summaryrefslogtreecommitdiffstats
path: root/src/msvc_helper_main-win32.cc
blob: 7d593071f93f256baeae3d0bc772b6e660014196 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
// 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"

using namespace std;

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 = GetCommandLineA();
  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;
}