Update Sysreqs

Update embedded sysreqs

pkgdepends ships a bundled copy of the r-hub/r-system-requirements database under inst/sysreqs/. At runtime pkgdepends prefers a freshly-fetched cached copy, but falls back to this embedded one (see sysreqs2_list_rules() in R/sysreqs2.R). This skill refreshes the embedded copy to the current upstream HEAD.

Layout of inst/sysreqs/:

• HEAD — the 40-char upstream commit hash the embedded copy was taken from, plus a trailing newline.
• VERSION — the schema version, matching sysreqs_db_version in R/sysreqs2.R.
• rules/*.json — a full mirror of the upstream rules/ directory (nothing is filtered out).

Steps

1. Clone the upstream repo (shallow) into a scratch/temp dir and read its HEAD:

   git clone --depth 1 https://github.com/r-hub/r-system-requirements.git "$TMPDIR/r-system-requirements"
   git -C "$TMPDIR/r-system-requirements" rev-parse HEAD
   

   (A failed to store: ... keychain warning during clone is harmless in the sandbox.)

2. If that hash already matches inst/sysreqs/HEAD, there is nothing to do — stop and report that it is up to date.

3. Replace the rules and update HEAD (run from the repo root):

   rm -rf inst/sysreqs/rules
   cp -R "$TMPDIR/r-system-requirements/rules" inst/sysreqs/rules
   printf '%s\n' "$(git -C "$TMPDIR/r-system-requirements" rev-parse HEAD)" > inst/sysreqs/HEAD
   

4. Do not touch VERSION unless the upstream JSON schema changed in a way that breaks parsing in sysreqs2_match() / needs different files. If it did, bump both inst/sysreqs/VERSION and sysreqs_db_version in R/sysreqs2.R to the same new value.

5. Sanity-check the result:

   ls inst/sysreqs/rules | grep -v '[.]json$'   # expect no output (json only)
   git status --short inst/sysreqs               # review added/modified/removed rules
   

6. Report the HEAD change (old → new) and a summary of added / modified / removed rules. Commit only if the user asks; the conventional message is Update embedded sysreqs.