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91d9a42d | 1 | Dependencies: |
2 | ||
3 | * You'll need, in addition to the packages mentioned in README: | |
4 | Automake 1.10 1.7 is no good; 1.8/9 might work | |
5 | Autoconf 2.61 Slightly older might work too | |
6 | Libtool 1.5.22 1.4 is no good | |
7 | Bazaar (bzr) You might be able to manage without | |
8 | Python 2.4 | |
9 | ||
10 | * On Debian and derivatives this should work: | |
11 | ||
12 | apt-get install gcc libc-dev automake autoconf libtool libgtk2.0-dev \ | |
13 | libgc-dev libgcrypt-dev libpcre3-dev libvorbis-dev \ | |
14 | libao-dev libmad0-dev libasound2-dev libdb4.3-dev \ | |
15 | libflac-dev | |
16 | ||
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17 | * On FreeBSD you'll need at least these packages: |
18 | autotools | |
19 | bash | |
20 | flac | |
21 | mad | |
22 | boehm-gc | |
23 | db43 | |
24 | gmake | |
25 | gsed | |
26 | libao | |
27 | libgcrypt | |
28 | wget | |
29 | vorbis-tools | |
30 | ||
91d9a42d | 31 | * Please report unstated dependencies (here, README or debian/control). |
32 | ||
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33 | Building: |
34 | ||
35 | * Compiled versions of configure and the makefiles are including in bzr, so | |
36 | if you didn't use a source tarball, you must start as follows: | |
37 | ||
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38 | bash ./prepare |
39 | ./configure -C | |
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40 | make |
41 | ||
42 | * On FreeBSD you must use gmake. | |
43 | ||
91d9a42d | 44 | Testing: |
45 | ||
46 | * There is an extensive test suite in lib/test.c and tests/*.py. You can | |
47 | run the tests with 'make check'. If possible please add tests for new | |
48 | code to at least one of these. At the very least the existing tests | |
49 | should continue to pass. | |
50 | ||
51 | * The tests will not currently pass in an ASCII locale. This is essentially | |
52 | unavoidable given the need to test Unicode support. ISO 8859-1 or UTF-8 | |
53 | locales should be OK for the time being. | |
54 | ||
55 | APIs And Formats: | |
56 | ||
57 | * To support a new sound API: | |
58 | 1) Teach configure.ac how to detect any libraries required. | |
59 | 2) Define a new BACKEND_ value and update configuration.[ch] for it. | |
60 | 3) Create a suitable server/speaker-*.c along the pattern of the existing | |
61 | ones. | |
62 | 4) If possible create a suitable lib/mixer-*.c. This doesn't make sense | |
63 | for all APIs (e.g. network), but even for those it does, playback | |
64 | support without volume control support is likely to be acceptable (even | |
65 | if inferior to full support). | |
66 | 5) Update doc/disorder_config.5.in. | |
67 | 6) If relevant, create a suitable clients/playrtp-*.c and update | |
68 | doc/disorder-playrtp.1.in. | |
69 | ||
70 | * To support a new file format: | |
71 | 1) Teach configure.ac how to detect any libraries required. | |
72 | 2) Add a new section to server/decode.c. NB this file may be split into | |
73 | several bits one day. | |
74 | 3) Add a new section to plugins/tracklength.c. Again this file may be | |
75 | split up in a future version. | |
76 | 4) Update default_players[] in lib/configuration.c. | |
77 | 5) Update doc/disorder_config.5.in. | |
78 | ||
79 | The Server: | |
80 | ||
81 | * The server's command implementations must not block. Waiting for a little | |
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82 | disk IO is OK but blocking for extended periods on long-lasting |
83 | transactions or external resources is not acceptable; it will wedge the | |
84 | server for all other users. | |
85 | ||
86 | Long-running subprocesses should use subprograms (rather than forking but | |
87 | not execing) if reasonably possible; see c_stats() for an example. | |
88 | c_reminder() is probably in the grey area. | |
91d9a42d | 89 | |
90 | * The server process does not use threads and I would like to keep it that | |
91 | way. | |
92 | ||
93 | * The server uses the Boehm garbage collector. This eliminates the need to | |
94 | call free() and similar functions in many cases, though teardown calls to | |
95 | that do more than free GC-allocated memory (such as fclose()) are still | |
96 | required. | |
97 | ||
98 | * DisOrder's *printf calls, such as byte_xasprintf(), are mostly preferred | |
99 | within the server to the ones built into libc. An important distinction | |
100 | is that they will always accept UTF-8 strings whereas the built-in ones | |
101 | may reject them in non-UTF-8 locales (for instance Glibc does this) with | |
102 | EILSEQ. Only where the data is guaranteed to be ASCII may the libc | |
103 | functions be used. | |
104 | ||
105 | * To add a new configuration directive: | |
106 | 1) Add a new entry to the struct in lib/configuration.h | |
107 | 2) Add a new table entry to conf[] in lib/configuration.c | |
108 | 3) If the directive is entirely unlike existing ones add a new type_ | |
109 | to lib/configuration.c | |
110 | 4) Set the default if non-0 in config_default(). In some cases | |
