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@@ -1,223 +1,223 b'' | |||||
1 | # commandserver.py - communicate with Mercurial's API over a pipe |
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1 | # commandserver.py - communicate with Mercurial's API over a pipe | |
2 | # |
|
2 | # | |
3 | # Copyright Matt Mackall <mpm@selenic.com> |
|
3 | # Copyright Matt Mackall <mpm@selenic.com> | |
4 | # |
|
4 | # | |
5 | # This software may be used and distributed according to the terms of the |
|
5 | # This software may be used and distributed according to the terms of the | |
6 | # GNU General Public License version 2 or any later version. |
|
6 | # GNU General Public License version 2 or any later version. | |
7 |
|
7 | |||
8 | from i18n import _ |
|
8 | from i18n import _ | |
9 | import struct |
|
9 | import struct | |
10 | import sys |
|
10 | import sys | |
11 | import dispatch, encoding, util |
|
11 | import dispatch, encoding, util | |
12 |
|
12 | |||
13 | logfile = None |
|
13 | logfile = None | |
14 |
|
14 | |||
15 | def log(*args): |
|
15 | def log(*args): | |
16 | if not logfile: |
|
16 | if not logfile: | |
17 | return |
|
17 | return | |
18 |
|
18 | |||
19 | for a in args: |
|
19 | for a in args: | |
20 | logfile.write(str(a)) |
|
20 | logfile.write(str(a)) | |
21 |
|
21 | |||
22 | logfile.flush() |
|
22 | logfile.flush() | |
23 |
|
23 | |||
24 | class channeledoutput(object): |
|
24 | class channeledoutput(object): | |
25 | """ |
|
25 | """ | |
26 | Write data from in_ to out in the following format: |
|
26 | Write data from in_ to out in the following format: | |
27 |
|
27 | |||
28 | data length (unsigned int), |
|
28 | data length (unsigned int), | |
29 | data |
|
29 | data | |
30 | """ |
|
30 | """ | |
31 | def __init__(self, in_, out, channel): |
|
31 | def __init__(self, in_, out, channel): | |
32 | self.in_ = in_ |
|
32 | self.in_ = in_ | |
33 | self.out = out |
|
33 | self.out = out | |
34 | self.channel = channel |
|
34 | self.channel = channel | |
35 |
|
35 | |||
36 | def write(self, data): |
|
36 | def write(self, data): | |
37 | if not data: |
|
37 | if not data: | |
38 | return |
|
38 | return | |
39 | self.out.write(struct.pack('>cI', self.channel, len(data))) |
|
39 | self.out.write(struct.pack('>cI', self.channel, len(data))) | |
40 | self.out.write(data) |
|
40 | self.out.write(data) | |
41 | self.out.flush() |
|
41 | self.out.flush() | |
42 |
|
42 | |||
43 | def __getattr__(self, attr): |
|
43 | def __getattr__(self, attr): | |
44 | if attr in ('isatty', 'fileno'): |
|
44 | if attr in ('isatty', 'fileno'): | |
45 | raise AttributeError, attr |
|
45 | raise AttributeError, attr | |
46 | return getattr(self.in_, attr) |
|
46 | return getattr(self.in_, attr) | |
47 |
|
47 | |||
48 | class channeledinput(object): |
|
48 | class channeledinput(object): | |
49 | """ |
|
49 | """ | |
50 | Read data from in_. |
|
50 | Read data from in_. | |
51 |
|
51 | |||
52 | Requests for input are written to out in the following format: |
|
52 | Requests for input are written to out in the following format: | |
53 | channel identifier - 'I' for plain input, 'L' line based (1 byte) |
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53 | channel identifier - 'I' for plain input, 'L' line based (1 byte) | |
54 | how many bytes to send at most (unsigned int), |
|
54 | how many bytes to send at most (unsigned int), | |
55 |
|
55 | |||
56 | The client replies with: |
|
56 | The client replies with: | |
