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29 lines
810 B
R
29 lines
810 B
R
library(rlog)
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#' Run a function caching the result on the file system.
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#'
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#' The function will be called with the appended arguments. The [`id`] argument
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#' will be used to identify the cache file on the file system and in log
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#' messages.
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run_cached <- function(id, func, ...) {
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if (!dir.exists("cache")) {
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dir.create("cache")
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}
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cache_file <- paste("cache/", id, ".rds", sep = "")
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if (file.exists(cache_file)) {
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log_info(sprintf("Loading %s from cache", id))
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# If the cache file exists, we restore the data from it.
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readRDS(cache_file)
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} else {
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# If the cache file doesn't exist, we have to do the computation.
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data <- func(...)
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# The results are cached for the next run.
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saveRDS(data, cache_file)
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data
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}
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}
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