sagemathgh-39467: Disable broken and outdated CI
    
<!-- ^ Please provide a concise and informative title. -->
<!-- ^ Don't put issue numbers in the title, do this in the PR
description below. -->
<!-- ^ For example, instead of "Fixes sagemath#12345" use "Introduce new method
to calculate 1 + 2". -->
<!-- v Describe your changes below in detail. -->
<!-- v Why is this change required? What problem does it solve? -->
<!-- v If this PR resolves an open issue, please link to it here. For
example, "Fixes sagemath#12345". -->

Many of the CI runs after a new release are failing, for months now, see
eg https://github.com/sagemath/sage/actions/runs/12979684199/job/3621812
6145. Some of these failures are genuine (eg a certain package cannot be
built on a certain system) and some others are due to constraints of the
build system (eg running out of free space). Since there is very little
point in senselessly burning energy, all runs that were failing for the
last releases are disabled. Once the underlying issues are fixed, they
can be easily be re-enabled.

Moreover, the "minimal" runs where only a couple of systems packages are
installed and most are build using sage are removed, keeping only the
"standard" where all available system packages (corresponding to
standard sage packages) are installed.

New test run: https://github.com/tobiasdiez/sage/actions/runs/1319937223
2/job/36847711005

### 📝 Checklist

<!-- Put an `x` in all the boxes that apply. -->

- [ ] The title is concise and informative.
- [ ] The description explains in detail what this PR is about.
- [ ] I have linked a relevant issue or discussion.
- [ ] I have created tests covering the changes.
- [ ] I have updated the documentation and checked the documentation
preview.

### ⌛ Dependencies

- sagemath#39251 (to resolve merge conflicts)

<!-- List all open PRs that this PR logically depends on. For example,
-->
<!-- - sagemath#12345: short description why this is a dependency -->
<!-- - sagemath#34567: ... -->
    
URL: sagemath#39467
Reported by: Tobias Diez
Reviewer(s): Dima Pasechnik, Kwankyu Lee, Tobias Diez, user202729

.github/workflows/ci-linux-incremental.yml

@@ -1,6 +1,6 @@
 name: CI Linux incremental
 
-## This GitHub Actions workflow runs SAGE_ROOT/tox.ini with select environments,
+## This GitHub Actions workflow runs SAGE_ROOT/tox.ini with selected environments,
 ## whenever a GitHub pull request is opened or synchronized in a repository
 ## where GitHub Actions are enabled.
 ##
@@ -99,56 +99,9 @@ jobs:
          "debian-bullseye",
          "debian-bookworm",
          "fedora-30",
-         "fedora-40",
-         "gentoo-python3.11",
-         "debian-bullseye-i386"]
+         "fedora-40",]
       tox_packages_factors: >-
           ["standard",
            "minimal"]
       docker_push_repository: ghcr.io/${{ github.repository }}/
       max_parallel: 8
-
-  constraints_pkgs-norequirements:
-    needs: [changed_files]
-    uses: ./.github/workflows/docker.yml
-    with:
-      # Build incrementally from published Docker image
-      incremental: true
-      free_disk_space: true
-      from_docker_repository: ghcr.io/sagemath/sage/
-      from_docker_target: "with-targets-pre"
-      from_docker_tag: "dev"
-      docker_targets: "with-targets-pre"
-      targets_pre: "${{needs.changed_files.outputs.build_targets}} all-sage-local python3-ensure tox-ensure sagelib-tox-sagepython-constraints_pkgs-norequirements"
-      tox_system_factors: >-
-        ["ubuntu-focal",
-         "ubuntu-noble",
-         "debian-bookworm",
-         "fedora-40",
-         "debian-bullseye-i386"]
-      tox_packages_factors: >-
-          ["standard"]
-      docker_push_repository: ghcr.io/${{ github.repository }}/
-      max_parallel: 16
-
-  site:
-    needs: [changed_files]
-    uses: ./.github/workflows/docker.yml
-    with:
-      # Build incrementally from published Docker image
-      incremental: true
-      free_disk_space: true
-      from_docker_repository: ghcr.io/sagemath/sage/
-      from_docker_target: "with-targets"
-      from_docker_tag: "dev"
-      docker_targets: "with-targets"
-      targets: "${{needs.changed_files.outputs.build_targets}} doc-html ptest-nodoc"
-      # Only test systems with a usable system python (>= 3.9)
-      # with only a small number of test failures as of 10.2.rc0
-      tox_system_factors: >-
-        ["gentoo-python3.11",
-         "archlinux-latest",
-         "fedora-40"]
-      tox_packages_factors: >-
-          ["standard-sitepackages"]
-      docker_push_repository: ghcr.io/${{ github.repository }}/

