Merge pull request #699 from massimosiani/stripMargin

add the stripMargin utility

modules/core/shared/src/main/scala/Fragment.scala

@@ -42,6 +42,18 @@ final case class Fragment[A](
   def ~[B](fb: Fragment[B]): Fragment[A ~ B] =
     product(fb)
 
+  def stripMargin: Fragment[A] = stripMargin('|')
+
+  def stripMargin(marginChar: Char): Fragment[A] = {
+    val ps = parts.map {
+      _.bimap(
+        _.stripMargin(marginChar).replaceAll("\n", " "),
+        _.map(_.stripMargin(marginChar).replaceAll("\n", " "))
+      )
+    }
+    Fragment(ps, encoder, origin)
+  }
+
   def apply(a: A): AppliedFragment =
     AppliedFragment(this, a)
 

modules/tests/shared/src/test/scala/FragmentTest.scala

@@ -60,5 +60,18 @@ class FragmentTest extends SkunkTest {
       } yield "ok"
     }
   }
-}
 
+  pureTest("stripMargin") {
+    val f = sql"""select
+    |$int4
+    |""".stripMargin
+    f.sql.trim == sql"select $int4".sql
+  }
+
+  pureTest("stripMargin with char") {
+    val f = sql"""select
+    ^$int4
+    ^""".stripMargin('^')
+    f.sql.trim == sql"select $int4".sql
+  }
+}