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yaml-fieldguide.Rmd
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yaml-fieldguide.Rmd
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---
title: "The YAML Fieldguide"
output:
prettydoc::html_pretty:
theme: tactile
vignette: >
%\VignetteIndexEntry{The YAML Fieldguide}
%\VignetteEngine{knitr::rmarkdown}
%\VignetteEncoding{UTF-8}
---
```{r, include = FALSE}
knitr::opts_chunk$set(
echo = FALSE,
message = FALSE,
collapse = TRUE,
comment = "",
warning = FALSE
)
```
```{r pandoc_check, echo=FALSE}
if (!rmarkdown::pandoc_available()) {
cat("pandoc is required to use ymlthis. Please visit https://pandoc.org/ for more information.")
knitr::knit_exit()
}
```
```{r roxygen_check, echo=FALSE}
if (!requireNamespace("roxygen2")) {
cat("roxygen2 is required to render this vignette: `install.packages('roxygen2'`")
knitr::knit_exit()
}
```
```{r setup}
library(ymlthis)
oldoption <- options(devtools.name = "Malcolm Barrett", crayon.enabled = FALSE)
function_name <- function(x) {
function_call <- x$call
ifelse(rlang::has_length(function_call), as.character(function_call[[2]]), NA)
}
block_names <- function(x) x$tags %>% purrr::map_chr(~.x$tag)
get_doc_name <- function(x) {
tags <- block_names(x)
rdname_index <- which(tags == "rdname")
if (purrr::is_empty(rdname_index)) return(function_name(x))
x$tags[[rdname_index]]$val
}
get_params <- function(x) {
param_lists <- which(block_names(x) == "param")
f <- get_doc_name(x)
if (!rlang::has_length(param_lists) || is.na(f)) return(data.frame())
params_desc <- x$tags[param_lists] %>%
purrr::map(~as.data.frame(.x$val, stringsAsFactors = FALSE)) %>%
do.call(rbind, .)
params_desc$description <- stringr::str_replace_all(
params_desc$description,
"\n",
" "
)
params_desc$name <- params_desc$name %>%
stringr::str_split(",") %>%
purrr::map_chr(
~paste0("`", .x, "`") %>% paste(collapse = ", ")
)
cbind(func = f, params_desc, stringsAsFactors = FALSE)
}
link_help_page <- function(x) {
url <- "https://ymlthis.r-lib.org/"
glue::glue("<a href='{url}/reference/{x}.html'>{x}</a>")
}
filter_kable <- function(.tbl, .pattern = NULL, caption = NULL) {
if (!is.null(.pattern)) {
index <- stringr::str_detect(.tbl$func, .pattern)
.tbl <- .tbl[index, ]
}
.tbl$func <- link_help_page(.tbl$func)
knitr::kable(
.tbl,
col.names = c("Help Page", "Argument", "Description"),
row.names = FALSE,
caption = caption
)
}
fields_df <- roxygen2::parse_package("../") %>%
purrr::map(get_params) %>%
do.call(rbind, .)
```
**ymlthis** attempts to write common YAML for you in the right way and to document the many YAML field options in one place. The fieldguide is a collection of all the fields documented in the **ymlthis** help pages, organized by source. Note that some argument names do not match the YAML field name exactly in order because not all field names are valid R names (e.g. the `link-citations` YAML field needs to be `link_citations` in R); these differences are noted in the argument description. Additionally, not all of these arguments are top-level YAML; see the linked help pages for more details.
## Basic YAML
```{r}
fields_df %>%
filter_kable("yml_author|yml_runtime|yml_clean|yml_toc", caption = "Basic YAML")
```
The nested fields for the `output` field are based on the arguments of the output function. See the help page for the function you are using, e.g., `?rmarkdown::pdf_document`.
## LaTeX/PDF Options
```{r}
fields_df %>%
filter_kable("latex", caption = "LaTeX/PDF Options")
```
## R Markdown Websites
```{r}
fields_df %>%
filter_kable("site|navbar|vignette", caption = "R Markdown Websites")
```
## Citations
```{r}
fields_df %>%
filter_kable("citations", caption = "Citations")
```
## blogdown YAML
```{r}
fields_df %>%
filter_kable("yml_blogdown_opts", caption = "blogdown YAML")
```
## bookdown YAML
```{r}
fields_df %>%
filter_kable("bookdown", caption = "bookdown YAML")
```
## pkgdown YAML
```{r}
fields_df %>%
filter_kable("yml_pkgdown", caption = "pkgdown YAML")
```
## pagedown YAML
```{r}
fields_df %>%
filter_kable("pagedown", caption = "pagedown YAML")
```
## distill YAML
```{r}
fields_df %>%
filter_kable("distill", caption = "distill YAML")
```
## rticles YAML
```{r}
fields_df %>%
filter_kable("rticles", caption = "rticles YAML")
```
## RStudio Connect Scheduled Email YAML
```{r}
fields_df %>%
filter_kable("rsconnect", caption = "RStudio Connect Scheduled Email YAML")
```
```{r, include=FALSE}
options(oldoption)
```