83 lines
2.4 KiB
Markdown
83 lines
2.4 KiB
Markdown
# Contributing guide
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## How to add new functions
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Try to put as little logic in the SQL extension as possible and
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just use it as a wrapper to the Python module functionality.
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Once a function is defined it should never change its signature in subsequent
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versions. To change a function's signature a new function with a different
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name must be created.
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### Version numbers
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The version of both the SQL extension and the Python package shall
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follow the[Semantic Versioning 2.0](http://semver.org/) guidelines:
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* When backwards incompatibility is introduced the major number is incremented
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* When functionally is added (in a backwards-compatible manner) the minor number
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is incremented
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* When only fixes are introduced (backwards-compatible) the patch number is
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incremented
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### Python Package
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...
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### SQL Extension
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* Generate a **new subfolder version** for `sql` and `test` folders to define
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the new functions and tests
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- Use symlinks to avoid file duplication between versions that don't update them
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- Add new files or modify copies of the old files to add new functions or
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modify existing functions (remember to rename a function if the signature
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changes)
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- Add or modify the corresponding documentation files in the `doc` folder.
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Since we expect to have highly technical functions here, an extense
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background explanation would be of great help to users of this extension.
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- Create tests for the new functions/behaviour
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* Generate the **upgrade and downgrade files** for the extension
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* Update the control file and the Makefile to generate the complete SQL
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file for the new created version. After running `make` a new
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file `crankshaft--X.Y.Z.sql` will be created for the current version.
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Additional files for migrating to/from the previous version A.B.Z should be
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created:
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- `crankshaft--X.Y.Z--A.B.C.sql`
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- `crankshaft--A.B.C--X.Y.Z.sql`
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All these new files must be added to git and pushed.
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* Update the public docs! ;-)
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## Conventions
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# SQL
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Use snake case (i.e. `snake_case` and not `CamelCase`) for all
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functions. Prefix functions intended for public use with `cdb_`
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and private functions (to be used only internally inside
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the extension) with `_cdb_`.
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# Python
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...
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## Testing
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Running the Python tests:
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```
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cd python/crankdown
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nosetests test
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```
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Installing the Python package and running the PostgreSQL tests:
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```
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sudo pip install python/crankdown --upgrade
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cd pg
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sudo make install
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PGUSER=postgres make installcheck
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```
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