// getDiffChanges takes two revisions from which to generate a "git diff", and returns a
// slice of "changes" objects that represent that diff as parsed by Phabricator.
func (arc Arcanist) getDiffChanges(repo repository.Repo, from, to string) ([]interface{}, error) {
// TODO(ojarjur): This is a big hack, but so far there does not seem to be a better solution:
// We need to pass a list of "changes" JSON objects that contain the parsed diff contents.
// The simplest way to do that parsing seems to be to create a rawDiff and have Phabricator
// parse it on the server side. We then read back that diff, and return the changes from it.
rawDiff, err := repo.Diff(from, to, "-M", "--no-ext-diff", "--no-textconv",
"--src-prefix=a/", "--dst-prefix=b/",
fmt.Sprintf("-U%d", 0x7fff), "--no-color")
if err != nil {
return nil, err
}
createRequest := differentialCreateRawDiffRequest{Diff: rawDiff}
var createResponse differentialCreateRawDiffResponse
runArcCommandOrDie("differential.createrawdiff", createRequest, &createResponse)
if createResponse.Error != "" {
return nil, fmt.Errorf(createResponse.ErrorMessage)
}
diffID := createResponse.Response.ID
diff, err := readDiff(diffID)
if err != nil {
return nil, err
}
if diff != nil {
return diff.Changes, nil
}
return nil, fmt.Errorf("Failed to retrieve the raw diff for %s..%s", from, to)
}