From f75ed9878e92155c2d7b536d1a0a8fbd013f165d Mon Sep 17 00:00:00 2001
From: Лач <iam@lach.pw>
Date: Sat, 27 Jun 2020 20:23:46 +0000
Subject: [PATCH] feat(bindings): c bindings


---
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -162,6 +162,14 @@
 version = "1.0.0"
 
 [[package]]
+name = "jsonnet"
+version = "0.1.0"
+dependencies = [
+ "jrsonnet-evaluator",
+ "libc",
+]
+
+[[package]]
 name = "lazy_static"
 version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,6 +3,7 @@
 	"crates/jrsonnet-parser",
 	"crates/jrsonnet-evaluator",
 	"crates/jrsonnet-stdlib",
+	"bindings/jsonnet",
 	"cmds/jrsonnet"
 ]
 
@@ -12,6 +13,3 @@
 codegen-units = 1
 debug = 0
 panic = "abort"
-
-[profile.test]
-opt-level = 1
--- a/README.md
+++ b/README.md
@@ -19,7 +19,11 @@
 
 ## Bindings
 
-Currently no language bindings are implemented
+C bindings (libjsonnet.so) are WIP
+
+Something is implemented, but mostly unusable for now
+
+See them in `./bindings/jsonnet/`
 
 ## Benchmark
 
--- /dev/null
+++ b/bindings/Makefile
@@ -0,0 +1,11 @@
+../target/release/libjsonnet.so:
+	cargo build --release -p jsonnet
+
+libjsonnet_test_file: libjsonnet_test_file.c ../target/release/libjsonnet.so
+	gcc -L../target/release/ -ljsonnet libjsonnet_test_file.c -o libjsonnet_test_file
+
+.PHONY: test
+test: libjsonnet_test_file ../target/release/libjsonnet.so
+	export LD_LIBRARY_PATH=../target/release/
+	ldd libjsonnet_test_file
+	./libjsonnet_test_file test.jsonnet
--- /dev/null
+++ b/bindings/jsonnet/Cargo.toml
@@ -0,0 +1,14 @@
+[package]
+name = "jsonnet"
+version = "0.1.0"
+authors = ["Лач <iam@lach.pw>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+jrsonnet-evaluator = { path = "../../crates/jrsonnet-evaluator", version = "1.0.0" }
+libc = "0.2.71"
+
+[lib]
+crate-type = ["cdylib"]
--- /dev/null
+++ b/bindings/jsonnet/README.md
@@ -0,0 +1 @@
+# libjsonnet.so implemented in Rust
--- /dev/null
+++ b/bindings/jsonnet/src/lib.rs
@@ -0,0 +1,226 @@
+use jrsonnet_evaluator::{EvaluationState, ObjValue, Val};
+use libc::{c_char, c_double, c_int, c_uint};
+use std::{
+	ffi::{CStr, CString},
+	path::PathBuf,
+	rc::Rc,
+};
+
+#[no_mangle]
+pub extern "C" fn jsonnet_version() -> &'static [u8; 8] {
+	b"v0.16.0\0"
+}
+
+#[no_mangle]
+pub extern "C" fn jsonnet_make() -> Box<EvaluationState> {
+	Box::new(EvaluationState::default())
+}
+
+// TODO
+#[no_mangle]
+pub extern "C" fn jsonnet_max_stack(_vm: &EvaluationState, _v: c_uint) {}
+
+// jrsonnet currently have no GC, so these functions is no-op
+#[no_mangle]
+pub extern "C" fn jsonnet_gc_min_objects(_vm: &EvaluationState, _v: c_uint) {}
+#[no_mangle]
+pub extern "C" fn jsonnet_gc_growth_trigger(_vm: &EvaluationState, _v: c_double) {}
+
+// TODO
+#[no_mangle]
+pub extern "C" fn jsonnet_string_output(_vm: &EvaluationState, _v: c_int) {}
+
+#[no_mangle]
+pub extern "C" fn jsonnet_json_extract_string(_vm: &EvaluationState, v: &Val) -> *mut c_char {
+	match v.unwrap_if_lazy().unwrap() {
+		Val::Str(s) => CString::new(&*s as &str).unwrap().into_raw(),
