Windows build scripts: if CMake generator not passed, deduce the generator from VS env vars.

README.md

@@ -34,16 +34,16 @@ the cmake/ folder.
 
 The preferred way to fetch and build this project's dependencies is to use the build scripts
 in win/ folder. See [win/readme.md] for more information. Instructions in a nutshell
-(assuming Visual Studio x64 environment variables set):
+(**assuming Visual Studio 2015 x64 environment variables set**):
 
     > git clone https://github.com/IfcOpenShell/IfcOpenShell.git
     > cd oce\win
-    > build-deps.cmd (defaults to using VS 2015 x64 RelWithDebInfo build)
-    > run-cmake.bat (defaults to using VS 2015 x64)
+    > build-deps.cmd (defaults to RelWithDebInfo build)
+    > run-cmake.bat
     > ..\build-vs2015-x64\IfcOpenShell.sln
 
-You can now build the solution using the RelWithDebInfo configuration (freshly created solution by CMake defaults to Debug).
-Build the INSTALL project to deploy the headers and binaries into a single location if wanted/needed.
+You can now build the solution using the `RelWithDebInfo` configuration (freshly created solution by CMake defaults to `Debug`).
+Build the `INSTALL` project to deploy the headers and binaries into a single location if wanted/needed.
 
 Alternatively, the old Visual Studio solution and project files requiring manual work can
 be found from the win/sln folder.

win/readme.md

@@ -14,19 +14,21 @@ the requirements for a successful execution. The script allows a few user-config
 which are listed in the usage instructions. Either edit the script file or set these values before
 running the script.
 
-`build-deps.cmd` expects a CMake generator as `%1` and a build configuration type as `%2`. If the parameters
-are not provided, the default values are used (`"Visual Studio 14 2015 Win64"` and `RelWithDebInfo` respectively).
-A build type (`Build/Rebuild/Clean`) can be provided as `%3`, if wanted (defaults to `Build`). See `vs-cfg.cmd`
-if you want to change the defaults. The batch file will create `deps\` and `deps-vs<VERSION>-<ARCHITECTURE>-installed\`
+`build-deps.cmd` expects a CMake generator as `%1` and a build configuration type (`RelWithDebInfo/Release/MinSizeRel/Debug`,
+defaults to `RelWithDebInfo`) as `%2`. If the generator is not provided, the generator is deduced from the Visual Studio
+environment variables. A build type (`Build/Rebuild/Clean`, defaults to `Build`) can be provided as `%3`. See `vs-cfg.cmd`
+if you wish to change the defaults. The batch file will create `deps\` and `deps-vs<VERSION>-<ARCHITECTURE>-installed\`
 directories to the project root. Debug and release builds of the depedencies can co-exist by simply running
 `build-deps.cmd <GENERATOR> Debug` and `build-deps.cmd <GENERATOR> <Release|RelWithDebInfo|MinSizeRel>`.
 
-After the dependencies are build, execute `run-cmake.bat`. The batch file expects always a CMake generator as
-`%1` (if not provided, the same default value as above is used), and the rest of possible parameters are passed as is.
+After the dependencies are build, execute `run-cmake.bat`. The batch file expects always a CMake generator as `%1`
+(if not provided, the same default value as above is used), and the rest of possible parameters are passed as is.
+**If you wish to use any library from a custom location, modify the paths in `run-cmake.bat` accordingly**. The batch
+script will create a folder of form `build-vs<VERSION>-<ARCHITECTURE>\` which will contain the solution and project
+files for Visual Studio.
 
-The batch script will create a folder of form `build-vs<VERSION>-<ARCHITECTURE>\` which will contain the solution and project files for Visual Studio.
-**If you wish to use any library from a custom location, modify the paths in run-cmake.bat 
-accordingly**.
+Note that building IfcOpenShell as 64-bit is recommended as many of real life IFC files has been observed to take
+easily more than 2 GBs of RAM while converting.
 
 After this, one can build the project using the `IfcOpenShell.sln` file in the build folder. Build the `INSTALL` project
 if wanted. The project will be installed to `installed-vs<VERSION>-<ARCHITECTURE>\` folder in the project's root

win/run-cmake.bat

@@ -26,6 +26,7 @@ set PROJECT_NAME=IfcOpenShell
 setlocal EnableDelayedExpansion
 :: TODO Getting warning print in vs-cfg.cmd for missing build type although this script doesn't need it specified
 call vs-cfg.cmd %1
+IF NOT %ERRORLEVEL%==0 GOTO :Error
 
