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@@ -105,7 +105,7 @@ module Grit
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     # Find all commits matching the given criteria.
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     #   +repo+ is the Repo
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-    #   +ref+ is the ref from which to begin (SHA1 or name)
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+    #   +ref+ is the ref from which to begin (SHA1 or name) or nil for --all
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     #   +options+ is a Hash of optional arguments to git
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     #     :max_count is the maximum number of commits to fetch
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     #     :skip is the number of commits to skip
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@@ -117,7 +117,11 @@ module Grit
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       default_options = {:pretty => "raw"}
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       actual_options = default_options.merge(options)
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-      output = repo.git.rev_list(actual_options, ref)
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+      if ref
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+        output = repo.git.rev_list(actual_options, ref)
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+      else
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+        output = repo.git.rev_list(actual_options.merge(:all => true))
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+      end
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       self.list_from_string(repo, output)
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     end

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@@ -87,10 +87,11 @@ module Grit
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     # Commits are returned in chronological order.
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     #   +start+ is the branch/commit name (default 'master')
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     #   +since+ is a string represeting a date/time
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+    #   +extra_options+ is a hash of extra options
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     #
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     # Returns Grit::Commit[] (baked)
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-    def commits_since(start = 'master', since = '1970-01-01')
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-      options = {:since => since}
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+    def commits_since(start = 'master', since = '1970-01-01', extra_options = {})
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+      options = {:since => since}.merge(extra_options)
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       Commit.find_all(self, start, options)
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     end