+		_ => std::ptr::null_mut(),
+	}
+}
+#[no_mangle]
+pub extern "C" fn jsonnet_json_extract_number(
+	_vm: &EvaluationState,
+	v: &Val,
+	out: &mut c_double,
+) -> c_int {
+	match v.unwrap_if_lazy().unwrap() {
+		Val::Num(n) => {
+			*out = n;
+			1
+		}
+		_ => 0,
+	}
+}
+#[no_mangle]
+pub extern "C" fn jsonnet_json_extract_bool(_vm: &EvaluationState, v: &Val) -> c_int {
+	match v.unwrap_if_lazy().unwrap() {
+		Val::Bool(false) => 0,
+		Val::Bool(true) => 1,
+		_ => 2,
+	}
+}
+#[no_mangle]
+pub extern "C" fn jsonnet_json_extract_null(_vm: &EvaluationState, v: &Val) -> c_int {
+	match v.unwrap_if_lazy().unwrap() {
+		Val::Null => 1,
+		_ => 0,
+	}
+}
+
+/// # Safety
+///
+/// This function is safe, if received v is a pointer to normal C string
+#[no_mangle]
+pub unsafe extern "C" fn jsonnet_json_make_string(
+	_vm: &EvaluationState,
+	v: *const c_char,
+) -> Box<Val> {
+	let cstr = CStr::from_ptr(v);
+	let str = cstr.to_str().unwrap();
+	Box::new(Val::Str(str.into()))
+}
+
+#[no_mangle]
+pub extern "C" fn jsonnet_json_make_number(_vm: &EvaluationState, v: c_double) -> Box<Val> {
+	Box::new(Val::Num(v))
+}
+
+#[no_mangle]
+pub extern "C" fn jsonnet_json_make_bool(_vm: &EvaluationState, v: c_int) -> Box<Val> {
+	assert!(v == 0 || v == 1);
+	Box::new(Val::Bool(v == 1))
+}
+
+#[no_mangle]
+pub extern "C" fn jsonnet_json_make_null(_vm: &EvaluationState) -> Box<Val> {
+	Box::new(Val::Null)
+}
+
+#[no_mangle]
+pub extern "C" fn jsonnet_json_make_array(_vm: &EvaluationState) -> Box<Val> {
+	Box::new(Val::Arr(Rc::new(Vec::new())))
+}
+
+#[no_mangle]
+pub extern "C" fn jsonnet_json_array_append(_vm: &EvaluationState, arr: &mut Val, val: &Val) {
+	match arr {
+		Val::Arr(old) => {
+			let mut new = Vec::new();
+			new.extend(old.iter().cloned());
+			new.push(val.clone());
+			*arr = Val::Arr(Rc::new(new));
+		}
+		_ => panic!("should receive array"),
+	}
+}
+
+#[no_mangle]
+pub extern "C" fn jsonnet_json_make_object(_vm: &EvaluationState) -> Box<Val> {
+	Box::new(Val::Obj(ObjValue::new_empty()))
+}
+
+#[no_mangle]
+pub extern "C" fn jsonnet_json_object_append(
+	_vm: &EvaluationState,
+	_obj: &mut Val,
+	_name: *const c_char,
+	_val: &Val,
+) {
+	todo!()
+}
+
+#[no_mangle]
+pub extern "C" fn jsonnet_realloc(_vm: &EvaluationState, _buf: *const u8, _sz: usize) -> *const u8 {
+	todo!()
+}
+
+#[no_mangle]
+#[allow(clippy::boxed_local)]
+pub extern "C" fn jsonnet_json_destroy(_vm: &EvaluationState, _v: Box<Val>) {}
+
+#[no_mangle]
+pub extern "C" fn jsonnet_import_callback() {
+	todo!()
+}
+#[no_mangle]
+pub extern "C" fn jsonnet_native_callback() {
+	todo!()
+}
+#[no_mangle]
+pub extern "C" fn jsonnet_ext_var() {
+	todo!()
+}
+#[no_mangle]
+pub extern "C" fn jsonnet_ext_code() {
+	todo!()
+}
+#[no_mangle]
+pub extern "C" fn jsonnet_tla_var() {
+	todo!()
+}
+#[no_mangle]
+pub extern "C" fn jsonnet_tla_code() {
+	todo!()
+}
+#[no_mangle]
+pub extern "C" fn jsonnet_max_trace() {
+	todo!()
+}
+#[no_mangle]
+pub extern "C" fn jsonnet_jpath_add() {
+	todo!()
+}
+
+/// # Safety
+///
