front-end: Store temporary files in a tmp directory

Avoid mixing temporary files with source files or have them in the generated
output. But for now, keep them in the front-end directory where we need write
access for node_modules anyway.

.hgignore

@@ -23,8 +23,8 b' syntax: regexp'
 ^\.coverage$
 ^kallithea/front-end/node_modules$
 ^kallithea/front-end/package-lock\.json$
+^kallithea/front-end/tmp$
 ^kallithea/public/css/style\.css(\.map)?$
-^kallithea/public/css/pygments.css$
 ^theme\.less$
 ^kallithea\.db$
 ^test\.db$

kallithea/bin/kallithea_cli_front_end.py

@@ -43,8 +43,12 b' def front_end_build(install_deps, genera'
         subprocess.check_call(['npm', 'install'], cwd=front_end_dir)
 
     if generate:
+        tmp_dir = os.path.join(front_end_dir, 'tmp')
+        if not os.path.isdir(tmp_dir):
+            os.mkdir(tmp_dir)
+
         click.echo("Generating CSS")
-        with open(os.path.join(public_dir, 'pygments.css'), 'w') as f:
+        with open(os.path.join(tmp_dir, 'pygments.css'), 'w') as f:
             subprocess.check_call(['pygmentize',
                     '-S', 'default',
                     '-f', 'html',

kallithea/public/less/main.less

@@ -13,7 +13,7 b''
 @import (inline) "3rd-party/dataTables.bootstrap.css";
 @import (less) "../js/select2/select2.css";
 @import (less) "../js/select2/select2-bootstrap.css";
-@import (less) "../css/pygments.css";
+@import (less) "tmp/pygments.css";
 @import (less) "../fontello/css/kallithea.css";
 
 /* kallithea styles */