How to write the license

GNU license

The structure of a license in .c, .cpp, .h, .hpp, .sql

/*PGR-GNU*****************************************************************

<developer data>

------
<license body> 
 *******************************************************************PGR-GNU*/

• For logical changes on the file please add the appropriate additional developer data lines
• For formatting changes do not add developer data lines
• For file renaming
  • do not add developer data lines
  • adjust the file name line
• When Joining files into one
  • keep all the developer data lines of all the joined files
  • adjust the file name line
  • If one file has a copy right for pgRouting developers adjust to the lowest year from all copyrights
• When not phisically joining but logically joining files to be removed later
  • keep all the developer data lines of all the logically joined files

developer data

• with the year,
• developer name
  • when not wanted to publish personal name
    • Use github nick
    • OR use "pgRouting developers"
• developer mail
• Use "at" instead of "@"
• use project@pgrouting.org when not wanted to publish personal e-mail

license body

Currently the license body is

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

Complete license example

/*PGR-GNU*****************************************************************

File: _pgr_foo.sql

Copyright (c) <year> pgRouting developers
Mail: project@pgrouting.org

Function's developer:
Copyright (c) <year> <developer name>
Mail: <developer mail>

------
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 ********************************************************************PGR-GNU*/

TODO

More file types licenses rules