global-var support for less

Author: Anber

static_precompiler/compilers/less.py

@@ -1,10 +1,11 @@
 from static_precompiler.exceptions import StaticCompilationError
 from static_precompiler.compilers.base import BaseCompiler
-from static_precompiler.settings import LESS_EXECUTABLE
+from static_precompiler.settings import LESS_EXECUTABLE, LESS_GLOBAL_VARS
 from static_precompiler.utils import run_command, convert_urls
 import os
 import posixpath
 import re
+import hashlib
 
 
 class LESS(BaseCompiler):
@@ -16,6 +17,22 @@ class LESS(BaseCompiler):
 
  IMPORT_RE = re.compile(r"@import\s+(.+?)\s*;", re.DOTALL)
  IMPORT_ITEM_RE = re.compile(r"([\"'])(.+?)\1")
+ VARIABLE_RE = re.compile(r".*@\{(.+?)\}.*")
+
+ def get_output_filename(self, source_filename):
+ """ Return the name of compiled file based on the name of source file.
+
+ :param source_filename: name of a source file
+ :type source_filename: str
+ :returns: str
+
+ """
+ vars_hash = ""
+ if len(LESS_GLOBAL_VARS):
+ vars_str = ";".join([k + "=" + v for (k, v) in LESS_GLOBAL_VARS])
+ vars_hash = hashlib.md5(vars_str).hexdigest() + "."
+ 
+ return source_filename[:-len(self.input_extension)] + vars_hash + self.output_extension
 
  def should_compile(self, source_path, from_management=False):
  # Do not compile the files that start with "_" if run from management
@@ -27,8 +44,10 @@ def compile_file(self, source_path):
  full_source_path = self.get_full_source_path(source_path)
  args = [
  LESS_EXECUTABLE,
- full_source_path,
  ]
+ for var in LESS_GLOBAL_VARS:
+ args.append("--global-var=%s=%s" % var)
+ args.append(full_source_path)
  # `cwd` is a directory containing `source_path`. Ex: source_path = '1/2/3', full_source_path = '/abc/1/2/3' -> cwd = '/abc'
  cwd = os.path.normpath(os.path.join(full_source_path, *([".."] * len(source_path.split("/")))))
  out, errors = run_command(args, None, cwd=cwd)
@@ -64,6 +83,10 @@ def find_imports(self, source):
  imports = set()
  for import_string in self.IMPORT_RE.findall(source):
  import_string = import_string.strip()
+ match = self.VARIABLE_RE.match(import_string)
+ # TODO: variable in @import
+ if match:
+ continue
  if import_string.startswith("(css)"):
  continue
  if "url(" in import_string:

static_precompiler/settings.py

@@ -46,6 +46,8 @@
 SCSS_USE_COMPASS = getattr(settings, "SCSS_USE_COMPASS", False)
 LESS_EXECUTABLE = getattr(settings, "LESS_EXECUTABLE", "lessc")
 
+LESS_GLOBAL_VARS = getattr(settings, "LESS_GLOBAL_VARS", [])
+
 PREPEND_STATIC_URL = getattr(settings, 'STATIC_PRECOMPILER_PREPEND_STATIC_URL', False)
 
 DISABLE_AUTO_COMPILE = getattr(settings, 'STATIC_PRECOMPILER_DISABLE_AUTO_COMPILE', False)