76
57
def rebuild_svn_config(store, config):
77
58
"""Build the complete SVN configuration file.
78
60
@param config: An ivle.config.Config object.
80
users = store.find(ivle.database.User)
82
# TODO: Populate groups with per-offering tutors/lecturers/etc.
62
users = store.find(User)
83
63
conf_name = config['paths']['svn']['conf']
84
64
temp_name = conf_name + ".new"
85
65
f = open(temp_name, "w")
86
f.write("# IVLE SVN Repositories Configuration\n")
87
f.write("# Auto-generated on %s\n" % time.asctime())
90
for (g,ls) in groups.iteritems():
91
f.write("%s = %s\n" % (g, ",".join(ls)))
67
# IVLE SVN repository authorisation configuration
69
""" % {'time': time.asctime()})
94
f.write("[%s:/]\n" % u.login)
95
f.write("%s = rw\n" % u.login)
96
#f.write("@tutor = r\n")
97
#f.write("@lecturer = rw\n")
98
#f.write("@admin = rw\n")
75
""" % {'login': u.login.encode('utf-8')})
77
# Now we need to grant offering tutors and lecturers access to the latest
78
# submissions in their offerings. There are much prettier ways to do this,
79
# but a lot of browser requests call this function, so it needs to be
80
# fast. We can grab all of the paths needing authorisation directives with
81
# a single query, and we cache the list of viewers for each offering.
82
offering_viewers_cache = {}
83
for (login, psid, pspath, offeringid) in store.find(
84
(User.login, ProjectSubmission.id, ProjectSubmission.path,
86
Assessed.id == ProjectSubmission.assessed_id,
87
User.id == Assessed.user_id,
88
Project.id == Assessed.project_id,
89
ProjectSet.id == Project.project_set_id,
90
Offering.id == ProjectSet.id,
91
ProjectSubmission.date_submitted == Select(
92
Max(ProjectSubmission.date_submitted),
93
ProjectSubmission.assessed_id == Assessed.id,
94
tables=ProjectSubmission
98
# Do we already have the list of logins authorised for this offering
99
# cached? If not, get it.
100
if offeringid not in offering_viewers_cache:
101
offering_viewers_cache[offeringid] = list(store.find(
103
User.id == Enrolment.user_id,
104
Enrolment.offering_id == offeringid,
105
Enrolment.role.is_in((u'tutor', u'lecturer')),
106
Enrolment.active == True,
113
""" % {'login': login.encode('utf-8'), 'id': psid,
114
'path': pspath.encode('utf-8')})
116
for viewer_login in offering_viewers_cache[offeringid]:
117
# We don't want to override the owner's write privilege,
118
# so we don't add them to the read-only ACL.
119
if login != viewer_login:
120
f.write("%s = r\n" % viewer_login.encode('utf-8'))
101
123
os.rename(temp_name, conf_name)
102
124
chown_to_webserver(conf_name)
104
126
def rebuild_svn_group_config(store, config):
105
127
"""Build the complete SVN configuration file for groups
106
129
@param config: An ivle.config.Config object.
108
131
conf_name = config['paths']['svn']['group_conf']
109
132
temp_name = conf_name + ".new"
110
133
f = open(temp_name, "w")
111
f.write("# IVLE SVN Group Repositories Configuration\n")
112
f.write("# Auto-generated on %s\n" % time.asctime())
136
# IVLE SVN group repository authorisation configuration
137
# Generated: %(time)s
139
""" % {'time': time.asctime()})
141
group_members_cache = {}
114
142
for group in store.find(ProjectGroup):
115
143
offering = group.project_set.offering
116
144
reponame = "_".join([offering.subject.short_name,
117
145
offering.semester.year,
118
146
offering.semester.semester,
120
f.write("[%s:/]\n"%reponame)
149
f.write("[%s:/]\n" % reponame.encode('utf-8'))
150
if group.id not in group_members_cache:
151
group_members_cache[group.id] = set()
121
152
for user in group.members:
122
f.write("%s = rw\n" % user.login)
153
group_members_cache[group.id].add(user.login)
154
f.write("%s = rw\n" % user.login.encode('utf-8'))
157
# Now we need to grant offering tutors and lecturers access to the latest
158
# submissions in their offerings. There are much prettier ways to do this,
159
# but a lot of browser requests call this function, so it needs to be
160
# fast. We can grab all of the paths needing authorisation directives with
161
# a single query, and we cache the list of viewers for each offering.
162
offering_viewers_cache = {}
163
for (ssn, year, sem, name, psid, pspath, gid, offeringid) in store.find(
164
(Subject.short_name, Semester.year, Semester.semester,
165
ProjectGroup.name, ProjectSubmission.id, ProjectSubmission.path,
166
ProjectGroup.id, Offering.id),
167
Assessed.id == ProjectSubmission.assessed_id,
168
ProjectGroup.id == Assessed.project_group_id,
169
Project.id == Assessed.project_id,
170
ProjectSet.id == Project.project_set_id,
171
Offering.id == ProjectSet.offering_id,
172
Subject.id == Offering.subject_id,
173
Semester.id == Offering.semester_id,
174
ProjectSubmission.date_submitted == Select(
175
Max(ProjectSubmission.date_submitted),
176
ProjectSubmission.assessed_id == Assessed.id,
177
tables=ProjectSubmission
181
reponame = "_".join([ssn, year, sem, name])
