Support clickable hyperlinks (#2646)

* lintr now imports cli

* Support clickable hyperlinks when they are available

* Rename variables + restyle

* Remove unneeded space

* refactor in `build_line_ref()`

* Support path with closing brackets

* Update NEWS.md

* Update NEWS.md

Co-authored-by: AshesITR <[email protected]>

* Update methods.R

---------

Co-authored-by: AshesITR <[email protected]>

Author: olivroy

NEWS.md

@@ -88,6 +88,7 @@
 ## Notes
 
 * All user-facing messages are now prepared using the `{cli}` package (#2418, @IndrajeetPatil). All messages have been reviewed and updated to be more informative and consistent.
+* File locations in lints and error messages contain clickable hyperlinks to improve code navigation (#2645, #2588, @olivroy).
 * {lintr} now depends on R version 4.0.0. It already does so implicitly due to recursive upstream dependencies requiring this version; we've simply made that dependency explicit and up-front (#2569, @MichaelChirico).
 
 # lintr 3.1.2

R/methods.R

@@ -1,27 +1,16 @@
 #' @export
 format.lint <- function(x, ..., width = getOption("lintr.format_width")) {
-  if (requireNamespace("cli", quietly = TRUE)) {
-    color <- switch(x$type,
-      warning = cli::col_magenta,
-      error = cli::col_red,
-      style = cli::col_blue,
-      cli::style_bold
-    )
-    emph <- cli::style_bold
-  } else {
-    # nocov start
-    color <- identity
-    emph <- identity
-    # nocov end
-  }
+  color <- switch(x$type,
+    warning = cli::col_magenta,
+    error = cli::col_red,
+    style = cli::col_blue,
+    cli::style_bold
+  )
+  emph <- cli::style_bold
 
+  line_ref <- build_line_ref(x)
   annotated_msg <- paste0(
-    emph(
-      x$filename, ":",
-      as.character(x$line_number), ":",
-      as.character(x$column_number), ": ",
-      sep = ""
-    ),
+    emph(line_ref, ": "),
     color(x$type, ": ", sep = ""),
     "[", x$linter, "] ",
     emph(x$message)
@@ -40,6 +29,19 @@ format.lint <- function(x, ..., width = getOption("lintr.format_width")) {
   )
 }
 
+build_line_ref <- function(x) {
+  line_ref <- paste0(
+    x$filename, ":",
+    as.character(x$line_number), ":",
+    as.character(x$column_number)
+  )
+
+  if (!cli::ansi_has_hyperlink_support()) {
+    return(line_ref)
+  }
+  cli::format_inline("{.path {line_ref}}")
+}
+
 #' @export
 print.lint <- function(x, ...) {
   cat(format(x, ...))