diff piecrust/processing/requirejs.py @ 117:6827dcc9d3fb

Changes to the asset processing pipeline: * Add semi-functional RequireJS processor. * Processors now match on the relative path. * Support for processors that add more processors of their own. * A couple of related fixes.
author Ludovic Chabant <ludovic@chabant.com>
date Tue, 28 Oct 2014 08:20:38 -0700
parents
children e5f048799d61
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/piecrust/processing/requirejs.py	Tue Oct 28 08:20:38 2014 -0700
@@ -0,0 +1,83 @@
+import os
+import os.path
+import json
+import hashlib
+import logging
+import platform
+import subprocess
+from piecrust.processing.base import Processor, PRIORITY_FIRST
+from piecrust.processing.tree import FORCE_BUILD
+
+
+logger = logging.getLogger(__name__)
+
+
+class RequireJSProcessor(Processor):
+    PROCESSOR_NAME = 'requirejs'
+
+    def __init__(self):
+        super(RequireJSProcessor, self).__init__()
+        self.is_bypassing_structured_processing = True
+        self._conf = None
+
+    def initialize(self, app):
+        super(RequireJSProcessor, self).initialize(app)
+
+        self._conf = app.config.get('requirejs')
+        if self._conf is None:
+            return
+
+        if 'build_path' not in self._conf:
+            raise Exception("You need to specify `requirejs/build_path` "
+                            "for RequireJS.")
+        self._conf.setdefault('bin', 'r.js')
+        self._conf.setdefault('out_path', self._conf['build_path'])
+
+    def onPipelineStart(self, pipeline):
+        super(RequireJSProcessor, self).onPipelineStart(pipeline)
+
+        logger.debug("Adding Javascript suppressor to build pipeline.")
+        skip = _JavascriptSkipProcessor(self._conf['build_path'])
+        pipeline.processors.append(skip)
+
+    def matches(self, path):
+        return path == self._conf['build_path']
+
+    def getDependencies(self, path):
+        return FORCE_BUILD
+
+    def process(self, path, out_dir):
+        args = [self._conf['bin'], '-o', path]
+        shell = (platform.system() == 'Windows')
+        cwd = self.app.root_dir
+        logger.debug("Running RequireJS: %s" % ' '.join(args))
+        try:
+            retcode = subprocess.call(args, shell=shell, cwd=cwd)
+        except FileNotFoundError as ex:
+            logger.error("Tried running RequireJS processor "
+                         "with command: %s" % args)
+            raise Exception("Error running RequireJS. "
+                            "Did you install it?") from ex
+        if retcode != 0:
+            raise Exception("Error occured in RequireJS compiler. "
+                            "Please check log messages above for "
+                            "more information.")
+        return True
+
+
+class _JavascriptSkipProcessor(Processor):
+    PROCESSOR_NAME = 'requirejs_javascript_skip'
+
+    def __init__(self, except_path=None):
+        super(_JavascriptSkipProcessor, self).__init__()
+        self.priority = PRIORITY_FIRST
+        self.is_bypassing_structured_processing = True
+        self._except_path = except_path
+
+    def matches(self, path):
+        _, ext = os.path.splitext(path)
+        return ext == '.js' and path != self._except_path
+
+    def process(self, in_path, out_path):
+        return False
+