Created
March 24, 2024 15:24
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order_by_name <- function(x) { | |
x[order(names(x))] | |
} | |
type_to_collector <- function(type) { | |
# Code adopted from `readr:::collector_find()` | |
get(paste0("col_", type), envir = asNamespace("readr")) | |
} | |
specs_to_list <- function(specs) { | |
if (inherits(specs, "col_spec")) { | |
specs <- specs$cols | |
} | |
specs_list <- lapply(specs, function(x) { | |
type <- gsub("collector_", "", class(x)[1]) | |
if (type == "factor") { | |
x[c("ordered", "include_na")] <- NULL | |
} | |
modifyList(list(type = type), x) | |
}) | |
order_by_name(specs_list) | |
} | |
specs_from_list <- function(specs_list) { | |
lapply(specs_list, function(x) { | |
collector <- type_to_collector(x$type) | |
do.call(collector, x[names(x) != "type"]) | |
}) | |
} | |
read_parsed_specs <- function(file) { | |
specs_from_list(yaml::read_yaml(file)) | |
} | |
update_yaml_list <- function(old, new, overwrite = TRUE) { | |
overlap <- names(new)[names(new) %in% names(old)] | |
if (length(overlap) > 0) { | |
different <- names(setdiff(new[overlap], old[overlap])) | |
} else { | |
return(order_by_name(c(new, old))) | |
} | |
if (length(different) > 0) { | |
diff_vars <- paste(different, collapse = ", ") | |
if (overwrite) { | |
message("Overwriting: ", diff_vars) | |
} else { | |
stop("Set `overwrite = TRUE` to update: ", diff_vars) | |
} | |
} | |
updated <- order_by_name(modifyList(old, new)) | |
updated | |
} | |
write_parsed_specs <- function(parsed_specs, file, overwrite = TRUE) { | |
message("Writing parsed specs to ", file) | |
specs_list <- specs_to_list(parsed_specs) | |
cat(yaml::as.yaml(specs_list)) | |
if (file.exists(file)) { | |
existing <- yaml::read_yaml(file) | |
specs_list <- update_yaml_list(existing, specs_list) | |
} | |
yaml::write_yaml(specs_list, file) | |
} |
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