Merge #266: Update cargo-rbmt and fix CI

89f15f4 update rust nightly version to 2026-04-17 (Andrew Poelstra)
da385d7 clippy: trivial stuff (Andrew Poelstra)
555270f clippy: use &&, not &, on bools (Andrew Poelstra)
b246b93 cron-weekly-update: copy toolchain update files from rust-bitcoin (Andrew Poelstra)
e57e698 move nightly-version to Cargo.toml (Andrew Poelstra)
526c950 update Cargo.tomls to whitelist duplicate hex-conservative dep (Andrew Poelstra)
4b5b7c5 update cargo-rbmt (Andrew Poelstra)

Pull request description:

  This overhauls the CI system (again) by copying all the files from rust-bech32 and rust-bitcoin and making minor tweaks for rust-elements.

  This should fix the `doc_auto_cfg` thing which is plaguing #257, and should overall be much more reliable going forward since it's much more agressive about pinning toolchain versions etc.

  This does not re-enable the fuzz tests (which were not covered by the previous CI and not covered by this one); do this will require I migrate the old honggfuzz-based fuzz targets to cargo-fuzz ones, and require I migrate the ancient travis-fuzz.sh script to our more modern one. Will do this in a separate PR.

ACKs for top commit:
  delta1:
    ACK 89f15f4; ran tests locally

Tree-SHA512: ee55582f3c8f61a7c3ccde3582d1a207e8d584e4dbbabe38a677c4bf4221d920f0ea5e80fe410ad2828f8e8ee513ad307aa0e47f59fd58725ef2daf78d9ae52c

Author: delta1

.github/actions/checkout-maintainer-tools/action.yml

@@ -1,41 +1,35 @@
 name: Update Nightly rustc
 on:
   schedule:
-    - cron: "5 0 * * 1" # runs every Monday at 00:05 UTC
+    - cron: "5 0 * * 6" # Saturday at 00:05
   workflow_dispatch: # allows manual triggering
+permissions: {}
 jobs:
   format:
     name: Update nightly rustc
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
+    permissions:
+      contents: write
+      id-token: write
+      pull-requests: write
     steps:
-      - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@nightly
-      - name: Update rust.yml to use latest nightly
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        with:
+          persist-credentials: false
+      - name: Install cargo-rbmt
+        run: cargo install --git https://github.com/rust-bitcoin/rust-bitcoin-maintainer-tools.git --rev $(cat rbmt-version) cargo-rbmt
+      - name: Update nightly toolchain in Cargo.toml
         run: |
-          set -x
-          # Not every night has a nightly, so extract the date from whatever
-          # version of the compiler dtolnay/rust-toolchain gives us.
-          NIGHTLY_DATE=$(rustc +nightly --verbose --version | sed -ne 's/^commit-date: //p')
-          # Update the nightly version in the reference file.
-          echo "nightly-${NIGHTLY_DATE}" > nightly-version
-          echo "nightly_date=${NIGHTLY_DATE}" >> $GITHUB_ENV
-          # Some days there is no new nightly. In this case don't make an empty PR.
-          if ! git diff --exit-code > /dev/null; then
-              echo "Updated nightly. Opening PR."
-              echo "changes_made=true" >> $GITHUB_ENV
-          else
-              echo "Attempted to update nightly but the latest-nightly date did not change. Not opening any PR."
-              echo "changes_made=false" >> $GITHUB_ENV
-          fi
+          eval "$(cargo rbmt toolchains --update-nightly)"
+          echo "nightly_version=$RBMT_NIGHTLY" >> $GITHUB_ENV
       - name: Create Pull Request
-        if: env.changes_made == 'true'
-        uses: peter-evans/create-pull-request@v6
+        uses: peter-evans/create-pull-request@271a8d0340265f705b14b6d32b9829c1cb33d45e # v7.0.8
         with:
           token: ${{ secrets.APOELSTRA_CREATE_PR_TOKEN }}
           author: Update Nightly Rustc Bot <bot@example.com>
           committer: Update Nightly Rustc Bot <bot@example.com>
-          title: Automated daily update to rustc (to nightly-${{ env.nightly_date }})
+          title: Automated daily update to rustc (to ${{ env.nightly_version }})
           body: |
-           Automated update to Github CI workflow `rust.yml` by [create-pull-request](https://github.com/peter-evans/create-pull-request) GitHub action
-          commit-message: Automated update to Github CI to rustc nightly-${{ env.nightly_date }}
+           Automated update to Cargo.toml workspace metadata by [create-pull-request](https://github.com/peter-evans/create-pull-request) GitHub action
+          commit-message: Automated update to rustc ${{ env.nightly_version }}
           branch: create-pull-request/daily-nightly-update

