Julio Merino

Software artist. Writer aficionado. Open source enthusiast. Runner. Father of two.
Currently: Senior Software Engineer at Google, New York City.

  • Exposing a configuration tree through Lua

    In the previous post, I discussed the type-safe tree data structure that is now in the Kyua codebase, aimed at representing the configuration of the program. In this post, we'll see how this data structure ties to the parsing of the configuration file. One goal in the design of the configuration file was to make its contents a simple key/value association (i.e. assigning values to predetermined configuration variables). Of course, the fact that the configuration file is just a Lua script means that additional constructions (conditionals, functions, etc.

    June 2, 2012 · Continue reading (about 3 minutes) · Comments

  • Type-safe, dynamic tree data type

    The core component of the new configuration library in Kyua is the utils::config::tree class: a type-safe, dynamic tree data type. This class provides a mapping of string keys to arbitrary types: all the nodes of the tree have a textual name, and they can either be inner nodes (no value attached to them), or leaf nodes (an arbitrary type attached as a value to them). The keys represent traversals through such tree, and do this by separating the node names with dots (things of the form root.

    May 29, 2012 · Continue reading (about 5 minutes) · Comments

  • Rethinking Kyua's configuration system

    In the previous blog post, I described the problems that the implementation of the Kyua configuration file parsing and in-memory representation posed. I also hinted that some new code was coming and, after weeks of work, I'm happy to say that it has just landed in the tree! I really want to get to explaining the nitty-gritty details of the implementation, but I'll keep these for later. Let's focus first on what the goals for the new configuration module were, as these drove a lot of the implementation details:Key/value pairs representation: The previous configuration system did this already, and it is a pretty good form for a configuration file because it is a simple, understandable and widespread format.

    May 28, 2012 · Continue reading (about 4 minutes) · Comments

  • Kyua's configuration system showing its age

    A couple of years ago, when Kyua was still a newborn, I wrote a very ad-hoc solution for the parsing and representation of its configuration files. The requirements for the configuration were minimal, as there were very few parameters to be exposed to the user. The implementation was quick and simple to allow further progress on other more-important parts of the project. (Yep, quick is an euphemism for dirty: the implementation of the "

    May 26, 2012 · Continue reading (about 3 minutes) · Comments

  • Kyua gets nicer console messages

    For the last couple of weeks, particularly during a bunch of long flights, I have been improving the command-line user interface of Kyua by implementing controlled line wrappings on screen boundaries: messages that are too long to fit on the screen are preprocessed and split into multiple lines at word boundaries. This affects informational messages, error messages and, specially, the output of the built-in help command. I originally got this idea from Monotone and later implemented it into ATF but, when writing Kyua's code, I decided to postpone its implementation until a later stage.

    April 2, 2012 · Continue reading (about 4 minutes) · Comments

  • Kyua generates its first public HTML report

    Lately, three long trips (5 hours in a bus, and 6 and 10 hours in two planes) have allowed me to work on the long-promised HTML reporting feature of Kyua. The result of these three trips is, effectively, the ability to generate HTML reports for specific test actions! The current results are extremely rudimentary (they lack tons of would-be-useful information) and not that aesthetically pleasing. However, the database already records enough information to make these reports more useful and pretty, so "

    March 13, 2012 · Continue reading (about 2 minutes) · Comments

  • Projects migrated to Git

    I finally took the plunge. Yesterday night, I migrated the Kyua and Lutok repositories from Subversion to Git. And this morning I migrated ATF from Monotone and custom hosting to Git and Google Code; oh, and this took way longer than expected. Migration of Kyua and Lutok Migrating these two projects was straightforward. After preparing a fresh local Git repository following the instructions posted yesterday, pushing to Google Code is a simple matter:

    February 26, 2012 · Continue reading (about 3 minutes) · Comments

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