NOTE missing dependency on R >= 4.1.0 when using pipe or function

shorthand in package code files.

git-svn-id: https://svn.r-project.org/R/trunk@87614 00db46b3-68df-0310-9c12-caf00c1e9a41

src/library/tools/R/check.R

@@ -1250,6 +1250,24 @@ add_dummies <- function(dir, Log)
               }
             }
         }
+
+        if(!is_base_pkg &&
+           !.package_metadata_has_depends_on_R_at_least(db, "4.1.0")) {
+            files <-
+                names(.package_code_using_R_4.1_syntax(dirname(dfile)))
+            if(length(files)) {
+                if(!any) noteLog(Log)
+                any <- TRUE
+                msg <- "Missing dependency on R >= 4.1.0 because package code uses the pipe |> or function shorthand \\(...) syntax added in R 4.1.0."
+                printLog(Log,
+                         paste(c(strwrap(msg, indent = 2L, exdent = 2L),
+                                 "  File(s) using such syntax:",
+                                 paste0("  ", .pretty_format(sort(files)))),
+                               collapse = "\n"),
+                         "\n")
+            }
+        }
+
         if (!any) resultLog(Log, "OK")
         ## return (<never used in caller>):
         db