remove duplicated authors

NAMESPACE

@@ -47,6 +47,7 @@ S3method(format,rd_section_usage)
 S3method(format,rd_section_value)
 S3method(format,roxy_tag)
 S3method(merge,rd_section)
+S3method(merge,rd_section_author)
 S3method(merge,rd_section_inherit)
 S3method(merge,rd_section_inherit_dot_params)
 S3method(merge,rd_section_inherit_section)

NEWS.md

@@ -55,6 +55,8 @@
 
 * `@includeRmd` is now adapted to change in rmarkdown 2.12 regarding math support in `github_document()` (#1304).
 
+* Authors are now only counted only once if mentioned in merged documentations (@DanChaltiel #1333).
+
 # roxygen2 7.1.2
 
 * The new `@examplesIf` tag can be used to create conditional

R/rd-markdown.R

@@ -10,6 +10,13 @@ roxy_tag_rd.roxy_tag_author <- function(x, base_path, env) {
 format.rd_section_author <- function(x, ...) {
   format_collapse(x, ...)
 }
+#' @export
+merge.rd_section_author <- function(x, y, ...) {
+  stopifnot(identical(class(x), class(y)))
+  # Remove duplicated authors, e.g. when using @rdname
+  rd_section(x$type, unique(c(x$value, y$value)))
+}
+
 
 #' @export
 roxy_tag_parse.roxy_tag_format <- function(x) tag_markdown(x)

tests/testthat/test-rd-markdown.R

@@ -13,6 +13,26 @@ test_that("generic keys produce expected output", {
   expect_equal(out$get_value("author"), "test")
 })
 
+
+test_that("author duplicated get removed", {
+  out <- roc_proc_text(rd_roclet(), "
+    #' @name a
+    #' @title a
+    #' @author A
+    NULL
+
+    #' @name b
+    #' @rdname a
+    #' @author A
+    NULL
+
+    #' @name c
+    #' @rdname a
+    #' @author B
+    NULL")[[1]]
+  expect_equal(out$get_value("author"), c("A", "B"))
+})
+
 test_that("@format overrides defaults", {
   out <- roc_proc_text(rd_roclet(), "
     #' Title