front-end: Introduce 'front-end' directory with source files for building the front-end

The top level with package.json is not included when installing with pip, and
'kallithea-cli front-end-build' and npm would thus fail.

Instead, introduce 'kallithea/front-end/'. It is under 'kallithea/' and is thus
included when doing pip install, but it is just a source directory and not
under "public". Most of the "less" stuff should probably move there. And
probably also most things that now are checked in under "public", so a fully
populated public front-end directory can be built anywhere, without write
access to the Python installation directory.

.hgignore

@@ -8,7 +8,6 b' syntax: glob'
 *.mo
 .eggs/
 tarballcache/
-node_modules/
 
 syntax: regexp
 ^rcextensions
@@ -22,6 +21,8 b' syntax: regexp'
 ^\.project$
 ^\.pydevproject$
 ^\.coverage$
+^kallithea/front-end/node_modules$
+^kallithea/front-end/package-lock\.json$
 ^kallithea/public/css/style\.css(\.map)?$
 ^kallithea/public/css/pygments.css$
 ^theme\.less$

MANIFEST.in

@@ -12,12 +12,12 b' include development.ini'
 include           pytest.ini
 include           requirements.txt
 include           tox.ini
-include           package.json
 recursive-include docs *
 recursive-include init.d *
 recursive-include kallithea/alembic *
 include           kallithea/bin/ldap_sync.conf
 include           kallithea/lib/paster_commands/template.ini.mako
+recursive-include kallithea/front-end *
 recursive-include kallithea/i18n *
 recursive-include kallithea/public *
 recursive-include kallithea/templates *

kallithea/bin/kallithea_cli_front_end.py

@@ -35,22 +35,24 b' def front_end_build(install_deps, genera'
     The installation of front-end dependencies happens via the tool 'npm' which
     is expected to be installed already.
     """
-    rootdir = os.path.dirname(os.path.dirname(os.path.abspath(kallithea.__file__)))
+    front_end_dir = os.path.abspath(os.path.join(kallithea.__file__, '..', 'front-end'))
+    public_dir = os.path.abspath(os.path.join(kallithea.__file__, '..', 'public'))
 
     if install_deps:
         click.echo("Running 'npm install' to install front-end dependencies from package.json")
-        subprocess.check_call(['npm', 'install'], cwd=rootdir)
+        subprocess.check_call(['npm', 'install'], cwd=front_end_dir)
 
     if generate:
         click.echo("Generating CSS")
-        with open(os.path.join(rootdir, 'kallithea', 'public', 'css', 'pygments.css'), 'w') as f:
+        with open(os.path.join(public_dir, 'pygments.css'), 'w') as f:
             subprocess.check_call(['pygmentize',
                     '-S', 'default',
                     '-f', 'html',
                     '-a', '.code-highlight'],
                     stdout=f)
-        lesscpath = os.path.join(rootdir, 'node_modules', '.bin', 'lessc')
-        lesspath = os.path.join(rootdir, 'kallithea', 'public', 'less', 'main.less')
-        csspath = os.path.join(rootdir, 'kallithea', 'public', 'css', 'style.css')
+        lesscpath = os.path.join(front_end_dir, 'node_modules', '.bin', 'lessc')
+        lesspath = os.path.join(public_dir, 'less', 'main.less')
+        csspath = os.path.join(public_dir, 'css', 'style.css')
         subprocess.check_call([lesscpath, '--relative-urls', '--source-map',
-                '--source-map-less-inline', lesspath, csspath])
+                '--source-map-less-inline', lesspath, csspath],
+                cwd=front_end_dir)