externalise buck file

.buck/prelude

@@ -0,0 +1 @@
+Subproject commit e6ee46050e74f339433eaecb127bf1dde2cb3426

.buck/shim/BUCK

@@ -0,0 +1,3 @@
+load("@prelude//toolchains:demo.bzl", "system_demo_toolchains")
+
+system_demo_toolchains()

.buck/shim/README.md

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+# Open Source Shim
+
+These files are a shim that allow us to build Object Introspection with Buck2 outside Meta in the open source world.

.buckconfig

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+[repositories]
+root = .
+prelude = .buck/prelude
+shim = .buck/shim
+
+[repository_aliases]
+config = prelude
+ovr_config = prelude
+toolchains = shim
+fbcode = shim
+fbcode_macros = shim
+fbsource = shim
+buck = shim
+
+[parser]
+target_platform_detector_spec = target:root//...->prelude//platforms:default target:shim//...->prelude//platforms:default
+

.gitignore

@@ -14,6 +14,9 @@ PADDING
 failed
 website/node_modules
 
+## Buck
+buck-out/
+
 ## Vim
 *.swp
 *.swo

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "extern/drgn"]
   path = extern/drgn
   url = https://github.com/JakeHillion/drgn.git
+[submodule ".buck/buck2-prelude"]
+	path = .buck/prelude
+	url = https://github.com/facebook/buck2-prelude

BUCK

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+load("@fbcode_macros//build_defs:native_rules.bzl", "alias")
+
+alias(
+  name = "oid",
+  actual = "//oi:oid",
+)

oi/BUCK

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+cxx_binary(
+  name = "oid",
+  srcs = [
+    "OID.cpp",
+    "OIDebugger.cpp",
+  ],
+  headers = [
+    "OIDebugger.h",
+    "Syscall.h",
+    "TrapInfo.h",
+  ], 
+)
+