.github/workflows/cron-weekly-update-nightly.yml

@@ -0,0 +1,34 @@
+name: Update Stable rustc
+on:
+  schedule:
+    - cron: "0 0 * * 5" # runs every Friday at 00:00 (generally rust releases on Thursday)
+  workflow_dispatch: # allows manual triggering
+permissions: {}
+jobs:
+  format:
+    name: Update stable rustc
+    runs-on: ubuntu-24.04
+    permissions:
+      contents: write
+      pull-requests: write
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        with:
+          persist-credentials: false
+      - name: Install cargo-rbmt
+        run: cargo install --git https://github.com/rust-bitcoin/rust-bitcoin-maintainer-tools.git --rev $(cat rbmt-version) cargo-rbmt
+      - name: Update stable toolchain in Cargo.toml
+        run: |
+          eval "$(cargo rbmt toolchains --update-stable)"
+          echo "stable_version=$RBMT_STABLE" >> $GITHUB_ENV
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@271a8d0340265f705b14b6d32b9829c1cb33d45e # v7.0.8
+        with:
+          token: ${{ secrets.APOELSTRA_CREATE_PR_TOKEN }}
+          author: Update Stable Rustc Bot <bot@example.com>
+          committer: Update Stable Rustc Bot <bot@example.com>
+          title: Automated weekly update to rustc stable (to ${{ env.stable_version }})
+          body: |
+           Automated update to Cargo.toml workspace metadata by [create-pull-request](https://github.com/peter-evans/create-pull-request) GitHub action
+          commit-message: Automated update to rustc stable-${{ env.stable_version }}
+          branch: create-pull-request/weekly-stable-update

.github/workflows/cron-weekly-update-stable.yml

@@ -1,173 +1,120 @@
-on:   # yamllint disable-line rule:truthy
-  pull_request:
-  push:
-    branches:
-      - master
-      - 'test-ci/**'
+on: [push, pull_request]
 
-name: Continuous integration
+name: Continuous Integration
 
-jobs:
-  Prepare:
-    runs-on: ubuntu-latest
-    outputs:
-      nightly_version: ${{ steps.read_toolchain.outputs.nightly_version }}
-      msrv_version: ${{ steps.read_msrv.outputs.msrv_version }}
-    steps:
-      - name: "Checkout repo"
-        uses: actions/checkout@v4
-      - name: "Read nightly version"
-        id: read_toolchain
-        run: |
-          set -euo pipefail
-          version=$(cat nightly-version)
-          echo "nightly_version=$version" >> $GITHUB_OUTPUT
-      - name: Read MSRV from clippy.toml
-        id: read_msrv
-        run: |
-          set -euo pipefail
-          msrv=$(grep '^msrv *= *"' clippy.toml | sed -E 's/.*"([^"]+)".*/\1/')
-          echo "msrv_version=$msrv" >> "$GITHUB_OUTPUT"
-
-  Stable:
-    name: Test - stable toolchain
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-    steps:
-      - name: "Checkout repo"
-        uses: actions/checkout@v4
-      - name: "Checkout maintainer tools"
-        uses: ./.github/actions/checkout-maintainer-tools
-      - name: "Select toolchain"
-        uses: dtolnay/rust-toolchain@stable
-      - name: "Set dependencies"
-        run: cp Cargo-latest.lock Cargo.lock
-      - name: "Run test script"
-        run: ./maintainer-tools/ci/run_task.sh stable
-
-  Nightly:
-    name: Test - nightly toolchain
-    needs: Prepare
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-    steps:
-      - name: "Checkout repo"
-        uses: actions/checkout@v4
-      - name: "Checkout maintainer tools"
-        uses: ./.github/actions/checkout-maintainer-tools
-      - name: "Select toolchain"
-        uses: dtolnay/rust-toolchain@v1
-        with:
-          toolchain: ${{ needs.Prepare.outputs.nightly_version }}
-      - name: "Set dependencies"
-        run: cp Cargo-latest.lock Cargo.lock
-      - name: "Run test script"
-        run: ./maintainer-tools/ci/run_task.sh nightly
+permissions:
+  contents: read
 