183
# Do we already have the list of logins authorised for this offering
184
# cached? If not, get it.
185
if offeringid not in offering_viewers_cache:
186
offering_viewers_cache[offeringid] = list(store.find(
188
User.id == Enrolment.user_id,
189
Enrolment.offering_id == offeringid,
190
Enrolment.role.is_in((u'tutor', u'lecturer')),
191
Enrolment.active == True,
198
""" % {'repo': reponame.encode('utf-8'), 'id': psid,
199
'path': pspath.encode('utf-8')})
201
for viewer_login in offering_viewers_cache[offeringid]:
202
# Skip existing group members, or they can't write to it any more.
203
if viewer_login not in group_members_cache[gid]:
204
f.write("%s = r\n" % viewer_login)
125
207
os.rename(temp_name, conf_name)
126
208
chown_to_webserver(conf_name)
128
210
def make_svn_auth(store, login, config, throw_on_error=True):
129
"""Setup svn authentication for the given user.
130
Uses the given DB store object. Does not commit to the db.
211
"""Create a Subversion password for a user.
213
Generates a new random Subversion password, and assigns it to the user.
214
The password is added to Apache's Subversion authentication file.
132
216
# filename is, eg, /var/lib/ivle/svn/ivle.auth
133
217
filename = config['paths']['svn']['auth_ivle']
134
passwd = hashlib.md5(uuid.uuid4().bytes).hexdigest()
135
218
if os.path.exists(filename):
140
user = ivle.database.User.get_by_login(store, login)
141
user.svn_pass = unicode(passwd)
143
res = os.system("htpasswd -%smb %s %s %s" % (create, filename,
223
user = User.get_by_login(store, login)
225
if user.svn_pass is None:
226
passwd = hashlib.md5(uuid.uuid4().bytes).hexdigest()
227
user.svn_pass = unicode(passwd)
229
res = subprocess.call(['htpasswd', '-%smb' % create,
230
filename, login, user.svn_pass])
145
231
if res != 0 and throw_on_error:
146
232
raise Exception("Unable to create ivle-auth for %s" % login)
149
235
if create == "c":
150
236
chown_to_webserver(filename)
154
def generate_manifest(basedir, targetdir, parent=''):
155
""" From a basedir and a targetdir work out which files are missing or out
156
of date and need to be added/updated and which files are redundant and need
159
parent: This is used for the recursive call to track the relative paths
160
that we have decended.
163
cmp = filecmp.dircmp(basedir, targetdir)
165
# Add all new files and files that have changed
166
to_add = [os.path.join(parent,x) for x in (cmp.left_only + cmp.diff_files)]
168
# Remove files that are redundant
169
to_remove = [os.path.join(parent,x) for x in cmp.right_only]
172
for d in cmp.common_dirs:
173
newbasedir = os.path.join(basedir, d)
174
newtargetdir = os.path.join(targetdir, d)
175
newparent = os.path.join(parent, d)
176
(sadd,sremove) = generate_manifest(newbasedir, newtargetdir, newparent)
180
return (to_add, to_remove)
183
240
def make_jail(user, config, force=True):
184
"""Creates a new user's jail space, in the jail directory as configured in
241
"""Create or update a user's jail.
187
This only creates things within /home - everything else is expected to be
188
part of another UnionFS branch.
243
Only the user-specific parts of the jail are created here - everything
244
else is expected to be part of another aufs branch.
190
246
Returns the path to the user's home directory.
192
248
Chowns the user's directory within the jail to the given UID.
194
force: If false, exception if jail already exists for this user.
195
If true (default), overwrites it, but preserves home directory.
250
@param force: If False, raise an exception if the user already has a jail.
251
If True (default), rebuild the jail preserving /home.
197
253
# MUST run as root or some of this may fail
198
254
if os.getuid() != 0:
246
303
make_ivle_conf(user.login, userdir, user.svn_pass, config)
247
304
make_etc_passwd(user.login, userdir, config['paths']['jails']['template'],
307
os.chmod(tmpdir, 01777)
250
309
return userhomedir
252
311
def make_ivle_conf(username, user_jail_dir, svn_pass, sys_config):
312
"""Generate an ivle.conf for a user's jail.
254
314
Creates (overwriting any existing file, and creating directories) a
255
315
file /etc/ivle/ivle.conf in a given user's jail.
256
317
@param username: Username.
257
318
@param user_jail_dir: User's jail dir, ie. ['jails']['src'] + username
258
319
@param svn_pass: User's SVN password.
259
320
@param sys_config: An ivle.config.Config object (the system-wide config).
261
conf_path = os.path.join(user_jail_dir, "etc/ivle/ivle.conf")
262
os.makedirs(os.path.dirname(conf_path))
322
conf_path = os.path.join(user_jail_dir, "home/.ivle.conf")
323
if not os.path.exists(os.path.dirname(conf_path)):
324
os.makedirs(os.path.dirname(conf_path))
264
326
# In the "in-jail" version of conf, we don't need MOST of the details
265
327
# (it would be a security risk to have them here).
266
328
# So we just write root_dir.
267
329
conf_obj = ivle.config.Config(blank=True)
268
330
conf_obj.filename = conf_path
331
conf_obj['urls'] = {}
269
332
conf_obj['urls']['root'] = sys_config['urls']['root']
270
333
conf_obj['urls']['public_host'] = sys_config['urls']['public_host']
271
334
conf_obj['urls']['svn_addr'] = sys_config['urls']['svn_addr']
335
conf_obj['user_info'] = {}
272
336
conf_obj['user_info']['login'] = username
273
337
conf_obj['user_info']['svn_pass'] = svn_pass