git-interface/git-update.py

   1 #!/usr/bin/python3
   2
   3 import os
   4 import pygit2
   5 import re
   6 import subprocess
   7 import sys
   8 import time
   9
  10 import srcinfo.parse
  11 import srcinfo.utils
  12
  13 import config
  14 import db
  15
  16 notify_cmd = config.get('notifications', 'notify-cmd')
  17
  18 repo_path = config.get('serve', 'repo-path')
  19 repo_regex = config.get('serve', 'repo-regex')
  20
  21 max_blob_size = config.getint('update', 'max-blob-size')
  22
  23
  24 def size_humanize(num):
  25     for unit in ['B', 'KiB', 'MiB', 'GiB', 'TiB', 'PiB', 'EiB', 'ZiB']:
  26         if abs(num) < 2048.0:
  27             if isinstance(num, int):
  28                 return "{}{}".format(num, unit)
  29             else:
  30                 return "{:.2f}{}".format(num, unit)
  31         num /= 1024.0
  32     return "{:.2f}{}".format(num, 'YiB')
  33
  34
  35 def extract_arch_fields(pkginfo, field):
  36     values = []
  37
  38     if field in pkginfo:
  39         for val in pkginfo[field]:
  40             values.append({"value": val, "arch": None})
  41
  42     for arch in ['i686', 'x86_64']:
  43         if field + '_' + arch in pkginfo:
  44             for val in pkginfo[field + '_' + arch]:
  45                 values.append({"value": val, "arch": arch})
  46
  47     return values
  48
  49
  50 def parse_dep(depstring):
  51     dep, _, desc = depstring.partition(': ')
  52     depname = re.sub(r'(<|=|>).*', '', dep)
  53     depcond = dep[len(depname):]
  54
  55     if (desc):
  56         return (depname + ': ' + desc, depcond)
  57     else:
  58         return (depname, depcond)
  59
  60
  61 def save_metadata(metadata, conn, user):
  62     # Obtain package base ID and previous maintainer.
  63     pkgbase = metadata['pkgbase']
  64     cur = conn.execute("SELECT ID, MaintainerUID FROM PackageBases "
  65                        "WHERE Name = ?", [pkgbase])
  66     (pkgbase_id, maintainer_uid) = cur.fetchone()
  67     was_orphan = not maintainer_uid
  68
  69     # Obtain the user ID of the new maintainer.
  70     cur = conn.execute("SELECT ID FROM Users WHERE Username = ?", [user])
  71     user_id = int(cur.fetchone()[0])
  72
  73     # Update package base details and delete current packages.
  74     now = int(time.time())
  75     conn.execute("UPDATE PackageBases SET ModifiedTS = ?, " +
  76                  "PackagerUID = ?, OutOfDateTS = NULL WHERE ID = ?",
  77                  [now, user_id, pkgbase_id])
  78     conn.execute("UPDATE PackageBases SET MaintainerUID = ? " +
  79                  "WHERE ID = ? AND MaintainerUID IS NULL",
  80                  [user_id, pkgbase_id])
  81     conn.execute("DELETE FROM Packages WHERE PackageBaseID = ?",
  82                  [pkgbase_id])
  83
  84     for pkgname in srcinfo.utils.get_package_names(metadata):
  85         pkginfo = srcinfo.utils.get_merged_package(pkgname, metadata)
  86
  87         if 'epoch' in pkginfo and int(pkginfo['epoch']) > 0:
  88             ver = '{:d}:{:s}-{:s}'.format(int(pkginfo['epoch']),
  89                                           pkginfo['pkgver'],
  90                                           pkginfo['pkgrel'])
  91         else:
  92             ver = '{:s}-{:s}'.format(pkginfo['pkgver'], pkginfo['pkgrel'])
  93
  94         for field in ('pkgdesc', 'url'):
  95             if field not in pkginfo:
  96                 pkginfo[field] = None
  97
  98         # Create a new package.
  99         cur = conn.execute("INSERT INTO Packages (PackageBaseID, Name, " +
 100                            "Version, Description, URL) " +
 101                            "VALUES (?, ?, ?, ?, ?)",
 102                            [pkgbase_id, pkginfo['pkgname'], ver,
 103                             pkginfo['pkgdesc'], pkginfo['url']])
 104         conn.commit()
 105         pkgid = cur.lastrowid
 106
 107         # Add package sources.
