Add quiet argument to quarto_preview

DESCRIPTION

@@ -1,6 +1,6 @@
 Package: quarto
 Title: R Interface to 'Quarto' Markdown Publishing System
-Version: 1.4.4.9006
+Version: 1.4.4.9007
 Authors@R: c(
     person("JJ", "Allaire", , "[email protected]", role = "aut",
            comment = c(ORCID = "0000-0003-0174-9868")),

NEWS.md

@@ -1,5 +1,7 @@
 # quarto (development version)
 
+- `quarto_preview()` gains a `quiet` argument to suppress any output from R or Quarto CLI (thanks, @cwickham, #232.)
+
 - Add some helpers function `theme_brand_*` and `theme_colors_*` to help theme with dark and light brand using some common graph and table packages (thanks,  @gordonwoodhull, [#234](https://github.com/quarto-dev/quarto-r/issues/234)).
 
 - Add `quarto.quiet` options to allow more verbose error message when `quarto_*` function are used inside other package. 

R/daemon.R

@@ -6,7 +6,9 @@ run_serve_daemon <- function(
   render,
   port,
   host,
-  browse
+  browse,
+  quiet = FALSE,
+  .call = rlang::caller_env()
 ) {
   # resolve target if provided
   if (!is.null(target)) {
@@ -39,14 +41,14 @@ run_serve_daemon <- function(
     } else {
       port <- find_port()
       if (is.null(port)) {
-        stop("Unable to find port to start server on")
+        cli::cli_abort("Unable to find port to start server on.", call = .call)
       }
     }
   }
 
   # check for port availability
   if (port_active(port)) {
-    stop("Server port ", port, " already in use.")
+    cli::cli_abort("Server port {port} already in use.", call = .call)
   }
 
   # command and target
@@ -75,6 +77,13 @@ run_serve_daemon <- function(
   # no browse (we'll use browseURL)
   args <- c(args, "--no-browse")
 
+  # quiet mode
+  quiet_msg_suffix <- NULL
+  if (is_quiet(quiet)) {
+    args <- cli_arg_quiet(args)
+    quiet_msg_suffix <- " Set {.code quiet = FALSE} to have more information from quarto CLI output."
+  }
+
   # add extra args
   args <- c(args, extra_args)
 
@@ -92,10 +101,12 @@ run_serve_daemon <- function(
   init <- ""
   while (!port_active(port)) {
     quarto[[ps_key]]$poll_io(50)
-    cat(quarto[[ps_key]]$read_output())
+    if (isFALSE(quiet)) {
+      cat(quarto[[ps_key]]$read_output())
+    }
     if (!quarto[[ps_key]]$is_alive()) {
       stop_serve_daemon(command)
-      stop("Error starting quarto")
+      cli::cli_abort(c(x = "Error starting quarto.", quiet_msg_suffix))
     }
   }
   quarto[[port_key]] <- port
@@ -105,22 +116,28 @@ run_serve_daemon <- function(
     if (is.null(quarto[[ps_key]])) {
       return()
     }
-    ro <- quarto[[ps_key]]$read_output()
-    cat(ro)
-    # Look at url to browse too in `quarto preview log`
-    if (
-      !isFALSE(browse) &&
-        is.null(quarto[[url_key]]) &&
-        grepl("Browse at https?://", ro)
-    ) {
-      m <- regexec("Browse at (https?://[^ ]+)\n", ro)
-      quarto[[url_key]] <- regmatches(ro, m)[[1]][2]
+    # No output to read url from if quiet
+    if (isFALSE(quiet)) {
+      ro <- quarto[[ps_key]]$read_output()
+      cat(ro)
+      # Look at url to browse too in `quarto preview log`
+      if (
+        !isFALSE(browse) &&
+          is.null(quarto[[url_key]]) &&
+          grepl("Browse at https?://", ro)
+      ) {
+        m <- regexec("Browse at (https?://[^ ]+)\n", ro)
+        quarto[[url_key]] <- regmatches(ro, m)[[1]][2]
+      }
     }
     if (!quarto[[ps_key]]$is_alive()) {
       status <- quarto[[ps_key]]$get_exit_status()
       quarto[[ps_key]] <- NULL
       if (status != 0) {
-        stop("Error running quarto ", command)
+        cli::cli_abort(c(
+          x = "Error running {.code quarto {command}}.",
+          quiet_msg_suffix
+        ))
       }
       return()
     }
@@ -129,7 +146,13 @@ run_serve_daemon <- function(
   poll_process()
 
   # indicate server is running
-  cat(paste0("Stop the preview with quarto_", command, "_stop()"))
+  if (isFALSE(quiet)) {
+    cli::cli
+    cli::cli_inform(c(
+      "",
+      i = "Stop the preview with {.code quarto_{command}_stop()}"
+    ))
+  }
 
   # run the preview browser
   if (!isFALSE(browse)) {

R/preview.R

@@ -21,6 +21,8 @@
 #' @param watch Watch for changes and automatically reload browser.
 #' @param navigate Automatically navigate the preview browser to the most
 #'   recently rendered document.
+#' @param quiet Suppress warning and other messages, from R and also Quarto CLI
+#'   (i.e `--quiet` is passed as command line)
 #'
 #' @importFrom processx process
 #' @importFrom rstudioapi isAvailable
@@ -52,7 +54,8 @@ quarto_preview <- function(
   host = "127.0.0.1",
   browse = TRUE,
   watch = TRUE,
-  navigate = TRUE
+  navigate = TRUE,
+  quiet = FALSE
 ) {
   # default for file
   if (is.null(file)) {
@@ -77,7 +80,8 @@ quarto_preview <- function(
     render,
     port,
     host,
-    browse
+    browse,
+    quiet = quiet
   )
 }