plovr is a build tool for projects that use Closure. (Its name is the
product of the animal on the cover of this book, the Web 2.0 zeitgeist, and
domain name availability.) It can be run either as a web server (like the
Closure Compiler Service introduced in Chapter 12), or as a command-line build script (like
calcdeps.py). The goal of plovr is to make development with
Closure easier and faster. By integrating the Closure Library, Templates,
and Compiler into a single application with a normalized set of input
options, it is considerably easier to get up and running with Closure from a
single download. Furthermore, because plovr can be run as a web server, it
can store information from previous compilations in memory, making
subsequent compilations faster.
When running plovr as a web server, it provides a number of services that can help with development:
Automatically compiles Soy files (as indicated by files whose
names end in
Provides a view that compares the size of the original code to that of the compiled code. This is done on a per-file basis so that it is possible to identify which input files are contributing the most code to the compiled output.
Generates an externs file from the calls to
in the input.