add a generator for generic comic reader backends

this is an ugly solution; backends should be simple enough to not need a
generator, and this is almost achieved with genericcomicreader except
for the necessity of two separate short files (__init__ and test)

tools/gen_comic_reader.sh

@@ -0,0 +1,84 @@
+#!/bin/bash
+set -e
+
+case $1 in
+-h|--help)
+	echo "$0 [test] <backend name>"
+	;;
+test|tests)
+	TEST_ONLY=1
+	NAME=$2
+	DOWNLOAD_ID=$3
+	;;
+*)
+	NAME=$1
+	;;
+esac
+
+USERNAME="$(git config --get user.name)"
+Backend=$(echo $NAME|(head -c 1|tr a-z A-Z; cat))
+backend=$(echo $NAME|(head -c 1|tr A-Z a-z; cat))
+BACKEND_CLASS=$Backend"Backend"
+BACKEND_DIR=$(dirname $0)/../weboob/backends/$backend
+
+HEADER="\
+# -*- coding: utf-8 -*-
+
+# Copyright(C) $(date +%Y) $USERNAME
+#
+# This file is part of weboob.
+#
+# weboob is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# weboob is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with weboob. If not, see <http://www.gnu.org/licenses/>.
+"
+
+if [ -z $TEST_ONLY ]
+then
+	mkdir $BACKEND_DIR
+	
+	echo >$BACKEND_DIR/__init__.py "$HEADER
+
+from .backend import $BACKEND_CLASS
+
+__all__ = ['$BACKEND_CLASS']
+"
+
+	echo >$BACKEND_DIR/backend.py "$HEADER
+
+from weboob.tools.capabilities.gallery.genericcomicreader import GenericComicReaderBackend, DisplayPage
+
+__all__ = ['$BACKEND_CLASS']
+
+class $BACKEND_CLASS(GenericComicReaderBackend):
+    NAME = '$backend'
+    DESCRIPTION = '$Backend manga reading site'
+    DOMAIN = 'www.$backend.com'
+    BROWSER_PARAMS = dict(
+        img_src_xpath=\"//img[@id='comic_page']/@src\",
+        page_list_xpath=\"(//select[@id='page_select'])[1]/option/@value\")
+    ID_REGEXP = r'[^/]+/[^/]+'
+    URL_REGEXP = r'.+$backend.com/(%s).+' % ID_REGEXP
+    ID_TO_URL = 'http://www.$backend.com/%s'
+    PAGES = { URL_REGEXP: DisplayPage }
+"
+fi
+
+echo >$BACKEND_DIR/test.py "$HEADER
+from weboob.tools.capabilities.gallery.genericcomicreader import GenericComicReaderTest
+
+class $Backend""Test(GenericComicReaderTest):
+    BACKEND = '$backend'
+    DOWNLOAD_ID = '$DOWNLOAD_ID'
+"
+
+echo Now please edit files in $BACKEND_DIR