57 | data length (unsigned int), 0 meaning EOF |
|
57 | data length (unsigned int), 0 meaning EOF | |
58 | data |
|
58 | data | |
59 | """ |
|
59 | """ | |
60 |
|
60 | |||
61 | maxchunksize = 4 * 1024 |
|
61 | maxchunksize = 4 * 1024 | |
62 |
|
62 | |||
63 | def __init__(self, in_, out, channel): |
|
63 | def __init__(self, in_, out, channel): | |
64 | self.in_ = in_ |
|
64 | self.in_ = in_ | |
65 | self.out = out |
|
65 | self.out = out | |
66 | self.channel = channel |
|
66 | self.channel = channel | |
67 |
|
67 | |||
68 | def read(self, size=-1): |
|
68 | def read(self, size=-1): | |
69 | if size < 0: |
|
69 | if size < 0: | |
70 | # if we need to consume all the clients input, ask for 4k chunks |
|
70 | # if we need to consume all the clients input, ask for 4k chunks | |
71 | # so the pipe doesn't fill up risking a deadlock |
|
71 | # so the pipe doesn't fill up risking a deadlock | |
72 | size = self.maxchunksize |
|
72 | size = self.maxchunksize | |
73 | s = self._read(size, self.channel) |
|
73 | s = self._read(size, self.channel) | |
74 | buf = s |
|
74 | buf = s | |
75 | while s: |
|
75 | while s: | |
|
76 | s = self._read(size, self.channel) | |||
76 | buf += s |
|
77 | buf += s | |
77 | s = self._read(size, self.channel) |
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|||
78 |
|
78 | |||
79 | return buf |
|
79 | return buf | |
80 | else: |
|
80 | else: | |
81 | return self._read(size, self.channel) |
|
81 | return self._read(size, self.channel) | |
82 |
|
82 | |||
83 | def _read(self, size, channel): |
|
83 | def _read(self, size, channel): | |
84 | if not size: |
|
84 | if not size: | |
85 | return '' |
|
85 | return '' | |
86 | assert size > 0 |
|
86 | assert size > 0 | |
87 |
|
87 | |||
88 | # tell the client we need at most size bytes |
|
88 | # tell the client we need at most size bytes | |
89 | self.out.write(struct.pack('>cI', channel, size)) |
|
89 | self.out.write(struct.pack('>cI', channel, size)) | |
90 | self.out.flush() |
|
90 | self.out.flush() | |
91 |
|
91 | |||
92 | length = self.in_.read(4) |
|
92 | length = self.in_.read(4) | |
93 | length = struct.unpack('>I', length)[0] |
|
93 | length = struct.unpack('>I', length)[0] | |
94 | if not length: |
|
94 | if not length: | |
95 | return '' |
|
95 | return '' | |
96 | else: |
|
96 | else: | |
97 | return self.in_.read(length) |
|
97 | return self.in_.read(length) | |
98 |
|
98 | |||
99 | def readline(self, size=-1): |
|
99 | def readline(self, size=-1): | |
100 | if size < 0: |
|
100 | if size < 0: | |
101 | size = self.maxchunksize |
|
101 | size = self.maxchunksize | |
102 | s = self._read(size, 'L') |
|
102 | s = self._read(size, 'L') | |
103 | buf = s |
|
103 | buf = s | |
104 | # keep asking for more until there's either no more or |
|
104 | # keep asking for more until there's either no more or | |
105 | # we got a full line |
|
105 | # we got a full line | |
106 | while s and s[-1] != '\n': |
|
106 | while s and s[-1] != '\n': | |
|
107 | s = self._read(size, 'L') | |||
107 | buf += s |
|
108 | buf += s | |
108 | s = self._read(size, 'L') |
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|||
109 |
|
109 | |||
110 | return buf |
|
110 | return buf | |
111 | else: |
|
111 | else: | |
112 | return self._read(size, 'L') |
|
112 | return self._read(size, 'L') | |
113 |
|
113 | |||
114 | def __iter__(self): |
|
114 | def __iter__(self): | |
115 | return self |
|
115 | return self | |
116 |
|
116 | |||
117 | def next(self): |
|