.github/workflows/ci-linux.yml

@@ -1,8 +1,7 @@
 name: CI Linux
 
-## This GitHub Actions workflow runs SAGE_ROOT/tox.ini with select environments,
-## whenever a GitHub pull request is opened or synchronized in a repository
-## where GitHub Actions are enabled.
+## This GitHub Actions workflow runs SAGE_ROOT/tox.ini with selected environments,
+## whenever a tag is pushed.
 ##
 ## It builds and checks some sage spkgs as defined in TARGETS.
 ##
@@ -33,29 +32,7 @@ permissions:
   packages: write
 
 jobs:
-
-  # standard (without ptest) for the default platform (used by build.yml etc.)
-  default:
-    uses: ./.github/workflows/docker.yml
-    with:
-      # Build from scratch
-      free_disk_space: true
-      docker_targets: "with-system-packages configured with-targets-pre with-targets"
-      # FIXME: duplicated from env.TARGETS
-      targets_pre: all-sage-local
-      targets: build doc-html
-      targets_optional: ptest
-      tox_system_factors: >-
-        ["ubuntu-jammy"]
-      tox_packages_factors: >-
-        ["standard"]
-      docker_push_repository: ghcr.io/${{ github.repository }}/
-      logs_artifact: false
-
-  # All platforms. This duplicates the default platform, but why not,
-  # it makes it more robust regarding random timeouts.
-
-  standard:
+  minimal:
     if: ${{ success() || failure() }}
     uses: ./.github/workflows/docker.yml
     with:
@@ -66,124 +43,21 @@ jobs:
       targets_pre: all-sage-local
       targets: build doc-html
       targets_optional: ptest
+      tox_system_factors: >-
+          ["ubuntu-jammy"]
       tox_packages_factors: >-
-          ["standard"]
+          ["minimal"]
       docker_push_repository: ghcr.io/${{ github.repository }}/
-      # Make sure that all "standard" jobs can start simultaneously,
-      # so that runners are available by the time that "default" starts.
-      max_parallel: 50
-
-  standard-constraints_pkgs-norequirements:
-    if: ${{ success() || failure() }}
-    needs: [standard]
-    uses: ./.github/workflows/docker.yml
-    with:
-      # Build incrementally from previous stage (pre)
-      incremental: true
-      free_disk_space: true
-      from_docker_repository: ghcr.io/${{ github.repository }}/
-      from_docker_target: "with-targets-pre"
-      docker_targets: "with-targets-pre"
-      targets_pre: all-sage-local python3-ensure tox-ensure sagelib-tox-sagepython-constraints_pkgs-norequirements
-      tox_packages_factors: >-
-          ["standard"]
-      max_parallel: 15
 
-  standard-sitepackages:
-    if: ${{ success() || failure() }}
-    needs: [standard]
+  standard:
     uses: ./.github/workflows/docker.yml
     with:
-      # Build incrementally from previous stage (pre)
-      incremental: true
       free_disk_space: true
-      from_docker_repository: ghcr.io/${{ github.repository }}/
-      from_docker_target: "with-targets-pre"
-      docker_targets: "with-targets with-targets-optional"
-      # FIXME: duplicated from env.TARGETS
-      targets: build doc-html
-      targets_optional: ptest
-      tox_packages_factors: >-
-        ["standard-sitepackages"]
-      # Only test systems with a usable system python (>= 3.9)
-      tox_system_factors: >-
-        ["ubuntu-jammy",
-         "ubuntu-lunar",
-         "ubuntu-mantic",
-         "debian-bookworm",
-         "debian-trixie",
-         "debian-sid",
-         "linuxmint-21.1",
-         "linuxmint-21.2",
-         "fedora-40",
-         "centos-stream-9-python3.9",
-         "almalinux-8-python3.9",
-         "gentoo-python3.10",
-         "gentoo-python3.11",
-         "archlinux-latest",
-         "opensuse-15.5-gcc_11-python3.11",
-         "opensuse-tumbleweed-python3.10",
-         "opensuse-tumbleweed"]
-      docker_push_repository: ghcr.io/${{ github.repository }}/
-      max_parallel: 8
-
-  minimal:
-    if: ${{ success() || failure() }}
-    uses: ./.github/workflows/docker.yml
-    with:
       # Build from scratch
-      free_disk_space: true
       docker_targets: "with-system-packages configured with-targets-pre with-targets with-targets-optional"
-      # FIXME: duplicated from env.TARGETS
       targets_pre: all-sage-local
       targets: build doc-html
       targets_optional: ptest
       tox_packages_factors: >-
-          ["minimal"]
-      docker_push_repository: ghcr.io/${{ github.repository }}/
-      # Reduced from 30 because it may run in parallel with 'standard' and 'standard-sitepackages' above.
-      # Calibrated for clogging the job pipeline until the "default" job has finished.
-      max_parallel: 24
-
-  maximal-pre:
-    if: ${{ success() || failure() }}
-    needs: [minimal]
-    uses: ./.github/workflows/docker.yml
-    with:
-      free_disk_space: true
-      # Build from scratch
-      docker_targets: "with-system-packages configured with-targets-pre"
-      # FIXME: duplicated from env.TARGETS
-      targets_pre: all-sage-local
-      tox_packages_factors: >-
-          ["maximal"]
+          ["standard"]
       docker_push_repository: ghcr.io/${{ github.repository }}/
-
-  optional:
-    if: ${{ success() || failure() }}
-    needs: [maximal-pre]
-    uses: ./.github/workflows/docker.yml
-    with:
-      incremental: true
-      free_disk_space: true
-      from_docker_repository: ghcr.io/${{ github.repository }}/
-      from_docker_target: "with-targets-pre"
-      tox_packages_factors: >-
-          ["maximal"]
-      docker_targets: "with-targets-optional"
-      # We remove packages starting with _, in particular package _develop
-      targets_optional: '$(echo $(export PATH=build/bin:$PATH && sage-package list :optional: --has-file "spkg-install.in|spkg-install|requirements.txt" --no-file "huge|has_nonfree_dependencies" | grep -v sagemath_doc | grep -v ^_))'
-
-  experimental:
-    if: ${{ success() || failure() }}
-    needs: [optional]
-    uses: ./.github/workflows/docker.yml
-    with:
-      incremental: true
-      free_disk_space: true
-      from_docker_repository: ghcr.io/${{ github.repository }}/
-      from_docker_target: "with-targets-pre"
-      tox_packages_factors: >-
-          ["maximal"]
-      docker_targets: "with-targets-optional"
-      targets_optional: '$(echo $(export PATH=build/bin:$PATH && sage-package list :experimental: --has-file "spkg-install.in|spkg-install|requirements.txt" --no-file "huge|has_nonfree_dependencies" | grep -v sagemath_doc))'

.github/workflows/ci-macos.yml

@@ -99,61 +99,3 @@ jobs:
         with:
           path: "dist/*.tar.gz"
           name: dist
-
-  local-macos-nohomebrew:
-
-    needs: [dist]
-
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      max-parallel: 4
-      matrix:
-        os: [ macos-12, macos-13, macos-14 ]
-        tox_system_factor: [macos-nobootstrap]
-        tox_packages_factor: [minimal]
-        xcode_version_factor: [default]
-    env:
-      TOX_ENV: local-${{ matrix.tox_system_factor }}-${{ matrix.tox_packages_factor }}
-      LOGS_ARTIFACT_NAME: logs-commit-${{ github.sha }}-tox-local-${{ matrix.tox_system_factor }}-${{ matrix.tox_packages_factor }}-xcode_${{ matrix.xcode_version_factor }}
-    steps:
-      - uses: actions/checkout@v4
-        if: "!contains(matrix.tox_system_factor, 'nobootstrap')"
-      - uses: actions/download-artifact@v4
-        with:
-          path: .
-          name: dist
-        if: contains(matrix.tox_system_factor, 'nobootstrap')
-      - name: Unpack sage dist
-        run: |
-          tar xf sage*.tar.gz --strip-components=1
-        if: contains(matrix.tox_system_factor, 'nobootstrap')
-      - name: Move homebrew away
-        run: |
-          (cd $(brew --prefix) && for a in bin etc include lib opt sbin share; do sudo mv $a $a-moved; done)
-      - name: Select Xcode version
-        run: |
-          if [ ${{ matrix.xcode_version_factor }} != default ]; then sudo xcode-select -s /Applications/Xcode_${{ matrix.xcode_version_factor }}.app; fi
-      - name: Install test prerequisites
-        run: |
-          sudo /usr/bin/python3 -m pip install tox
-      - name: Build and test with tox
-        # We use a high parallelization on purpose in order to catch possible parallelization bugs in the build scripts.
-        # For doctesting, we use a lower parallelization to avoid timeouts.
-        run: |
-          (sleep 20000; pkill make) &
-          MAKE="make -j12" tox -e $TOX_ENV -- SAGE_NUM_THREADS=6 $TARGETS
-      - name: Prepare logs artifact
-        run: |
-          mkdir -p "artifacts/$LOGS_ARTIFACT_NAME"; cp -r .tox/*/log "artifacts/$LOGS_ARTIFACT_NAME"
-        if: always()
-      - uses: actions/upload-artifact@v4
-        with:
-          path: artifacts
-          name: ${{ env.LOGS_ARTIFACT_NAME }}
-        if: always()
-      - name: Print out logs for immediate inspection
-        # and markup the output with GitHub Actions logging commands
-        run: |
-          .github/workflows/scan-logs.sh "artifacts/$LOGS_ARTIFACT_NAME"
-        if: always()

