Adding article with links to old website versions

.Rbuildignore

@@ -29,3 +29,4 @@
 ^staged_dependencies.yaml$
 ^inst/dev_dependencies.R$
 ^\.devcontainer$
+^vignettes/articles$

DESCRIPTION

@@ -62,3 +62,4 @@ Suggests:
     tibble
 VignetteBuilder: knitr
 Config/testthat/edition: 3
+Config/Needs/website: gert

vignettes/.gitignore

@@ -0,0 +1,2 @@
+*.html
+*.R

vignettes/articles/website-versions.Rmd

@@ -0,0 +1,68 @@
+---
+title: "Previous Versions of Website"
+---
+
+```{r, include = FALSE}
+# TO USE THIS ARTICLE, THE DESCRIPTION FILE MUST INCLUDE
+# Config/Needs/website: gert
+
+knitr::opts_chunk$set(
+  collapse = TRUE,
+  comment = "#>"
+)
+```
+
+```{r setup, include=FALSE}
+base_url <-
+  "https://pharmaverse.github.io/admiral/" # include the trailing backslash!
+
+# get list of all files in the `gh-pages` branch
+df_all_files <- gert::git_ls(ref = "gh-pages")
+
+# extract all folders in the root of the branch
+all_folders <-
+  sub("/.*", "", df_all_files$path)[grepl(
+    x = df_all_files$path,
+    pattern = "/",
+    fixed = TRUE
+  )] |>
+  unique()
+
+# subset to all version folders
+all_version_folders <- all_folders[grep("^v[0-9]+", x = all_folders)]
+
+# release dates of prior tags
+df_tags <- gert::git_tag_list()
+df_tags <- df_tags[df_tags$name %in% all_version_folders, ]
+df_tags$date <-
+  lapply(
+    df_tags$commit,
+    FUN = function(x) {
+      tryCatch(
+        gert::git_commit_info(ref = x)$time |> as.Date() |> as.character(),
+        error = function(x) NA
+      )
+    }
+  ) |>
+  unlist()
+df_tags <- df_tags[!is.na(df_tags$date), ]
+df_tags
+
+lst_tag_dates <-
+  paste0(" (", df_tags$date, ")") |>
+  as.list() |>
+  setNames(df_tags$name)
+
+# string with all markdown links
+str_website_links <-
+  lapply(
+    X = all_version_folders |> rev(),
+    FUN = function(x) {
+      paste0("[", x, lst_tag_dates[[x]], "](", paste0(base_url, x), ")")
+    }
+  ) |>
+  unlist() |>
+  paste(collapse = "\n\n")
+```
+
+`r str_website_links`