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multiple files example added

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This commit is contained in:
Katarzyna Miernikiewicz 2020-09-10 10:19:06 +00:00
parent 1b307adf5d
commit 7650657662
9 changed files with 873 additions and 24 deletions
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15
oss-internship-2020/jsonnet/CMakeLists.txt
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@ -21,16 +21,7 @@ set(CMAKE_CXX_STANDARD_REQUIRED True)
add_subdirectory(jsonnet)
add_library(jsonnet_helper STATIC
jsonnet_helper.cc
jsonnet_helper.h
${CMAKE_CURRENT_SOURCE_DIR}/jsonnet/cmd/utils.h
${CMAKE_CURRENT_SOURCE_DIR}/jsonnet/cmd/utils.cpp
)
target_link_libraries(jsonnet_helper
libjsonnet_for_binaries
)
add_subdirectory(examples)
set(SAPI_ROOT "../.." CACHE PATH "Path to the Sandboxed API source tree")
set(SAPI_ENABLE_EXAMPLES OFF CACHE BOOL "")
@ -48,6 +39,8 @@ add_sapi_library(jsonnet_sapi
c_free_input
c_write_output_file
c_jsonnet_realloc
c_jsonnet_evaluate_snippet_multi
c_write_multi_output_files
INPUTS jsonnet_helper.h
LIBRARY jsonnet_helper
LIBRARY_NAME Jsonnet
@ -59,5 +52,3 @@ target_include_directories(jsonnet_sapi INTERFACE
)
target_link_libraries(jsonnet_sapi PUBLIC jsonnet_helper)
add_subdirectory(examples)

11
oss-internship-2020/jsonnet/README.md
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@ -4,7 +4,8 @@ This library provides sandboxed version of the [Jsonnet](https://github.com/goog
## Examples
For now the only example command-line tool `jsonnet_sandboxed` enables the user to evaluate jsonnet code held in one file and writing to one output file. The tool is based on what can be found [here](https://github.com/google/jsonnet/blob/master/cmd/jsonnet.cpp) -- .
The `examples/` directory contains code to produce two command-line tools -- `jsonnet_sandboxed` and `jsonnet_multiple_files_sandboxed`. The first one enables the user to evaluate jsonnet code held in one file and writing to one output file. The other one is for evaluating one jsonnet file into multiple output files.
Both tools are based on what can be found [here](https://github.com/google/jsonnet/blob/master/cmd/jsonnet.cpp).
## Build
@ -26,4 +27,10 @@ cd examples
./jsonnet_sandboxed absolute/path/to/the/input_file.jsonnet \
absolute/path/to/the/output_file
```
For now it supports evaluating one input file (possibly relying on multiple other files, e.x. by jsonnet `import` command; the files must be held in the same directory as input file) into one output file. Example jsonnet codes to evaluate can be found [here](https://github.com/google/jsonnet/tree/master/examples).
To run `jsonnet_mutiple_files_sandboxed`:
```
cd examples
./jsonnet_mutiple_files_sandboxed absolute/path/to/the/input_file.jsonnet \
absolute/path/to/the/output_directory
```
Both tools support evaluating one input file (possibly relying on multiple other files, e.x. by jsonnet `import` command; the files must be held in the same directory as input file) into one or more output files. Example jsonnet codes to evaluate in a one-in-one-out manner can be found [here](https://github.com/google/jsonnet/tree/master/examples). Example code producing multiple output files can be found in the `examples` directory, in a file called `multiple_files_example.jsonnet`.

