use line interpolation to create centroid for lines

[nominatim.git] / CONTRIBUTING.md

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
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--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,24 +1,44 @@
 # Nominatim contribution guidelines
 
 # Nominatim contribution guidelines
 

-## Workflow
+## Reporting Bugs

 
 

-We operate the "Fork & Pull" model explained at
+Bugs can be reported at https://github.com/openstreetmap/Nominatim/issues.
+Please always open a separate issue for each problem. In particular, do
+not add your bugs to closed issues. They may looks similar to you but
+often are completely different from the maintainer's point of view.
+
+## Workflow for Pull Requests
+
+We love to get pull requests from you. We operate the "Fork & Pull" model
+explained at

 
 https://help.github.com/articles/using-pull-requests
 
 You should fork the project into your own repo, create a topic branch
 there and then make one or more pull requests back to the openstreetmap repository.
 
 https://help.github.com/articles/using-pull-requests
 
 You should fork the project into your own repo, create a topic branch
 there and then make one or more pull requests back to the openstreetmap repository.

-Your pull requests will then be reviewed and discussed.
+Your pull requests will then be reviewed and discussed. Please be aware
+that you are responsible for your pull requests. You should be prepared
+to get change requests because as the maintainers we have to make sure
+that your contribution fits well with the rest of the code. Please make
+sure that you have time to react to these comments and amend the code or
+engage in a conversion. Do not expect that others will pick up your code,
+it will almost never happen.
+
+Please open a separate pull request for each issue you want to address.
+Don't mix multiple changes. In particular, don't mix style cleanups with
+feature pull requests. If you plan to make larger changes, please open
+an issue first or comment on the appropriate issue already existing so
+that duplicate work can be avoided.

 
 ## Coding style
 
 Nominatim historically hasn't followed a particular coding style but we
 
 ## Coding style
 
 Nominatim historically hasn't followed a particular coding style but we

-are in process of consolodating the style. The following rules apply:
+are in process of consolidating the style. The following rules apply:

 
  * Python code uses the official Python style
 
  * Python code uses the official Python style

- * indention
+ * indentation

    * SQL use 2 spaces
    * SQL use 2 spaces

-   * all other use files TABs
+   * all other file types use 4 spaces

    * [BSD style](https://en.wikipedia.org/wiki/Indent_style#Allman_style) for braces
  * spaces
    * spaces before and after equal signs and operators
    * [BSD style](https://en.wikipedia.org/wiki/Indent_style#Allman_style) for braces
  * spaces
    * spaces before and after equal signs and operators


@@ -26,22 +46,60 @@ are in process of consolodating the style. The following rules apply:
    * no spaces after opening and before closing bracket
    * leave out space between a function name and bracket
      but add one between control statement(if, while, etc.) and bracket
    * no spaces after opening and before closing bracket
    * leave out space between a function name and bracket
      but add one between control statement(if, while, etc.) and bracket

+ * for PHP variables use CamelCase with a prefixing letter indicating the type
+   (i - integer, f - float, a - array, s - string, o - object)

 
 

+The coding style is enforced with PHPCS and pylint. It can be tested with:

 
 

-This coding style must be applied to any new or changed code. You are also
-welcome to fix the coding style of existing code but please submit separate
-PRs for this.
+```
+phpcs --report-width=120 --colors .
+pylint3 --extension-pkg-whitelist=osmium nominatim
+```

 
 ## Testing
 
 
 ## Testing
 

-Before submitting a pull request make sure that the following tests pass:
+Before submitting a pull request make sure that the tests pass:

 
 ```
 
 ```

-  cd tests
-  NOMINATIM_DIR=<builddir> lettuce -t -Fail features/db features/osm2pgsql
+  make tests

 ```
 
 ```
 

-```
-  cd test-php
-  phpunit ./
-```
+## Releases
+
+Nominatim follows semantic versioning. Major releases are done for large changes
+that require (or at least strongly recommend) a reimport of the databases.
+Minor releases can usually be applied to existing databases. Patch releases
+contain bug fixes only and are released from a separate branch where the
+relevant changes are cherry-picked from the master branch.
+
+Checklist for releases:
+
+* [ ] increase versions in
+  * `src/nominatim_api/version.py`
+  * `src/nominatim_db/version.py`
+  * CMakeLists.txt
+* [ ] update `ChangeLog` (copy information from patch releases from release branch)
+* [ ] complete `docs/admin/Migration.md`
+* [ ] update EOL dates in `SECURITY.md`
+* [ ] commit and make sure CI tests pass
+* [ ] test migration
+  * download, build and import previous version
+  * migrate using master version
+  * run updates using master version
+* [ ] prepare tarball:
+  * `git clone --recursive https://github.com/osm-search/Nominatim` (switch to right branch!)
+  * `rm -r .git* osm2pgsql/.git*`
+  * copy country data into `data/`
+  * add version to base directory and package
+* [ ] upload tarball to https://nominatim.org
+* [ ] prepare documentation
+  * check out new docs branch
+  * change git checkout instructions to tarball download instructions or adapt version on existing ones
+  * build documentation and copy to https://github.com/osm-search/nominatim-org-site
+  * add new version to history
+* [ ] check release tarball
+  * download tarball as per new documentation instructions
+  * compile and import Nominatim
+  * run `nominatim --version` to confirm correct version
+* [ ] tag new release and add a release on github.com
+* [ ] build pip packages and upload to pypi