Support for getting git version from IGlobalSession (#1040)

* Added slang-tag-version.h and travis code to generate the file.

* Generate slang-tag-version.h on appveyor.

* Move where slang-tag-version.h is generated on appveyor.

* Dump slang-tag-version.h to console on travis.

* Cat slang-tag-version.h

* Added method getBuildTagVersion to IGlobalSession.
Added -v option.

3 files changed, 12 insertions, 0 deletions

diff --git a/source/slang/slang-compiler.h b/source/slang/slang-compiler.h
index a6be59c76..0b97e2af7 100644
--- a/source/slang/slang-compiler.h
+++ b/source/slang/slang-compiler.h
@@ -1807,6 +1807,8 @@ namespace Slang
             SlangPassThrough inPassThrough,
             char const* prelude) override;
 
+        SLANG_NO_THROW const char* SLANG_MCALL getBuildTagString() override;
+
         enum class SharedLibraryFuncType
         {
             Glslang_Compile,
diff --git a/source/slang/slang-options.cpp b/source/slang/slang-options.cpp
index a55322d31..94f82ef31 100644
--- a/source/slang/slang-options.cpp
+++ b/source/slang/slang-options.cpp
@@ -800,6 +800,10 @@ struct OptionsParser
                         return SLANG_FAIL;
                     }
                 }
+                else if (argStr == "-v")
+                {
+                    sink->diagnoseRaw(Severity::Note, session->getBuildTagString());
+                }
                 else if (argStr == "--")
                 {
                     // The `--` option causes us to stop trying to parse options,
diff --git a/source/slang/slang.cpp b/source/slang/slang.cpp
index 601312def..da04587fd 100644
--- a/source/slang/slang.cpp
+++ b/source/slang/slang.cpp
@@ -1,4 +1,5 @@
 #include "../../slang.h"
+#include "../../slang-tag-version.h"
 
 #include "../core/slang-io.h"
 #include "../core/slang-string-util.h"
@@ -201,6 +202,11 @@ SLANG_NO_THROW void SLANG_MCALL Session::setDownstreamCompilerPrelude(
     m_downstreamCompilerPreludes[int(passThrough)] = prelude;
 }
 
+SLANG_NO_THROW const char* SLANG_MCALL Session::getBuildTagString()
+{
+    return SLANG_TAG_VERSION;
+}
+
 struct IncludeHandlerImpl : IncludeHandler
 {
     Linkage*    linkage;