38
oss-internship-2020/jsonnet/examples/CMakeLists.txt
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@ -12,13 +12,51 @@
# See the License for the specific language governing permissions and
# limitations under the License.
file(MAKE_DIRECTORY "${PROJECT_BINARY_DIR}/gen_files")
file(COPY "${PROJECT_SOURCE_DIR}/jsonnet/cmd/jsonnet.cpp" DESTINATION "${PROJECT_BINARY_DIR}/gen_files/")
file(COPY "${PROJECT_SOURCE_DIR}/jsonnet.patch" DESTINATION "${PROJECT_BINARY_DIR}/gen_files/")
add_custom_command(
OUTPUT ${PROJECT_BINARY_DIR}/gen_files/write_helper.cc
COMMAND cd ${PROJECT_BINARY_DIR}/gen_files && patch < ${PROJECT_SOURCE_DIR}/jsonnet.patch > /dev/null
COMMAND mv ${PROJECT_BINARY_DIR}/gen_files/jsonnet.cpp ${PROJECT_BINARY_DIR}/gen_files/write_helper.cc
)
include_directories(
${PROJECT_SOURCE_DIR}
${PROJECT_BINARY_DIR}/gen_files
)
add_library(jsonnet_helper STATIC
${PROJECT_SOURCE_DIR}/jsonnet_helper.cc
${PROJECT_SOURCE_DIR}/jsonnet_helper.h
${PROJECT_SOURCE_DIR}/jsonnet/cmd/utils.h
${PROJECT_SOURCE_DIR}/jsonnet/cmd/utils.cpp
${PROJECT_BINARY_DIR}/gen_files/write_helper.cc
)
target_link_libraries(jsonnet_helper
libjsonnet_for_binaries
)
add_executable(jsonnet_sandboxed
jsonnet_example.cc
)
add_executable(jsonnet_mutiple_files_sandboxed
jsonnet_multiple_files_example.cc
)
target_link_libraries(jsonnet_sandboxed PRIVATE
libjsonnet
jsonnet_helper
jsonnet_sapi
sapi::sapi
)
target_link_libraries(jsonnet_mutiple_files_sandboxed PRIVATE
libjsonnet
jsonnet_helper
jsonnet_sapi
sapi::sapi
)

15
oss-internship-2020/jsonnet/examples/jsonnet_example.cc
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@ -19,9 +19,6 @@
#include <iostream>
#include "jsonnet_sapi.sapi.h"
#include "sandboxed_api/util/flag.h"
ABSL_DECLARE_FLAG(string, sandbox2_danger_danger_permit_all_and_log);
class JsonnetSapiSandbox : public JsonnetSandbox {
public:
@ -56,9 +53,9 @@ int main(int argc, char *argv[]) {
google::InitGoogleLogging(argv[0]);
gflags::ParseCommandLineFlags(&argc, &argv, true);
if (argc != 3) {
std::cerr << "Usage: " << basename(argv[0])
<< " absolute/path/to/INPUT.jsonnet"
if (!(argc == 3)) {
std::cerr << "Usage:\n"
<< basename(argv[0]) << " absolute/path/to/INPUT.jsonnet"
<< " absolute/path/to/OUTPUT\n";
return EXIT_FAILURE;
}
@ -103,8 +100,10 @@ int main(int argc, char *argv[]) {
basename(&out_file[0]));
sapi::v::ConstCStr out_file_var(out_file_in_sandboxee.c_str());
sapi::v::RemotePtr output_pointer(output.value());
sapi::StatusOr<bool> success =
api.c_write_output_file(&output_pointer, out_file_var.PtrBefore());
sapi::StatusOr<bool> success;
success = api.c_write_output_file(&output_pointer, out_file_var.PtrBefore());
CHECK(success.ok() && success.value())
<< "Writing to output file failed " << success.status() << " "
<< success.value();

119
oss-internship-2020/jsonnet/examples/jsonnet_multiple_files_example.cc Normal file
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@ -0,0 +1,119 @@
// 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 <libgen.h>
#include <syscall.h>
#include <cstdlib>
#include <iostream>
#include "jsonnet_sapi.sapi.h"
#include "sandboxed_api/sandbox2/util/path.h"
class JsonnetSapiSandbox : public JsonnetSandbox {
public:
explicit JsonnetSapiSandbox(std::string in_file, std::string out_file)
: in_file_(std::move(in_file)), out_file_(std::move(out_file)) {}
std::unique_ptr<sandbox2::Policy> ModifyPolicy(
sandbox2::PolicyBuilder *) override {
return sandbox2::PolicyBuilder()
.AllowStaticStartup()
.AllowOpen()
.AllowRead()
.AllowWrite()
.AllowStat()
.AllowSystemMalloc()
.AllowExit()
.AllowSyscalls({
__NR_futex,
__NR_close,
})
.AddDirectoryAt(sandbox2::file::CleanPath(&out_file_[0]), "/output",
/*is_ro=*/false)
.AddDirectoryAt(dirname(&in_file_[0]), "/input", true)
.BuildOrDie();
}
private:
std::string in_file_;
std::string out_file_;
};
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_DIRECTORY\n";
return EXIT_FAILURE;
}
std::string in_file(argv[1]);
std::string out_directory(argv[2]);
// Initialize sandbox.