 108         for source_info in extract_arch_fields(pkginfo, 'source'):
 109             conn.execute("INSERT INTO PackageSources (PackageID, Source, " +
 110                          "SourceArch) VALUES (?, ?, ?)",
 111                          [pkgid, source_info['value'], source_info['arch']])
 112
 113         # Add package dependencies.
 114         for deptype in ('depends', 'makedepends',
 115                         'checkdepends', 'optdepends'):
 116             cur = conn.execute("SELECT ID FROM DependencyTypes WHERE Name = ?",
 117                                [deptype])
 118             deptypeid = cur.fetchone()[0]
 119             for dep_info in extract_arch_fields(pkginfo, deptype):
 120                 depname, depcond = parse_dep(dep_info['value'])
 121                 deparch = dep_info['arch']
 122                 conn.execute("INSERT INTO PackageDepends (PackageID, " +
 123                              "DepTypeID, DepName, DepCondition, DepArch) " +
 124                              "VALUES (?, ?, ?, ?, ?)",
 125                              [pkgid, deptypeid, depname, depcond, deparch])
 126
 127         # Add package relations (conflicts, provides, replaces).
 128         for reltype in ('conflicts', 'provides', 'replaces'):
 129             cur = conn.execute("SELECT ID FROM RelationTypes WHERE Name = ?",
 130                                [reltype])
 131             reltypeid = cur.fetchone()[0]
 132             for rel_info in extract_arch_fields(pkginfo, reltype):
 133                 relname, relcond = parse_dep(rel_info['value'])
 134                 relarch = rel_info['arch']
 135                 conn.execute("INSERT INTO PackageRelations (PackageID, " +
 136                              "RelTypeID, RelName, RelCondition, RelArch) " +
 137                              "VALUES (?, ?, ?, ?, ?)",
 138                              [pkgid, reltypeid, relname, relcond, relarch])
 139
 140         # Add package licenses.
 141         if 'license' in pkginfo:
 142             for license in pkginfo['license']:
 143                 cur = conn.execute("SELECT ID FROM Licenses WHERE Name = ?",
 144                                    [license])
 145                 row = cur.fetchone()
 146                 if row:
 147                     licenseid = row[0]
 148                 else:
 149                     cur = conn.execute("INSERT INTO Licenses (Name) " +
 150                                        "VALUES (?)", [license])
 151                     conn.commit()
 152                     licenseid = cur.lastrowid
 153                 conn.execute("INSERT INTO PackageLicenses (PackageID, " +
 154                              "LicenseID) VALUES (?, ?)",
 155                              [pkgid, licenseid])
 156
 157         # Add package groups.
 158         if 'groups' in pkginfo:
 159             for group in pkginfo['groups']:
 160                 cur = conn.execute("SELECT ID FROM Groups WHERE Name = ?",
 161                                    [group])
 162                 row = cur.fetchone()
 163                 if row:
 164                     groupid = row[0]
 165                 else:
 166                     cur = conn.execute("INSERT INTO Groups (Name) VALUES (?)",
 167                                        [group])
 168                     conn.commit()
 169                     groupid = cur.lastrowid
 170                 conn.execute("INSERT INTO PackageGroups (PackageID, "
 171                              "GroupID) VALUES (?, ?)", [pkgid, groupid])
 172
 173     # Add user to notification list on adoption.
 174     if was_orphan:
 175         cur = conn.execute("SELECT COUNT(*) FROM PackageNotifications WHERE " +
 176                            "PackageBaseID = ? AND UserID = ?",
 177                            [pkgbase_id, user_id])
 178         if cur.fetchone()[0] == 0:
 179             conn.execute("INSERT INTO PackageNotifications " +
 180                          "(PackageBaseID, UserID) VALUES (?, ?)",
 181                          [pkgbase_id, user_id])
 182
 183     conn.commit()
 184
 185
 186 def update_notify(conn, user, pkgbase_id):
 187     # Obtain the user ID of the new maintainer.
 188     cur = conn.execute("SELECT ID FROM Users WHERE Username = ?", [user])
 189     user_id = int(cur.fetchone()[0])
 190
 191     # Execute the notification script.