+/// This function is safe, if received v is a pointer to normal C string
+#[no_mangle]
+pub unsafe extern "C" fn jsonnet_evaluate_file(
+	vm: &EvaluationState,
+	filename: *const c_char,
+	error: &mut c_int,
+) -> *const c_char {
+	vm.run_in_state(|| {
+		use std::fmt::Write;
+		let filename = CStr::from_ptr(filename);
+		match vm.evaluate_file_to_json(&PathBuf::from(filename.to_str().unwrap())) {
+			Ok(v) => {
+				*error = 0;
+				CString::new(&*v as &str).unwrap().into_raw()
+			}
+			Err(e) => {
+				*error = 1;
+				let mut out = String::new();
+				writeln!(out, "{:?}", e.0).unwrap();
+				for i in (e.1).0.iter() {
+					writeln!(out, "{:?}", i).unwrap();
+				}
+				CString::new(&out as &str).unwrap().into_raw()
+			}
+		}
+	})
+}
+#[no_mangle]
+pub extern "C" fn jsonnet_evaluate_snippet() {
+	todo!()
+}
+#[no_mangle]
+pub extern "C" fn jsonnet_evaluate_file_multi() {
+	todo!()
+}
+#[no_mangle]
+pub extern "C" fn jsonnet_evaluate_snippet_multi() {
+	todo!()
+}
+#[no_mangle]
+pub extern "C" fn jsonnet_evaluate_file_stream() {
+	todo!()
+}
+#[no_mangle]
+pub extern "C" fn jsonnet_evaluate_snippet_stream() {
+	todo!()
+}
+
+#[no_mangle]
+#[allow(clippy::boxed_local)]
+pub extern "C" fn jsonnet_destroy(_vm: Box<EvaluationState>) {}
--- /dev/null
+++ b/bindings/libjsonnet.h
@@ -0,0 +1,292 @@
+/*
+Copyright 2015 Google Inc. All rights reserved.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+#ifndef LIB_JSONNET_H
+#define LIB_JSONNET_H
+
+#include <stddef.h>
+
+/** \file This file is a library interface for evaluating Jsonnet.  It is written in C++ but exposes
+ * a C interface for easier wrapping by other languages.  See \see jsonnet_lib_test.c for an example
+ * of using the library.
+ */
+
+/** The version string of th Jsonnet interpreter.
+ *
+ * This is currently grepped out of this file by setup.py, Makefile, and CMakeLists.txt so be aware
+ * of that when making changes.
+ *
+ * If this isn't the sae as jsonnet_version() then you've got a mismatched binary / header.
+ */
+#define LIB_JSONNET_VERSION "v0.16.0"
+
+/** Return the version string of the Jsonnet interpreter.  Conforms to semantic versioning
+ * http://semver.org/ If this does not match LIB_JSONNET_VERSION then there is a mismatch between
+ * header and compiled library.
+ */
+const char *jsonnet_version(void);
+
+/** Jsonnet virtual machine context. */
+struct JsonnetVm;
+
+/** Create a new Jsonnet virtual machine. */
+struct JsonnetVm *jsonnet_make(void);
+
+/** Set the maximum stack depth. */
+void jsonnet_max_stack(struct JsonnetVm *vm, unsigned v);
+
+/** Set the number of objects required before a garbage collection cycle is allowed. */
+void jsonnet_gc_min_objects(struct JsonnetVm *vm, unsigned v);
+
+/** Run the garbage collector after this amount of growth in the number of objects. */
+void jsonnet_gc_growth_trigger(struct JsonnetVm *vm, double v);
+
+/** Expect a string as output and don't JSON encode it. */
+void jsonnet_string_output(struct JsonnetVm *vm, int v);
+
+/** Callback used to load imports.