JsonnetSapiSandbox sandbox(in_file, out_directory);
absl::Status status = sandbox.Init();
CHECK(status.ok()) << "Sandbox initialization failed " << status;
JsonnetApi api(&sandbox);
// Initialize library's main structure.
sapi::StatusOr<JsonnetVm *> jsonnet_vm = api.c_jsonnet_make();
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());
sapi::StatusOr<char *> input =
api.c_read_input(false, in_file_var.PtrBefore());
CHECK(input.ok()) << "Reading input file failed " << input.status();
// Process jsonnet data.
sapi::v::RemotePtr input_pointer(input.value());
sapi::v::Int error;
sapi::StatusOr<char *> output = api.c_jsonnet_evaluate_snippet_multi(
&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 "
"directory as your file";
// Write data to file.
std::string out_file_in_sandboxee(std::string("/output/"));
sapi::v::ConstCStr out_file_var(out_file_in_sandboxee.c_str());
sapi::v::RemotePtr output_pointer(output.value());
sapi::StatusOr<bool> success = api.c_write_multi_output_files(
&vm_pointer, &output_pointer, out_file_var.PtrBefore());
CHECK(success.ok() && success.value())
<< "Writing to output file failed " << success.status() << " "
<< success.value();
// Clean up.
status = api.c_jsonnet_destroy(&vm_pointer);
CHECK(status.ok()) << "JsonnetVm destroy failed: " << status;
status = api.c_free_input(&input_pointer);
CHECK(status.ok()) << "Input freeing failed: " << status;
return EXIT_SUCCESS;
}

12
oss-internship-2020/jsonnet/examples/multiple_files_example.jsonnet Normal file
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@ -0,0 +1,12 @@
// This is a jsonnet code which evaluates to mutliple output files.
{
"first_file.json": {
name: 'This is the first file created by the multiple-files example code.',
caption: 'The other one\'s name is -> ' + $["second_file.json"].name,
},
"second_file.json": {
name: 'And that is the other one.',
caption: 'If it was the first one, variable name would hold what\'s in <first_name> variable.',
first_name: $["first_file.json"].name,
},
}

668
oss-internship-2020/jsonnet/jsonnet.patch Normal file
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@ -0,0 +1,668 @@
--- jsonnet.cpp 2020-09-09 12:15:33.687539042 +0000
+++ write_helper.cpp 2020-09-09 14:45:55.176665636 +0000
@@ -14,559 +14,126 @@
limitations under the License.
*/
-#include <cassert>
-#include <cstdlib>
-#include <cstring>
+// We need two functions defined in jsonnet.cpp file, used for writing output
+// (multiple files and yaml streams) -- with minor changes (e.x. return type).
-#include <exception>
#include <fstream>
#include <iostream>
-#include <list>
#include <map>
-#include <sstream>
-#include <string>
#include <vector>
-#include "utils.h"
+#include "jsonnet_helper.h"
-extern "C" {
-#include <libjsonnet.h>
-}
-
-#ifdef _WIN32
-const char PATH_SEP = ';';
-#else
-const char PATH_SEP = ':';
-#endif
-
-void version(std::ostream &o)
-{
- o << "Jsonnet commandline interpreter " << jsonnet_version() << std::endl;
-}
-
-void usage(std::ostream &o)
-{
- version(o);
- o << "\n";
- o << "jsonnet {<option>} <filename>\n";
- o << "\n";
- o << "Available options:\n";
- o << " -h / --help This message\n";
- o << " -e / --exec Treat filename as code\n";
- o << " -J / --jpath <dir> Specify an additional library search dir (right-most wins)\n";
- o << " -o / --output-file <file> Write to the output file rather than stdout\n";
- o << " -m / --multi <dir> Write multiple files to the directory, list files on stdout\n";
- o << " -y / --yaml-stream Write output as a YAML stream of JSON documents\n";
- o << " -S / --string Expect a string, manifest as plain text\n";
- o << " -s / --max-stack <n> Number of allowed stack frames\n";
- o << " -t / --max-trace <n> Max length of stack trace before cropping\n";
- o << " --gc-min-objects <n> Do not run garbage collector until this many\n";
- o << " --gc-growth-trigger <n> Run garbage collector after this amount of object growth\n";
- o << " --version Print version\n";
- o << "Available options for specifying values of 'external' variables:\n";
- o << "Provide the value as a string:\n";
- o << " -V / --ext-str <var>[=<val>] If <val> is omitted, get from environment var <var>\n";
- o << " --ext-str-file <var>=<file> Read the string from the file\n";
- o << "Provide a value as Jsonnet code:\n";
- o << " --ext-code <var>[=<code>] If <code> is omitted, get from environment var <var>\n";
- o << " --ext-code-file <var>=<file> Read the code from the file\n";