117 | def next(self): | |
118 | l = self.readline() |
|
118 | l = self.readline() | |
119 | if not l: |
|
119 | if not l: | |
120 | raise StopIteration |
|
120 | raise StopIteration | |
121 | return l |
|
121 | return l | |
122 |
|
122 | |||
123 | def __getattr__(self, attr): |
|
123 | def __getattr__(self, attr): | |
124 | if attr in ('isatty', 'fileno'): |
|
124 | if attr in ('isatty', 'fileno'): | |
125 | raise AttributeError, attr |
|
125 | raise AttributeError, attr | |
126 | return getattr(self.in_, attr) |
|
126 | return getattr(self.in_, attr) | |
127 |
|
127 | |||
128 | class server(object): |
|
128 | class server(object): | |
129 | """ |
|
129 | """ | |
130 | Listens for commands on stdin, runs them and writes the output on a channel |
|
130 | Listens for commands on stdin, runs them and writes the output on a channel | |
131 | based stream to stdout. |
|
131 | based stream to stdout. | |
132 | """ |
|
132 | """ | |
133 | def __init__(self, ui, repo, mode): |
|
133 | def __init__(self, ui, repo, mode): | |
134 | self.ui = ui |
|
134 | self.ui = ui | |
135 |
|
135 | |||
136 | logpath = ui.config("cmdserver", "log", None) |
|
136 | logpath = ui.config("cmdserver", "log", None) | |
137 | if logpath: |
|
137 | if logpath: | |
138 | global logfile |
|
138 | global logfile | |
139 | if logpath == '-': |
|
139 | if logpath == '-': | |
140 | # write log on a special 'd'ebug channel |
|
140 | # write log on a special 'd'ebug channel | |
141 | logfile = channeledoutput(sys.stdout, sys.stdout, 'd') |
|
141 | logfile = channeledoutput(sys.stdout, sys.stdout, 'd') | |
142 | else: |
|
142 | else: | |
143 | logfile = open(logpath, 'a') |
|
143 | logfile = open(logpath, 'a') | |
144 |
|
144 | |||
145 | self.repo = repo |
|
145 | self.repo = repo | |
146 |
|
146 | |||
147 | if mode == 'pipe': |
|
147 | if mode == 'pipe': | |
148 | self.cerr = channeledoutput(sys.stderr, sys.stdout, 'e') |
|
148 | self.cerr = channeledoutput(sys.stderr, sys.stdout, 'e') | |
149 | self.cout = channeledoutput(sys.stdout, sys.stdout, 'o') |
|
149 | self.cout = channeledoutput(sys.stdout, sys.stdout, 'o') | |
150 | self.cin = channeledinput(sys.stdin, sys.stdout, 'I') |
|
150 | self.cin = channeledinput(sys.stdin, sys.stdout, 'I') | |
151 | self.cresult = channeledoutput(sys.stdout, sys.stdout, 'r') |
|
151 | self.cresult = channeledoutput(sys.stdout, sys.stdout, 'r') | |
152 |
|
152 | |||
153 | self.client = sys.stdin |
|
153 | self.client = sys.stdin | |
154 | else: |
|
154 | else: | |
155 | raise util.Abort(_('unknown mode %s') % mode) |
|
155 | raise util.Abort(_('unknown mode %s') % mode) | |
156 |
|
156 | |||
157 | def _read(self, size): |
|
157 | def _read(self, size): | |
158 | if not size: |
|
158 | if not size: | |
159 | return '' |
|
159 | return '' | |
160 |
|
160 | |||
161 | data = self.client.read(size) |
|
161 | data = self.client.read(size) | |
162 |
|
162 | |||
163 | # is the other end closed? |
|
163 | # is the other end closed? | |
164 | if not data: |
|
164 | if not data: | |
165 | raise EOFError() |
|
165 | raise EOFError() | |
166 |
|
166 | |||
167 | return data |
|
167 | return data | |
168 |
|
168 | |||
169 | def runcommand(self): |
|
169 | def runcommand(self): | |
170 | """ reads a list of \0 terminated arguments, executes |
|
170 | """ reads a list of \0 terminated arguments, executes | |
171 | and writes the return code to the result channel """ |
|
171 | and writes the return code to the result channel """ | |
172 |
|
