sandboxed-api/oss-internship-2020/jsonnet/examples/jsonnet_base_example.cc

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// Copyright 2020 Google LLC
//
// 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 <cstdlib>
#include <iostream>
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#include "jsonnet_base_sandbox.h"
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int main(int argc, char* argv[]) {
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google::InitGoogleLogging(argv[0]);
gflags::ParseCommandLineFlags(&argc, &argv, true);
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if (!(argc == 3)) {
std::cerr << "Usage:\n"
<< basename(argv[0]) << " absolute/path/to/INPUT.jsonnet"
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<< " absolute/path/to/OUTPUT\n";
return EXIT_FAILURE;
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}
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std::string in_file(argv[1]);
std::string out_file(argv[2]);
// Initialize sandbox.
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JsonnetBaseSandbox sandbox(in_file, out_file);
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absl::Status status = sandbox.Init();
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CHECK(status.ok()) << "Sandbox initialization failed: " << status;
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JsonnetApi api(&sandbox);
// Initialize library's main structure.
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sapi::StatusOr<JsonnetVm*> jsonnet_vm = api.c_jsonnet_make();
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sapi::v::RemotePtr vm_pointer(jsonnet_vm.value());
CHECK(jsonnet_vm.ok()) << "JsonnetVm initialization failed: "
<< jsonnet_vm.status();
// Read input file.
std::string in_file_in_sandboxee(std::string("/input/") +
basename(&in_file[0]));
sapi::v::ConstCStr in_file_var(in_file_in_sandboxee.c_str());
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sapi::StatusOr<char*> input =
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api.c_read_input(false, in_file_var.PtrBefore());
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CHECK(input.ok()) << "Reading input file failed: " << input.status();
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// Process jsonnet data.
sapi::v::RemotePtr input_pointer(input.value());
sapi::v::Int error;
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sapi::StatusOr<char*> output = api.c_jsonnet_evaluate_snippet(
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&vm_pointer, in_file_var.PtrBefore(), &input_pointer, error.PtrAfter());
CHECK(output.ok() && !error.GetValue())
<< "Jsonnet code evaluation failed: " << output.status() << " "
<< error.GetValue() << "\n"
<< "Make sure all files used by your jsonnet file are in the same "
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"directory as your file.";
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// Write data to file.
std::string out_file_in_sandboxee(std::string("/output/") +
basename(&out_file[0]));
sapi::v::ConstCStr out_file_var(out_file_in_sandboxee.c_str());
sapi::v::RemotePtr output_pointer(output.value());
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sapi::StatusOr<bool> success;
success = api.c_write_output_file(&output_pointer, out_file_var.PtrBefore());
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CHECK(success.ok() && success.value())
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<< "Writing to output file failed: " << success.status() << " "
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<< success.value();
// Clean up.
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sapi::StatusOr<char*> result =
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api.c_jsonnet_realloc(&vm_pointer, &output_pointer, 0);
CHECK(result.ok()) << "JsonnetVm realloc failed: " << result.status();
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status = api.c_jsonnet_destroy(&vm_pointer);
CHECK(status.ok()) << "JsonnetVm destroy failed: " << status;
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status = api.c_free_input(&input_pointer);
CHECK(status.ok()) << "Input freeing failed: " << status;
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return EXIT_SUCCESS;
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}