Visualising Log Activity with Ruby and OpenGL with glTail

October 13th, 2007 at 1:05 pm (Ruby)

Here’s an interesting combination of Ruby and OpenGL, glTail lets you visualise log activity in realtime. Check out the screencasts on the project page!

One thing to note at the time of writing, it assumes that the command for getting incoming log data, i.e “tail -f” is non blocking. So if you need to use “sudo tail -f”, the application won’t work properly for this situation. I might give it a shot at adding sudo support when I have some time to spare.

The quick spike I did for this suggests that I’ll need to use a shell to respond to password challenges. Incidentally, Capistrano already has this figured out, so i’ll be a good place to look for clues.

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Treat code like prose

October 11th, 2007 at 9:58 am (Software Development)

Love this explanation of refactoring by Michael O McCracken.

From J.B Rainsberger.

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Moved to SliceHost

September 26th, 2007 at 10:40 pm (Linux)

I’ve moved this blog to SliceHost! Now this site is running on a snappy Gentoo 2006.1 VPS, with Apache2 and PHP5 serving the article that you’re reading. In the course of migrating the site, the following links helped immensely:

  • Check your DNS: http://pingability.com/zoneinfo.jsp
  • Configuring Postfix as your MTA: http://rimuhosting.com/support/settingupemail.jsp?mta=postfix
  • More Postfix goodness: http://www.gentoo.org/doc/en/virt-mail-howto.xml
  • Installing MySQL: http://www.gentoo.org/doc/en/mysql-howto.xml
  • Wordpress, Gentoo style: http://mormanski.net/?p=5

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Installing SSHFS on MacPorts

September 15th, 2007 at 8:43 pm (OSX)

I came across SSHFS in an article by Paul Gross and thought of trying it out. Unfortunately, I had to take a slightly more complicated route to have it installed with MacPorts on my laptop.

Running

sudo port install sshfs

caused this particular error to appear:

--->  Building fusefs

Error: Target org.macports.build returned: shell command "cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_fuse_fusefs/work/fusefs" && xcodebuild  -target "fusefs" -configuration Release build OBJROOT=build/ SYMROOT=build/ OBJROOT=build/ SYMROOT=build/" returned error 1

Command output: === BUILDING NATIVE TARGET fusefs WITH CONFIGURATION Release ===Checking Dependencies...

Cpp build/Release/fusefs.kext/Contents/Info.plist build/fusefs.build/Release/fusefs.build/Info.plist

    cd /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_fuse_fusefs/work/fusefs

    /usr/bin/gcc -E -P -x c -Wno-trigraphs /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_fuse_fusefs/work/fusefs/build/fusefs.build/Release/fusefs.build/Info.plist -o /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_fuse_fusefs/work/fusefs/build/Release/fusefs.kext/Contents/Info.plist

/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_fuse_fusefs/work/fusefs/build/fusefs.build/Release/fusefs.build/Info.plist:1:33: error: common/fuse_version.h: No such file or directory

/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_fuse_fusefs/work/fusefs/build/fusefs.build/Release/fusefs.build/Info.plist:2:31: error: common/fuse_param.h: No such file or directory

** BUILD FAILED **

Error: The following dependencies failed to build: fusefs libfuse

Error: Status 1 encountered during processing.

A quick spot of googling found the answer to this pretty quickly. Hans-Göran (comment #24) mentioned that he managed to install fusefs after copying the files that the error was complaining were missing.

At first glance, it seems that the file in question (common/fuse_param.h) is indeed present in the build directory. It appears that the error is being triggered from the property list file for the build.

/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_fuse_fusefs/work/fusefs/build/fusefs.build/Release/fusefs.build/Info.plist

Taking a look at its contents reveals that it’s including 2 header files from its containing directory

#include "common/fuse_version.h"

#include "common/fuse_param.h"

So I copied over the missing directory and re-ran the sshfs install.

cd /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_fuse_fusefs/work/fusefs

sudo cp -r common build/fusefs.build/Release/fusefs.build/

sudo port install sshfs
--->  Fetching libfuse
--->  Attempting to fetch fuse-2.6.5-macosx.patch from http://macfuse.googlecode.com/svn/tags/macfuse-0.4.0/libfuse/
--->  Attempting to fetch fuse-2.6.5.tar.gz from http://downloads.sourceforge.net/fuse
--->  Verifying checksum(s) for libfuse
--->  Extracting libfuse
--->  Applying patches to libfuse
--->  Configuring libfuse
--->  Building libfuse with target all
--->  Staging libfuse into destroot
--->  Installing libfuse 2.6.5_1
--->  Activating libfuse 2.6.5_1
--->  Cleaning libfuse
--->  Fetching sshfs
--->  Attempting to fetch sshfs-fuse-1.7-macosx.patch from http://macfuse.googlecode.com/svn/tags/macfuse-0.4.0/filesystems/sshfs
--->  Attempting to fetch sshfs-fuse-1.7.tar.gz from http://downloads.sourceforge.net/fuse
--->  Verifying checksum(s) for sshfs
--->  Extracting sshfs
--->  Applying patches to sshfs
--->  Configuring sshfs
--->  Building sshfs with target all
--->  Staging sshfs into destroot
--->  Installing sshfs 1.7_5
--->  Activating sshfs 1.7_5
--->  Cleaning sshfs

Now sshfs is installed!

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