initial commit

Author: froydnj

LICENSE

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+Copyright (c) 2004, Nathan Froyd.  All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+* Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+
+* Neither the name of Nathan Froyd nor the names of the contributors to
+this software may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
+OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

NEWS

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+-*- mode: outline -*-
+
+* Version 0.4, released 10-05-2005
+
+** bugfixes
+
+Context diff printing is "more correct".
+
+When printing unified diff windows, the header line ("@@ ... @@") is no
+longer printed twice.
+
+** changes
+
+DIFF now depends on CL-PPCRE.
+
+** new features
+
+A patch-reading interface has been added.  It currently supports unified
+and "new-style" context diffs.  Applying patches will be added in a
+future release.  See DIFF::READ-PATCHES-FROM-FILE for a preliminary
+interface to reading patches.
+
+* Version 0.3, released 02-01-2005
+
+** new features
+
+Supports generation of "context"-style diffs (diff -c).  As with
+unified-style diffs, the diffs may not exactly match the diffs generated
+by GNU diff, but GNU patch (or similar) should be able to use the diffs.
+
+The internal interface has been reorganized somewhat.  There is now a
+DIFF class and PRINT-OBJECT is used in preference to specially-written
+PRINT-FOO functions.
+
+An interface is actually exported from package DIFF.  GENERATE-DIFF
+seems to be a reasonable interface for making diffs of all kinds;
+suggestions for a better interface are always appreciated (in
+particular, there should be an interface for diffing arbitrary streams).
+
+** incompatible changes
+
+DIFF::*UNIFIED-DIFF-CONTEXT-LINES* has been renamed to
+DIFF::*DIFF-CONTEXT-LINES*, as it can be used for both unified and
+context diffs.
+
+DIFF::PRINT-DIFF has been removed in favor of PRINT-OBJECT functionality.
+
+* Version 0.2, released 27-05-2004
+
+** new features
+
+An ASDF packaging file has been added.
+
+This package creates and uses the DIFF package.
+
+An implementation of the vdelta binary differencing algorithm has been
+added.
+
+Unified diff generation now produces Lisp objects to sling around rather
+than writing the diff to a stream as it is being generated (change made
+as per #lisp suggestions).
+
+** tests
+
+A small set of test files have been included with the distribution.
+
+* Version 0.1, released 24-05-2004
+
+Initial release

README

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+DIFF is a package for computing various forms of differences between
+blobs of data and then doing neat things with those differences.
+Currently diff knows how to compute three common forms of differences:
+
+* "unified" format diffs, suitable for inspecting changes between
+  different versions of files;
+* "context" format diffs, suitable for inspecting changes between
+  different versions of files;
+* "vdelta" format binary diffs, which might be useful in a version
+  control system for compact storage of deltas.
+
+An ASDF system is provided; there are no symbols exported from the DIFF
+package, as a good interface has not yet been decided upon.
+Documentation is fairly sparse.
+
+Nathan Froyd <[email protected]>

TODO

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+* implement patch(1) functionality
+* more options for context/unified diff output; in particular, supporting
+  something similar to GNU diff's -F option would be useful.
+* vcdiff encoding of copy/insert deltas
+* structural differencing algorithms
+* diff3 functionality
+* applying svndiffs to files/streams
+* identifying a useful interface for CL:EXPORT
+* docstrings and such

diff.asd

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+;;;; diff.asd - the ASDF system definition for diff -*- lisp -*-
+(defpackage #:diff-system
+  (:use :cl :asdf))
+
+(in-package #:diff-system)
+
+(defsystem :diff
+  :version "0.4"
+  :depends-on (cl-ppcre)
+  :components ((:file "package")
+               (:file "diff" :depends-on ("package"))
+               (:file "patch" :depends-on ("diff"))
+               (:file "vdelta" :depends-on ("package"))
+               (:file "svndiff" :depends-on ("package"))
+               (:static-file "README")
+               (:static-file "TODO")
+               (:static-file "NEWS")
+               (:static-file "LICENSE")))