enabling msbuild in ci now that we can fetch needed meta build bits from efrocache

tools/batools/pcommand.py

@@ -847,15 +847,36 @@ def gen_flat_data_code() -> None:
 
 def win_ci_binary_build() -> None:
     """Simple windows binary build for ci."""
-    from efrotools.efrocache import get_target
+    import json
     import subprocess
-    get_target('build/prefab/lib/windows/Debug_Win32/'
+    from efrotools.efrocache import get_target
-               'BallisticaCoreGenericInternal.lib')
-    get_target('build/prefab/lib/windows/Debug_Win32/'
-               'BallisticaCoreGenericInternal.pdb')
-    get_target('ballisticacore-windows/Generic/BallisticaCore.ico')
 
-    if bool(False):
+    # We'll need to pull a handfull of things out of efrocache for the
+    # build to succeed. Normally this would happen through our Makefile
+    # targets but we can't use them under raw window so we need to just
+    # hard-code whatever we need here.
+    needed_targets: Set[str] = {
+        'build/prefab/lib/windows/Debug_Win32/'
+        'BallisticaCoreGenericInternal.lib',
+        'build/prefab/lib/windows/Debug_Win32/'
+        'BallisticaCoreGenericInternal.pdb',
+        'ballisticacore-windows/Generic/BallisticaCore.ico'
+    }
+
+    # Look through everything that gets generated by our meta builds
+    # and pick out anything the compile requires.
+    with open('src/meta/.meta_manifest_public.json') as infile:
+        meta_public: List[str] = json.loads(infile.read())
+    with open('src/meta/.meta_manifest_private.json') as infile:
+        meta_private: List[str] = json.loads(infile.read())
+    for target in meta_public + meta_private:
+        if target.startswith('src/ballistica/generated/'):
+            needed_targets.add(target)
+
+    for target in needed_targets:
+        get_target(target)
+
+    # Do the thing.
     subprocess.run(
         [
             'C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\'
@@ -869,7 +890,6 @@ def win_ci_binary_build() -> None:
         ],
         check=True,
     )
-    print('so far so good 4', flush=True)
 
 
 def genchangelog() -> None: