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francois / piston fork watch download tarball
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Rubygem
Description: Piston is a utility that eases vendor branch management. This repository is a complete reimplementation of Piston to provide different backends, depending on the repositories and working copies you pistonize from.
Homepage: http://piston.rubyforge.org/
Clone URL: git://github.com/francois/piston.git 
Piston::Git::Repository#understands_url? should not break if git-ls-remote 
failed.

This only indicates that the remote repository isn't a Git repository.
francois (author)
Sat Mar 22 18:17:10 -0700 2008
commit  92a28cb69ba1a52a7c15d3ee26bf002f5256c3c1
tree    2e37ed669d8bc5b2bdc3c98c579667a4e4400114
parent  6521f826457f8ef2aba8e25f10d60ef419a6511f
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lib/piston/git/repository.rb 
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@@ -14,9 +14,13 @@ module Piston
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           uri = URI.parse(url)
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           return true if %w(git).include?(uri.scheme)
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-          response = git("ls-remote", "--heads", url)
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-          return false if response.nil? || response.strip.chomp.empty?
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-          !!(response =~ /[a-f\d]{40}\s/)
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+          begin
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+            response = git("ls-remote", "--heads", url)
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+            return false if response.nil? || response.strip.chomp.empty?
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+            !!(response =~ /[a-f\d]{40}\s/)
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+          rescue Piston::Git::Client::CommandError
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+            false
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+          end
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         end
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       end
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