Open Sauce

ido-mode and virtual buffers

2011-10-12T10:33:00.001-07:00

Every now and again you come across something in Emacs and slap your forehead and say "why didn't I notice that before". ido-mode is one, but the setting ido-use-virtual-buffers really makes it. The concept is simple : ido-mode remembers all your past buffers so all you need to do is "C-x b" (ido-switch-buffer) and start to type the filename and ido will complete to it having remembered it from previous sessions. No need to use C-x C-f and possibly the ido find facility any more - just type the mainpart of the filename or part of it. Incredible cool time saver and very very useful.

From the Manual

ido-use-virtual-buffers is a variable defined in `ido.el'.
Its value is t
Original value was nil

Documentation:
If non-nil, refer to past buffers as well as existing ones.
Essentially it works as follows: Say you are visiting a file and
the buffer gets cleaned up by mignight.el. Later, you want to
switch to that buffer, but find it's no longer open. With
virtual buffers enabled, the buffer name stays in the buffer
list (using the `ido-virtual' face, and always at the end), and if
you select it, it opens the file back up again. This allows you
to think less about whether recently opened files are still open
or not. Most of the time you can quit Emacs, restart, and then
switch to a file buffer that was previously open as if it still
were.
This feature relies upon the `recentf' package, which will be
enabled if this variable is configured to a non-nil value.

my ido settings are currently:-

'(ido-create-new-buffer (quote never))
'(ido-enable-flex-matching t)
'(ido-enable-last-directory-history nil)
'(ido-enable-regexp nil)
'(ido-max-directory-size 300000)
'(ido-max-file-prompt-width 0.1)
'(ido-use-filename-at-point (quote guess))
'(ido-use-url-at-point t)
'(ido-use-virtual-buffers t)

Javascript utilities

2011-10-05T10:31:00.000-07:00

Playing with javascript lately I came across a super utility called jshint : and Dale Harvey has produced a super jshint-mode! For a javascript nOOb like me it's invaluable when combined with jslint (jshint can replace it, but you might like to turn it off at times then manually invoke jslint instead).

See : jshint and Javascript Lint

My javascript set up:-

(require 'js-beautify)

(add-to-list 'load-path "~/.emacs.d/jquery-doc")
(require 'jquery-doc)
(add-hook 'js2-mode-hook 'jquery-doc-setup)
(require 'flymake-jshint)
(add-hook 'js2-mode-hook
(lambda () (flymake-mode t)))

(add-to-list 'auto-mode-alist '("\\.js$" . js2-mode))

;; (add-to-list 'auto-mode-alist '("\\.js$" . js2-mode))
(add-hook 'js2-mode-hook '(lambda () (js-beautify)(define-key js2-mode-map (kbd "M-t") (lambda()(interactive)(js-beautify)))(define-key js2-mode-map [(shift f10)] (lambda()(interactive)(jslint-thisfile)))))

;; javascript lint
(defun jslint-thisfile ()
(interactive)
(compile (format "jsl -process %s" (buffer-file-name))))
(defun jslint-thisfile-test ()
(interactive)
(compile (format "jsl -process %s" (buffer-file-name))))

(provide 'rgr-javascript)

Booting Debian without X/GDM

2011-09-21T09:45:00.000-07:00

Simply remove the startup links for the display manager. e.g I used gdm3 :

sudo update-rc.d -f gdm3 remove

Reboot and voila, my little Thinkpad is running as an exim4 MTA, mysql rdbms, apache virtual hosting server and general lan gateway but with an extra few hundred megs of RAM as we haven't loaded the extremely heavy X........

bash script to symbolically link using find results

2011-08-24T11:08:00.001-07:00

#!/bin/bash
find /var/www/webs -name 'vhost' -exec bash -c 'IFS=/ read -a names <<< "$1"; ln -sf "$1" "${names[4]}"' -- {} \;

Backup all mysql databases for project infrastructure

2011-08-14T04:34:00.000-07:00

Frequently I need to back up all the databases on the server and restore locally on the development machine for testing/backup. These scripts (on the bash $PATH) do just that. Sorry about the indentation but I dont have the inclination to fight with bloggers defaults today....

