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Diffstat (limited to 'extensions/jffs2.write')
-rw-r--r-- | extensions/jffs2.write | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/extensions/jffs2.write b/extensions/jffs2.write new file mode 100644 index 00000000..46b69a53 --- /dev/null +++ b/extensions/jffs2.write @@ -0,0 +1,64 @@ +#!/usr/bin/python +#-*- coding: utf-8 -*- +# Copyright © 2015 Codethink Limited + +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; version 2 of the License. +# +# This program 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 General Public License for more details. +# +# You should have received a copy of the GNU General Public License along +# with this program. If not, see <http://www.gnu.org/licenses/>. + + +'''A Morph deployment write extension for creating images with jffs2 + as the root filesystem.''' + + +import cliapp +import os + +import morphlib.writeexts + + +class Jffs2WriteExtension(morphlib.writeexts.WriteExtension): + + '''See jffs2.write.help for documentation.''' + + def process_args(self, args): + if len(args) != 2: + raise cliapp.AppException('Wrong number of command line args') + + temp_root, location = args + + try: + self.create_jffs2_system(temp_root, location) + self.status(msg='Disk image has been created at %(location)s', + location = location) + except Exception: + self.status(msg='Failure to deploy system to %(location)s', + location = location) + raise + + def create_jffs2_system(self, temp_root, location): + erase_block = self.get_erase_block_size() + cliapp.runcmd( + ['mkfs.jffs2', '--pad', '--no-cleanmarkers', + '--eraseblock='+erase_block, '-d', temp_root, '-o', location]) + + def get_erase_block_size(self): + erase_block = os.environ.get('ERASE_BLOCK', '') + + if erase_block == '': + raise cliapp.AppException('ERASE_BLOCK was not given') + + if not erase_block.isdigit(): + raise cliapp.AppException('ERASE_BLOCK must be a whole number') + + return erase_block + +Jffs2WriteExtension().run() |