wget https://www.progclub.org/robots.txt --2014-11-20 13:49:28-- https://www.progclub.org/robots.txt Resolving www.progclub.org (www.progclub.org)... 67.207.128.184 Connecting to www.progclub.org (www.progclub.org)|67.207.128.184|:443... connected. ERROR: cannot verify www.progclub.org's certificate, issued by '/C=GB/ST=Greater Manchester/L=Salford/O=COMODO CA Limited/CN=COMODO RSA Domain Validation Secure Server CA’: Self-signed certificate encountered. To connect to www.progclub.org insecurely, use `--no-check-certificate'.
To start with I did this:
root@orac:/root# cd /etc/ssl/certs root@orac:/etc/ssl/certs# mv ssl-cert-snakeoil.pem ../ root@orac:/etc/ssl/certs# cd /etc/ssl/private root@orac:/etc/ssl/private# mv ssl-cert-snakeoil.key ../
Then I got rid of the symlink(s) for the ssl-cert-snakeoil.pem, e.g.:
root@orac:/etc/ssl# cd /etc/ssl/certs root@orac:/etc/ssl/certs# ll | grep 'snake' lrwxrwxrwx 1 root root 21 Jan 10 2012 c8882f98 -> ssl-cert-snakeoil.pem lrwxrwxrwx 1 root root 21 Mar 25 2014 c8882f98.0 -> ssl-cert-snakeoil.pem root@orac:/etc/ssl/certs# mv c8882f98* ../
Then I ran: dpkg-reconfigure ca-certificates:
root@orac:/root# dpkg-reconfigure ca-certificates
On the first screen I selected ‘ask’:
┌───────────────────────────────────┤ ca-certificates configuration ├────────────────────────────────────┐ │ This package may install new CA (Certificate Authority) certificates when upgrading. You may want to │ │ check such new CA certificates and select only certificates that you trust. │ │ │ │ - yes: new CA certificates will be trusted and installed; │ │ - no : new CA certificates will not be installed by default; │ │ - ask: prompt for each new CA certificate. │ │ │ │ Trust new certificates from certificate authorities? │ │ │ │ yes │ │ no │ │ ask │ │ │ │ │ ││ │ │ └────────────────────────────────────────────────────────────────────────────────────────────────────────┘
On the next screen I unselected everything:
Package configuration
┌────────────────────────────────────┤ ca-certificates configuration ├────────────────────────────────────┐
│ This package installs common CA (Certificate Authority) certificates in /usr/share/ca-certificates. . │
│ Please select the certificate authorities you trust so that their certificates are installed into │
│ /etc/ssl/certs. They will be compiled into a single /etc/ssl/certs/ca-certificates.crt file. │
│ │
│ Certificates to activate: │
│ │
│ [ ] mozilla/ACEDICOM_Root.crt ↑ │
│ [ ] mozilla/AC_Raíz_Certicámara_S.A..crt ▮ │
│ │
│ │
│ │
│ │
└─────────────────────────────────────────────────────────────────────────────────────────────────────────┘
Then I ran: dpkg-reconfigure ca-certificates again:
root@orac:/root# dpkg-reconfigure ca-certificates
On the first screen I selected ‘ask’:
┌───────────────────────────────────┤ ca-certificates configuration ├────────────────────────────────────┐ │ This package may install new CA (Certificate Authority) certificates when upgrading. You may want to │ │ check such new CA certificates and select only certificates that you trust. │ │ │ │ - yes: new CA certificates will be trusted and installed; │ │ - no : new CA certificates will not be installed by default; │ │ - ask: prompt for each new CA certificate. │ │ │ │ Trust new certificates from certificate authorities? │ │ │ │ yes │ │ no │ │ ask │ │ │ │ │ ││ │ │ └────────────────────────────────────────────────────────────────────────────────────────────────────────┘
On the next screen I selected everything:
Package configuration
┌────────────────────────────────────┤ ca-certificates configuration ├────────────────────────────────────┐
│ This package installs common CA (Certificate Authority) certificates in /usr/share/ca-certificates. . │
│ Please select the certificate authorities you trust so that their certificates are installed into │
│ /etc/ssl/certs. They will be compiled into a single /etc/ssl/certs/ca-certificates.crt file. │
│ │
│ Certificates to activate: │
│ │
│ [*] mozilla/ACEDICOM_Root.crt ↑ │
│ [*] mozilla/AC_Raíz_Certicámara_S.A..crt ▮ │
│ │
│ │
│ │
│ │
└─────────────────────────────────────────────────────────────────────────────────────────────────────────┘
Then magically everything was working again!
root@orac:/root# wget https://www.progclub.org/robots.txt --2014-11-20 14:35:50-- https://www.progclub.org/robots.txt Resolving www.progclub.org (www.progclub.org)... 67.207.128.184 Connecting to www.progclub.org (www.progclub.org)|67.207.128.184|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 364 [text/plain] Saving to: 'robots.txt.1’ 100%[=====================================================================>] 364 --.-K/s in 0s 2014-11-20 14:35:51 (8.54 MB/s) - 'robots.txt.1’ saved [364/364]
JSON Schema
Reading about JSON Schema…
Making text upper case or lower case in NetBeans
From the help:
Ctrl-U,L: lower case Ctrl-U,U: upper case Ctrl-U,S: reverse case
The Universe and Stuff
The age of the universe is 13.798 billion years.
The size of the universe is unknown, it may be infinite.
A galaxy is a massive gravitationally bound system. There are probably more than 170 billion galaxies in the observable universe.
How to enabled MySQL federated storage engine
Found this article which said to edit /etc/mysql/my.cnf and in the [mysqld] section add ‘federated’, e.g.:
[mysqld] federated