 192     subprocess.Popen((notify_cmd, 'update', str(user_id), str(pkgbase_id)))
 193
 194
 195 def die(msg):
 196     sys.stderr.write("error: {:s}\n".format(msg))
 197     exit(1)
 198
 199
 200 def warn(msg):
 201     sys.stderr.write("warning: {:s}\n".format(msg))
 202
 203
 204 def die_commit(msg, commit):
 205     sys.stderr.write("error: The following error " +
 206                      "occurred when parsing commit\n")
 207     sys.stderr.write("error: {:s}:\n".format(commit))
 208     sys.stderr.write("error: {:s}\n".format(msg))
 209     exit(1)
 210
 211
 212 repo = pygit2.Repository(repo_path)
 213
 214 user = os.environ.get("AUR_USER")
 215 pkgbase = os.environ.get("AUR_PKGBASE")
 216 privileged = (os.environ.get("AUR_PRIVILEGED", '0') == '1')
 217 warn_or_die = warn if privileged else die
 218
 219 if len(sys.argv) == 2 and sys.argv[1] == "restore":
 220     if 'refs/heads/' + pkgbase not in repo.listall_references():
 221         die('{:s}: repository not found: {:s}'.format(sys.argv[1], pkgbase))
 222     refname = "refs/heads/master"
 223     sha1_old = sha1_new = repo.lookup_reference('refs/heads/' + pkgbase).target
 224 elif len(sys.argv) == 4:
 225     refname, sha1_old, sha1_new = sys.argv[1:4]
 226 else:
 227     die("invalid arguments")
 228
 229 if refname != "refs/heads/master":
 230     die("pushing to a branch other than master is restricted")
 231
 232 conn = db.Connection()
 233
 234 # Detect and deny non-fast-forwards.
 235 if sha1_old != "0000000000000000000000000000000000000000" and not privileged:
 236     walker = repo.walk(sha1_old, pygit2.GIT_SORT_TOPOLOGICAL)
 237     walker.hide(sha1_new)
 238     if next(walker, None) is not None:
 239         die("denying non-fast-forward (you should pull first)")
 240
 241 # Prepare the walker that validates new commits.
 242 walker = repo.walk(sha1_new, pygit2.GIT_SORT_TOPOLOGICAL)
 243 if sha1_old != "0000000000000000000000000000000000000000":
 244     walker.hide(sha1_old)
 245
 246 # Validate all new commits.
 247 for commit in walker:
 248     for fname in ('.SRCINFO', 'PKGBUILD'):
 249         if fname not in commit.tree:
 250             die_commit("missing {:s}".format(fname), str(commit.id))
 251
 252     for treeobj in commit.tree:
 253         blob = repo[treeobj.id]
 254
 255         if isinstance(blob, pygit2.Tree):
 256             die_commit("the repository must not contain subdirectories",
 257                        str(commit.id))
 258
 259         if not isinstance(blob, pygit2.Blob):
 260             die_commit("not a blob object: {:s}".format(treeobj),
 261                        str(commit.id))
 262
 263         if blob.size > max_blob_size:
 264             die_commit("maximum blob size ({:s}) exceeded".format(size_humanize(max_blob_size)), str(commit.id))
 265
 266     metadata_raw = repo[commit.tree['.SRCINFO'].id].data.decode()
 267     (metadata, errors) = srcinfo.parse.parse_srcinfo(metadata_raw)
 268     if errors:
 269         sys.stderr.write("error: The following errors occurred "
 270                          "when parsing .SRCINFO in commit\n")
 271         sys.stderr.write("error: {:s}:\n".format(str(commit.id)))
 272         for error in errors:
 273             for err in error['error']:
 274                 sys.stderr.write("error: line {:d}: {:s}\n".format(error['line'], err))
 275         exit(1)
 276
 277     metadata_pkgbase = metadata['pkgbase']
 278     if not re.match(repo_regex, metadata_pkgbase):
 279         die_commit('invalid pkgbase: {:s}'.format(metadata_pkgbase),
 280                    str(commit.id))
 281
 282     for pkgname in set(metadata['packages'].keys()):
 283         pkginfo = srcinfo.utils.get_merged_package(pkgname, metadata)
 284
 285         for field in ('pkgver', 'pkgrel', 'pkgname'):
 286             if field not in pkginfo:
 287                 die_commit('missing mandatory field: {:s}'.format(field),
 288                            str(commit.id))
 289
 290         if 'epoch' in pkginfo and not pkginfo['epoch'].isdigit():
 291             die_commit('invalid epoch: {:s}'.format(pkginfo['epoch']),
 292                        str(commit.id))
 293
 294         if not re.match(r'[a-z0-9][a-z0-9\.+_-]*$', pkginfo['pkgname']):
 295             die_commit('invalid package name: {:s}'.format(pkginfo['pkgname']),
 296                        str(commit.id))
 297
 298         for field in ('pkgname', 'pkgdesc', 'url'):
 299             if field in pkginfo and len(pkginfo[field]) > 255:
 300                 die_commit('{:s} field too long: {:s}'.format(field, pkginfo[field]),
 301                            str(commit.id))
 302
 303         for field in ('install', 'changelog'):
 304             if field in pkginfo and not pkginfo[field] in commit.tree:
 305                 die_commit('missing {:s} file: {:s}'.format(field, pkginfo[field]),
 306                            str(commit.id))
 307
 308         for field in extract_arch_fields(pkginfo, 'source'):
 309             fname = field['value']
 310             if "://" in fname or "lp:" in fname:
 311                 continue
 312             if fname not in commit.tree:
 313                 die_commit('missing source file: {:s}'.format(fname),
 314                            str(commit.id))
 315
 316
 317 # Display a warning if .SRCINFO is unchanged.
