circle: manually watch directories for less files

circle/watch.py

+import subprocess
+import os
+import pyinotify
+from django.conf import settings
+
+STATIC_FILES = u'--include-path={}'.format(':'.join(settings.STATICFILES_DIRS))
+
+
+class LessUtils(object):
+    @staticmethod
+    def less_path_to_css_path(pathname):
+        return "%s.css" % pathname[:-1 * len(".less")]
+
+    @staticmethod
+    def compile_less(less_pathname, css_pathname):
+        cmd = ["lessc", STATIC_FILES, less_pathname, css_pathname]
+
+        print("\n%s" % ("=" * 30))
+        print("Compiling: %s" % os.path.basename(less_pathname))
+
+        try:
+            subprocess.check_output(cmd)
+        except subprocess.CalledProcessError as e:
+            print(e.output)
+        else:
+            print("Successfully compiled:\n%s\n->\n%s" % (
+                less_pathname, css_pathname))
+
+
+# for first run compile everything
+print("Initial LESS compiles")
+current_dir = os.path.dirname(os.path.realpath(__file__))
+
+for root, dirs, files in os.walk("/home/cloud/circle/circle"):
+    for f in files:
+        if not f.endswith(".less"):
+            continue
+
+        relpath = os.path.relpath(root, current_dir)
+        if relpath.startswith(("static_collected", "bower_components")):
+            continue
+
+        less_pathname = "%s/%s" % (root, f)
+        css_pathname = LessUtils.less_path_to_css_path(less_pathname)
+        LessUtils.compile_less(less_pathname, css_pathname)
+
+print("\n%s\n" % ("=" * 30))
+print("End of initial LESS compiles\n")
+
+
+# after first run watch less files
+wm = pyinotify.WatchManager()
+
+
+class EventHandler(pyinotify.ProcessEvent):
+    def process_IN_MODIFY(self, event):
+        if not event.name.endswith(".less"):
+            return
+
+        css_pathname = LessUtils.less_path_to_css_path(event.pathname)
+        LessUtils.compile_less(event.pathname, css_pathname)
+
+
+handler = EventHandler()
+notifier = pyinotify.Notifier(wm, handler)
+wm.add_watch(current_dir, pyinotify.IN_MODIFY, rec=True)
+notifier.loop()

requirements/base.txt

@@ -36,3 +36,4 @@ pika==0.9.13
 Fabric==1.9.0
 lxml==3.3.5
 django-pipeline==1.3.25
+pyinotify==0.9.4