fix: support database.yml with explicit primary

lib/veksel/cli.rb

@@ -16,6 +16,10 @@ def self.fork
       require 'fileutils'
 
       config = read_config('config/database.yml')[:development]
+      if config.key?(:primary)
+        config = config[:primary]
+        $stderr.puts "Warning: Only your primary database will be forked"
+      end
 
       target_database = config[:database] + Veksel.suffix
       db = OpenStruct.new(configuration_hash: config, database: target_database)

test/dummy/config/database.primary.yml

@@ -0,0 +1,19 @@
+development:
+  primary:
+    adapter: postgresql
+    encoding: unicode
+    database: veksel_dummy_development
+    port: 5555
+    host: localhost
+    username: veksel
+    password: foobar
+
+test:
+  primary:
+    adapter: postgresql
+    encoding: unicode
+    database: veksel_dummy_test
+    port: 5555
+    host: localhost
+    username: veksel
+    password: foobar

test/veksel_test.rb

@@ -53,6 +53,16 @@ def run_fork_test
         end
       end
     end
+
+    test "veksel fork should work when using primary: db config" do
+      swap_db_config('database.primary.yml') do
+        Dir.chdir('test/dummy') do
+          git_checkout('somebranch') do
+            run_fork_test
+          end
+        end
+      end
+    end
   end
 
   test "performance" do