Make it possible to render software repository pages on GitHub Actions

[HenrikBengtsson]

Issue

Currently, the page generation of module repositories is done "live", i.e. the script calls spider ... when it renders the page;

c4/docs/software/R/lmod.R

Lines 52 to 59 in b8875b0

	lmod_dir <- file.path(Sys.getenv("LMOD_DIR"))
	stopifnot(nzchar(lmod_dir))
	spider <- file.path(lmod_dir, "spider")
	message(" - spider binary: ", sQuote(spider))
	stopifnot(utils::file_test("-x", spider))
	args <- c("--no_recursion", "-o jsonSoftwarePage", module_path)
	message(" - spider arguments: ", paste(args, collapse = " "))
	json <- system2(spider, args = args, stdout = TRUE)

This prevents us from rendering the page outside of the cluster, e.g. on a local notebook or on GitHub Pages.

Suggestions

To fix this, we can:

1. Dump spider ... output to file, e.g. via a cronjob and commit to the repo
2. Have the page rendering script read spider data from this file

[HenrikBengtsson]

Remaining task:

• store the 'module show` data on file too