Add unit test for libjsonnet C API. Move Bazel build targets into BUILD files in respective directories.

Issue #39

Author: davidzchen

BUILD

@@ -0,0 +1,7 @@
+package(default_visibility = ["//visibility:public"])
+
+cc_binary(
+    name = "jsonnet",
+    srcs = ["jsonnet.cpp"],
+    deps = ["//core:libjsonnet"],
+)

cmd/BUILD

@@ -0,0 +1,52 @@
+package(default_visibility = ["//visibility:public"])
+
+cc_library(
+    name = "jsonnet-common",
+    srcs = [
+        "desugarer.cpp",
+        "formatter.cpp",
+        "libjsonnet.cpp",
+        "lexer.cpp",
+        "parser.cpp",
+        "static_analysis.cpp",
+        "string_utils.cpp",
+        "vm.cpp",
+        "//stdlib:std.jsonnet.h",
+    ],
+    hdrs = [
+        "ast.h",
+        "desugarer.h",
+        "formatter.h",
+        "lexer.h",
+        "parser.h",
+        "state.h",
+        "static_analysis.h",
+        "static_error.h",
+        "string_utils.h",
+        "unicode.h",
+        "vm.h",
+    ],
+    deps = [
+        "//include:libjsonnet",
+    ],
+    linkopts = ["-lm"],
+    includes = ["."],
+)
+
+cc_library(
+    name = "libjsonnet",
+    srcs = ["libjsonnet.cpp"],
+    deps = [
+        ":jsonnet-common",
+        "//include:libjsonnet",
+    ],
+)
+
+cc_test(
+    name = "libjsonnet_test",
+    srcs = ["libjsonnet_test.cc"],
+    deps = [
+        ":jsonnet-common",
+        "//external:gtest_main",
+    ],
+)

core/BUILD

@@ -63,7 +63,7 @@ struct JsonnetVm {
 
     FmtOpts fmtOpts;
     bool fmtDebugDesugaring;
-    
+
     JsonnetVm(void)
       : gcGrowthTrigger(2.0), maxStack(500), gcMinObjects(1000), maxTrace(20),
         importCallback(default_import_callback), importCallbackContext(this), stringOutput(false),

core/libjsonnet.cpp

@@ -0,0 +1,30 @@
+// Copyright 2016 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.
+
+extern "C" {
+#include "libjsonnet.h"
+}
+
+#include "gtest/gtest.h"
+
+TEST(JsonnetTest, TestEvaluateSnippet) {
+  const char* snippet = "std.assertEqual(({ x: 1, y: self.x } { x: 2 }).y, 2)";
+  struct JsonnetVm* vm = jsonnet_make();
+  ASSERT_FALSE(vm == nullptr);
+  int error = 0;
+  char* output = jsonnet_evaluate_snippet(vm, "snippet", snippet, &error);
+  EXPECT_EQ(0, error);
+  jsonnet_realloc(vm, output, 0);
+  jsonnet_destroy(vm);
+}

core/libjsonnet_test.cc

@@ -4,10 +4,9 @@ cc_library(
     name = "libjsonnet++",
     srcs = ["libjsonnet++.cc"],
     deps = [
-        "//:libjsonnet",
+        "//core:libjsonnet",
         "//include:libjsonnet++",
     ],
-    includes = ["include"],
 )
 
 cc_test(

cpp/BUILD

@@ -3,9 +3,11 @@ package(default_visibility = ["//visibility:public"])
 cc_library(
     name = "libjsonnet",
     hdrs = ["libjsonnet.h"],
+    includes = ["."],
 )
 
 cc_library(
     name = "libjsonnet++",
     hdrs = ["libjsonnet++.h"],
+    includes = ["."],
 )

include/BUILD

@@ -17,6 +17,8 @@ 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.

include/libjsonnet.h

@@ -0,0 +1,15 @@
+package(default_visibility = ["//visibility:public"])
+
+filegroup(
+    name = "std",
+    srcs = ["std.jsonnet"],
+)
+
+genrule(
+    name = "gen-std-jsonnet-h",
+    srcs = ["std.jsonnet"],
+    outs = ["std.jsonnet.h"],
+    cmd = "((od -v -Anone -t u1 $< | tr \" \" \"\n\" | grep -v \"^$$\" " +
+          "| tr \"\n\" \",\" ) && echo \"0\") > $@; " +
+          "echo >> $@",
+)