set cran mirror in pkgchk_on_cran if not set

DESCRIPTION

@@ -1,6 +1,6 @@
 Package: pkgcheck
 Title: rOpenSci Package Checks
-Version: 0.1.2.055
+Version: 0.1.2.056
 Authors@R: c(
     person("Mark", "Padgham", , "[email protected]", role = c("aut", "cre"),
            comment = c(ORCID = "0000-0003-2172-5265")),

R/check-on-cran.R

@@ -20,9 +20,15 @@ pkgchk_on_cran <- function (checks) {
     )
     pkg <- desc$Package
 
+    op <- options ()
+    if (is.null (getOption ("repos"))) {
+        # Needed for GitHub runners, because avail.pkgs fails with no mirror set
+        options (repos = c (CRAN = "https://cloud.r-project.org"))
+    }
     ap <- data.frame (utils::available.packages (),
         stringsAsFactors = FALSE
     )
+    options (op)
     res <- pkg %in% ap$Package
 
     if (res) {

codemeta.json

@@ -8,7 +8,7 @@
   "codeRepository": "https://github.com/ropensci-review-tools/pkgcheck",
   "issueTracker": "https://github.com/ropensci-review-tools/pkgcheck/issues",
   "license": "https://spdx.org/licenses/GPL-3.0",
-  "version": "0.1.2.055",
+  "version": "0.1.2.056",
   "programmingLanguage": {
     "@type": "ComputerLanguage",
     "name": "R",