- o << "Available options for specifying values of 'top-level arguments':\n";
- o << "Provide the value as a string:\n";
- o << " -A / --tla-str <var>[=<val>] If <val> is omitted, get from environment var <var>\n";
- o << " --tla-str-file <var>=<file> Read the string from the file\n";
- o << "Provide a value as Jsonnet code:\n";
- o << " --tla-code <var>[=<code>] If <code> is omitted, get from environment var <var>\n";
- o << " --tla-code-file <var>=<file> Read the code from the file\n";
- o << "Environment variables:\n";
- o << "JSONNET_PATH is a colon (semicolon on Windows) separated list of directories added\n";
- o << "in reverse order before the paths specified by --jpath (i.e. left-most wins)\n";
- o << "E.g. JSONNET_PATH=a:b jsonnet -J c -J d is equivalent to:\n";
- o << "JSONNET_PATH=d:c:a:b jsonnet\n";
- o << "jsonnet -J b -J a -J c -J d\n";
- o << "\n";
- o << "In all cases:\n";
- o << "<filename> can be - (stdin)\n";
- o << "Multichar options are expanded e.g. -abc becomes -a -b -c.\n";
- o << "The -- option suppresses option processing for subsequent arguments.\n";
- o << "Note that since filenames and jsonnet programs can begin with -, it is advised to\n";
- o << "use -- if the argument is unknown, e.g. jsonnet -- \"$FILENAME\".";
- o << std::endl;
-}
-
-/** Class for representing configuration read from command line flags. */
-struct JsonnetConfig {
- std::vector<std::string> inputFiles;
- std::string outputFile;
- bool filenameIsCode;
-
- // EVAL flags
- bool evalMulti;
- bool evalStream;
- std::string evalMultiOutputDir;
-
- JsonnetConfig()
- : filenameIsCode(false),
- evalMulti(false),
- evalStream(false)
+/** Writes output files for multiple file output */
+bool write_multi_output_files(JsonnetVm *vm, char *output,
+ const std::string &output_dir) {
+ // If multiple file output is used, then iterate over each string from
+ // the sequence of strings returned by jsonnet_evaluate_snippet_multi,
+ // construct pairs of filename and content, and write each output file.
+ std::map<std::string, std::string> r;
+ for (const char *c = output; *c != '\0';) {
+ const char *filename = c;
+ const char *c2 = c;
+ while (*c2 != '\0') ++c2;
+ ++c2;
+ const char *json = c2;
+ while (*c2 != '\0') ++c2;
+ ++c2;
+ c = c2;
+ r[filename] = json;
+ }
+ jsonnet_realloc(vm, output, 0);
+
+ std::ostream *o;
+ std::ofstream f;
+
+ o = &std::cout;
+
+ for (const auto &pair : r) {
+ const std::string &new_content = pair.second;
+ const std::string &filename = output_dir + pair.first;
+ (*o) << filename << std::endl;
{
- }
-};
-
-bool get_var_val(const std::string &var_val, std::string &var, std::string &val)
-{
- size_t eq_pos = var_val.find_first_of('=', 0);
- if (eq_pos == std::string::npos) {
- var = var_val;
- const char *val_cstr = ::getenv(var.c_str());
- if (val_cstr == nullptr) {
- std::cerr << "ERROR: environment variable " << var << " was undefined." << std::endl;
- return false;
+ std::ifstream exists(filename.c_str());
+ if (exists.good()) {
+ std::string existing_content;
+ existing_content.assign(std::istreambuf_iterator<char>(exists),
+ std::istreambuf_iterator<char>());
+ if (existing_content == new_content) {
+ // Do not bump the timestamp on the file if its content is
+ // the same. This may trigger other tools (e.g. make) to do
+ // unnecessary work.
+ continue;
}
- val = val_cstr;
- } else {
- var = var_val.substr(0, eq_pos);
- val = var_val.substr(eq_pos + 1, std::string::npos);
- }
- return true;
-}
-
-bool get_var_file(const std::string &var_file, const std::string &imp, std::string &var, std::string &val)
-{
- size_t eq_pos = var_file.find_first_of('=', 0);
- if (eq_pos == std::string::npos) {
- std::cerr << "ERROR: argument not in form <var>=<file> \"" << var_file << "\"."
- << std::endl;
- return false;
+ }
}
- var = var_file.substr(0, eq_pos);
- const std::string path = var_file.substr(eq_pos + 1, std::string::npos);
-
- size_t b, e;
- val.erase().append(imp).append(" @'");
- // duplicate all the single quotes in @path to make a quoted string
- for (b = 0; (e = path.find("'", b)) != std::string::npos; b = e + 1) {
- val.append(path.substr(b, e - b + 1)).push_back('\'');
- }
- val.append(path.substr(b)).push_back('\'');
-
- return true;
-}
-
-enum ArgStatus {
- ARG_CONTINUE,
- ARG_SUCCESS,
- ARG_FAILURE,
-};
-
-/** Parse the command line arguments, configuring the Jsonnet VM context and
- * populating the JsonnetConfig.
