Change to Apache 2.0 License (#1901)

20 files changed, 21 insertions, 19 deletions

diff --git a/src/test/scala/firrtl/JsonProtocolSpec.scala b/src/test/scala/firrtl/JsonProtocolSpec.scala
index cc7591cb..0da43204 100644
--- a/src/test/scala/firrtl/JsonProtocolSpec.scala
+++ b/src/test/scala/firrtl/JsonProtocolSpec.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtlTests
 
diff --git a/src/test/scala/firrtl/analysis/SymbolTableSpec.scala b/src/test/scala/firrtl/analysis/SymbolTableSpec.scala
index ca30b60b..f70b9668 100644
--- a/src/test/scala/firrtl/analysis/SymbolTableSpec.scala
+++ b/src/test/scala/firrtl/analysis/SymbolTableSpec.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.analysis
 
diff --git a/src/test/scala/firrtl/backends/experimental/smt/Btor2Spec.scala b/src/test/scala/firrtl/backends/experimental/smt/Btor2Spec.scala
index 56f891e6..32976d30 100644
--- a/src/test/scala/firrtl/backends/experimental/smt/Btor2Spec.scala
+++ b/src/test/scala/firrtl/backends/experimental/smt/Btor2Spec.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.backends.experimental.smt
 
diff --git a/src/test/scala/firrtl/backends/experimental/smt/FirrtlExpressionSemanticsSpec.scala b/src/test/scala/firrtl/backends/experimental/smt/FirrtlExpressionSemanticsSpec.scala
index f7ce9914..5956cf03 100644
--- a/src/test/scala/firrtl/backends/experimental/smt/FirrtlExpressionSemanticsSpec.scala
+++ b/src/test/scala/firrtl/backends/experimental/smt/FirrtlExpressionSemanticsSpec.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.backends.experimental.smt
 
diff --git a/src/test/scala/firrtl/backends/experimental/smt/FirrtlModuleToTransitionSystemSpec.scala b/src/test/scala/firrtl/backends/experimental/smt/FirrtlModuleToTransitionSystemSpec.scala
index 32902e76..f4b3a1f5 100644
--- a/src/test/scala/firrtl/backends/experimental/smt/FirrtlModuleToTransitionSystemSpec.scala
+++ b/src/test/scala/firrtl/backends/experimental/smt/FirrtlModuleToTransitionSystemSpec.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.backends.experimental.smt
 
diff --git a/src/test/scala/firrtl/backends/experimental/smt/SMTBackendBaseSpec.scala b/src/test/scala/firrtl/backends/experimental/smt/SMTBackendBaseSpec.scala
index 209279fd..a82767ae 100644
--- a/src/test/scala/firrtl/backends/experimental/smt/SMTBackendBaseSpec.scala
+++ b/src/test/scala/firrtl/backends/experimental/smt/SMTBackendBaseSpec.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.backends.experimental.smt
 
diff --git a/src/test/scala/firrtl/backends/experimental/smt/SMTLibSpec.scala b/src/test/scala/firrtl/backends/experimental/smt/SMTLibSpec.scala
index 7193474d..b970484e 100644
--- a/src/test/scala/firrtl/backends/experimental/smt/SMTLibSpec.scala
+++ b/src/test/scala/firrtl/backends/experimental/smt/SMTLibSpec.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.backends.experimental.smt
 
diff --git a/src/test/scala/firrtl/backends/experimental/smt/end2end/AsyncResetSpec.scala b/src/test/scala/firrtl/backends/experimental/smt/end2end/AsyncResetSpec.scala
index e7c8d534..b1e95365 100644
--- a/src/test/scala/firrtl/backends/experimental/smt/end2end/AsyncResetSpec.scala
+++ b/src/test/scala/firrtl/backends/experimental/smt/end2end/AsyncResetSpec.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.backends.experimental.smt.end2end
 
diff --git a/src/test/scala/firrtl/backends/experimental/smt/end2end/EndToEndSMTSpec.scala b/src/test/scala/firrtl/backends/experimental/smt/end2end/EndToEndSMTSpec.scala
index 974d2e81..b1ba8e32 100644
--- a/src/test/scala/firrtl/backends/experimental/smt/end2end/EndToEndSMTSpec.scala
+++ b/src/test/scala/firrtl/backends/experimental/smt/end2end/EndToEndSMTSpec.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.backends.experimental.smt.end2end
 
diff --git a/src/test/scala/firrtl/backends/experimental/smt/end2end/MemorySpec.scala b/src/test/scala/firrtl/backends/experimental/smt/end2end/MemorySpec.scala
index 61e1f0f8..e38195e2 100644
--- a/src/test/scala/firrtl/backends/experimental/smt/end2end/MemorySpec.scala
+++ b/src/test/scala/firrtl/backends/experimental/smt/end2end/MemorySpec.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.backends.experimental.smt.end2end
 