 318 if sha1_old not in ("0000000000000000000000000000000000000000", sha1_new):
 319     srcinfo_id_old = repo[sha1_old].tree['.SRCINFO'].id
 320     srcinfo_id_new = repo[sha1_new].tree['.SRCINFO'].id
 321     if srcinfo_id_old == srcinfo_id_new:
 322         warn(".SRCINFO unchanged. The package database will not be updated!")
 323
 324 # Read .SRCINFO from the HEAD commit.
 325 metadata_raw = repo[repo[sha1_new].tree['.SRCINFO'].id].data.decode()
 326 (metadata, errors) = srcinfo.parse.parse_srcinfo(metadata_raw)
 327
 328 # Ensure that the package base name matches the repository name.
 329 metadata_pkgbase = metadata['pkgbase']
 330 if metadata_pkgbase != pkgbase:
 331     die('invalid pkgbase: {:s}, expected {:s}'.format(metadata_pkgbase, pkgbase))
 332
 333 # Ensure that packages are neither blacklisted nor overwritten.
 334 pkgbase = metadata['pkgbase']
 335 cur = conn.execute("SELECT ID FROM PackageBases WHERE Name = ?", [pkgbase])
 336 row = cur.fetchone()
 337 pkgbase_id = row[0] if row else 0
 338
 339 cur = conn.execute("SELECT Name FROM PackageBlacklist")
 340 blacklist = [row[0] for row in cur.fetchall()]
 341
 342 cur = conn.execute("SELECT Name, Repo FROM OfficialProviders")
 343 providers = dict(cur.fetchall())
 344
 345 for pkgname in srcinfo.utils.get_package_names(metadata):
 346     pkginfo = srcinfo.utils.get_merged_package(pkgname, metadata)
 347     pkgname = pkginfo['pkgname']
 348
 349     if pkgname in blacklist:
 350         warn_or_die('package is blacklisted: {:s}'.format(pkgname))
 351     if pkgname in providers:
 352         repo = providers[pkgname]
 353         warn_or_die('package already provided by [{:s}]: {:s}'.format(repo, pkgname))
 354
 355     cur = conn.execute("SELECT COUNT(*) FROM Packages WHERE Name = ? AND " +
 356                        "PackageBaseID <> ?", [pkgname, pkgbase_id])
 357     if cur.fetchone()[0] > 0:
 358         die('cannot overwrite package: {:s}'.format(pkgname))
 359
 360 # Store package base details in the database.
 361 save_metadata(metadata, conn, user)
 362
 363 # Create (or update) a branch with the name of the package base for better
 364 # accessibility.
 365 repo.create_reference('refs/heads/' + pkgbase, sha1_new, True)
 366
 367 # Work around a Git bug: The HEAD ref is not updated when using gitnamespaces.
 368 # This can be removed once the bug fix is included in Git mainline. See
 369 # http://git.661346.n2.nabble.com/PATCH-receive-pack-Create-a-HEAD-ref-for-ref-namespace-td7632149.html
 370 # for details.
 371 repo.create_reference('refs/namespaces/' + pkgbase + '/HEAD', sha1_new, True)
 372
 373 # Send package update notifications.
 374 update_notify(conn, user, pkgbase_id)
 375
 376 # Close the database.
 377 conn.close()