Merge pull request #18 from sbarzowski/cmd

Basic commandline (so we can start testing compatibility)

.gitignore

@@ -1,2 +1,3 @@
 *~
 .*.swp
+/tests_path.source

jsonnet/cmd.go

@@ -0,0 +1,50 @@
+/*
+Copyright 2017 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.
+*/
+
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+
+	"github.com/google/go-jsonnet"
+)
+
+func usage() {
+	fmt.Println("usage: jsonnet <filename>")
+}
+
+func main() {
+	// TODO(sbarzowski) Be consistent about error codes with C++ maybe
+	vm := jsonnet.MakeVM()
+	if len(os.Args) != 2 {
+		usage()
+		os.Exit(1)
+	}
+	filename := os.Args[1]
+	snippet, err := ioutil.ReadFile(filename)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error reading input file: %v\n", err.Error())
+		os.Exit(1)
+	}
+	json, err := vm.EvaluateSnippet(filename, string(snippet))
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "%v\n", err.Error())
+		os.Exit(2)
+	}
+	fmt.Println(json)
+}

tests.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+source tests_path.source
+export DISABLE_EXT_PARAMS=true
+export DISABLE_LIB_TESTS=true
+export DISABLE_FMT_TESTS=true
+export JSONNET_BIN="$PWD/jsonnet/jsonnet"
+cd "$TESTS_PATH"
+./tests.sh