+ *
+ * The returned char* should be allocated with jsonnet_realloc.  It will be cleaned up by
+ * libjsonnet when no-longer needed.
+ *
+ * \param ctx User pointer, given in jsonnet_import_callback.
+ * \param base The directory containing the code that did the import.
+ * \param rel The path imported by the code.
+ * \param found_here Set this byref param to path to the file, absolute or relative to the
+ *     process's CWD.  This is necessary so that imports from the content of the imported file can
+ *     be resolved correctly.  Allocate memory with jsonnet_realloc.  Only use when *success = 1.
+ * \param success Set this byref param to 1 to indicate success and 0 for failure.
+ * \returns The content of the imported file, or an error message.
+ */
+typedef char *JsonnetImportCallback(void *ctx, const char *base, const char *rel, char **found_here,
+									int *success);
+
+/** An opaque type which can only be utilized via the jsonnet_json_* family of functions.
+ */
+struct JsonnetJsonValue;
+
+/** If the value is a string, return it as UTF8 otherwise return NULL.
+ */
+const char *jsonnet_json_extract_string(struct JsonnetVm *vm, const struct JsonnetJsonValue *v);
+
+/** If the value is a number, return 1 and store the number in out, otherwise return 0.
+ */
+int jsonnet_json_extract_number(struct JsonnetVm *vm, const struct JsonnetJsonValue *v,
+								double *out);
+
+/** Return 0 if the value is false, 1 if it is true, and 2 if it is not a bool.
+ */
+int jsonnet_json_extract_bool(struct JsonnetVm *vm, const struct JsonnetJsonValue *v);
+
+/** Return 1 if the value is null, else 0.
+ */
+int jsonnet_json_extract_null(struct JsonnetVm *vm, const struct JsonnetJsonValue *v);
+
+/** Convert the given UTF8 string to a JsonnetJsonValue.
+ */
+struct JsonnetJsonValue *jsonnet_json_make_string(struct JsonnetVm *vm, const char *v);
+
+/** Convert the given double to a JsonnetJsonValue.
+ */
+struct JsonnetJsonValue *jsonnet_json_make_number(struct JsonnetVm *vm, double v);
+
+/** Convert the given bool (1 or 0) to a JsonnetJsonValue.
+ */
+struct JsonnetJsonValue *jsonnet_json_make_bool(struct JsonnetVm *vm, int v);
+
+/** Make a JsonnetJsonValue representing null.
+ */
+struct JsonnetJsonValue *jsonnet_json_make_null(struct JsonnetVm *vm);
+
+/** Make a JsonnetJsonValue representing an array.
+ *
+ * Assign elements with jsonnet_json_array_append.
+ */
+struct JsonnetJsonValue *jsonnet_json_make_array(struct JsonnetVm *vm);
+
+/** Add v to the end of the array.
+ */
+void jsonnet_json_array_append(struct JsonnetVm *vm, struct JsonnetJsonValue *arr,
+							   struct JsonnetJsonValue *v);
+
+/** Make a JsonnetJsonValue representing an object with the given number of fields.
+ *
+ * Every index of the array must have a unique value assigned with jsonnet_json_array_element.
+ */
+struct JsonnetJsonValue *jsonnet_json_make_object(struct JsonnetVm *vm);
+
+/** Add the field f to the object, bound to v.
+ *
+ * This replaces any previous binding of the field.
+ */
+void jsonnet_json_object_append(struct JsonnetVm *vm, struct JsonnetJsonValue *obj, const char *f,
+								struct JsonnetJsonValue *v);
+
+/** Clean up a JSON subtree.
+ *
+ * This is useful if you want to abort with an error mid-way through building a complex value.
+ */
+void jsonnet_json_destroy(struct JsonnetVm *vm, struct JsonnetJsonValue *v);
+
+/** Callback to provide native extensions to Jsonnet.
