I've been working on a little script to assist with compiling CoffeeScript
for my project. I have it partially working, but am seeking some help on
making it completely correct.
Here's the main code:
coffeescript.gradle:
import ro.isdc.wro.model.resource.*
import ro.isdc.wro.extensions.processor.js.*
buildscript {
repositories { mavenCentral() }
dependencies {
classpath "ro.isdc.wro4j:wro4j-extensions:${versions.wro4j}"
}
}
class CompileCoffeeScript extends DefaultTask {
def srcDir = "src/main/coffeescript"
def outputDir = "${project.buildDir}/compiled-coffeescript"
@InputDirectory
File getSrcDir() { project.file(srcDir) }
@OutputDirectory
File getOutputDir() { project.file(outputDir) }
@TaskAction
void doCompile() {
logger.info "Compiling CoffeeScript sources from $srcDir into
$outputDir"
def tree = project.fileTree srcDir, {
include '**/*.coffee'
}
tree.visit { visit ->
if (visit.directory) return
def inputFile = visit.file
def inputPath = visit.path
def outputPath = inputPath.replaceAll(/\.coffee$/, '.js')
def outputFile = new File(outputDir, outputPath)
logger.info "Compiling ${inputPath}"
outputFile.parentFile.mkdirs()
def resource = Resource.create(inputFile.absolutePath,
ResourceType.JS)
new CoffeeScriptProcessor().process(resource, inputFile.newReader(),
outputFile.newWriter())
}
}
}
project.ext.CompileCoffeeScript = CompileCoffeeScript
And here's what I've added to my main build script:
apply from: "coffeescript.gradle"
task compileCoffeeScript(type: CompileCoffeeScript)
processResources {
from compileCoffeeScript
}
This works partially: when I change a source .coffee file, or add a new
.coffee file, then all of the .coffee files are recompiled to JavaScript
and included in the output JAR file (that is, task jar depends on task
processResources which now depends on task compileCoffeeScript).
However, if I delete an input file, I'm only getting partial behavior:
:tapestry-core:compileCoffeeScript
Executing task ':tapestry-core:compileCoffeeScript' due to:
Input file
/Users/hlship/workspaces/tapestry/tapestry5/tapestry-core/src/main/coffeescript/proto/bye.coffee
for task ':tapestry-core:compileCoffeeScript' removed.
Compiling CoffeeScript sources from src/main/coffeescript into
/Users/hlship/workspaces/tapestry/tapestry5/tapestry-core/build/compiled-coffeescript
Compiling proto/hello.coffee
:tapestry-core:processResources
... but I see the output .js file for the deleted input .coffee file still
in the JAR (and in build/compiled-coffeescript). In other words, deleting a
source file does not cause the previously generated output file to be
deleted.
Secondly, and perhaps this is related, when I change ANY .coffee file, then
ALL .coffee files are recompiled. CoffeeScript is unlike Java, each file
is pretty much independent of all others (it's all going to be very late
bound inside the client browser).
So ... should I simply delete the output directory inside my doCompile()
method? Given the message in the console output above, it seems like there
could be a notification to a task that an input file was deleted and it
should ensure the corresponding output file(s) are deleted.
But if I want a more "incremental" style, am I expected to walk the output
directory and delete anything that doesn't have a corresponding source file?
And, is there a base class to extend from that handles more of this for me?
SourceTask doesn't seem to do quite what I want.
Thanks in advance for any guidance.
$ gradle --version
------------------------------------------------------------
Gradle 1.0
------------------------------------------------------------
Gradle build time: Tuesday, June 12, 2012 12:56:21 AM UTC
Groovy: 1.8.6
Ant: Apache Ant(TM) version 1.8.2 compiled on December 20 2010
Ivy: 2.2.0
JVM: 1.7.0_04 (Oracle Corporation 23.0-b21)
OS: Mac OS X 10.7.4 x86_64
--
Howard M. Lewis Ship
Creator of Apache Tapestry
The source for Tapestry training, mentoring and support. Contact me to
learn how I can get you up and productive in Tapestry fast!
(971) 678-5210
http://howardlewisship.com
