CI: download quantlib on macos if not found locally

[jeroen]

This will allow the package to be built in CI or r-universe or by mac users locally, with the same quantlib as CRAN.

On systems where quantlib-config is found (such as cran itself), that configuration is used, and nothing is downloaded. So it functions as a fallback method for mac systems where quantlib is not available.

PS: if you use this, I recommend mirroring the downloaded files from cran somewhere (e.g. github release assets) because mac.r-project.org is pretty slow and flaky.

[eddelbuettel]

That looks promising. Is that 'mac' directory at CRAN browseable?

[jeroen]

The build works, but one of your tests has a weird error: Cannot supply LdFlags as none . I think your tests are assuming that quantlib-config is always available? (which is not the case for static lib or prebuilt binaries).

rquantlib/R/inline.R

Lines 38 to 49 in 8540c94

	## on Linux and OS X, see if we have quantlib-config which may well be
	## false in the case of prebuild binary packages as eg r-cran-rquantlib
	## on Debian / Ubuntu as well as the OS X package from CRAN
	## first we check whether we have quantlib-config in the path
	if (isTRUE(unname(Sys.which("quantlib-config")) != "")) {
	qc <- system("bash -c 'type -p quantlib-config'", ignore.stderr=TRUE, intern=TRUE)
	if (is.character(qc) && nchar(qc) > 1) {
	qlcflags <- system(paste(qc, "--cflags"), intern = TRUE)
	qllibs <- system(paste(qc, "--libs"), intern = TRUE)
	}
	}
	}

[eddelbuettel]

I think your tests are assuming that quantlib-config is always available?

Is it my tests, or my 'ad-hoc' build script used by the test? It could just be the latter.

Feel free for brute force testing to comment out the overtall hook into tinytest from tests/tinytest.R. If we have a build working (and I really appreciate the helping hand!) we can possibly tweak the rest in step two.

[jeroen]

OK I disabled that test on mac (that was already disabled on windows) so the build passes now.

[eddelbuettel]

Nice.

In the flurry you may have missed what I asked earlier

Is that 'mac' directory at CRAN browseable?

I.e. can I know how old his packages are? But I answered that by pointing a browser at https://mac.r-project.org/bin/darwin20/arm64/. Looks like Simon updates once a year or more often if he musts.

[jeroen]

They updated the libs last month for the R 4.3 release, but I suspect not much updates for another 2 years after this until they bump to a new macos version.

[eddelbuettel]

Of course now I have to figure out how to only trigger macOS when I have the patience for it :)

[jeroen]

The build will be a bit faster if you mirror those 4 files to some of faster server (or just anywhere on github):

rquantlib/configure.ac

Lines 93 to 99 in af4e4c6

	if test "`arch`" == "arm64" ; then
	quantlib="https://mac.r-project.org/bin/darwin20/arm64/QuantLib-1.27.1-darwin.20-arm64.tar.xz"
	boost="https://mac.r-project.org/bin/darwin20/arm64/boost-1.80.0-darwin.20-arm64.tar.xz"
	else
	quantlib="https://mac.r-project.org/bin/darwin20/x86_64/QuantLib-1.27.1-darwin.20-x86_64.tar.xz"
	boost="https://mac.r-project.org/bin/darwin20/x86_64/boost-1.80.0-darwin.20-x86_64.tar.xz"
	fi

Either way good luck, I'm done for the day.