+ *
+ * The returned JsonnetJsonValue* should be allocated with jsonnet_realloc.  It will be cleaned up
+ * along with the objects rooted at argv by libjsonnet when no-longer needed.  Return a string upon
+ * failure, which will appear in Jsonnet as an error.  The argv pointer is an array whose size
+ * matches the array of parameters supplied when the native callback was originally registered.
+ *
+ * \param ctx User pointer, given in jsonnet_native_callback.
+ * \param argv Array of arguments from Jsonnet code.
+ * \param success Set this byref param to 1 to indicate success and 0 for failure.
+ * \returns The content of the imported file, or an error message.
+ */
+typedef struct JsonnetJsonValue *JsonnetNativeCallback(void *ctx,
+													   const struct JsonnetJsonValue *const *argv,
+													   int *success);
+
+/** Allocate, resize, or free a buffer.  This will abort if the memory cannot be allocated.  It will
+ * only return NULL if sz was zero.
+ *
+ * \param buf If NULL, allocate a new buffer.  If an previously allocated buffer, resize it.
+ * \param sz The size of the buffer to return.  If zero, frees the buffer.
+ * \returns The new buffer.
+ */
+char *jsonnet_realloc(struct JsonnetVm *vm, char *buf, size_t sz);
+
+/** Override the callback used to locate imports.
+ */
+void jsonnet_import_callback(struct JsonnetVm *vm, JsonnetImportCallback *cb, void *ctx);
+
+/** Register a native extension.
+ *
+ * This will appear in Jsonnet as a function type and can be accessed from std.nativeExt("foo").
+ *
+ * DO NOT register native callbacks with side-effects!  Jsonnet is a lazy functional language and
+ * will call your function when you least expect it, more times than you expect, or not at all.
+ *
+ * \param vm The vm.
+ * \param name The name of the function as visible to Jsonnet code, e.g. "foo".
+ * \param cb The PURE function that implements the behavior you want.
+ * \param ctx User pointer, stash non-global state you need here.
+ * \param params NULL-terminated array of the names of the params.  Must be valid identifiers.
+ */
+void jsonnet_native_callback(struct JsonnetVm *vm, const char *name, JsonnetNativeCallback *cb,
+							 void *ctx, const char *const *params);
+
+/** Bind a Jsonnet external var to the given string.
+ *
+ * Argument values are copied so memory should be managed by caller.
+ */
+void jsonnet_ext_var(struct JsonnetVm *vm, const char *key, const char *val);
+
+/** Bind a Jsonnet external var to the given code.
+ *
+ * Argument values are copied so memory should be managed by caller.
+ */
+void jsonnet_ext_code(struct JsonnetVm *vm, const char *key, const char *val);
+
+/** Bind a string top-level argument for a top-level parameter.
+ *
+ * Argument values are copied so memory should be managed by caller.
+ */
+void jsonnet_tla_var(struct JsonnetVm *vm, const char *key, const char *val);
+
+/** Bind a code top-level argument for a top-level parameter.
+ *
+ * Argument values are copied so memory should be managed by caller.
+ */
+void jsonnet_tla_code(struct JsonnetVm *vm, const char *key, const char *val);
+
+/** Set the number of lines of stack trace to display (0 for all of them). */
+void jsonnet_max_trace(struct JsonnetVm *vm, unsigned v);
+
+/** Add to the default import callback's library search path.
+ *
+ * The search order is last to first, so more recently appended paths take precedence.
+ */
+void jsonnet_jpath_add(struct JsonnetVm *vm, const char *v);
+
+/** Evaluate a file containing Jsonnet code, return a JSON string.
+ *
+ * The returned string should be cleaned up with jsonnet_realloc.
+ *
+ * \param filename Path to a file containing Jsonnet code.
+ * \param error Return by reference whether or not there was an error.
+ * \returns Either JSON or the error message.
+ */
+char *jsonnet_evaluate_file(struct JsonnetVm *vm, const char *filename, int *error);
+
+/** Evaluate a string containing Jsonnet code, return a JSON string.
