R: Collect All Function Definitions from a Library - r

Question

I am working with R. I found this previous post on stackoverflow which shows how to get a "list" of all functions that belong to a given library:
How to find all functions in an R package?
For example:
#load desired library
library(ParBayesianOptimization)
#find out all functions from this library
getNamespaceExports("ParBayesianOptimization")
[1] "addIterations" "getLocalOptimums" "bayesOpt" "getBestPars" "changeSaveFile" "updateGP"
The above code tells me the name of all functions that are used in the "ParBayesianOptimization" library. From here, I could manually inspect each one of these functions - for example:
# manually inspect any one of these functions
getAnywhere(bayesOpt)
A single object matching ‘bayesOpt’ was found
It was found in the following places
package:ParBayesianOptimization
namespace:ParBayesianOptimization
with value
#function stats here
function (FUN, bounds, saveFile = NULL, initGrid, initPoints = 4,
iters.n = 3, iters.k = 1, otherHalting = list(timeLimit = Inf,
minUtility = 0), acq = "ucb", kappa = 2.576, eps = 0,
parallel = FALSE, gsPoints = pmax(100, length(bounds)^3),
convThresh = 1e+08, acqThresh = 1, errorHandling = "stop",
plotProgress = FALSE, verbose = 1, ...)
{
startT <- Sys.time()
optObj <- list()
etc etc etc ...
saveFile = saveFile, verbose = verbose, ...)
return(optObj)
}
#function ends here
<bytecode: 0x000001cbb4145db0>
<environment: namespace:ParBayesianOptimization>
Goal : Is it possible to take each one of these functions and create a notepad file with their full definitions?
Something that would look like this:
My attempt:
I thought I could first make an "object" in R that contained all the functions found in this library:
library(plyr)
a = getNamespaceExports("ParBayesianOptimization")
my_list = do.call("rbind.fill", lapply(a, as.data.frame))
X[[i]]
1 addIterations
2 getLocalOptimums
3 bayesOpt
4 getBestPars
5 changeSaveFile
6 updateGP
Then, I could manually create an "assignment arrow":
header_text <- rep("<-")
Then, "paste" this to each function name:
combined_list <- as.character(paste(my_list, header_text, sep = ""))
But this is not looking correct:
combined_list
[1] "c(\"addIterations\", \"getLocalOptimums\", \"bayesOpt\", \"getBestPars\", \"changeSaveFile\", \"updateGP\")<- "
The goal is to automate the process of manually copying/pasting :
function_1 = getAnywhere("first function ParBayesianOptimization library")
function_2 = getAnywhere("second function ParBayesianOptimization library")
etc
final_list = c(function_1, function_2 ...)
And removing the generic description from each function:
A single object matching ‘bayesOpt’ was found
It was found in the following places
package:ParBayesianOptimization
namespace:ParBayesianOptimization
with value
In the end, if I were to "call" the final_list object, all the functions from this library should get recreated and reassigned.
Can someone please show me how to do this?
Thanks

Answer 1

You can use the dump function for this
pkg <- "ParBayesianOptimization"
dump(getNamespaceExports(pkg), file="funs.R", envir = asNamespace(pkg))

Answer 2

This code will help you write the function definitions of all the functions in a library to a text file.
fn_list <- getNamespaceExports("ParBayesianOptimization")
for(i in seq_along(fn_list)) {
header <- paste('\n\n####Function', i, '\n\n\n')
cat(paste0(header, paste0(getAnywhere(fn_list[i]), collapse = '\n'), '\n\n'),
file = 'function.txt', append = TRUE)
}