Split the macOS and Windows jobs into a PR set, a full set, and a nightly set

The 19 macOS and 32 Windows jobs ran on every push to every pull request.
They now use the same sets as the Ubuntu jobs:

- PR set (16): four Visual Studio 2022 and two Visual Studio 2026
  configurations, ARM64 Debug, Clang 20.1.8 with MinGW, MinGW x86, the
  C++20 module test, Xcode 16.0, 16.4, 26.3 and 26.6, C++14 on the
  latest Xcode, and the Swift Package Manager check.
- full set (34): every other Visual Studio configuration, Clang
  version, clang-cl, Xcode version and C++ standard.
- nightly set (1): 64-bit MinGW, which takes about 68 minutes. A failed
  nightly run opens or updates an issue.

No configuration is removed: tools/ci_jobs/ci_jobs.py --compare lists
157 configurations before and after, and all jobs keep their runner,
steps and environment. ci_jobs.py now checks all three workflows and
expands matrices that consist only of include entries correctly.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

tools/ci_jobs/README.md

@@ -1,6 +1,8 @@
 # ci_jobs
 
-The compiler jobs of [`ubuntu.yml`](../../.github/workflows/ubuntu.yml) are split into three sets, chosen by each job's
+The jobs of the compiler workflows [`ubuntu.yml`](../../.github/workflows/ubuntu.yml),
+[`macos.yml`](../../.github/workflows/macos.yml), and [`windows.yml`](../../.github/workflows/windows.yml) are split into
+three sets, chosen by each job's
 `if:` condition (see [How CI runs](https://json.nlohmann.me/community/quality_assurance/#how-ci-runs)):
 
 - **PR set**: every push to a pull request, and every push to `develop`, `master`, and `release/*`;
@@ -12,8 +14,9 @@ A matrix whose entries belong to different sets is split into one job per set: t
 
 [`ci_jobs.py`](ci_jobs.py) checks that
 
-- every job of `ubuntu.yml` has the `if:` condition of exactly one set (the conditions are in `SETS`),
-- every full-set job waits for (`needs:`) exactly the PR set, and `nightly_report` for exactly the nightly set, and
+- every job has the `if:` condition of exactly one set (the conditions are in `SETS`),
+- every full-set job waits for (`needs:`) exactly the PR set of its workflow, and `nightly_report` for exactly the
+  nightly set, and
 - the job table in [`quality_assurance.md`](../../docs/mkdocs/docs/community/quality_assurance.md) is up to date.
 
 ```shell

tools/ci_jobs/ci_jobs.py

@@ -1,8 +1,8 @@
 #!/usr/bin/env python3
 """List and check the jobs of the compiler workflows and the set each job belongs to.
 
-The jobs of a tiered workflow (ubuntu.yml) belong to one of three sets, chosen
-by the job's `if:` condition:
+The jobs of the compiler workflows belong to one of three sets, chosen by the
+job's `if:` condition:
 
 - PR set: every pull request push and every push,
 - full set: after the PR set passed, on pushes and on pull requests with the
@@ -10,11 +10,9 @@ by the job's `if:` condition:
 - nightly set: nightly on develop, on pushes to master and release/*, and when
   started by hand.
 
-The jobs of the other workflows run on every push and pull request.
-
-The script checks that every job of a tiered workflow belongs to exactly one
-set, that the full set waits for the whole PR set, that the nightly report
-waits for the whole nightly set, and that the job table in
+The script checks that every job belongs to exactly one set, that the full set
+of a workflow waits for its whole PR set, that the nightly report waits for the
+whole nightly set, and that the job table in
 docs/mkdocs/docs/community/quality_assurance.md is up to date.
 
   --markdown       print the job table for the documentation
@@ -37,7 +35,7 @@ DOCS = 'docs/mkdocs/docs/community/quality_assurance.md'
 BEGIN, END = '<!-- ci_jobs: begin -->', '<!-- ci_jobs: end -->'
 
 WORKFLOWS = ['.github/workflows/ubuntu.yml', '.github/workflows/macos.yml', '.github/workflows/windows.yml']
-TIERED = ['.github/workflows/ubuntu.yml']
+TIERED = WORKFLOWS
 # --compare also counts the jobs of these workflows, so a job moved between workflows is not a removed one
 COMPARED = WORKFLOWS + ['.github/workflows/repository_checks.yml', '.github/workflows/check_amalgamation.yml']
 
@@ -80,7 +78,10 @@ def expand(matrix):
     if not matrix:
         return [{}]
     keys = [k for k in matrix if k not in ('include', 'exclude')]
-    combos = [dict(zip(keys, values)) for values in itertools.product(*(matrix[k] for k in keys))] if keys else []
+    if not keys:
+        # a matrix of only include entries runs each entry
+        return [dict(inc) for inc in matrix.get('include') or []]
+    combos = [dict(zip(keys, values)) for values in itertools.product(*(matrix[k] for k in keys))]
     for ex in matrix.get('exclude') or []:
         combos = [c for c in combos if any(c.get(k) != v for k, v in ex.items())]
     for inc in matrix.get('include') or []: