go-patchutils

Package patchutils provides tools to compute the diff between source and diff files.

Works with diff files in unified format.

Design

Interdiff mode

InterDiff computes the diff of a source file patched with oldDiff and the same source file patched with newDiff, without access to the source.

Example

oldDiff newDiff

oldDiff	newDiff
`@@ -1,10 +1,13 @@ 80 days around the world. -We’ll find a pot of gold +You’ll find a pot of gold just sitting where the rainbow’s ending. +Top Cat! The most effectual Top Cat! +Who’s intellectual close friends get to call, +providing it’s with dignity. +The indisputable leader of the gang. Time — we’ll fight against the time, and we’ll fly on the white wings of the wind. -80 days around the world, -no we won’t say a word before the ship is really back.`	`@@ -2,9 +2,13 @@ We’ll find a pot of gold just sitting where the rainbow’s ending. +There’s a voice that keeps on calling me. +Who’s intellectual close friends get to call, +providing it’s with dignity. +The indisputable leader of the gang. Time — we’ll fight against the time, and we’ll fly on the white wings of the wind. -80 days around the world, no we won’t say a word before the ship is really back.`
result
`@@ -1,8 +1,8 @@ 80 days around the world. +We’ll find a pot of gold -You’ll find a pot of gold just sitting where the rainbow’s ending. -Top Cat! The most effectual Top Cat! +There’s a voice that keeps on calling me. Who’s intellectual close friends get to call, providing it’s with dignity. The indisputable leader of the gang. Time — we’ll fight against the time, and we’ll fly on the white wings of the wind. +no we won’t say a word before the ship is really back.`

@@ -1,10 +1,13 @@
 80 days around the world.
-We’ll find a pot of gold
+You’ll find a pot of gold
 just sitting where the rainbow’s ending.
 
+Top Cat! The most effectual Top Cat!
+Who’s intellectual close friends get to call,
+providing it’s with dignity.
+The indisputable leader of the gang.

 Time — we’ll fight against the time,
 and we’ll fly on the white wings of the wind.
 
-80 days around the world,
-no we won’t say a word before
 the ship is really back.

@@ -2,9 +2,13 @@
 We’ll find a pot of gold
 just sitting where the rainbow’s ending.
 
+There’s a voice that keeps on calling me.
+Who’s intellectual close friends get to call,
+providing it’s with dignity.
+The indisputable leader of the gang.

 Time — we’ll fight against the time,
 and we’ll fly on the white wings of the wind.
 
-80 days around the world,
 no we won’t say a word before
 the ship is really back.

result

@@ -1,8 +1,8 @@
 80 days around the world.
+We’ll find a pot of gold
-You’ll find a pot of gold
 just sitting where the rainbow’s ending.
 
-Top Cat! The most effectual Top Cat!
+There’s a voice that keeps on calling me.
 Who’s intellectual close friends get to call,
 providing it’s with dignity.
 The indisputable leader of the gang.
 
 Time — we’ll fight against the time,
 and we’ll fly on the white wings of the wind.
 
+no we won’t say a word before
 the ship is really back.

Mixed mode

MixedMode computes the diff of an oldSource patched with oldDiff and newSource patched with newDiff.

Example

oldSource	newSource
`80 days around the world. You’ll find a pot of gold just sitting where the rainbow’s ending. Top Cat! The most effectual Top Cat! Who’s intellectual close friends get to call, providing it’s with dignity. The indisputable leader of the gang. Time — we’ll fight against the time, and we’ll fly on the white wings of the wind. the ship is really back.`	`80 days around the world. We’ll find a pot of gold just sitting where the rainbow’s ending. There’s a voice that keeps on calling me. Who’s intellectual close friends get to call, providing it’s with dignity. The indisputable leader of the gang. Time — we’ll fight against the time, and we’ll fly on the white wings of the wind. no we won’t say a word before the ship is really back.`
oldDiff	newDiff
`@@ -4,6 +4,7 @@ Top Cat! The most effectual Top Cat! Who’s intellectual close friends get to call, +Round, round, all around the world. providing it’s with dignity. The indisputable leader of the gang.`	`@@ -5,7 +5,6 @@ There’s a voice that keeps on calling me. Who’s intellectual close friends get to call, providing it’s with dignity. -The indisputable leader of the gang. Time — we’ll fight against the time, and we’ll fly on the white wings of the wind.`
oldSource + oldDiff	newSource + newDiff
`80 days around the world. You’ll find a pot of gold just sitting where the rainbow’s ending. Top Cat! The most effectual Top Cat! Who’s intellectual close friends get to call, Round, round, all around the world. providing it’s with dignity. The indisputable leader of the gang. Time — we’ll fight against the time, and we’ll fly on the white wings of the wind. the ship is really back.`	`80 days around the world. We’ll find a pot of gold just sitting where the rainbow’s ending. There’s a voice that keeps on calling me. Who’s intellectual close friends get to call, providing it’s with dignity. Time — we’ll fight against the time, and we’ll fly on the white wings of the wind. no we won’t say a word before the ship is really back.`
result
@@ -1,14 +1,13 @@ 80 days around the world. -You’ll find a pot of gold +We’ll find a pot of gold just sitting where the rainbow’s ending. -Top Cat! The most effectual Top Cat! +There’s a voice that keeps on calling me. Who’s intellectual close friends get to call, -Round, round, all around the world. providing it’s with dignity. -The indisputable leader of the gang. Time — we’ll fight against the time, and we’ll fly on the white wings of the wind. +no we won’t say a word before the ship is really back.

Installation

go get -u github.com/google/go-patchutils

Usage

API

Godoc is available.

CLI tool

Build CLI tool

cd cli
go build

Interdiff mode

./cli interdiff -olddiff=<path_to_old_diff> -newdiff=<path_to_new_diff>

Mixed mode

./cli mixed -oldsource=<path_to_old_source> -olddiff=<path_to_old_diff> 
-newsource=<path_to_new_source> -newdiff=<path_to_new_diff>

# Packages

# README