- */
-static ArgStatus process_args(int argc, const char **argv, JsonnetConfig *config, JsonnetVm *vm)
-{
- auto args = simplify_args(argc, argv);
- std::vector<std::string> remaining_args;
-
- unsigned i = 0;
-
- for (; i < args.size(); ++i) {
- const std::string &arg = args[i];
- if (arg == "-h" || arg == "--help") {
- usage(std::cout);
- return ARG_SUCCESS;
- } else if (arg == "-v" || arg == "--version") {
- version(std::cout);
- return ARG_SUCCESS;
- } else if (arg == "-e" || arg == "--exec") {
- config->filenameIsCode = true;
- } else if (arg == "-o" || arg == "--output-file") {
- std::string output_file = next_arg(i, args);
- if (output_file.length() == 0) {
- std::cerr << "ERROR: -o argument was empty string" << std::endl;
- return ARG_FAILURE;
- }
- config->outputFile = output_file;
- } else if (arg == "--") {
- // All subsequent args are not options.
- while ((++i) < args.size())
- remaining_args.push_back(args[i]);
- break;
- } else if (arg == "-s" || arg == "--max-stack") {
- long l = strtol_check(next_arg(i, args));
- if (l < 1) {
- std::cerr << "ERROR: invalid --max-stack value: " << l << std::endl;
- return ARG_FAILURE;
- }
- jsonnet_max_stack(vm, l);
- } else if (arg == "-J" || arg == "--jpath") {
- std::string dir = next_arg(i, args);
- if (dir.length() == 0) {
- std::cerr << "ERROR: -J argument was empty string" << std::endl;
- return ARG_FAILURE;
- }
- if (dir[dir.length() - 1] != '/') {
- dir += '/';
- }
- jsonnet_jpath_add(vm, dir.c_str());
- } else if (arg == "-V" || arg == "--ext-str") {
- std::string var, val;
- if (!get_var_val(next_arg(i, args), var, val))
- return ARG_FAILURE;
- jsonnet_ext_var(vm, var.c_str(), val.c_str());
- } else if (arg == "-E" || arg == "--var" || arg == "--env") {
- // TODO(dcunnin): Delete this in a future release.
- std::cerr << "WARNING: jsonnet eval -E, --var and --env are deprecated,"
- << " please use -V or --ext-str." << std::endl;
- std::string var, val;
- if (!get_var_val(next_arg(i, args), var, val))
- return ARG_FAILURE;
- jsonnet_ext_var(vm, var.c_str(), val.c_str());
- } else if (arg == "--ext-str-file") {
- std::string var, val;
- if (!get_var_file(next_arg(i, args), "importstr", var, val))
- return ARG_FAILURE;
- jsonnet_ext_code(vm, var.c_str(), val.c_str());
- } else if (arg == "-F" || arg == "--file") {
- // TODO(dcunnin): Delete this in a future release.
- std::cerr << "WARNING: jsonnet eval -F and --file are deprecated,"
- << " please use --ext-str-file." << std::endl;
- std::string var, val;
- if (!get_var_file(next_arg(i, args), "importstr", var, val))
- return ARG_FAILURE;
- jsonnet_ext_code(vm, var.c_str(), val.c_str());
- } else if (arg == "--ext-code") {
- std::string var, val;
- if (!get_var_val(next_arg(i, args), var, val))
- return ARG_FAILURE;
- jsonnet_ext_code(vm, var.c_str(), val.c_str());
- } else if (arg == "--code-var" || arg == "--code-env") {
- // TODO(dcunnin): Delete this in a future release.
- std::cerr << "WARNING: jsonnet eval --code-var and --code-env are deprecated,"
- << " please use --ext-code." << std::endl;
- std::string var, val;
- if (!get_var_val(next_arg(i, args), var, val))
- return ARG_FAILURE;
- jsonnet_ext_code(vm, var.c_str(), val.c_str());
- } else if (arg == "--ext-code-file") {
- std::string var, val;
- if (!get_var_file(next_arg(i, args), "import", var, val))
- return ARG_FAILURE;
- jsonnet_ext_code(vm, var.c_str(), val.c_str());
- } else if (arg == "--code-file") {
- // TODO(dcunnin): Delete this in a future release.