diff --git a/src/test/scala/firrtl/backends/experimental/smt/end2end/RequiresZ3.scala b/src/test/scala/firrtl/backends/experimental/smt/end2end/RequiresZ3.scala
index d633a1a0..91c3ee92 100644
--- a/src/test/scala/firrtl/backends/experimental/smt/end2end/RequiresZ3.scala
+++ b/src/test/scala/firrtl/backends/experimental/smt/end2end/RequiresZ3.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.backends.experimental.smt.end2end
 
diff --git a/src/test/scala/firrtl/backends/experimental/smt/end2end/SMTCompilationTest.scala b/src/test/scala/firrtl/backends/experimental/smt/end2end/SMTCompilationTest.scala
index 8ece0e23..72949830 100644
--- a/src/test/scala/firrtl/backends/experimental/smt/end2end/SMTCompilationTest.scala
+++ b/src/test/scala/firrtl/backends/experimental/smt/end2end/SMTCompilationTest.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.backends.experimental.smt.end2end
 
diff --git a/src/test/scala/firrtl/backends/experimental/smt/end2end/UndefinedFirrtlSpec.scala b/src/test/scala/firrtl/backends/experimental/smt/end2end/UndefinedFirrtlSpec.scala
index 8682c2ce..c1587580 100644
--- a/src/test/scala/firrtl/backends/experimental/smt/end2end/UndefinedFirrtlSpec.scala
+++ b/src/test/scala/firrtl/backends/experimental/smt/end2end/UndefinedFirrtlSpec.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.backends.experimental.smt.end2end
 
diff --git a/src/test/scala/firrtl/ir/StructuralHashSpec.scala b/src/test/scala/firrtl/ir/StructuralHashSpec.scala
index c4622939..ffd03126 100644
--- a/src/test/scala/firrtl/ir/StructuralHashSpec.scala
+++ b/src/test/scala/firrtl/ir/StructuralHashSpec.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.ir
 
diff --git a/src/test/scala/firrtl/passes/LowerTypesSpec.scala b/src/test/scala/firrtl/passes/LowerTypesSpec.scala
index 0575c5da..70fa51fd 100644
--- a/src/test/scala/firrtl/passes/LowerTypesSpec.scala
+++ b/src/test/scala/firrtl/passes/LowerTypesSpec.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 import firrtl.annotations.{CircuitTarget, IsMember}
diff --git a/src/test/scala/firrtl/stage/phases/tests/ConvertCompilerAnnotationsSpec.scala b/src/test/scala/firrtl/stage/phases/tests/ConvertCompilerAnnotationsSpec.scala
index acd37bf5..30163842 100644
--- a/src/test/scala/firrtl/stage/phases/tests/ConvertCompilerAnnotationsSpec.scala
+++ b/src/test/scala/firrtl/stage/phases/tests/ConvertCompilerAnnotationsSpec.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.stage.phases.tests
 
diff --git a/src/test/scala/firrtl/stage/phases/tests/DriverCompatibilitySpec.scala b/src/test/scala/firrtl/stage/phases/tests/DriverCompatibilitySpec.scala
index 0b9b830c..e421e2f8 100644
--- a/src/test/scala/firrtl/stage/phases/tests/DriverCompatibilitySpec.scala
+++ b/src/test/scala/firrtl/stage/phases/tests/DriverCompatibilitySpec.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.stage.phases.tests
 
diff --git a/src/test/scala/firrtl/testutils/FirrtlSpec.scala b/src/test/scala/firrtl/testutils/FirrtlSpec.scala
index 244366f4..3a6f9372 100644
--- a/src/test/scala/firrtl/testutils/FirrtlSpec.scala
+++ b/src/test/scala/firrtl/testutils/FirrtlSpec.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.testutils
 
diff --git a/src/test/scala/firrtl/testutils/LeanTransformSpec.scala b/src/test/scala/firrtl/testutils/LeanTransformSpec.scala
index 4ae6a7be..d3510326 100644
--- a/src/test/scala/firrtl/testutils/LeanTransformSpec.scala
+++ b/src/test/scala/firrtl/testutils/LeanTransformSpec.scala
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 package firrtl.testutils
 
 import firrtl.{ir, AnnotationSeq, CircuitState, EmitCircuitAnnotation}
diff --git a/src/test/scala/firrtl/testutils/PassTests.scala b/src/test/scala/firrtl/testutils/PassTests.scala
index 7a5dc306..3848ac95 100644
--- a/src/test/scala/firrtl/testutils/PassTests.scala
+++ b/src/test/scala/firrtl/testutils/PassTests.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.testutils