77
57
def rebuild_svn_config(store, config):
78
58
"""Build the complete SVN configuration file.
79
60
@param config: An ivle.config.Config object.
81
users = store.find(ivle.database.User)
83
# TODO: Populate groups with per-offering tutors/lecturers/etc.
62
users = store.find(User)
84
63
conf_name = config['paths']['svn']['conf']
85
64
temp_name = conf_name + ".new"
86
65
f = open(temp_name, "w")
87
f.write("# IVLE SVN Repositories Configuration\n")
88
f.write("# Auto-generated on %s\n" % time.asctime())
91
for (g,ls) in groups.iteritems():
92
f.write("%s = %s\n" % (g, ",".join(ls)))
67
# IVLE SVN repository authorisation configuration
69
""" % {'time': time.asctime()})
95
f.write("[%s:/]\n" % u.login)
96
f.write("%s = rw\n" % u.login)
97
#f.write("@tutor = r\n")
98
#f.write("@lecturer = rw\n")
99
#f.write("@admin = rw\n")
75
""" % {'login': u.login})
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, 'id': psid, 'path': pspath})
115
for viewer_login in offering_viewers_cache[offeringid]:
116
# We don't want to override the owner's write privilege,
117
# so we don't add them to the read-only ACL.
118
if login != viewer_login:
119
f.write("%s = r\n" % viewer_login)
102
122
os.rename(temp_name, conf_name)
103
123
chown_to_webserver(conf_name)
105
125
def rebuild_svn_group_config(store, config):
106
126
"""Build the complete SVN configuration file for groups
107
128
@param config: An ivle.config.Config object.
109
130
conf_name = config['paths']['svn']['group_conf']
110
131
temp_name = conf_name + ".new"
111
132
f = open(temp_name, "w")
112
f.write("# IVLE SVN Group Repositories Configuration\n")
113
f.write("# Auto-generated on %s\n" % time.asctime())
135
# IVLE SVN group repository authorisation configuration
136
# Generated: %(time)s
138
""" % {'time': time.asctime()})
140
group_members_cache = {}
115
141
for group in store.find(ProjectGroup):
116
142
offering = group.project_set.offering
117
143
reponame = "_".join([offering.subject.short_name,
118
144
offering.semester.year,
119
145
offering.semester.semester,
121
f.write("[%s:/]\n"%reponame)
148
f.write("[%s:/]\n" % reponame)
149
if group.id not in group_members_cache:
150
group_members_cache[group.id] = set()
122
151
for user in group.members:
152
group_members_cache[group.id].add(user.login)
123
153
f.write("%s = rw\n" % user.login)
156
# Now we need to grant offering tutors and lecturers access to the latest
157
# submissions in their offerings. There are much prettier ways to do this,
158
# but a lot of browser requests call this function, so it needs to be
159
# fast. We can grab all of the paths needing authorisation directives with
160
# a single query, and we cache the list of viewers for each offering.
161
offering_viewers_cache = {}
162
for (ssn, year, sem, name, psid, pspath, gid, offeringid) in store.find(
163
(Subject.short_name, Semester.year, Semester.semester,
164
ProjectGroup.name, ProjectSubmission.id, ProjectSubmission.path,
165
ProjectGroup.id, Offering.id),
166
Assessed.id == ProjectSubmission.assessed_id,
167
ProjectGroup.id == Assessed.project_group_id,
168
Project.id == Assessed.project_id,
169
ProjectSet.id == Project.project_set_id,
170
Offering.id == ProjectSet.offering_id,
171
Subject.id == Offering.subject_id,
172
Semester.id == Offering.semester_id,
173
ProjectSubmission.date_submitted == Select(
174
Max(ProjectSubmission.date_submitted),
175
ProjectSubmission.assessed_id == Assessed.id,
176
tables=ProjectSubmission
180
reponame = "_".join([ssn, year, sem, name])
182
# Do we already have the list of logins authorised for this offering
183
# cached? If not, get it.
184
if offeringid not in offering_viewers_cache:
185
offering_viewers_cache[offeringid] = list(store.find(
187
User.id == Enrolment.user_id,
188
Enrolment.offering_id == offeringid,
189
Enrolment.role.is_in((u'tutor', u'lecturer')),
190
Enrolment.active == True,
197
""" % {'repo': reponame, 'id': psid, 'path': pspath})
199
for viewer_login in offering_viewers_cache[offeringid]:
200
# Skip existing group members, or they can't write to it any more.
201
if viewer_login not in group_members_cache[gid]:
202
f.write("%s = r\n" % viewer_login)
126
205
os.rename(temp_name, conf_name)
127
206
chown_to_webserver(conf_name)
129
208
def make_svn_auth(store, login, config, throw_on_error=True):
130
"""Setup svn authentication for the given user.
131
Uses the given DB store object. Does not commit to the db.
209
"""Create a Subversion password for a user.
211
Generates a new random Subversion password, and assigns it to the user.
212
The password is added to Apache's Subversion authentication file.