- std::cerr << "WARNING: jsonnet eval --code-file is deprecated,"
- << " please use --ext-code-file." << std::endl;
- std::string var, val;
- if (!get_var_file(next_arg(i, args), "import", var, val))
- return ARG_FAILURE;
- jsonnet_ext_code(vm, var.c_str(), val.c_str());
- } else if (arg == "-A" || arg == "--tla-str") {
- std::string var, val;
- if (!get_var_val(next_arg(i, args), var, val))
- return ARG_FAILURE;
- jsonnet_tla_var(vm, var.c_str(), val.c_str());
- } else if (arg == "--tla-str-file") {
- std::string var, val;
- if (!get_var_file(next_arg(i, args), "importstr", var, val))
- return ARG_FAILURE;
- jsonnet_tla_code(vm, var.c_str(), val.c_str());
- } else if (arg == "--tla-code") {
- std::string var, val;
- if (!get_var_val(next_arg(i, args), var, val))
- return ARG_FAILURE;
- jsonnet_tla_code(vm, var.c_str(), val.c_str());
- } else if (arg == "--tla-code-file") {
- std::string var, val;
- if (!get_var_file(next_arg(i, args), "import", var, val))
- return ARG_FAILURE;
- jsonnet_tla_code(vm, var.c_str(), val.c_str());
-
- } else if (arg == "--gc-min-objects") {
- long l = strtol_check(next_arg(i, args));
- if (l < 0) {
- std::cerr << "ERROR: invalid --gc-min-objects value: " << l << std::endl;
- return ARG_FAILURE;
- }
- jsonnet_gc_min_objects(vm, l);
- } else if (arg == "-t" || arg == "--max-trace") {
- long l = strtol_check(next_arg(i, args));
- if (l < 0) {
- std::cerr << "ERROR: invalid --max-trace value: " << l << std::endl;
- return ARG_FAILURE;
- }
- jsonnet_max_trace(vm, l);
- } else if (arg == "--gc-growth-trigger") {
- std::string num = next_arg(i, args);
- char *ep;
- double v = std::strtod(num.c_str(), &ep);
- if (*ep != '\0' || num.length() == 0) {
- std::cerr << "ERROR: invalid number \"" << num << "\"" << std::endl;
- return ARG_FAILURE;
- }
- if (v < 0) {
- std::cerr << "ERROR: invalid --gc-growth-trigger \"" << num << "\""
- << std::endl;
- return ARG_FAILURE;
- }
- jsonnet_gc_growth_trigger(vm, v);
- } else if (arg == "-m" || arg == "--multi") {
- config->evalMulti = true;
- std::string output_dir = next_arg(i, args);
- if (output_dir.length() == 0) {
- std::cerr << "ERROR: -m argument was empty string" << std::endl;
- return ARG_FAILURE;
- }
- if (output_dir[output_dir.length() - 1] != '/') {
- output_dir += '/';
- }
- config->evalMultiOutputDir = output_dir;
- } else if (arg == "-y" || arg == "--yaml-stream") {
- config->evalStream = true;
- } else if (arg == "-S" || arg == "--string") {
- jsonnet_string_output(vm, 1);
- } else if (arg.length() > 1 && arg[0] == '-') {
- std::cerr << "ERROR: unrecognized argument: " << arg << std::endl;
- return ARG_FAILURE;
- } else {
- remaining_args.push_back(args[i]);
- }
- }
-
- const char *want = config->filenameIsCode ? "code" : "filename";
- if (remaining_args.size() == 0) {
- std::cerr << "ERROR: must give " << want << "\n" << std::endl;
- usage(std::cerr);
- return ARG_FAILURE;
- }
-
- if (remaining_args.size() > 1) {
- std::string filename = remaining_args[0];
- std::cerr << "ERROR: only one " << want << " is allowed\n" << std::endl;
- return ARG_FAILURE;
- }
- config->inputFiles = remaining_args;
- return ARG_CONTINUE;
-}
-
-/** Writes output files for multiple file output */
-static bool write_multi_output_files(JsonnetVm *vm, char *output, const std::string &output_dir,
- const std::string &output_file)
-{
- // If multiple file output is used, then iterate over each string from
- // the sequence of strings returned by jsonnet_evaluate_snippet_multi,
- // construct pairs of filename and content, and write each output file.
- std::map<std::string, std::string> r;
- for (const char *c = output; *c != '\0';) {
- const char *filename = c;
- const char *c2 = c;
- while (*c2 != '\0')
- ++c2;
- ++c2;
- const char *json = c2;
- while (*c2 != '\0')
- ++c2;
- ++c2;
- c = c2;
- r[filename] = json;
- }
- jsonnet_realloc(vm, output, 0);
-
- std::ostream *o;
std::ofstream f;
-
- if (output_file.empty()) {
- o = &std::cout;
- } else {
- f.open(output_file.c_str());
- if (!f.good()) {
- std::string msg = "Writing to output file: " + output_file;
- perror(msg.c_str());
- return false;
- }
- o = &f;
- }
-
- for (const auto &pair : r) {
- const std::string &new_content = pair.second;
- const std::string &filename = output_dir + pair.first;
- (*o) << filename << std::endl;
- {
- std::ifstream exists(filename.c_str());
- if (exists.good()) {
- std::string existing_content;
- existing_content.assign(std::istreambuf_iterator<char>(exists),
- std::istreambuf_iterator<char>());
- if (existing_content == new_content) {
- // Do not bump the timestamp on the file if its content is
- // the same. This may trigger other tools (e.g. make) to do
- // unnecessary work.