 :: Read Python related variables from BuildDepsCache.txt
 for /f "delims== tokens=1,2" %%G in (BuildDepsCache-%TARGET_ARCH%.txt) do set %%G=%%H
@@ -103,7 +104,7 @@ goto :Finish
 
 :Error
 echo.
-cecho {0C}An error occurred! Aborting!"
+call %~dp0\utils\cecho.cmd 0 12 "An error occurred! Aborting!"
 goto :Finish
 
 :Finish

win/vs-cfg.cmd

@@ -19,6 +19,8 @@
 
 :: This script initializes various Visual Studio -related environment variables needed for building
 :: This batch file expects CMake generator as %1 and build configuration type as %2.
+:: If %1 is not provided, it is deduced from the VisualStudioVersion environment variable and from the location of cl.exe.
+
 :: NOTE This batch file expects the generator string to be CMake 3.0.0 and newer format, i.e.
 :: "Visual Studio 10 2010" instead of "Visual Studio 10". However, one can use this batch file
 :: also with CMake 2 as the generator will be converted into the older format if necessary.
@@ -33,29 +35,43 @@ set GENERATOR=%1
 :: F.ex. "vs2013-32" and/or "vc14-64"
 
 :: Supported Visual Studio versions:
-set GENERATORS[0]="Visual Studio 14 2015"
-set GENERATORS[1]="Visual Studio 14 2015 Win64"
-set GENERATORS[2]="Visual Studio 12 2013"
-set GENERATORS[3]="Visual Studio 12 2013 Win64"
-set GENERATORS[4]="Visual Studio 11 2012"
-set GENERATORS[5]="Visual Studio 11 2012 Win64"
-set GENERATORS[6]="Visual Studio 10 2010"
-set GENERATORS[7]="Visual Studio 10 2010 Win64"
-set GENERATORS[8]="Visual Studio 9 2008"
-set GENERATORS[9]="Visual Studio 9 2008 Win64"
-set GENERATOR_DEFAULT=%GENERATORS[1]%
+set GENERATORS[0]="Visual Studio 9 2008 Win64"
+set GENERATORS[1]="Visual Studio 9 2008"
+set GENERATORS[2]="Visual Studio 10 2010 Win64"
+set GENERATORS[3]="Visual Studio 10 2010"
+set GENERATORS[4]="Visual Studio 11 2012 Win64"
+set GENERATORS[5]="Visual Studio 11 2012"
+set GENERATORS[6]="Visual Studio 12 2013 Win64"
+set GENERATORS[7]="Visual Studio 12 2013"
+set GENERATORS[8]="Visual Studio 14 2015 Win64"
+set GENERATORS[9]="Visual Studio 14 2015"
+set LAST_GENERATOR_IDX=9
 
-IF "!GENERATOR!"=="" (
-    set GENERATOR=%GENERATOR_DEFAULT%
-    call utils\cecho.cmd 0 14 "%~nx0: Warning: Generator not passed - using the default '`"%GENERATOR_DEFAULT%`'`t
+REM Deduce desired architecture from the location of cl.exe
+where cl.exe | findstr /r /c:"amd64" >nul
+set START=%ERRORLEVEL%
+set STEP=2
+
+IF "!GENERATOR!"=="" IF NOT "%VisualStudioVersion%"=="" (
+    set VC_VER=%VisualStudioVersion:.0=%
+    FOR /l %%i in (%START%,%STEP%,%LAST_GENERATOR_IDX%) DO (
+        REM http://stackoverflow.com/a/8758579
+        REM NOTE add space before VC_VER so that e.g. "12" doesn't match with "2012"
+        echo(!GENERATORS[%%i]! | findstr /r /c:" !VC_VER!" >nul && (
+            set GENERATOR=!GENERATORS[%%i]!
+            call utils\cecho.cmd black cyan "Generator not passed, but VisualStudioVersion=%VisualStudioVersion% environment variable detected:"
+            call utils\cecho.cmd black cyan "using '`"!GENERATOR!`'" as the generator."
+            GOTO :GeneratorValid
+        )
+    )
 )
 
-FOR /l %%i in (0,1,9) DO (
+FOR /l %%i in (0,1,%LAST_GENERATOR_IDX%) DO (
     IF !GENERATOR!==!GENERATORS[%%i]! GOTO :GeneratorValid
 )
 call utils\cecho.cmd 0 12 "%~nx0: Invalid or unsupported CMake generator string passed: '`"!GENERATOR!`'". Cannot proceed, aborting!"
 echo Supported CMake generator strings:
-FOR /l %%i in (0,1,9) DO (
+FOR /l %%i in (0,1,%LAST_GENERATOR_IDX%) DO (
     echo !GENERATORS[%%i]!
 )
 exit /b 1