aboutsummaryrefslogtreecommitdiff
path: root/bpkg/rep-fetch.cxx
blob: 2a298b89a8f446c30e422c0ccc92d95739c5d7dd (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
// file      : bpkg/rep-fetch.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
// license   : MIT; see accompanying LICENSE file

#include <bpkg/rep-fetch.hxx>

#include <libbpkg/manifest.hxx>

#include <bpkg/auth.hxx>
#include <bpkg/fetch.hxx>
#include <bpkg/package.hxx>
#include <bpkg/package-odb.hxx>
#include <bpkg/database.hxx>
#include <bpkg/diagnostics.hxx>

using namespace std;
using namespace butl;

namespace bpkg
{
  static void
  rep_fetch (const configuration_options& co,
             transaction& t,
             const shared_ptr<repository>& r,
             const shared_ptr<repository>& root,
             const string& reason)
  {
    tracer trace ("rep_fetch(rep)");

    database& db (t.database ());
    tracer_guard tg (db, trace);

    const repository_location& rl (r->location);
    l4 ([&]{trace << r->name << " " << rl;});
    assert (rl.absolute () || rl.remote ());

    // The fetch_*() functions below will be quiet at level 1, which
    // can be quite confusing if the download hangs.
    //
    if (verb)
    {
      diag_record dr (text);

      dr << "fetching " << r->name;

      const auto& ua (root->complements);

      if (ua.find (lazy_shared_ptr<repository> (db, r)) == ua.end ())
      {
        assert (!reason.empty ());
        dr << " (" << reason << ")";
      }
    }

    r->fetched = true; // Mark as being fetched.

    // Load the 'repositories' file and use it to populate the prerequisite
    // and complement repository sets.
    //
    pair<repository_manifests, string/*checksum*/> rmc (
      fetch_repositories (co, rl, true));

    repository_manifests& rms (rmc.first);

    bool a (co.auth () != auth::none &&
            (co.auth () == auth::all || rl.remote ()));

    shared_ptr<const certificate> cert;

    if (a)
    {
      cert = authenticate_certificate (
        co, &co.directory (), rms.back ().certificate, rl);

      a = !cert->dummy ();
    }

    // Load the 'packages' file.
    //
    pair<package_manifests, string/*checksum*/> pmc (
      fetch_packages (co, rl, true));

    package_manifests& pms (pmc.first);

    if (rmc.second != pms.sha256sum)
      fail << "repositories manifest file checksum mismatch for "
           << rl.canonical_name () <<
        info << "try again";

    if (a)
    {
      signature_manifest sm (fetch_signature (co, rl, true));

      if (sm.sha256sum != pmc.second)
        fail << "packages manifest file checksum mismatch for "
             << rl.canonical_name () <<
          info << "try again";

      assert (cert != nullptr);
      authenticate_repository (co, &co.directory (), nullopt, *cert, sm, rl);
    }

    for (repository_manifest& rm: rms)
    {
      repository_role rr (rm.effective_role ());

      if (rr == repository_role::base)
        continue; // Entry for this repository.

      // If the location is relative, complete it using this repository
      // as a base.
      //
      if (rm.location.relative ())
      {
        try
        {
          rm.location = repository_location (rm.location, rl);
        }
        catch (const invalid_argument& e)
        {
          fail << "invalid relative repository location '" << rm.location
               << "': " << e <<
            info << "base repository location is " << rl;
        }
      }

      // We might already have this repository in the database.
      //
      shared_ptr<repository> pr (
        db.find<repository> (
          rm.location.canonical_name ()));

      if (pr == nullptr)
      {
        pr = make_shared<repository> (move (rm.location));
        db.persist (pr); // Enter into session, important if recursive.
      }

      // Load the prerequisite repository unless it has already been
      // (or is already being) fetched.
      //
      if (!pr->fetched)
      {
        string reason;
        switch (rr)
        {
        case repository_role::complement:   reason = "complements ";     break;
        case repository_role::prerequisite: reason = "prerequisite of "; break;
        case repository_role::base: assert (false);
        }
        reason += r->name;

