This module provides a small collection of functions for diffing text.
The Diff library consists of a single file (diff.lua), plus a test script (tests/basic.lua). Just put the file somewhere in your Lua path. Here is a list of recent releases:
You can also install it using LuaRocks with
luarocks install diff
luarocks --from=http://sputnik.freewisdom.org/rocks/earth install diff
A simple diff of two strings:
> require("diff") > for _, token in ipairs(diff.diff("This is a test", "This was a test!")) do >> print(token, token) >> end This same is out was in same a same same test out test! in same
That is, diff.diff(old, new) returns a table of pairs, each consisting of a string and it's status: "same" (the string is present in both), "in" (the string appeared in new, or "out" (the string was present in old but was removed).
Alternatively, you can just generate an HTML for this diff:
> = diff.diff("This is a test", "This was a test!"):to_html() This <del>is</del><ins>was</ins> a <del>test</del><ins>test!</ins>
Provides functions for diffing text. (c) 2007, 2008 Yuri Takhteyev (email@example.com) (c) 2007 Hisham Muhammad License: MIT/X, see http://sputnik.freewisdom.org/en/License
|diff()||Returns a diff of two strings as a list of pairs, where the first value represents a token and the second the token's status ("same", "in", "out").
|escape_html()||Escapes an HTML string.
|format_as_html()||Formats an inline diff as HTML, with|
|quick_LCS()||Derives the longest common subsequence of two strings.
|split()||Split a string into tokens.
Copyright (c) 2007, 2008 Yuri Takhteyev, Hisham Muhammad
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.