.github/workflows/docker.yml

@@ -19,49 +19,25 @@ on:
         default: >-
           [
            "ubuntu-xenial-toolchain-gcc_9",
-           "ubuntu-bionic-gcc_8",
            "ubuntu-focal",
            "ubuntu-jammy",
-           "ubuntu-lunar",
-           "ubuntu-mantic",
-           "ubuntu-noble",
            "debian-bullseye",
            "debian-bookworm",
-           "debian-trixie",
-           "debian-sid",
-           "linuxmint-20.1",
            "linuxmint-20.2",
            "linuxmint-20.3",
            "linuxmint-21",
            "linuxmint-21.1",
            "linuxmint-21.2",
            "linuxmint-21.3",
-           "fedora-30",
-           "fedora-31",
-           "fedora-32",
-           "fedora-33",
-           "fedora-34",
-           "fedora-35",
-           "fedora-36",
-           "fedora-37",
-           "fedora-38",
-           "fedora-39",
            "fedora-40",
            "fedora-41",
            "centos-stream-9",
            "centos-stream-9-python3.12",
-           "almalinux-8-python3.9",
            "almalinux-9-python3.11",
-           "gentoo-python3.10",
-           "gentoo-python3.11",
-           "gentoo-python3.12",
            "archlinux-latest",
            "opensuse-15.5-gcc_11-python3.11",
            "opensuse-tumbleweed-python3.10",
            "opensuse-tumbleweed",
-           "conda-forge-python3.11",
-           "ubuntu-bionic-gcc_8-i386",
-           "debian-bullseye-i386",
           ]
         # 'tox -e update_docker_platforms' updates above
       tox_packages_factors:

.github/workflows/macos.yml

@@ -23,15 +23,9 @@ on:
         # https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners/about-github-hosted-runners#standard-github-hosted-runners-for-public-repositories
         description: 'Stringified JSON object'
         default: >-
-          [["12",     "",             "homebrew-macos-usrlocal-minimal"],
-           ["12",     "",             "homebrew-macos-usrlocal-standard"],
-           ["12",     "",             "homebrew-macos-usrlocal-python3_xcode-standard"],
-           ["12",     "",             "homebrew-macos-usrlocal-maximal"],
-           ["13",     "xcode_15.0",   "homebrew-macos-usrlocal-standard"],
+          [
            ["latest", "",             "homebrew-macos-opthomebrew-standard"],
-           ["13",     "",             "conda-forge-macos-minimal"],
-           ["13",     "",             "conda-forge-macos-standard"],
-           ["latest", "",             "conda-forge-macos-standard"]]
+          ]
         type: string
       extra_sage_packages:
         description: 'Extra Sage packages to install as system packages'

src/doc/en/developer/github.rst

@@ -462,7 +462,7 @@ Actions.
   test. Details are again available by clicking on the check.
 
   The automatic workflow runs on a container based on
-  ``ubuntu-focal-standard``.  To request a run of the workflow on a different
+  ``ubuntu``.  To request a run of the workflow on a different
   platform, you can issue a `workflow dispatch
   <https://docs.github.com/en/actions/managing-workflow-runs/manually-running-a-workflow#running-a-workflow>`_.
   You can select any of the platforms for which a `prebuilt container image

src/doc/en/developer/portability_testing.rst

@@ -1139,7 +1139,8 @@ makes them available on `GitHub Packages
 <https://github.com/features/packages>`_ (ghcr.io).
 
 This makes it easy for developers to debug problems that showed up in
-the build logs for a given platform.
+the build logs for a given platform. These images are not intended for production
+deployment.
 
 The image version corresponding to the latest development release
 receives the additional Docker tag ``dev``, see for example the Docker
@@ -1188,6 +1189,9 @@ are available:
   installation of Sage, including the HTML documentation, but ``make
   ptest`` has not been run yet.
 
+Note that some of these images are outdated due to build errors.
+Moreover, standard and minimal images are discontinued.
+
 .. only:: html
 
    .. include:: portability_platform_table.rst