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'))
112
""" % {'login': login, 'id': psid, 'path': pspath})
114
for viewer_login in offering_viewers_cache[offeringid]:
115
# We don't want to override the owner's write privilege,
116
# so we don't add them to the read-only ACL.
117
if login != viewer_login:
118
f.write("%s = r\n" % viewer_login)
102
121
os.rename(temp_name, conf_name)
103
122
chown_to_webserver(conf_name)
105
124
def rebuild_svn_group_config(store, config):
106
125
"""Build the complete SVN configuration file for groups
107
127
@param config: An ivle.config.Config object.
109
129
conf_name = config['paths']['svn']['group_conf']
110
130
temp_name = conf_name + ".new"
111
131
f = open(temp_name, "w")
112
f.write("# IVLE SVN Group Repositories Configuration\n")
113
f.write("# Auto-generated on %s\n" % time.asctime())
134
# IVLE SVN group repository authorisation configuration
135
# Generated: %(time)s
137
""" % {'time': time.asctime()})
139
group_members_cache = {}
115
140
for group in store.find(ProjectGroup):
116
141
offering = group.project_set.offering
117
142
reponame = "_".join([offering.subject.short_name,
118
143
offering.semester.year,
119
144
offering.semester.semester,
121
f.write("[%s:/]\n"%reponame)
147
f.write("[%s:/]\n" % reponame)
148
if group.id not in group_members_cache:
149
group_members_cache[group.id] = set()
122
150
for user in group.members:
151
group_members_cache[group.id].add(user.login)
123
152
f.write("%s = rw\n" % user.login)
155
# Now we need to grant offering tutors and lecturers access to the latest
156
# submissions in their offerings. There are much prettier ways to do this,
157
# but a lot of browser requests call this function, so it needs to be
158
# fast. We can grab all of the paths needing authorisation directives with
159
# a single query, and we cache the list of viewers for each offering.
160
offering_viewers_cache = {}
161
for (ssn, year, sem, name, psid, pspath, gid, offeringid) in store.find(
162
(Subject.short_name, Semester.year, Semester.semester,
163
ProjectGroup.name, ProjectSubmission.id, ProjectSubmission.path,
164
ProjectGroup.id, Offering.id),
165
Assessed.id == ProjectSubmission.assessed_id,
166
ProjectGroup.id == Assessed.project_group_id,
167
Project.id == Assessed.project_id,
168
ProjectSet.id == Project.project_set_id,
169
Offering.id == ProjectSet.offering_id,
170
Subject.id == Offering.subject_id,
171
Semester.id == Offering.semester_id,
172
ProjectSubmission.date_submitted == Select(
173
Max(ProjectSubmission.date_submitted),
174
ProjectSubmission.assessed_id == Assessed.id,
175
tables=ProjectSubmission
179
reponame = "_".join([ssn, year, sem, name])
181
# Do we already have the list of logins authorised for this offering
182
# cached? If not, get it.
183
if offeringid not in offering_viewers_cache:
184
offering_viewers_cache[offeringid] = list(store.find(
186
User.id == Enrolment.user_id,
187
Enrolment.offering_id == offeringid,
188
Enrolment.role.is_in((u'tutor', u'lecturer'))
195
""" % {'repo': reponame, 'id': psid, 'path': pspath})
197
for viewer_login in offering_viewers_cache[offeringid]:
198
# Skip existing group members, or they can't write to it any more.
199
if viewer_login not in group_members_cache[gid]:
200
f.write("%s = r\n" % viewer_login)
126
203
os.rename(temp_name, conf_name)
127
204
chown_to_webserver(conf_name)
129
206
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.
207
"""Create a Subversion password for a user.
209
Generates a new random Subversion password, and assigns it to the user.
210
The password is added to Apache's Subversion authentication file.
133
212
# filename is, eg, /var/lib/ivle/svn/ivle.auth
134
213
filename = config['paths']['svn']['auth_ivle']
135
passwd = hashlib.md5(uuid.uuid4().bytes).hexdigest()
136
214
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,
219
user = User.get_by_login(store, login)
221
if user.svn_pass is None:
222
passwd = hashlib.md5(uuid.uuid4().bytes).hexdigest()
223
user.svn_pass = unicode(passwd)
225
res = subprocess.call(['htpasswd', '-%smb' % create,
226
filename, login, user.svn_pass])
146
227
if res != 0 and throw_on_error:
147
228
raise Exception("Unable to create ivle-auth for %s" % login)
150
231
if create == "c":
151
232
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.
236
def make_jail(user, config, force=True):
237
"""Create or update a user's jail.
239
Only the user-specific parts of the jail are created here - everything
240
else is expected to be part of another aufs branch.
191
242
Returns the path to the user's home directory.
193
244
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.
246
@param force: If False, raise an exception if the user already has a jail.
247
If True (default), rebuild the jail preserving /home.
198
249
# MUST run as root or some of this may fail
199
250
if os.getuid() != 0:
200
251
raise Exception("Must run make_jail as root")
202
253
# tempdir is for putting backup homes in
203
tempdir = os.path.join(ivle.conf.jail_src_base, '__temp__')
254
jail_src_base = config['paths']['jails']['src']
255
tempdir = os.path.join(jail_src_base, '__temp__')
204
256
if not os.path.exists(tempdir):
205
257
os.makedirs(tempdir)
206
258
elif not os.path.isdir(tempdir):
207
259
os.unlink(tempdir)
208
260
os.mkdir(tempdir)
209
userdir = os.path.join(ivle.conf.jail_src_base, user.login)
261
userdir = os.path.join(jail_src_base, user.login)
210
262
homedir = os.path.join(userdir, 'home')
263
tmpdir = os.path.join(userdir, 'tmp')
211
264
userhomedir = os.path.join(homedir, user.login) # Return value
213
266
if os.path.exists(userdir):
243
296
# Chmod to rwxr-xr-x (755)
244
297
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)
299
make_ivle_conf(user.login, userdir, user.svn_pass, config)
300
make_etc_passwd(user.login, userdir, config['paths']['jails']['template'],
303
os.chmod(tmpdir, 01777)
249
305
return userhomedir
251
def make_ivle_conf(username, user_jail_dir, svn_pass):
307
def make_ivle_conf(username, user_jail_dir, svn_pass, sys_config):
308
"""Generate an ivle.conf for a user's jail.
253
310
Creates (overwriting any existing file, and creating directories) a
254
311
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.
313
@param username: Username.
314
@param user_jail_dir: User's jail dir, ie. ['jails']['src'] + username
315
@param svn_pass: User's SVN password.
316
@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))
318
conf_path = os.path.join(user_jail_dir, "home/.ivle.conf")
319
if not os.path.exists(os.path.dirname(conf_path)):
320
os.makedirs(os.path.dirname(conf_path))
262
322
# In the "in-jail" version of conf, we don't need MOST of the details
263
323
# (it would be a security risk to have them here).
264
324
# So we just write root_dir.
265
325
conf_obj = ivle.config.Config(blank=True)
266
326
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
327
conf_obj['urls']['root'] = sys_config['urls']['root']
328
conf_obj['urls']['public_host'] = sys_config['urls']['public_host']
329
conf_obj['urls']['svn_addr'] = sys_config['urls']['svn_addr']
270
330
conf_obj['user_info']['login'] = username
271
331
conf_obj['user_info']['svn_pass'] = svn_pass