A rake task to apply a patch from a Trac ticket
Tracks uses a Trac for a bug tracker, and the awesome Tracks community helpfully attaches patches to tickets for a committer (me) to review and apply. I wanted an easy way to do this, so I whipped up this rake task that let's you select a ticket and attachment to apply to the app as a patch:
RUBY:
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namespace :trac do
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desc 'Apply a patch from a trac ticket.'
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task :patch => :environment do
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require 'hpricot'
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require 'open-uri'
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require 'rubygems'
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require 'action_view/helpers/text_helper'
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include ActionView::Helpers::TextHelper
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trac_url = "http://dev.rousette.org.uk"
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unless ENV['TICKET']
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print "Enter the ticket number: "
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ENV['TICKET'] = STDIN.gets.chomp
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end
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doc = Hpricot(open("#{trac_url}/ticket/#{ENV['TICKET']}"))
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attachments_dts = doc/"#attachments"/"dt"
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attachment_index = 0
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if attachments_dts.length> 1
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print "\nThere are multiple attachments for this ticket.\n"
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attachments_dds = doc/"#attachments"/"dd"
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attachments_dts.each_with_index do |dt, i|
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print "\n[#{i + 1}] " + strip_tags(dt.inner_html) + " - " + attachments_dds[i].inner_html
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end
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print "\n\nEnter the number of the attachment you want to apply as a patch: "
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attachment_index = STDIN.gets.to_i - 1
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end
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filename = attachments_dts[attachment_index].search("a").inner_html
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patch_url = "#{trac_url}/attachment/ticket/#{ENV['TICKET']}/#{filename}?format=raw"
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patch = open(patch_url).read
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File.open('patch.diff', 'w+') do |f|
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f.puts patch
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end
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`patch -p0 <patch.diff && rm patch.diff`
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print "\nPatched with #{filename} from Trac ticket #{ENV['TICKET']}.\n"
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end
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end
Here's a sample shell session demonstrating the case when there is more than one patch attached:
CODE:
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$ rake trac:patch
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Enter the ticket number: 560
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There are multiple attachments for this ticket.
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[1] cleanup_stats_controler.diff (25.9 kB) - added by foo@barcom on 09/16/07 19:32:35. - cleanup of stats_controller
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[2] cleanup_stats_controler.2.diff (25.9 kB) - added by foo@barcom on 09/16/07 19:46:51. - whoeps old patch introduced an error. fixed with this patch
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Which number attachment do you want to use as the patch to apply: 2
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Patched with cleanup_stats_controler.2.diff from Trac ticket 560.
If there is only one attachment, it will be applied without you having to make a selection. Also, you can specify the ticket number on the command line (i.e. rake trac:patch TICKET=155).
That's it. Hope this is useful!
Thanks to Chris Wansrath of err.the_blog for the inspiration via pastie:patch.
posted 12:10 am
