yangdiff-pro

Organization:

YumaWorks, Inc.

Module:

yangdiff-pro

Version:

2011-10-06

File:

yangdiff-pro.yang

Abstract:

yangdiff-pro compares the semantics and syntax between two revisions of the same YANG module. The conceptual data model is comp...

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Description:

yangdiff-pro compares the semantics and syntax between
two revisions of the same YANG module. The
conceptual data model is compared, not the
individual files.

For example, unless statement order is significant,
changing the order is not considered a change, and
is not reported. Reformatted test (whitespace changes)
are also not reported.

If a data type definition is changed in form,
but not content, then a 'modify type' message
will be generated, but no additional sub-fields
will be reported.

INPUT FILES

To compare one module, use the 'old' and 'new'
parameters to specify YANG module files,
each with a filespec string ending with the '.yang'
file extension. The filespecs must represent
different files. If the 'old' parameter represents
a directory, then this directory will be searched
for the 'new' filename.

To compare all the modules in a subtree, use the
'old' and 'new' parameters to specify a directory
to be searched for YANG modules to be processed.
In this mode, each new module is compared to
a corresponding file within the 'old' subtree.
Also, dependency and include files
will be kept separate, for each subtree.

Unless the 'help' or 'version' parameters is entered,
the 'old' and 'new' parameters must be present.

SEARCH PATH

When a module name is entered as input, or when a
module or submodule name is specified in an import or include
statement within the file, the following search algorithm
is used to find the file:

1) if the parameter for the file that generated the
search request represents a subtree, search that
subtree first.
2) file is in the current directory
3) YANG_MODPATH environment var (or set by modpath parameter)
4) $HOME/modules directory
5) $YANG_HOME/modules directory
6) $YANG_INSTALL/modules directory OR
default install module location, '/usr/share/yang/modules'

By default, the entire directory tree for all locations
(except step 1) will be searched, not just the specified
directory. The 'subdirs' parameter can be used to
prevent sub-directories from being searched.

Any directory name beginning with a dot character '.'
will be skipped. Also, any directory named 'CVS' will
be skipped in directory searches.

OUTPUT MODES

By default, any comparison output will be sent to STDOUT.

The 'output' parameter can be used to specify the
full filespec of the output file, or a
complete directory specification to be combined
with the default filename (yangdiff-pro.log).

ERROR LOGGING

By default, warnings and errors are sent to STDOUT.

A log file can be specified instead with the 'log' parameter.
Existing log files can be reused with the 'logappend'
parameter, otherwise log files are overwritten.

The logging level can be controlled with the 'log-level'
parameter. The default log level is 'info'. The
log-levels are additive:

off: suppress all errors (not recommended!)
A program return code of '1' indicates some error.
error: print errors
warn: print warnings
info: print generally interesting trace info
debug: print general debugging trace info
debug2: print verbose debugging trace info

Copyright (c) 2008 - 2011 YumaWorks, Inc. All rights reserved.

Redistribution and use in source and binary forms, with or
without modification, is permitted pursuant to, and subject
to the license terms contained in, the BSD 3-Clause License
http://opensource.org/licenses/BSD-3-Clause