aboutsummaryrefslogtreecommitdiff
path: root/bpkg/utility.cxx
blob: 4d72d7b2d8b071581ce427f90ccf19648eff577e (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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
// file      : bpkg/utility.cxx -*- C++ -*-
// license   : MIT; see accompanying LICENSE file

#include <bpkg/utility.hxx>

#include <libbutl/prompt.hxx>
#include <libbutl/fdstream.hxx>

#include <bpkg/diagnostics.hxx>
#include <bpkg/common-options.hxx>

using namespace std;
using namespace butl;

namespace bpkg
{
  const string empty_string;
  const path empty_path;
  const dir_path empty_dir_path;

  const dir_path bpkg_dir (".bpkg");

  // Keep these directory names short, lowering the probability of hitting the
  // path length limit on Windows.
  //
  const dir_path certs_dir (dir_path (bpkg_dir) /= "certs");
  const dir_path repos_dir (dir_path (bpkg_dir) /= "repos");

  const dir_path current_dir (".");

  map<dir_path, dir_path> temp_dir;

  auto_rmfile
  tmp_file (const dir_path& cfg, const string& p)
  {
    auto i (temp_dir.find (cfg));
    assert (i != temp_dir.end ());
    return auto_rmfile (i->second / path::traits_type::temp_name (p));
  }

  auto_rmdir
  tmp_dir (const dir_path& cfg, const string& p)
  {
    auto i (temp_dir.find (cfg));
    assert (i != temp_dir.end ());
    return auto_rmdir (i->second / dir_path (path::traits_type::temp_name (p)));
  }

  void
  init_tmp (const dir_path& cfg)
  {
    // Whether the configuration is required or optional depends on the
    // command so if the configuration directory does not exist or it is not a
    // bpkg configuration directory, we simply create tmp in a system one and
    // let the command complain if necessary.
    //
    dir_path d (cfg.empty () ||
                !exists (cfg / bpkg_dir, true /* ignore_error */)
                ? dir_path::temp_path ("bpkg")
                : cfg / bpkg_dir / dir_path ("tmp"));

    if (exists (d))
      rm_r (d, true /* dir_itself */, 2);

    mk (d); // We shouldn't need mk_p().

    temp_dir[cfg] = move (d);
  }

  void
  clean_tmp (bool ignore_error)
  {
    for (const auto& d: temp_dir)
    {
      const dir_path& td (d.second);

      if (exists (td))
      {
        rm_r (td,
              true /* dir_itself */,
              3,
              ignore_error ? rm_error_mode::ignore : rm_error_mode::fail);
      }
    }

    temp_dir.clear ();
  }

  path&
  normalize (path& f, const char* what)
  {
    try
    {
      f.complete ().normalize ();
    }
    catch (const invalid_path& e)
    {
      fail << "invalid " << what << " path " << e.path;
    }
    catch (const system_error& e)
    {
      fail << "unable to obtain current directory: " << e;
    }

    return f;
  }

  dir_path&
  normalize (dir_path& d, const char* what)
  {
    try
    {
      d.complete ().normalize ();
    }
    catch (const invalid_path& e)
    {
      fail << "invalid " << what << " directory " << e.path;
    }
    catch (const system_error& e)
    {
      fail << "unable to obtain current directory: " << e;
    }

    return d;
  }

  dir_path
  current_directory ()
  {
    try
    {
      return dir_path::current_directory ();
    }
    catch (const system_error& e)
    {
      fail << "unable to obtain current directory: " << e << endf;
    }
  }

  bool stderr_term;

  bool
  yn_prompt (const string& p, char d)
  {
    try
    {
      return butl::yn_prompt (p, d);
    }
    catch (io_error&)
    {
      fail << "unable to read y/n answer from stdin" << endf;
    }
  }

  bool
  exists (const path& f, bool ignore_error)
  {
    try
    {
      return file_exists (f, true /* follow_symlinks */, ignore_error);
    }
    catch (const system_error& e)
    {
      fail << "unable to stat path " << f << ": " << e << endf;
    }
  }

  bool
  exists (const dir_path& d, bool ignore_error)
  {
    try
    {
      return dir_exists (d, ignore_error);
    }
    catch (const system_error& e)
    {
      fail << "unable to stat path " << d << ": " << e << endf;
    }
  }

  bool
  empty (const dir_path& d)
  {
    try
    {
      return dir_empty (d);
    }
    catch (const system_error& e)
    {
      fail << "unable to scan directory " << d << ": " << e << endf;
    }
  }

  void
  mk (const dir_path& d)
  {
    if (verb >= 3)
      text << "mkdir " << d;

    try
    {
      try_mkdir (d);
    }
    catch (const system_error& e)
    {
      fail << "unable to create directory " << d << ": " << e;
    }
  }

  void
  mk_p (const dir_path& d)
  {
    if (verb >= 3)
      text << "mkdir -p " << d;

    try
    {
      try_mkdir_p (d);
    }
    catch (const system_error& e)
    {
      fail << "unable to create directory " << d << ": " << e;
    }
  }

  void
  rm (const path& f, uint16_t v)
  {
    if (verb >= v)
      text << "rm " << f;

    try
    {
      if (try_rmfile (f) == rmfile_status::not_exist)
        fail << "unable to remove file " << f << ": file does not exist";
    }
    catch (const system_error& e)
    {
      fail << "unable to remove file " << f << ": " << e;
    }
  }

  void
  rm_r (const dir_path& d, bool dir, uint16_t v, rm_error_mode m)
  {
    if (verb >= v)
      text << (dir ? "rmdir -r " : "rm -r ") << (dir ? d : d / dir_path ("*"));

    try
    {
      rmdir_r (d, dir, m == rm_error_mode::ignore);
    }
    catch (const system_error& e)
    {
      bool w (m == rm_error_mode::warn);

      (w ? warn : error) << "unable to remove " << (dir ? "" : "contents of ")
                         << "directory " << d << ": " << e;

      if (!w)
        throw failed ();
    }
  }

  bool
  mv (const dir_path& from, const dir_path& to, bool ie)
  {
    if (verb >= 3)
      text << "mv " << from << ' ' << to; // Prints trailing slashes.

    try
    {
      mvdir (from, to);
    }
    catch (const system_error& e)
    {
      error << "unable to move directory " << from << " to " << to << ": "
            << e;

      if (ie)
        return false;

      throw failed ();
    }

    return true;
  }

  dir_path
  change_wd (const dir_path& d)
  {
    try
    {
      dir_path r (dir_path::current_directory ());

      if (verb >= 3)
        text << "cd " << d; // Prints trailing slash.

      dir_path::current_directory (d);
      return r;
    }
    catch (const system_error& e)
    {
      fail << "unable to change current directory to " << d << ": " << e
           << endf;
    }
  }

  fdpipe
  open_pipe ()
  {
    try
    {
      return fdopen_pipe ();
    }
    catch (const io_error& e)
    {
      fail << "unable to open pipe: " << e << endf;
    }
  }

  auto_fd
  open_null ()
  {
    try
    {
      return fdopen_null ();
    }
    catch (const io_error& e)
    {
      fail << "unable to open null device: " << e << endf;
    }
  }

  dir_path exec_dir;

  const char*
  name_b (const common_options& co)
  {
    return co.build_specified ()
      ? co.build ().string ().c_str ()
      : BPKG_EXE_PREFIX "b" BPKG_EXE_SUFFIX;
  }
}