        rep_fetch (co, t, pr, root, reason);
      }

      // @@ What if we have duplicated? Ideally, we would like to check
      //    this once and as early as possible. The original idea was to
      //    do it during manifest parsing and serialization. But at that
      //    stage we have no way of completing relative locations (which
      //    is required to calculate canonical names). Current thinking is
      //    that we should have something like rep-verify (similar to
      //    pkg-verify) that performs (potentially expensive) repository
      //    verifications, including making sure prerequisites can be
      //    satisfied from the listed repositories, etc. Perhaps we can
      //    also re-use some of that functionality here. I.e., instead of
      //    calling the "naked" fetch_repositories() above, we will call
      //    a function from rep-verify that will perform extra verifications.
      //
      // @@ Also check for self-prerequisite.
      //
      switch (rr)
      {
      case repository_role::complement:
        {
          l4 ([&]{trace << pr->name << " complement of " << r->name;});
          r->complements.insert (lazy_shared_ptr<repository> (db, pr));
          break;
        }
      case repository_role::prerequisite:
        {
          l4 ([&]{trace << pr->name << " prerequisite of " << r->name;});
          r->prerequisites.insert (lazy_weak_ptr<repository> (db, pr));
          break;
        }
      case repository_role::base:
        assert (false);
      }
    }

    // "Suspend" session while persisting packages to reduce memory
    // consumption.
    //
    session& s (session::current ());
    session::reset_current ();

    for (package_manifest& pm: pms)
    {
      // We might already have this package in the database.
      //
      bool persist (false);

      shared_ptr<available_package> p (
        db.find<available_package> (
          available_package_id (pm.name, pm.version)));

      if (p == nullptr)
      {
        p = make_shared<available_package> (move (pm));
        persist = true;
      }
      else
      {
        // Make sure this is the same package.
        //
        assert (p->sha256sum && !p->locations.empty ()); // Can't be transient.

        if (*pm.sha256sum != *p->sha256sum)
        {
          // All the previous repositories that contain this package have the
          // same checksum (since they passed this test), so we can pick any
          // to show to the user.
          //
          const string& r1 (rl.canonical_name ());
          const string& r2 (p->locations[0].repository.object_id ());

          fail << "checksum mismatch for " << pm.name << " " << pm.version <<
            info << r1 << " has " << *pm.sha256sum <<
            info << r2 << " has " << *p->sha256sum <<
            info << "consider reporting this to the repository maintainers";
        }
      }

      // This repository shouldn't already be in the location set since
      // that would mean it has already been loaded and we shouldn't be
      // here.
      //
      p->locations.push_back (
        package_location {lazy_shared_ptr<repository> (db, r),
                          move (*pm.location)});

      if (persist)
        db.persist (p);
      else
        db.update (p);
    }

    session::current (s); // "Resume".

    // Save the changes to the repository object.
    //
    db.update (r);
  }

  int
  rep_fetch (const rep_fetch_options& o, cli::scanner&)
  {
    tracer trace ("rep_fetch");

    dir_path c (o.directory ());
    l4 ([&]{trace << "configuration: " << c;});

    database db (open (c, trace));
    transaction t (db.begin ());
    session s; // Repository dependencies can have cycles.

    shared_ptr<repository> root (db.load<repository> (""));
    const auto& ua (root->complements); // User-added repositories.

    if (ua.empty ())
      fail << "configuration " << c << " has no repositories" <<
        info << "use 'bpkg rep-add' to add a repository";

    // Clean repositories and available packages. At the end only
    // repositories that were explicitly added by the user and the
    // special root repository should remain.
    //
    db.erase_query<available_package> ();

    for (shared_ptr<repository> r: pointer_result (db.query<repository> ()))
    {
      if (r == root)
      {
        l5 ([&]{trace << "skipping root";});
      }
      else if (ua.find (lazy_shared_ptr<repository> (db, r)) != ua.end ())
      {
        l4 ([&]{trace << "cleaning " << r->name;});

        r->complements.clear ();
        r->prerequisites.clear ();
        r->fetched = false;
        db.update (r);
      }
      else
      {
        l4 ([&]{trace << "erasing " << r->name;});
        db.erase (r);
      }
    }

    // Now recursively fetch prerequisite/complement repositories and
    // their packages.
    //
    for (const lazy_shared_ptr<repository>& lp: ua)
    {
      shared_ptr<repository> r (lp.load ());

      if (!r->fetched) // Can already be loaded as a prerequisite/complement.
        rep_fetch (o, t, r, root, ""); // No reason (user-added).
    }

    size_t rcount, pcount;
    if (verb)
    {
      rcount = db.query_value<repository_count> ();
      pcount = db.query_value<available_package_count> ();
    }

    t.commit ();

    if (verb)
      text << pcount << " package(s) in " << rcount << " repository(s)";

    return 0;
  }
}