Updated build scripts and README.md

Updated build scripts. README was updated to include instructions
on how to build and generate bindings.

README.md

@@ -14,6 +14,12 @@ dependencies:
     github: mjblack/win32cr
 ```
 
+Build WinMD by executing the script `build.ps1` in the location where the shard `win32cr` is installed.
+
+```
+C:\Projects\SomeCrystalApp\lib\win32cr> & .\build.ps1
+```
+
 ## Usage
 
 For more examples, please see the [examples](https://github.com/mjblack/win32cr/tree/master/examples) directory.

build.ps1

@@ -36,12 +36,20 @@ function Run {
     if ($env:WINMD_TRACE) {
         $WINMD_PARAMS = $WINMD_PARAMS + " -t"
     }
-
-    & .\bin\winmd.exe generate $WINMD_PARAMS json\win32json\api .
+    mkdir src/win32cr
+    Start-Process -Wait -NoNewWindow -FilePath .\bin\winmd.exe -ArgumentList "generate","${WINMD_PARAMS}","json\\win32json\\api","."
+}
+
+function BuildWinMD {
+
+    if (!(Test-Path .\bin\winmd.exe)) {
+        & .\scripts\build_winmd.ps1
+    }
 }
 
 
 PrepSrcDir
 PrepJSON
+BuildWinMD
 Run
 CleanUp

scripts/build_winmd.ps1

@@ -1,6 +1,34 @@
-Set-Location .\lib\winmd
-mkdir bin
-& .\build.ps1
-Set-Location ..\..
-mkdir bin
+function returnToRoot {
+    Set-Location ..\..
+}
+
+if (!(Test-Path .\lib\winmd)) {
+    throw "WinMD shard not found"
+}
+
+if (!(Test-Path .\lib\winmd\bin\winmd.exe)) {
+    Set-Location .\lib\winmd
+
+    # create bin dir under winmc
+    if (!(Test-Path .\bin)) {
+        mkdir bin
+    }
+
+    if (!(Test-Path .\build.ps1)) {
+        returnToRoot
+        throw "WinMD build script not found in WinMD shard"
+    }
+
+    & .\build.ps1
+
+    returnToRoot
+
+    # create the bin dir under win32cr
+    if (!(Test-Path .\bin)) {
+        mkdir bin
+    }
+    if (!(Test-Path .\lib\winmd\bin\winmd.exe)) {
+        throw "WinMD executable not found"
+    }
+}
 Copy-Item .\lib\winmd\bin\winmd.exe .\bin\winmd.exe