Always expand history file path (fix #1262)

lib/pry/history.rb

@@ -81,10 +81,10 @@ def to_a
 
     # The default loader. Yields lines from `Pry.history.config.file`.
     def read_from_file
-      filename = File.expand_path(Pry.config.history.file)
+      path = history_file_path
 
-      if File.exists?(filename)
-        File.foreach(filename) { |line| yield(line) }
+      if File.exists?(path)
+        File.foreach(path) { |line| yield(line) }
       end
     rescue => error
       warn "History file not loaded: #{error.message}"
@@ -111,15 +111,17 @@ def history_file
       if defined?(@history_file)
         @history_file
       else
-        @history_file = File.open(file_path, 'a', 0600).tap { |f| f.sync = true }
+        @history_file = File.open(history_file_path, 'a', 0600).tap do |file|
+          file.sync = true
+        end
       end
     rescue Errno::EACCES
       warn 'History not saved; unable to open your history file for writing.'
       @history_file = false
     end
 
-    def file_path
-      @file_path || Pry.config.history.file
+    def history_file_path
+      File.expand_path(@file_path || Pry.config.history.file)
     end
   end
 end

spec/history_spec.rb

@@ -21,14 +21,14 @@
   end
 
   describe '#push' do
-    it "should not record duplicated lines" do
+    it "does not record duplicated lines" do
       Pry.history << '3'
       Pry.history << '_ += 1'
       Pry.history << '_ += 1'
       Pry.history.to_a.grep('_ += 1').count.should == 1
     end
 
-    it "should not record empty lines" do
+    it "does not record empty lines" do
       c = Pry.history.to_a.count
       Pry.history << ''
       Pry.history.to_a.count.should == c
@@ -120,7 +120,7 @@
   end
 
   describe ".load_history" do
-    it "should read the contents of the file" do
+    it "reads the contents of the file" do
       Pry.history.to_a[-2..-1].should == %w(2 3)
     end
   end
@@ -138,17 +138,35 @@
       Pry.config.history.should_save = false
     end
 
-    it "should save lines to a file as they are written" do
+    it "saves lines to a file as they are written" do
       @history.push "5"
       File.read(@histfile.path).should == "5\n"
     end
 
-    it "should interleave lines from many places" do
+    it "interleaves lines from many places" do
       @history.push "5"
       File.open(@histfile.path, 'a'){ |f| f.puts "6" }
       @history.push "7"
 
       File.read(@histfile.path).should == "5\n6\n7\n"
     end
   end
+
+  describe "expanding the history file path" do
+    before { Pry.config.history.should_save = true  }
+    after  { Pry.config.history.should_save = false }
+
+    it "recognizes ~ (#1262)" do
+      # This is a pretty dumb way of testing this, but at least it shouldn't
+      # succeed spuriously.
+      history = Pry::History.new(file_path: '~/test_history')
+      error = Class.new(RuntimeError)
+
+      File.expects(:open).
+        with("#{ENV['HOME']}/test_history", 'a', 0600).
+        raises(error)
+
+      -> { history.push 'a line' }.should.raise(error)
+    end
+  end
 end