PKGBUILD | PKGBUILDs ; almost all on the AUR , some personal stuff

I'm trying to automate a build process that requires retrieving a list of dependencies from a file and then piping those into a command. I have a loop to auto download the packages I am building, but I need to then read a file and get a list of dependencies. What I'm trying to do is this:

I have a PKGBUILD file (for AUR) which I am maintaining. It has a value 'pkgrel' which I increment by 1 (manually), before building the package each time.

To summarize, if I want to build the package the sixth time, I'll manually set the value as

When executing R CMD build , it each time creates a directory in the temp folder, including log files. If the build fails, I would like to look at this folder and the log files.

Is there a way to (parameter) execute R CMD build so that the temp directory's path is printed to the console? Same problem when using devtools::build() or pkgbuild::pkgbuild(). They did return the path to the tar.gz when the build was successful, but they do not return anything if the build fails.

Description

This issue appears to apply to vectorised and loop approaches to renaming several files. Vectorised approach used in reprex below. The bug only seems to present when filenames do not contain meaningful or alphanumeric strings.

Summary

Existing files prior to file.rename:
"1.R" "2.R" "3.R" "4.R" "5.R".
Existing files following file.rename:
"6.R".
Expected output:
"2.R" "3.R" "4.R" "5.R" "6.R"

Reprex

This is my first time trying to download a Github package, and I'm running into some trouble using RStudio v1.2.5033 on MacOS Big Sur v11.2.1.

Initially, when running

I'm running OpenFOAM on a remote server and basically manage to visualize the results via paraview's pvserver as described here. However upon connection the client yields

Server DISPLAY not accessible!

Display is not accessible on the server side. Remote rendering will be disabled.

which is basically correct, since the server doesn't run an X server. Performance is of course suboptimal since without remote rendering the entire geometry is transferred (I guess it's almost as bad as directly ssh-copying the files to run purely locally). The server does have a simple onboard GPU (c2:00.0 VGA compatible controller: ASPEED Technology, Inc. ASPEED Graphics Family (rev 41) as per lspci), using which might be called plan B since at some point I might switch to a server without GPU or an entirely different one. So instead, I had a look at https://kitware.github.io/paraview-docs/latest/cxx/Offscreen.html, and using Arch Linux I obtained its paraview PKGBUILD via asp checkout paraview and appended the following switches to its build() -> cmake instruction:

Say I have a .app and a .dylib file that I need to install in different locations, one in /Applications and another one in /usr/local/lib. Is it possible to do this through the command line with pkgbuild? I was able to build a .pkg with this same behavior but only with the GUI application.

Goal

I would like to install devtools to my version of R version 3.5.1.

Problem

When I install the package devtools, I get the following error:

I'm trying to install the package TStools for R. I have tried all the suggestion I've found so far through googleing, but nothing works. I get every time the same exact error: