1 Information for packagers of KDEPIM
2 =====================================
4 This document gives some hints to packagers on what is needed to provide
5 a sane installation and packaging for KDEPIM.
7 Akonadi is a key component of KDEPIM that is used by almost all applications.
8 It depends on several components to be properly installed and configured,
9 which are listed below.
11 Also, this document discusses other topics which are of importance for
12 packagers, such as the GPG support.
17 Akonadi uses Nepomuk and Soprano for all kind of searches. Nepomuk itself
18 requires two storage backends for full functionality. Thus, these are
19 hard requirements for KDEPIM:
21 - Redland (for in-memory representation)
22 - Virtuoso (for persistent storage on hard-disk)
24 For the Redland backend you need librdf from http://librdf.org which should
25 be available as package for all major distributions already.
27 The Virtuoso backend has a compile time and runtime dependency, both must be
28 fulfilled. The compile time dependency is libiodbc which is available from
29 http://www.iodbc.org and packages for all distributions should be available.
30 The runtime dependency is the Virtuoso server version 5.0.12 that can be
31 retrieved from http://virtuoso.openlinksw.com. Although the Virtuoso sources
32 are huge, the compilation can be sped up by passing --disable-all-vads to
33 the configure script. After compilation has finished only the executable
34 virtuoso-t and the ODBC driver library virtodbc_r(.so) are needed for the
35 Soprano backend. We suggest splitting Virtuoso into several sub-packages,
36 two of which are the server binary and the ODBC drivers to not force the
37 user to install a full blown Virtuoso server.
39 Akonadi only requires Nepomuk, Strigi file indexing is not needed. You can
40 disable Strigi file indexing if you find that is uses too many resources. Only
41 the rest of Nepomuk needs to be running for Akonadi to work. Akonadi uses
42 some Strigi libraries to index e-mail content. These libraries are needed at
46 Shared Desktop Ontologies
47 --------------------------
48 Nepomuk and Akonadi need some semantic ontologies to know how to interpret the
49 content of Sopranos RDF store. These ontologies are available at
50 http://sourceforge.net/projects/oscaf/files and version 0.2 should be used.
55 Akonadi needs a relational database to keep metadata about the PIM data it
56 manages. There exists different backends for MySQL, PostgreSQL and SQLite.
57 While it might be tempting to use the SQLite backend to reduce dependencies,
58 we highly discourage to use it, because it is not yet finished, can lose
59 your data, has performance problems and is not automatically tested yet!
61 The PostgreSQL backend has some more testing, however we discourage the
62 use of it as well, because it will make the migration path much harder once
63 we'll switch to Virtuoso as SQL backend in the future. So please make MySQL a
64 hard (runtime) dependency for Akonadi and compile the Qt library with support
65 for MySQL (can be done as plugin as well).
70 Having a working installation of Nepomuk, Soprano, Virtuoso and MySQL should
71 normally result in a working installation of Akonadi. Akonadi provides a self
72 test dialog to make sure it really works. Please make sure all tests in this
73 self test dialog pass. The test can be found in a control center module that is
74 started with 'kcmshell4 kcm_akonadi'. The test is in the tab 'Akonadi Server
75 Configuration' and is started with the 'Test...' button.
80 (most of) The kdepim applications can use one or several Akonadi Resources in order
81 to fetch and store PIM data.
83 It is usually a good idea to install the kdepim-runtime package when installing
84 one of the KDEPIM applications. As the module name indicates, it is only needed at
87 The kdepim-runtime module contains applications and plugins, for example
88 Akonadi resources or KIO slaves, that are needed by all applications making use
89 of the PIM API in kdepimlibs.
91 Third-party applications which use the PIM API can be installed without installing
92 the rest of KDEPIM, only KDEPIM-Runtime (and of course kdepimlibs) is needed.
94 If you don't install KDEPIM-Runtime for third-party applications which use the PIM
95 API of kdepimlibs, these applications will fail to work at runtime.
97 Note that not all parts of kdepimlibs require KDEPIM-Runtime at runtime, only
98 the parts that access the Akonadi store in some way, like 'kcalcore', 'kabc' or
99 'akonadi'. Other parts, like 'kmime' or 'gpgme++' are not accessing the Akonadi
100 store and therefore don't need KDEPIM-Runtime.
105 Kontact is a container application which embeds other PIM applications such as
106 KMail and KOrganizer. For an application to be embedded in Kontact, it needs to
107 provide a Kontact plugin. These Kontact plugins reside under kontact/plugins,
108 while the applications itself are in the top-level folder. This is important
109 when splitting up the KDEPIM module in several packages. The Kontact plugin
110 should be packaged together with its application. It is an error to install a
111 Kontact plugin without installing the associated application, this will make
112 Kontact crash. As an example, assume you want to provide a separate package for
113 KNode. This package should contain KNode from the knode/ directory, and the
114 Kontact plugin from the kontact/plugins/knode directory. kontact/plugins/knode
115 should not be installed when knode/ is not installed.
120 Crypto operations are supported in multiple places in KDEPIM: KMail provides
121 support for dealing with signed and encrypted mails, and Kleopatra is an
122 application that manages certificates and GPG keys. For this to work, GPG needs
123 to be installed and configured correctly. An easy way to check if you have a
124 working GPG installation is to run the self test in Kleopatra, which checks many
125 aspects of the GPG installation. After starting Kleopatra, the self test can be
126 found in the menu under 'Settings->Perform Self Test'. Please make sure the self
127 test passes. Another way to test is sending an encrypted and signed message
128 with KMail, and later decrypting the received message. Note that saving as draft
129 is not enough here, you need to actually send the mail.
131 A common packaging error is that gpg-agent is not running or that it is wrongly
132 configured. This will result in KMail failing on crypto operations with error
133 messages that give no indication of the real problem, such as 'bad passphrase'.
136 Libraries inside KDEPIM
137 -----------------------
138 There are several libraries in the KDEPIM module, such as 'libkdepim', 'libkleo'
139 or 'libksieve'. There is no guarantee for a stable API or ABI in those
140 libraries. API and ABI stability is only guaranteed for kdepimlibs. The
141 libraries of the KDEPIM module are generally work in progress and therefore
142 change a lot, API and ABI breakage can occur at any moment.
144 Therefore, please make sure to always ship the libraries with the exact same
145 revision numbers as the applications. This is always the case for the tags
146 created for KDE SC versions.
148 As an example, shipping libkdepim from KDE SC 4.4.1 together with KMail from KDE
149 SC 4.4.2 is an error, and can result in failure at runtime, since this libkdepim
150 is not binary compatible with that KMail.
155 Some frequently occurring problems with Akonadi are collected under
156 http://userbase.kde.org/Akonadi#Some_Technical_Issues.
158 For further questions feel free to contact the KDE PIM developers on
159 kde-pim@kde.org or ask on freenode IRC channel #kontact or #akonadi