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r-lib / gert

Simple git client for R
https://docs.ropensci.org/gert/
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gert::git_diff != git diff #152

Open assignUser opened 3 years ago

assignUser commented 3 years ago

I was looking for git diff in gert two compare to refs . I found git_diff which can only display the changes in the passed ref, which is the most basic function of git diff.

Is there a way to compare two refs (e.g. two branches) with gert and find the changed files between them (git diff --name-only branch1 branch2)?

jeroen commented 3 years ago

git_diff() returns a data frame, with a column containing the file name for each change? For example:

git_diff('HEAD^')$new

Shows the files changed in your most recent commit.

assignUser commented 3 years ago

Right. But only files changed in this commit. (or current working dir vs. last commit)

Not the changed files between two commits as you would with git diff ref1 ref2 -- (--name-only just for better readability):

$> git diff --name-only main run-on-change --
API
NAMESPACE
R/core.R
R/source.R
R/utils.R
inst/script.R
man/add_lib_dirs.Rd     
man/benchmark_run_ref.Rd
tests/testthat/test-utils.R

I am looking for this behaviour because I want to run some tests/benchmarks on pull requests only if the relevant file has changed between the branches (e.g. main and devel), so it would not be enough to only check the files changed in the last/one specific commit.

For now I can use system but I would rather use your great package to do it within R 😃

edit: And thank you for your quick response!