133
214
# filename is, eg, /var/lib/ivle/svn/ivle.auth
134
215
filename = config['paths']['svn']['auth_ivle']
135
passwd = hashlib.md5(uuid.uuid4().bytes).hexdigest()
136
216
if os.path.exists(filename):
141
user = ivle.database.User.get_by_login(store, login)
142
user.svn_pass = unicode(passwd)
144
res = os.system("htpasswd -%smb %s %s %s" % (create, filename,
221
user = User.get_by_login(store, login)
223
if user.svn_pass is None:
224
passwd = hashlib.md5(uuid.uuid4().bytes).hexdigest()
225
user.svn_pass = unicode(passwd)
227
res = subprocess.call(['htpasswd', '-%smb' % create,
228
filename, login, user.svn_pass])
146
229
if res != 0 and throw_on_error:
147
230
raise Exception("Unable to create ivle-auth for %s" % login)
150
233
if create == "c":
151
234
chown_to_webserver(filename)
155
def generate_manifest(basedir, targetdir, parent=''):
156
""" From a basedir and a targetdir work out which files are missing or out
157
of date and need to be added/updated and which files are redundant and need
160
parent: This is used for the recursive call to track the relative paths
161
that we have decended.
164
cmp = filecmp.dircmp(basedir, targetdir)
166
# Add all new files and files that have changed
167
to_add = [os.path.join(parent,x) for x in (cmp.left_only + cmp.diff_files)]
169
# Remove files that are redundant
170
to_remove = [os.path.join(parent,x) for x in cmp.right_only]
173
for d in cmp.common_dirs:
174
newbasedir = os.path.join(basedir, d)
175
newtargetdir = os.path.join(targetdir, d)
176
newparent = os.path.join(parent, d)
177
(sadd,sremove) = generate_manifest(newbasedir, newtargetdir, newparent)
181
return (to_add, to_remove)
184
def make_jail(user, force=True):
185
"""Creates a new user's jail space, in the jail directory as configured in
188
This only creates things within /home - everything else is expected to be
189
part of another UnionFS branch.
238
def make_jail(user, config, force=True):
239
"""Create or update a user's jail.
241
Only the user-specific parts of the jail are created here - everything
242
else is expected to be part of another aufs branch.
191
244
Returns the path to the user's home directory.
193
246
Chowns the user's directory within the jail to the given UID.
195
force: If false, exception if jail already exists for this user.
196
If true (default), overwrites it, but preserves home directory.
248
@param force: If False, raise an exception if the user already has a jail.
249
If True (default), rebuild the jail preserving /home.
198
251
# MUST run as root or some of this may fail
199
252
if os.getuid() != 0:
200
253
raise Exception("Must run make_jail as root")
202
255
# tempdir is for putting backup homes in
203
tempdir = os.path.join(ivle.conf.jail_src_base, '__temp__')
256
jail_src_base = config['paths']['jails']['src']
257
tempdir = os.path.join(jail_src_base, '__temp__')
204
258
if not os.path.exists(tempdir):
205
259
os.makedirs(tempdir)
206
260
elif not os.path.isdir(tempdir):
207
261
os.unlink(tempdir)
208
262
os.mkdir(tempdir)
209
userdir = os.path.join(ivle.conf.jail_src_base, user.login)
263
userdir = os.path.join(jail_src_base, user.login)
210
264
homedir = os.path.join(userdir, 'home')
265
tmpdir = os.path.join(userdir, 'tmp')
211
266
userhomedir = os.path.join(homedir, user.login) # Return value
213
268
if os.path.exists(userdir):
243
298
# Chmod to rwxr-xr-x (755)
244
299
os.chmod(userhomedir, 0755)
246
make_ivle_conf(user.login, userdir, user.svn_pass)
247
make_etc_passwd(user.login, userdir, ivle.conf.jail_system, user.unixid)
301
make_ivle_conf(user.login, userdir, user.svn_pass, config)
302
make_etc_passwd(user.login, userdir, config['paths']['jails']['template'],
305
os.chmod(tmpdir, 01777)
249
307
return userhomedir
251
def make_ivle_conf(username, user_jail_dir, svn_pass):
309
def make_ivle_conf(username, user_jail_dir, svn_pass, sys_config):
310
"""Generate an ivle.conf for a user's jail.
253
312
Creates (overwriting any existing file, and creating directories) a
254
313
file /etc/ivle/ivle.conf in a given user's jail.
256
user_jail_dir: User's jail dir, ie. ivle.conf.jail_base + username
257
svn_pass: User's SVN password.
315
@param username: Username.
316
@param user_jail_dir: User's jail dir, ie. ['jails']['src'] + username
317
@param svn_pass: User's SVN password.
318
@param sys_config: An ivle.config.Config object (the system-wide config).
259
conf_path = os.path.join(user_jail_dir, "etc/ivle/ivle.conf")
260
os.makedirs(os.path.dirname(conf_path))
320
conf_path = os.path.join(user_jail_dir, "home/.ivle.conf")
321
if not os.path.exists(os.path.dirname(conf_path)):
322
os.makedirs(os.path.dirname(conf_path))
262
324
# In the "in-jail" version of conf, we don't need MOST of the details
263
325
# (it would be a security risk to have them here).
264
326
# So we just write root_dir.
265
327
conf_obj = ivle.config.Config(blank=True)
266
328
conf_obj.filename = conf_path
267
conf_obj['urls']['root'] = ivle.conf.root_dir
268
conf_obj['urls']['public_host'] = ivle.conf.public_host
269
conf_obj['urls']['svn_addr'] = ivle.conf.svn_addr
329
conf_obj['urls'] = {}
330
conf_obj['urls']['root'] = sys_config['urls']['root']
331
conf_obj['urls']['public_host'] = sys_config['urls']['public_host']
332
conf_obj['urls']['svn_addr'] = sys_config['urls']['svn_addr']
333
conf_obj['user_info'] = {}
270
334
conf_obj['user_info']['login'] = username
271
335
conf_obj['user_info']['svn_pass'] = svn_pass