(1) backup-web-databases

#!/bin/bash
for dir in "${1:-$HOME/webs}"/*/
do
if [[ $(basename "$dir") != "template" ]]
then
cd ${dir}
if [ -e "db" ]
then
echo "Backing up database in ${dir}"
backup-database
fi
fi
done
cd ~/webs

(2) backup-database : this parses an authinfo file in the format "user password dbinstance host"

#!/bin/bash
[ -a db/backups ] || mkdir db/backups
read -r uid pwd dbname rest < <(head -1 db/authinfo)
mysqldump --skip-lock-tables -u${uid} -p${pwd} --database ${dbname} > db/backups/db-backup.sql

(3) restore-web-databases

#!/bin/bash
cd ~/webs
for dir in "${1:-$HOME/webs}"/*/
do
if [ "$(basename "$dir")" != "template" ]
then
cd ${dir}
if [ -e "db" ]
then
restore-database
fi
fi
done

(4) restore-database

#!/bin/bash
[ -a db/backups ] || mkdir db/backups
read -r uid pwd dbname rest < <(head -1 db/authinfo)
if [ -e "db/backups/db-backup.sql" ]
then
echo "Restoring DB for `pwd`"
mysql -u ${uid} -p${pwd} < db/backups/db-backup.sql
else
echo "No DB back found in `pwd`"
fi

modifications to up scripts for vpn

2011-07-07T03:49:00.001-07:00

http://www.linuxselfhelp.com/howtos/PPP/PPP-HOWTO-23.html
In the scripts in etc/ppp/ip-up.d you can use

When the ppp link comes up, this script is called with the following
parameters
      $1      the interface name used by pppd (e.g. ppp3)
      $2      the tty device name
      $3      the tty device speed
      $4      the local IP address for the interface
      $5      the remote IP address
      $6      the parameter specified by the 'ipparam' option to pppd

Silly I missed that.

Open Sauce

ido-mode and virtual buffers

Javascript utilities

Booting Debian without X/GDM

bash script to symbolically link using find results

Backup all mysql databases for project infrastructure

modifications to up scripts for vpn

Bash script to sync a number of machines from the current one

script to return ip address of an interface

Going Anonymous - the Linux way : iPlayer, VPNs and PPTP

Go anonymous and back again ...

Script to add remove uk proxy routes

peer provider for vpn

Freenode and the Trends for LitteMan Power Abuse.

enabling gtags auto tag completion in Global compatible modes

Google Translate on an xmonad toggle

Exim4 handling redirecting mails from your apache vhost an external email

The Problem

The components

The solution

FB/OG Tags Now Supported (multilingual too)

OpenGraph Goodness

Greyscale and squared up for navigation

I love Gimp ...

Emacs at work developing facebook friendly meta data in php....

Copy named files to remote host and recreate directories

org-googlecl - blogging to blogger.com through org-mode

Emacs to edit a Chromium textarea

xmonad.hs : Haskell XMonad config file.

rsync and retain root/other_user attributes

Securing your private email credentials using Gnus and EPA/EPG

Using rsync to synchronise different machines over ssh

Installed the Liquorix kernel on my Asus 1015 PEM

Iconify all discrete settings types

Can now hide edit dialog properly using jscript. Also can duplicate events.

Added javascript toggle for the edit/create even dialog.

Settings can be visible.

Protect settings and meta from deletion

Meta data and general settings unified into internationalised event UI

Using xmonad to control Yoono as a scratchpad

Edit and Create Event dialog now using dynamic CSS for layout

Enabling/Disabling events for Social Network sharing.

Events can now be uniquely idendified in order to facilitate meta information for social network sharing.

Share your sites and events

Temporary placeholder pages for barwebs.com

New And Edit Event Dialogs Rejigged

Webs now using mssqli and simplified css layout

Moved from mysql functions mysqli class.

Steve Fairway site now released.

db update scripts

Finally completed internationalising simple web support structure

Css Drop Downs Supporting Direct Event Editing

Drop down menus live from mySQL using CSS

Finally : a good pop up translator for FireFox

Google Sitemap Generator

Emacs 23, the emacs daemon and emacsclient

Fuzzy Search In Emacs

Steve Fairway Web up and running

Emacs Session Management

Add command line option to use nognus instead of gnus

Keep something called shush quiet

NoGnus takes Gnus to the next level.

Getting the repaired web server working.

Trying gmap link type

Gaming Excellence

Disaster. It doesn't get worse.

If a setting is function call that else if true call a hardcoded default

Insert or split babel src block

Altering the style of source code snippets at blogspot

Mark region as src code. If prefix used then create new org entry with the region marked as src.

Reopen a buffer as root prompting for password if necessary

workgroups for windows (emacs layouts)

Creating a regexp from a set

Store existing blogger labels in org item created by the blog search functionality

List all blogger blogs whose titles match a regular expression

Using buffer narrowing in Emacs

Last change navigation in Emacs

Sheeva plug : the idle web server

Different color themes depending on windows or terminal

Using the googlecl