Merge pull request #6658 from Carreau/less-175

pin less to less than 1.7.5

IPython/html/fabfile.py

@@ -1,85 +1,85 b''
 """ fabfile to prepare the notebook """
 
 from fabric.api import local,lcd
 from fabric.utils import abort
 import os
 from distutils.version import LooseVersion as V
 from subprocess import check_output
 
 pjoin = os.path.join
 static_dir = 'static'
 components_dir = pjoin(static_dir, 'components')
 here = os.path.dirname(__file__)
 
 min_less_version = '1.7.0'
-max_less_version = '1.8.0' # exclusive
+max_less_version = '1.7.5' # exclusive
 
 def _need_css_update():
     """Does less need to run?"""
     
     static_path = pjoin(here, static_dir)
     css_targets = [ 
         pjoin(static_path, 'style', '%s.min.css' % name)
         for name in ('style', 'ipython')
     ]
     css_maps = [t + '.map' for t in css_targets]
     targets = css_targets + css_maps
     if not all(os.path.exists(t) for t in targets):
         # some generated files don't exist
         return True
     earliest_target = sorted(os.stat(t).st_mtime for t in targets)[0]
     
     # check if any .less files are newer than the generated targets
     for (dirpath, dirnames, filenames) in os.walk(static_path):
         for f in filenames:
             if f.endswith('.less'):
                 path = pjoin(static_path, dirpath, f)
                 timestamp = os.stat(path).st_mtime
                 if timestamp > earliest_target:
                     return True
     
     return False
 
 def css(minify=False, verbose=False, force=False):
     """generate the css from less files"""
     minify = _to_bool(minify)
     verbose = _to_bool(verbose)
     force = _to_bool(force)
     # minify implies force because it's not the default behavior
     if not force and not minify and not _need_css_update():
         print("css up-to-date")
         return
     
     for name in ('style', 'ipython'):
         source = pjoin('style', "%s.less" % name)
         target = pjoin('style', "%s.min.css" % name)
         sourcemap = pjoin('style', "%s.min.css.map" % name)
         _compile_less(source, target, sourcemap, minify, verbose)
 
 def _to_bool(b):
     if not b in ['True', 'False', True, False]:
         abort('boolean expected, got: %s' % b)
     return (b in ['True', True])
 
 def _compile_less(source, target, sourcemap, minify=True, verbose=False):
     """Compile a less file by source and target relative to static_dir"""
     min_flag = '-x' if minify is True else ''
     ver_flag = '--verbose' if verbose is True else ''
     
     # pin less to version number from above
     try:
         out = check_output(['lessc', '--version'])
     except OSError as err:
         raise ValueError("Unable to find lessc.  Please install lessc >= %s and < %s " \
                          % (min_less_version, max_less_version))
     out = out.decode('utf8', 'replace')
     less_version = out.split()[1]
     if V(less_version) < V(min_less_version):
         raise ValueError("lessc too old: %s < %s. Use `$ npm install lesscss@X.Y.Z` to install a specific version of less" % (less_version, min_less_version))
     if V(less_version) >= V(max_less_version):
         raise ValueError("lessc too new: %s >= %s. Use `$ npm install lesscss@X.Y.Z` to install a specific version of less" % (less_version, max_less_version))
     
     static_path = pjoin(here, static_dir)
     with lcd(static_dir):
         local('lessc {min_flag} {ver_flag} --source-map={sourcemap} --source-map-basepath={static_path} --source-map-rootpath="../" {source} {target}'.format(**locals()))