172 | |||
173 | length = struct.unpack('>I', self._read(4))[0] |
|
173 | length = struct.unpack('>I', self._read(4))[0] | |
174 | if not length: |
|
174 | if not length: | |
175 | args = [] |
|
175 | args = [] | |
176 | else: |
|
176 | else: | |
177 | args = self._read(length).split('\0') |
|
177 | args = self._read(length).split('\0') | |
178 |
|
178 | |||
179 | # copy the ui so changes to it don't persist between requests |
|
179 | # copy the ui so changes to it don't persist between requests | |
180 | req = dispatch.request(args, self.ui.copy(), self.repo, self.cin, |
|
180 | req = dispatch.request(args, self.ui.copy(), self.repo, self.cin, | |
181 | self.cout, self.cerr) |
|
181 | self.cout, self.cerr) | |
182 |
|
182 | |||
183 | ret = dispatch.dispatch(req) or 0 # might return None |
|
183 | ret = dispatch.dispatch(req) or 0 # might return None | |
184 |
|
184 | |||
185 | self.cresult.write(struct.pack('>i', int(ret))) |
|
185 | self.cresult.write(struct.pack('>i', int(ret))) | |
186 |
|
186 | |||
187 | def getencoding(self): |
|
187 | def getencoding(self): | |
188 | """ writes the current encoding to the result channel """ |
|
188 | """ writes the current encoding to the result channel """ | |
189 | self.cresult.write(encoding.encoding) |
|
189 | self.cresult.write(encoding.encoding) | |
190 |
|
190 | |||
191 | def serveone(self): |
|
191 | def serveone(self): | |
192 | cmd = self.client.readline()[:-1] |
|
192 | cmd = self.client.readline()[:-1] | |
193 | if cmd: |
|
193 | if cmd: | |
194 | handler = self.capabilities.get(cmd) |
|
194 | handler = self.capabilities.get(cmd) | |
195 | if handler: |
|
195 | if handler: | |
196 | handler(self) |
|
196 | handler(self) | |
197 | else: |
|
197 | else: | |
198 | # clients are expected to check what commands are supported by |
|
198 | # clients are expected to check what commands are supported by | |
199 | # looking at the servers capabilities |
|
199 | # looking at the servers capabilities | |
200 | raise util.Abort(_('unknown command %s') % cmd) |
|
200 | raise util.Abort(_('unknown command %s') % cmd) | |
201 |
|
201 | |||
202 | return cmd != '' |
|
202 | return cmd != '' | |
203 |
|
203 | |||
204 | capabilities = {'runcommand' : runcommand, |
|
204 | capabilities = {'runcommand' : runcommand, | |
205 | 'getencoding' : getencoding} |
|
205 | 'getencoding' : getencoding} | |
206 |
|
206 | |||
207 | def serve(self): |
|
207 | def serve(self): | |
208 | hellomsg = 'capabilities: ' + ' '.join(self.capabilities.keys()) |
|
208 | hellomsg = 'capabilities: ' + ' '.join(self.capabilities.keys()) | |
209 | hellomsg += '\n' |
|
209 | hellomsg += '\n' | |
210 | hellomsg += 'encoding: ' + encoding.encoding |
|
210 | hellomsg += 'encoding: ' + encoding.encoding | |
211 |
|
211 | |||
212 | # write the hello msg in -one- chunk |
|
212 | # write the hello msg in -one- chunk | |
213 | self.cout.write(hellomsg) |
|
213 | self.cout.write(hellomsg) | |
214 |
|
214 | |||
215 | try: |
|
215 | try: | |
216 | while self.serveone(): |
|
216 | while self.serveone(): | |
217 | pass |
|
217 | pass | |
218 | except EOFError: |
|
218 | except EOFError: | |
219 | # we'll get here if the client disconnected while we were reading |
|
219 | # we'll get here if the client disconnected while we were reading | |
220 | # its request |
|
220 | # its request | |
221 | return 1 |
|
221 | return 1 | |
222 |
|
222 | |||
223 | return 0 |
|
223 | return 0 |
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