- continue;
- }
- }
- }
- std::ofstream f;
- f.open(filename.c_str());
- if (!f.good()) {
- std::string msg = "Opening output file: " + filename;
- perror(msg.c_str());
- return false;
- }
- f << new_content;
- f.close();
- if (!f.good()) {
- std::string msg = "Writing to output file: " + filename;
- perror(msg.c_str());
- return false;
- }
- }
-
- if (output_file.empty()) {
- std::cout.flush();
- } else {
- f.close();
- if (!f.good()) {
- std::string msg = "Writing to output file: " + output_file;
- perror(msg.c_str());
- return false;
- }
- }
- return true;
+ f.open(filename.c_str());
+ if (!f.good()) {
+ std::string msg = "Opening output file: " + filename;
+ perror(msg.c_str());
+ return false;
+ }
+ f << new_content;
+ f.close();
+ if (!f.good()) {
+ std::string msg = "Writing to output file: " + filename;
+ perror(msg.c_str());
+ return false;
+ }
+ }
+
+ std::cout.flush();
+
+ return true;
}
/** Writes output files for YAML stream output */
-static bool write_output_stream(JsonnetVm *vm, char *output, const std::string &output_file)
-{
- std::ostream *o;
- std::ofstream f;
-
- if (output_file.empty()) {
- o = &std::cout;
- } else {
- f.open(output_file.c_str());
- if (!f.good()) {
- std::string msg = "Writing to output file: " + output_file;
- perror(msg.c_str());
- return false;
- }
- o = &f;
- }
-
- // If YAML stream output is used, then iterate over each string from
- // the sequence of strings returned by jsonnet_evaluate_snippet_stream,
- // and add the --- and ... as defined by the YAML spec.
- std::vector<std::string> r;
- for (const char *c = output; *c != '\0';) {
- const char *json = c;
- while (*c != '\0')
- ++c;
- ++c;
- r.emplace_back(json);
- }
- jsonnet_realloc(vm, output, 0);
- for (const auto &str : r) {
- (*o) << "---\n";
- (*o) << str;
- }
- if (r.size() > 0)
- (*o) << "...\n";
- o->flush();
-
- if (output_file.empty()) {
- std::cout.flush();
- } else {
- f.close();
- if (!f.good()) {
- std::string msg = "Writing to output file: " + output_file;
- perror(msg.c_str());
- return false;
- }
+static bool write_output_stream(JsonnetVm *vm, char *output,
+ const std::string &output_file) {
+ std::ostream *o;
+ std::ofstream f;
+
+ if (output_file.empty()) {
+ o = &std::cout;
+ } else {
+ f.open(output_file.c_str());
+ if (!f.good()) {
+ std::string msg = "Writing to output file: " + output_file;
+ perror(msg.c_str());
+ return false;
+ }
+ o = &f;
+ }
+
+ // If YAML stream output is used, then iterate over each string from
+ // the sequence of strings returned by jsonnet_evaluate_snippet_stream,
+ // and add the --- and ... as defined by the YAML spec.
+ std::vector<std::string> r;
+ for (const char *c = output; *c != '\0';) {
+ const char *json = c;
+ while (*c != '\0') ++c;
+ ++c;
+ r.emplace_back(json);
+ }
+ jsonnet_realloc(vm, output, 0);
+ for (const auto &str : r) {
+ (*o) << "---\n";
+ (*o) << str;
+ }
+ if (r.size() > 0) (*o) << "...\n";
+ o->flush();
+
+ if (output_file.empty()) {
+ std::cout.flush();
+ } else {
+ f.close();
+ if (!f.good()) {
+ std::string msg = "Writing to output file: " + output_file;
+ perror(msg.c_str());
+ return false;
}
+ }
- return true;
-}
-
-int main(int argc, const char **argv)
-{
- try {
- JsonnetVm *vm = jsonnet_make();
- JsonnetConfig config;
- if (const char *jsonnet_path_env = getenv("JSONNET_PATH")) {
- std::list<std::string> jpath;
- std::istringstream iss(jsonnet_path_env);
- std::string path;
- while (std::getline(iss, path, PATH_SEP)) {
- jpath.push_front(path);
- }
- for (const std::string &path : jpath) {
- jsonnet_jpath_add(vm, path.c_str());
- }
- }
- ArgStatus arg_status = process_args(argc, argv, &config, vm);
- if (arg_status != ARG_CONTINUE) {
- jsonnet_destroy(vm);
- return arg_status == ARG_SUCCESS ? EXIT_SUCCESS : EXIT_FAILURE;
- }
-
- // Evaluate input Jsonnet and handle any errors from Jsonnet VM.
