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// Copyright 2011 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.
#include "msvc_helper.h"
#include <fcntl.h>
#include <io.h>
#include <stdio.h>
#include <windows.h>
#include "clparser.h"
#include "util.h"
#include "getopt.h"
namespace {
void Usage() {
printf(
"usage: ninja -t msvc [options] -- cl.exe /showIncludes /otherArgs\n"
"options:\n"
" -e ENVFILE load environment block from ENVFILE as environment\n"
" -o FILE write output dependency information to FILE.d\n"
" -p STRING localized prefix of msvc's /showIncludes output\n"
);
}
void PushPathIntoEnvironment(const string& env_block) {
const char* as_str = env_block.c_str();
while (as_str[0]) {
if (_strnicmp(as_str, "path=", 5) == 0) {
_putenv(as_str);
return;
} else {
as_str = &as_str[strlen(as_str) + 1];
}
}
}
void WriteDepFileOrDie(const char* object_path, const CLParser& parse) {
string depfile_path = string(object_path) + ".d";
FILE* depfile = fopen(depfile_path.c_str(), "w");
if (!depfile) {
unlink(object_path);
Fatal("opening %s: %s", depfile_path.c_str(),
GetLastErrorString().c_str());
}
if (fprintf(depfile, "%s: ", object_path) < 0) {
unlink(object_path);
fclose(depfile);
unlink(depfile_path.c_str());
Fatal("writing %s", depfile_path.c_str());
}
const set<string>& headers = parse.includes_;
for (set<string>::const_iterator i = headers.begin();
i != headers.end(); ++i) {
if (fprintf(depfile, "%s\n", EscapeForDepfile(*i).c_str()) < 0) {
unlink(object_path);
fclose(depfile);
unlink(depfile_path.c_str());
Fatal("writing %s", depfile_path.c_str());
}
}
fclose(depfile);
}
} // anonymous namespace
int MSVCHelperMain(int argc, char** argv) {
const char* output_filename = NULL;
const char* envfile = NULL;
const option kLongOptions[] = {
{ "help", no_argument, NULL, 'h' },
{ NULL, 0, NULL, 0 }
};
int opt;
string deps_prefix;
while ((opt = getopt_long(argc, argv, "e:o:p:h", kLongOptions, NULL)) != -1) {
switch (opt) {
case 'e':
envfile = optarg;
break;
case 'o':
output_filename = optarg;
break;
case 'p':
deps_prefix = optarg;
break;
case 'h':
default:
Usage();
return 0;
}
}
string env;
if (envfile) {
string err;
if (ReadFile(envfile, &env, &err) != 0)
Fatal("couldn't open %s: %s", envfile, err.c_str());
PushPathIntoEnvironment(env);
}
char* command = GetCommandLine();
command = strstr(command, " -- ");
if (!command) {
Fatal("expected command line to end with \" -- command args\"");
}
command += 4;
CLWrapper cl;
if (!env.empty())
cl.SetEnvBlock((void*)env.data());
string output;
int exit_code = cl.Run(command, &output);
if (output_filename) {
CLParser parser;
string err;
if (!parser.Parse(output, deps_prefix, &output, &err))
Fatal("%s\n", err.c_str());
WriteDepFileOrDie(output_filename, parser);
}
if (output.empty())
return exit_code;
// CLWrapper's output already as \r\n line endings, make sure the C runtime
// doesn't expand this to \r\r\n.
_setmode(_fileno(stdout), _O_BINARY);
// Avoid printf and C strings, since the actual output might contain null
// bytes like UTF-16 does (yuck).
fwrite(&output[0], 1, output.size(), stdout);
return exit_code;
}
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