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caio chassot http://caiochassot.com/

7 total

On This Page:

  1. 1 Temporarily override your git credentials during a shell session
  2. 2 Converting FileColumn store versions from old format to new format (/x) to (/0000/000x)
  3. 3 update a working copy and all externals in parallel
  4. 4 Replacing all shebangs in a rails app
  5. 5 opening in a textmate project all files that match a pattern
  1. 6 knowning how many commits it actually took you
  2. 7 suppressing NoMethodError when receiver is nil, within a block

Temporarily override your git credentials during a shell session

to bash git by kch on Aug 06, 2009
Great when messing around in repos in random servers:

export GIT_AUTHOR_EMAIL="pimp@example.com"
export GIT_AUTHOR_NAME="Pimptastic Coder Quick"
export GIT_COMMITTER_EMAIL="$GIT_AUTHOR_EMAIL"
export GIT_COMMITTER_NAME="$GIT_AUTHOR_NAME"


now, git commit yourself away.

Converting FileColumn store versions from old format to new format (/x) to (/0000/000x)

to ruby rails irb file_column by kch on Feb 08, 2009 2 Comments
As of somewhen, the file_column rails plugin changed its storage layout and it doesn't seem to provide any way to migrate. Here's a simple snippet that'll do it.

Start an irb session in the directory where your file_column stores its files. By default that's RAILS_ROOT/public. In irb, run the following:

Dir['*/*/*'].grep(%r{[^/]+/[^/]+/\d+}).map { |s| [s.sub(/\d+$/, ''), $&.to_i] }\
  .map { |s, n| ["#{s}#{n}", (d = "#{s}%04d" % (n / 10000)), "#{d}/%04d" % (n % 10000)] }\
  .each { |f, d, t| `mkdir -p #{d} && mv #{f} #{t}` }


Or, as a migration

class UpgradeFileColumns < ActiveRecord::Migration
  def self.up
    # note I use a custom store path here
    Dir.chdir("#{RAILS_ROOT}/public/files")
    Dir['*/*/*'].grep(%r{[^/]+/[^/]+/\d+}).map { |s| [s.sub(/\d+$/, ''), $&.to_i] }\
      .map { |s, n| ["#{s}#{n}", (d = "#{s}%04d" % (n / 10000)), "#{d}/%04d" % (n % 10000)] }\
      .each { |f, d, t| `mkdir -p #{d} && mv #{f} #{t}` }
  end

  def self.down
  end
end


update a working copy and all externals in parallel

to ruby shell svn subversion by kch on Jul 04, 2006 1 Comments
If you have an app in subversion with many externals, it may take a bit too long to update it, as updates happen one after another.

This bit of script updates the app and each external in parallel, making it oh so much faster.


#!/usr/local/bin/ruby

puts(
  ( `svn pl -R`.scan(/\S.*'(.*)':\n((?:  .*\n)+)/)\
    .inject({}) { |h, (d, p)| h[d] = p.strip.split(/\s+/); h }\
    .select { |d, ps| ps.include? 'svn:externals' }\
    .map { |xd, ps| [xd, `svn pg svn:externals #{xd}`] }\
    .map { |xd, exts| exts.strip.split(/\s*\n/).map { |l| xd + '/' + l.split(/\s+/).first } }\
    .inject { |a, b| a + b }\
    .map { |d| "cd #{d} && svn up 2>&1" } \
    << 'svn up . --ignore-externals 2>&1'
  )\
  .map { |cmd| [cmd, Thread.new { `#{cmd}` }] }\
  .map { |cmd, thread| "#{cmd}\n#{thread.value}" }.join("\n")
)


(note: if you add an external or change an external property in another way, you'll need to run the standard svn up once)

Replacing all shebangs in a rails app

to ruby rails perl regex shell shebang by kch on May 08, 2006 
perl -pi -e 's|^#!/.*|#!/usr/bin/env ruby|;' script/* script/*/* public/dispatch.*

opening in a textmate project all files that match a pattern

to grep regex shell osx mac unix textmate by kch on Apr 20, 2006 1 Comments
This will pass all matched filenames to textmate, generating a project with all files flatly in the drawer (no dirs)

egrep -lr pattern * | grep -v .svn | xargs mate

knowning how many commits it actually took you

to svn subversion by kch on Oct 05, 2005
If you use the same repository for mostly everything, you'll occasionally find it amusing that your brand new project is at r1800 or that that old project not touched since r60 now shares r2385 with everyone else.

Well, amusing != useful, so here's what I use when I'm curious about how many commits a certain project took me:

svn log --stop-on-copy | grep -e "--------" | wc -l

suppressing NoMethodError when receiver is nil, within a block

to ruby rails error by kch on Oct 04, 2005 1 Comments
Often in rails you'll do things like

<%= @post.author.name %>


but it may be that you have no post, or the post has no author, and even if that's ok, the above would raise. I came up with a solution that lets you do the following:

<%= ifnil("no author"){ @post.author.name } %>


If at any point the receiver is nil (either @post or #author), execution of the block is stopped and the default value is returned ("no author" in this case, but defaults to nil)

NoMethodError is still raised if you send an invalid message to a non-nil receiver.

Here's the code for ifnil

def ifnil(value=nil)
  yield
  rescue NoMethodError
  raise unless $!.message =~ /:NilClass$/
  value
end

7 total

On This Page:

  1. 1 Temporarily override your git credentials during a shell session
  2. 2 Converting FileColumn store versions from old format to new format (/x) to (/0000/000x)
  3. 3 update a working copy and all externals in parallel
  4. 4 Replacing all shebangs in a rails app
  5. 5 opening in a textmate project all files that match a pattern
  1. 6 knowning how many commits it actually took you
  2. 7 suppressing NoMethodError when receiver is nil, within a block