- int error;
- char *output;
- assert(config.inputFiles.size() == 1);
-
- // Read input file.
- std::string input;
- if (!read_input(config.filenameIsCode, &config.inputFiles[0], &input)) {
- jsonnet_destroy(vm);
- return EXIT_FAILURE;
- }
-
- if (config.evalMulti) {
- output = jsonnet_evaluate_snippet_multi(
- vm, config.inputFiles[0].c_str(), input.c_str(), &error);
- } else if (config.evalStream) {
- output = jsonnet_evaluate_snippet_stream(
- vm, config.inputFiles[0].c_str(), input.c_str(), &error);
- } else {
- output = jsonnet_evaluate_snippet(
- vm, config.inputFiles[0].c_str(), input.c_str(), &error);
- }
-
- if (error) {
- std::cerr << output;
- jsonnet_realloc(vm, output, 0);
- jsonnet_destroy(vm);
- return EXIT_FAILURE;
- }
-
- // Write output JSON.
- if (config.evalMulti) {
- if (!write_multi_output_files(
- vm, output, config.evalMultiOutputDir, config.outputFile)) {
- jsonnet_destroy(vm);
- return EXIT_FAILURE;
- }
- } else if (config.evalStream) {
- if (!write_output_stream(vm, output, config.outputFile)) {
- jsonnet_destroy(vm);
- return EXIT_FAILURE;
- }
- } else {
- bool successful = write_output_file(output, config.outputFile);
- jsonnet_realloc(vm, output, 0);
- if (!successful) {
- jsonnet_destroy(vm);
- return EXIT_FAILURE;
- }
- }
-
- jsonnet_destroy(vm);
- return EXIT_SUCCESS;
-
- } catch (const std::bad_alloc &) {
- // Avoid further allocation attempts
- fputs("Internal out-of-memory error (please report this)\n", stderr);
- } catch (const std::exception &e) {
- std::cerr << "Internal error (please report this): " << e.what() << std::endl;
- } catch (...) {
- std::cerr << "An unknown exception occurred (please report this)." << std::endl;
- }
- return EXIT_FAILURE;
+ return true;
}

9
oss-internship-2020/jsonnet/jsonnet_helper.cc
View File

@ -27,6 +27,10 @@ char* c_jsonnet_evaluate_snippet(struct JsonnetVm* vm, const char* filename,
return jsonnet_evaluate_snippet(vm, filename, snippet, error);
}
char* c_jsonnet_evaluate_snippet_multi(struct JsonnetVm *vm, const char *filename, const char *snippet, int *error) {
return jsonnet_evaluate_snippet_multi(vm, filename, snippet, error);
}
char* c_read_input(bool filename_is_code, const char* filename) {
std::string s_filename(filename);
std::string s_input;
@ -46,6 +50,11 @@ bool c_write_output_file(const char* output, const char* output_file) {
return write_output_file(output, s_output_file);
}
bool c_write_multi_output_files(JsonnetVm *vm, char *output, char* output_dir) {
std::string s_output_dir(output_dir);
return write_multi_output_files(vm, output, s_output_dir);
}
char* c_jsonnet_realloc(JsonnetVm* vm, char* str, size_t sz) {
return jsonnet_realloc(vm, str, sz);
}

6
oss-internship-2020/jsonnet/jsonnet_helper.h
View File

@ -26,6 +26,8 @@ extern "C" char* c_jsonnet_evaluate_snippet(struct JsonnetVm* vm,
const char* filename, char* snippet,
int* error);
extern "C" char* c_jsonnet_evaluate_snippet_multi(struct JsonnetVm *vm, const char *filename, const char *snippet, int *error);
extern "C" char* c_read_input(bool filename_is_code, const char* filename);
extern "C" void c_free_input(char* input);
@ -34,3 +36,7 @@ extern "C" bool c_write_output_file(const char* output,
const char* output_file);
extern "C" char* c_jsonnet_realloc(JsonnetVm* vm, char* str, size_t sz);
extern "C" bool c_write_multi_output_files(JsonnetVm *vm, char *output, char* output_dir);
bool write_multi_output_files(JsonnetVm *vm, char *output, const std::string &output_dir);