diffr2 for nice diffs

R package for creating code differences with JavaScript based on:

diff2html and jsdiff. This package is not related with the CRAN package diffr (the sole reminiscence is the name).

With create_diff() it is possible to create diffs from characters or text files (either both inputs are text files or they are text files) and compare them interactively in the form of an htmlwidget. If the latter is chosen, other local diffs, e.g. from Git repositories can be used. For instance with gert see the example below. diffr2 can use various options to change the appearance of the diff, e.g. display both inputs side by side. Similarly it is possible to create diffs with libxdiffR

If necessary, diffr2 can be used in combination with shiny. An example file is included.

Installation

Either with remotes::install_github("JanMarvin/diffr2") or via r-universe:

# Enable repository from janmarvin
options(repos = c(
  janmarvin = 'https://janmarvin.r-universe.dev',
  CRAN = 'https://cloud.r-project.org'))
# Download and install diffr2 in R
install.packages('diffr2')

Code example

library(diffr2)

a <- '<a><b foo="bar"/></a>'
b <- '<a><b foo="bar">baz</b></a>'

# side by side comparisson
diffr2(a, b)

# raw diff
message(create_diff(a, b))

# git diff in side by side format
git_head <- paste(gert::git_diff_patch(ref = "HEAD^", repo = "."), collapse = "\n")
diffr2(diff = git_head, outputFormat = "side-by-side")

# read github commit as diff
tmp <- tempfile(fileext = ".diff")
download.file(url = "https://github.com/JanMarvin/diffr2/commit/deff0afe7a2cbaabd42d93fd13a4f8dd0dfabb03.diff", tmp)
diffr2(tmp)

Screenshot from the included shiny example

License

This package is licensed under the MIT license.