petertrr / kotlin-multiplatform-diff

Multiplaform kotlin library for calculating text differences. Based on java-diff-utils, supports JVM, JS and native targets.

kotlin-multiplatform-diff

This is a port of java-diff-utils to kotlin with multiplatform support. All credit for the implementation goes to original authors.

Features

All features from version 4.10 of the original library are present, except for:

• Unified diff, which heavily uses file read/write and therefore needs a more complicated rewrite for kotlin-multiplatform
• diff-utils-jgit, which uses JVM-only jgit library

Please refer to the original guides for more information.

Supported platforms

Currently, artifacts for the following platforms are supported:

• JVM
• JS (both browser and Node.js)
• LinuxX64
• MingwX64
• MacosX64

kotlin-multiplatform-diff's Issues

Incorrect behavior of ChangeDelta

Let's consider the following code:

val expectedData = listOf("Some line ")
val actualData = listOf("Some line")
val st = diff(expectedData, actualData).formatToString()
println("Status: $st")

And the result will be:
Status: [ChangeDelta, position 0, lines: [Some line[ ]]], so we can see, that the white space is absent - everything is ok.

---

However, if we add white space to the actualData, instead of expected:

val expectedData = listOf("Some line")
val actualData = listOf("Some line ")
val st = diff(expectedData, actualData).formatToString()
println("Status: $st")

The result will be
Status: [ChangeDelta, position 0, lines: [Some line]]
By this output, it's unclear what's going on, and it seems, that all data Some line is absent, instead of white space.

Also, maybe it will be convenient, if ChangeDelta will additionally print in which input there is the difference

E.g.
[ChangeDelta, position 0, lines: [["Absent data in actual input: ", Some line[ ]].....]
[ChangeDelta, position 0, lines: [["Extra data in actual input", Some line<>]....]

Or in some other manner

The library was published in legacy mode

We see the following error in project https://github.com/saveourtool/sarif-utils

w: The dependency 'io.github.petertrr:kotlin-multiplatform-diff:0.4.0' was published in the legacy mode. Support for such dependencies will be removed in the future.
See https://kotl.in/0b5kn8 for details.

Looks like need to migrate to latest gradle kotlin plugin