+ *
+ * The returned string should be cleaned up with jsonnet_realloc.
+ *
+ * \param filename Path to a file (used in error messages).
+ * \param snippet Jsonnet code to execute.
+ * \param error Return by reference whether or not there was an error.
+ * \returns Either JSON or the error message.
+ */
+char *jsonnet_evaluate_snippet(struct JsonnetVm *vm, const char *filename, const char *snippet,
+							   int *error);
+
+/** Evaluate a file containing Jsonnet code, return a number of named JSON files.
+ *
+ * The returned character buffer contains an even number of strings, the filename and JSON for each
+ * JSON file interleaved.  It should be cleaned up with jsonnet_realloc.
+ *
+ * \param filename Path to a file containing Jsonnet code.
+ * \param error Return by reference whether or not there was an error.
+ * \returns Either the error, or a sequence of strings separated by \0, terminated with \0\0.
+ */
+char *jsonnet_evaluate_file_multi(struct JsonnetVm *vm, const char *filename, int *error);
+
+/** Evaluate a string containing Jsonnet code, return a number of named JSON files.
+ *
+ * The returned character buffer contains an even number of strings, the filename and JSON for each
+ * JSON file interleaved.  It should be cleaned up with jsonnet_realloc.
+ *
+ * \param filename Path to a file containing Jsonnet code.
+ * \param snippet Jsonnet code to execute.
+ * \param error Return by reference whether or not there was an error.
+ * \returns Either the error, or a sequence of strings separated by \0, terminated with \0\0.
+ */
+char *jsonnet_evaluate_snippet_multi(struct JsonnetVm *vm, const char *filename,
+									 const char *snippet, int *error);
+
+/** Evaluate a file containing Jsonnet code, return a number of JSON files.
+ *
+ * The returned character buffer contains several strings.  It should be cleaned up with
+ * jsonnet_realloc.
+ *
+ * \param filename Path to a file containing Jsonnet code.
+ * \param error Return by reference whether or not there was an error.
+ * \returns Either the error, or a sequence of strings separated by \0, terminated with \0\0.
+ */
+char *jsonnet_evaluate_file_stream(struct JsonnetVm *vm, const char *filename, int *error);
+
+/** Evaluate a string containing Jsonnet code, return a number of JSON files.
+ *
+ * The returned character buffer contains several strings.  It should be cleaned up with
+ * jsonnet_realloc.
+ *
+ * \param filename Path to a file containing Jsonnet code.
+ * \param snippet Jsonnet code to execute.
+ * \param error Return by reference whether or not there was an error.
+ * \returns Either the error, or a sequence of strings separated by \0, terminated with \0\0.
+ */
+char *jsonnet_evaluate_snippet_stream(struct JsonnetVm *vm, const char *filename,
+									  const char *snippet, int *error);
+
+/** Complement of \see jsonnet_vm_make. */
+void jsonnet_destroy(struct JsonnetVm *vm);
+
+#endif // LIB_JSONNET_H
--- /dev/null
+++ b/bindings/libjsonnet_test_file.c
@@ -0,0 +1,40 @@
+/*
+Copyright 2015 Google Inc. All rights reserved.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "libjsonnet.h"
+
+int main(int argc, const char **argv)
+{
+    int error;
+    char *output;
+    struct JsonnetVm *vm;
+    if (argc != 2) {
+        fprintf(stderr, "libjsonnet_test_file <file>\n");
+        return EXIT_FAILURE;
+    }
+    vm = jsonnet_make();
+    output = jsonnet_evaluate_file(vm, argv[1], &error);
+    if (error) {
+        fprintf(stderr, "%s", output);
+        jsonnet_realloc(vm, output, 0);
+        jsonnet_destroy(vm);
+        return EXIT_FAILURE;
+    }
+    printf("%s", output);
+    jsonnet_realloc(vm, output, 0);
+    jsonnet_destroy(vm);
+    return EXIT_SUCCESS;
+}
--- /dev/null
+++ b/bindings/test.jsonnet
@@ -0,0 +1 @@
+2 + 2

-- 
gitstuff