111 | config_postdefaults() may be more appropriate. | |
112 | 5) Document the new directive in doc/disorder_config.5.in | |
113 | ||
114 | * To add a new command: | |
115 | 1) Add a new c_ function and table entry in server/server.c | |
116 | 2) Document the new command in doc/disorder_protocol.5.in | |
117 | 3) Add a new function to lib/client.c | |
118 | 4) Add a new function to lib/eclient.c | |
119 | 5) Add a new function to python/disorder.py.in | |
120 | 6) Add a new command to clients/disorder.c and update doc/disorder.1.in | |
121 | 7) Add a new test somewhere in tests/*.py | |
122 | Depending on the purpose of the command it may be acceptable to leave out | |
123 | some of the client side work - for instance commands only ever used by the | |
124 | web interface are not implemented in lib/eclient.c. | |
125 | ||
126 | * See disorder_protocol(5) for details of how the status code is | |
127 | constructed, and the existing commands for examples. | |
128 | ||
129 | * If the command needs a new right to be defined then update lib/rights.[ch] | |
130 | and doc/disorder_config.5.in. New rights should definitely be mentioned | |
131 | in README.upgrades as existing users will not automatically get new rights | |
132 | even if they are in default_rights. If the new right should not be in | |
133 | default_rights by default then you must update config_postdefaults(). | |
134 | ||
135 | Web Interface: | |
136 | ||
137 | * The web interface does not use Javascript or Flash and I would like to | |
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138 | keep it that way. Clever use of CSS is OK provided it works well on the |
139 | mainstream browsers. | |
91d9a42d | 140 | |
141 | * I know that the web template syntax is rather nasty. Perhaps it will be | |
142 | improved in a future version. | |
143 | ||
144 | * Update templates/help.html for any changes you make. | |
145 | ||
146 | Disobedience: | |
147 | ||
148 | * Disobedience does not currently use threads and I'd prefer to keep it that | |
149 | way. | |
150 | ||
151 | * Disobedience uses the Boehm garbage collector but not for GTK+/GLIB's | |
152 | memory allocation, as they are incompatible with it. So you still have to | |
153 | do somewhat manual memory management for GTK+ objects. Fortunately it has | |
154 | its own refcounting system which does most of the work for you. | |
155 | ||
156 | * Lengthy operations must not block. In practice this seems to be a less of | |
157 | a problem for Disobedience than the server. Use the GLIB event loop to | |
158 | deal with long-running operations if you do need any. | |
159 | ||
160 | * Update doc/disobedience.1.in for any changes you make. | |
161 | ||
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162 | New Platforms: |
163 | ||
164 | * It is not mandatory to have an entry in configure's 'case $host' section, | |
165 | but may well be convenient. | |
166 | ||
167 | * Complete support for a new platform implies updating scripts/setup.in and | |
168 | scripts/teardown.in as well as getting the software to build and work (but | |
169 | this doesn't mean that patches that don't achieve this will be rejected). | |
170 | ||
91d9a42d | 171 | Code And Patches: |
172 | ||
173 | * Please follow the existing layout conventions. | |
174 | ||
175 | * Please try to write doc comments for new functions, types, etc using the | |
176 | same syntax as the existing ones. Doxygen can be used to turn this into | |
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177 | reference documentation (see http://www.stack.nl/~dimitri/doxygen/) but |
178 | really the point is to have good inline code documentation, not the | |
179 | Doxygen output as such. | |
91d9a42d | 180 | |
181 | * More importantly, new configuration directives, protocol commands, | |
182 | interface features etc should be documented in the relevant places. | |
183 | ||
184 | * If you add new dependencies please update README, README.developers and | |
185 | debian/control. | |
186 | ||
187 | * New dependencies that are not in Debian stable are likely to be rejected. | |
188 | (But if your new feature only makes sense on a given platform then | |
189 | obviously its new dependencies don't need to be available elsewhere.) | |
190 | ||
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191 | * GCC is stated as a dependency. In fact the code is mostly standard C, |
192 | with C99 initializers, long long and possibly the occasional // comment as | |
193 | the main departures from C89. Additional GCCisms will be accepted if it's | |
194 | impractical to avoid them. At least one active user is still using GCC | |
195 | 2.95, so extensions that only appear in later versions are to be avoided | |
196 | for the time being. | |
197 | ||
91d9a42d | 198 | * Please submit patches either using 'diff -u', or by publishing a bzr |
199 | branch somewhere I can get at it. | |
200 | ||
201 | * Please make it clear that your changes can be distributed under DisOrder's | |
202 | licence (which is "GPL v2 or later"). | |
203 | ||
204 | Local Variables: | |
205 | mode:text | |
206 | fill-column:79 | |
207 | End: |