clixon/develop.md

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# README for developers Clixon developers
1. How to document the code
2. How to work in git (branching)
3. How the meta-configure stuff works
4. How to debug
## How to document the code
```
/*! This is a small comment on one line
*
* This is a detailed description
* spanning several lines.
*
* Example usage:
* @code
* fn(a, &b);
* @endcode
*
* @param[in] src This is a description of the first parameter
* @param[in,out] dest This is a description of the second parameter
* @retval TRUE This is a description of the return value
* @retval FALSE This is a description of another return value
* @see See also this function
*/
```
## How to work in git (branching)
Basically follows: http://nvie.com/posts/a-successful-git-branching-model/
only somewhat simplified:
Do commits in develop branch. When done, merge with master.
## How the meta-configure stuff works
```
configure.ac --.
| .------> autoconf* -----> configure
[aclocal.m4] --+---+
| `-----> [autoheader*] --> [config.h.in]
[acsite.m4] ---'
.-------------> [config.cache]
configure* ------------+-------------> config.log
|
[config.h.in] -. v .-> [config.h] -.
+--> config.status* -+ +--> make*
Makefile.in ---' `-> Makefile ---'
```
## How to debug
### Make your own simplified yang and configuration file.
```
cat <<EOF > /tmp/my.yang
module mymodule{
container x {
list y {
key "a";
leaf a {
type string;
}
}
}
}
EOF
cat <<EOF > /tmp/myconf.xml
<config>
<CLICON_CONFIGFILE>/tmp/myconf.xml</CLICON_CONFIGFILE>
<CLICON_YANG_DIR>/usr/local/share/example/yang</CLICON_YANG_DIR>
<CLICON_YANG_MODULE_MAIN>example</CLICON_YANG_MODULE_MAIN>
<CLICON_SOCK>/usr/local/var/example/example.sock</CLICON_SOCK>
<CLICON_BACKEND_PIDFILE>/usr/local/var/example/example.pidfile</CLICON_BACKEND_PIDFILE>
<CLICON_XMLDB_DIR>/usr/local/var/example</CLICON_XMLDB_DIR>
<CLICON_XMLDB_PLUGIN>/usr/local/lib/xmldb/text.so</CLICON_XMLDB_PLUGIN>
</config>
EOF
sudo clixon_backend -F -s init -f /tmp/myconf.xml -y /tmp/my.yang
```
### Run valgrind and callgrind
```
valgrind --leak-check=full --show-leak-kinds=all clixon_netconf -qf /tmp/myconf.xml -y /tmp/my.yang
valgrind --tool=callgrind clixon_netconf -qf /tmp/myconf.xml -y /tmp/my.yang
sudo kcachegrind
```