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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absl::Status JsonnetMain(std::string in_file, std::string out_file){
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// Initialize sandbox.
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JsonnetBaseSandbox sandbox(in_file, out_file);
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SAPI_RETURN_IF_ERROR(sandbox.Init())
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JsonnetApi api(&sandbox);
// Initialize library's main structure.
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SAPI_ASSIGN_OR_RETURN(JsonnetVm* jsonnet_vm, api.c_jsonnet_make());
sapi::v::RemotePtr vm_pointer(jsonnet_vm);
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// 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_ASSIGN_OR_RETURN(char* input, api.c_read_input(false, in_file_var.PtrBefore()));
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// Process jsonnet data.
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sapi::v::RemotePtr input_pointer(input);
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sapi::v::Int error;
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SAPI_ASSIGN_OR_RETURN(char* output, api.c_jsonnet_evaluate_snippet(
&vm_pointer, in_file_var.PtrBefore(), &input_pointer, error.PtrAfter()));
CHECK(!error.GetValue())
<< "Jsonnet code evaluation failed: "
<< 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());
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sapi::v::RemotePtr output_pointer(output);
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SAPI_ASSIGN_OR_RETURN(bool success, api.c_write_output_file(&output_pointer, out_file_var.PtrBefore()));
CHECK(success) << "Writing to output file failed: " << success;
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// Clean up.
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SAPI_ASSIGN_OR_RETURN(char* result, api.c_jsonnet_realloc(&vm_pointer, &output_pointer, 0));
SAPI_RETURN_IF_ERROR(api.c_jsonnet_destroy(&vm_pointer));
SAPI_RETURN_IF_ERROR(api.c_free_input(&input_pointer));
return absl::OkStatus();
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}
int main(int argc, char* argv[]) {
google::InitGoogleLogging(argv[0]);
gflags::ParseCommandLineFlags(&argc, &argv, true);
if (!(argc == 3)) {
std::cerr << "Usage:\n"
<< basename(argv[0]) << " absolute/path/to/INPUT.jsonnet"
<< " absolute/path/to/OUTPUT\n";
return EXIT_FAILURE;
}
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std::string in_file(argv[1]);
std::string out_file(argv[2]);
absl::Status status = JsonnetMain(in_file, out_file);
if (!status.ok()) {
LOG(ERROR) << "Failed: " << status.ToString();
return EXIT_FAILURE;
}
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return EXIT_SUCCESS;
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}