Wednesday Dec 11, 2013

New cmake options for JSON UDFs.

Two weeks ago I announced new maintenance release of JSON UDFs: 0.2.1. It not only contains bug fixes, how you can expect from a maintenance release, but also contains improvements in build and test scripts.

First improvement is the easier way to build JSON UDFs on Windows. In the first version building on Windows was a pane: you had to build PCRE library, copy four files to directories where Visual Studio can find them and only then build JSON functions themselves. Now you can build this way too, but only if you really wish.

By default cmake will create appropriate makefiles for bundled PCRE sources and for JSON functions. Only command you need to prepare sources is:

"C:\Program Files (x86)\CMake 2.8\bin\cmake.exe" -G "Visual Studio 11 Win64" . -DMYSQL_DIR="/path/to/mysql/installation"   

And then you can build functions:

devenv my_json_udf.sln /build Release

This is done by introducing new cmake option WITH_PCRE which can take two parameters: system and bundled. For Windows default is bundled which means bundled version of PCRE will be used. Default parameter for UNIX is system, because you usually have regular expression library installed and no need to build it statically into JSON functions. But you can overwrite defaults on both systems, specifying option -DWITH_PCRE=system|bundled for the cmake command.

Another improvement is test automation. In the first available version you had to use strange file Makefile.unix and weird instructions to run tests. In 0.2.1 this file is not needed anymore: simply run `make test` on UNIX or open solution my_json_udf.sln in Visual Studio and execute target ALL_TESTS. Here I have a question for mature Windows users: do you know how to run this on command line? But regardless to command line or not this also means you don't need Cygwin to run tests on Windows. Perl, however, is still required and must be in the path, because it is required by the MySQL Test Framework.

Of course, MySQL server directory should contain binaries. In other words: if you use source dir when build JSON functions you need to compile MySQL server to be able to run tests.

On Linux, as well on other OSes which can run Valgrind, you can run tests with valgrind too. Instructions are a bit weird: you need to specify option -DVALGRIND=1 when build functions to run tests under valgrind. Command, which you need to use to run tests under valgrind is still the same: make test

And, finally, last improvement is possibility to create a source package by running command make build_source_dist. This option can look not very useful from the user point of view, but it really helps producing packages for MySQL Labs out of internal repository with sources. If you run make build_source_dist file, named mysql-json-udfs-0.2.1-labs-json-udfs-src.tar.gz, which contains all source code, will be produced. On Windows, again, you need to open my_json_udf.sln solution and build this target.

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Working blog of Sveta Smirnova - MySQL Senior Principal Support Engineer working in Bugs Analysis Support Group

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