add Geef.Revwalk module for Elixir

test/test_helper.exs

@@ -1,12 +1,33 @@
 ExUnit.start
 
 defmodule RepoHelpers do
+  use Geef
+
   def tmp_bare do
     {a, b, c} = :erlang.timestamp()
     n = node()
     dir = :io_lib.format("geef-~p~p~p~p.git", [n, a, b, c])
     path = Path.join(System.tmp_dir!, dir)
-    {:ok, repo} = Geef.Repository.init(path, true)
+    {:ok, repo} = Repository.init(path, true)
     {repo, path}
   end
+
+  def tmp_commit_line do
+    {repo, path} = tmp_bare()
+    sig = Signature.now("Geef Test", "test@geef")
+    message = "commit message"
+    {:ok, idx} = Index.new()
+    {:ok, empty_index} = Index.write_tree(idx, repo)
+
+    {:ok, c} = Commit.create(repo, sig, sig, message, empty_index, [])
+    {:ok, c} = Commit.create(repo, sig, sig, message, empty_index, [c])
+    {:ok, c} = Commit.create(repo, sig, sig, message, empty_index, [c])
+    boring_ancestor = c
+    {:ok, c} = Commit.create(repo, sig, sig, message, empty_index, [c])
+    {:ok, c} = Commit.create(repo, sig, sig, message, empty_index, [c])
+    {:ok, c} = Commit.create(repo, sig, sig, message, empty_index, [c])
+    head = c
+
+    {repo, path, head, boring_ancestor}
+  end
 end