Improve pai print method, remove Travis config

It seems that Travis does not show open source projects on github
any more, as it used to, so finally I am removing the Travis
configuration in this project.

4 files changed, 6 insertions, 46 deletions

diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 1b69aab..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,30 +0,0 @@
-language: c
-sudo: required
-dist: focal
-
-jobs:
-  include:
-    - name: linux
-      os: linux
-
-env:
-  global:
-    - USE_BSPM="true"
-    - RETICULATE_AUTOCONFIGURE="false"
-
-before_install:
-  - curl -OLs https://eddelbuettel.github.io/r-ci/run.sh && chmod 0755 run.sh
-  - ./run.sh bootstrap
-
-install:
-  - ./run.sh install_aptget python3-rdkit
-  - ./run.sh install_all
-
-script:
-  - ./run.sh run_tests
-
-after_failure:
-  - ./run.sh dump_logs
-
-after_success:
-  - travis_wait ./run.sh coverage
diff --git a/DESCRIPTION b/DESCRIPTION
index 71c6c42..6a2d597 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -28,5 +28,5 @@ LazyData: yes
 Encoding: UTF-8
 URL: https://pkgdown.jrwb.de/chents, https://github.com/jranke/chents
 Roxygen: list(markdown = TRUE, r6 = TRUE)
-RoxygenNote: 7.3.3
+RoxygenNote: 7.3.3.9000
 Config/testthat/edition: 3
diff --git a/R/chent.R b/R/chent.R
index 941c445..a159ece 100644
--- a/R/chent.R
+++ b/R/chent.R
@@ -651,18 +651,11 @@ plot.chent = function(x, ...) {
 #' @export
 #' @format An [R6::R6Class] generator object
 #' @examples
-#' # On Travis, we get a certificate validation error,
-#' # likely because the system (xenial) is so old,
-#' # therefore don't run this example on Travis
-#' if (Sys.getenv("TRAVIS") == "") {
-#'
 #' atr <- pai$new("atrazine")
 #' print(atr)
 #' if (!is.null(atr$Picture)) {
 #'   plot(atr)
 #' }
-#'
-#' }
 pai <- R6Class("pai",
   inherit = chent,
   public = list(
@@ -755,7 +748,11 @@ pai <- R6Class("pai",
 #' @param ... Further arguments for compatibility with the S3 method
 #' @export
 print.pai = function(x, ...) {
-  cat("<pai> with ISO common name $iso", x$iso, "\n")
+  if (is.null(x$iso)) {
+    cat("<pai> without ISO common name\n")
+  } else {
+    cat("<pai> with ISO common name $iso", x$iso, "\n")
+  }
   print.chent(x)
   if (length(x$TPs) > 0) {
     cat("\nTransformation products:\n")
diff --git a/man/pai.Rd b/man/pai.Rd
index 279dd24..37508b1 100644
--- a/man/pai.Rd
+++ b/man/pai.Rd
@@ -14,18 +14,11 @@ the complete result of querying the BCPC compendium using
 \link[webchem:bcpc_query]{bcpc_query}.
 }
 \examples{
-# On Travis, we get a certificate validation error,
-# likely because the system (xenial) is so old,
-# therefore don't run this example on Travis
-if (Sys.getenv("TRAVIS") == "") {
-
 atr <- pai$new("atrazine")
 print(atr)
 if (!is.null(atr$Picture)) {
   plot(atr)
 }
-
-}
 }
 \section{Super class}{
 \code{\link[chents:chent]{chents::chent}} -> \code{pai}