[spirv] Use git submodules for SPIR-V dependency projects (#455)

.gitignore

@@ -68,9 +68,6 @@ tools/polly
 docs/_build
 # TAEF crash logs.
 WexLogFileOutput/*
-# SPIR-V dependencies.
-external/SPIRV-Headers
-external/SPIRV-Tools
 
 #==============================================================================#
 # Files created in tree by the Go bindings.

.gitmodules

@@ -0,0 +1,15 @@
+[submodule "external/SPIRV-Headers"]
+	path = external/SPIRV-Headers
+	url = https://github.com/KhronosGroup/SPIRV-Headers
+[submodule "external/SPIRV-Tools"]
+	path = external/SPIRV-Tools
+	url = https://github.com/KhronosGroup/SPIRV-Tools
+[submodule "external/googletest"]
+	path = external/googletest
+	url = https://github.com/google/googletest
+[submodule "external/re2"]
+	path = external/re2
+	url = https://github.com/google/re2
+[submodule "external/effcee"]
+	path = external/effcee
+	url = https://github.com/google/effcee

appveyor.yml

@@ -8,11 +8,7 @@ environment:
   HLSL_BLD_DIR: c:\projects\DirectXShaderCompiler.bin
 install:
 - ps: c:\projects\DirectXShaderCompiler\utils\appveyor\appveyor_setup.ps1
-- git clone --depth=1 https://github.com/google/googletest.git          %HLSL_SRC_DIR%\external\googletest
-- git clone --depth=1 https://github.com/google/effcee.git              %HLSL_SRC_DIR%\external\effcee
-- git clone --depth=1 https://github.com/google/re2.git                 %HLSL_SRC_DIR%\external\re2
-- git clone --depth=1 https://github.com/KhronosGroup/SPIRV-Headers.git %HLSL_SRC_DIR%\external\SPIRV-Headers
-- git clone --depth=1 https://github.com/KhronosGroup/SPIRV-Tools.git   %HLSL_SRC_DIR%\external\SPIRV-Tools
+- git submodule update --init --recursive
 build_script:
 - cmd: >-
     cd %HLSL_SRC_DIR%

external/SPIRV-Headers

@@ -0,0 +1 @@
+Subproject commit 63e1062a194750b354d48be8c16750d7a4d0dc4e

external/SPIRV-Tools

@@ -0,0 +1 @@
+Subproject commit dbc2049aa35a06b160b91fb76820358a17b77bfa

external/effcee

@@ -0,0 +1 @@
+Subproject commit 4a6edb2f740b9b87b04306a7815f42de5ca149a4

external/googletest

@@ -0,0 +1 @@
+Subproject commit 59c795ce08be0c8b225bc894f8da6c7954ea5c14

external/re2

@@ -0,0 +1 @@
+Subproject commit b2c9765b4a7afbea8b6be1dae548b6f4d5f39e42