-  MSRV:
-    name: Test - MSRV
-    needs: Prepare
-    runs-on: ubuntu-latest
+jobs:
+  Test: # 6 jobs: 3 toolchains × 2 lock files.
+    name: Test - ${{ matrix.toolchain }} toolchain (${{ matrix.dep }})
+    runs-on: ubuntu-24.04
     strategy:
       fail-fast: false
+      matrix:
+        dep: [recent]
+        toolchain: [stable, nightly, msrv]
     steps:
-      - name: "Checkout repo"
+      - name: Checkout repo
         uses: actions/checkout@v4
-      - name: "Checkout maintainer tools"
-        uses: ./.github/actions/checkout-maintainer-tools
-      - name: "Select toolchain"
-        uses: dtolnay/rust-toolchain@stable
-        with:
-          toolchain: ${{ needs.Prepare.outputs.msrv_version }}
-      - name: "Set dependencies"
-        run: cp Cargo-latest.lock Cargo.lock
-      - name: "Run test script"
-        run: ./maintainer-tools/ci/run_task.sh msrv
+      - uses: rust-bitcoin/rust-bitcoin-maintainer-tools/.github/actions/setup-rbmt@af3c2868415b17eedc808da6d0589e10b7482660 # v0.1.0
+      - uses: Swatinem/rust-cache@v2
+      - name: Run ${{ matrix.toolchain }} tests
+        run: |
+          export ELEMENTSD_EXE="$PWD/elementsd-tests/bin/elementsd"
+          if [ "${{ matrix.toolchain }}" = "msrv" ]; then
+            MSRV="$(cargo rbmt toolchains --msrv)"
+            cp "Cargo-${{ matrix.dep }}.lock" Cargo.lock
+            cargo +"$MSRV" test --locked
+          else
+            cargo rbmt --lock-file ${{ matrix.dep }} test --toolchain ${{ matrix.toolchain }}
+          fi
 
   Lint:
     name: Lint - nightly toolchain
-    needs: Prepare
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        dep: [recent]
+    runs-on: ubuntu-24.04
     steps:
-      - name: "Checkout repo"
+      - name: Checkout Crate
         uses: actions/checkout@v4
-      - name: "Checkout maintainer tools"
-        uses: ./.github/actions/checkout-maintainer-tools
-      - name: "Select toolchain"
-        uses: dtolnay/rust-toolchain@v1
-        with:
-          toolchain: ${{ needs.Prepare.outputs.nightly_version }}
-      - name: Install clippy
-        run: rustup component add clippy
-      - name: "Set dependencies"
-        run: cp Cargo-latest.lock Cargo.lock
-      - name: "Run test script"
-        run: ./maintainer-tools/ci/run_task.sh lint
+      - uses: rust-bitcoin/rust-bitcoin-maintainer-tools/.github/actions/setup-rbmt@af3c2868415b17eedc808da6d0589e10b7482660 # v0.1.0
+      - uses: Swatinem/rust-cache@v2
+      - name: Run lints
+        run: cargo rbmt --lock-file recent lint
 
   Docs:
     name: Docs - stable toolchain
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        dep: [recent]
+    runs-on: ubuntu-24.04
     steps:
-      - name: "Checkout repo"
+      - name: Checkout Crate
         uses: actions/checkout@v4
-      - name: "Checkout maintainer tools"
-        uses: ./.github/actions/checkout-maintainer-tools
-      - name: "Select toolchain"
-        uses: dtolnay/rust-toolchain@stable
-      - name: "Set dependencies"
-        run: cp Cargo-latest.lock Cargo.lock
-      - name: "Run test script"
-        run: ./maintainer-tools/ci/run_task.sh docs
+      - uses: rust-bitcoin/rust-bitcoin-maintainer-tools/.github/actions/setup-rbmt@af3c2868415b17eedc808da6d0589e10b7482660 # v0.1.0
+      - uses: Swatinem/rust-cache@v2
+      - name: Run doc tests
+        run: cargo rbmt --lock-file recent docs
 
   Docsrs:
     name: Docs - nightly toolchain
-    needs: Prepare
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        dep: [recent]
+    runs-on: ubuntu-24.04
     steps:
-      - name: "Checkout repo"
+      - name: Checkout Crate
         uses: actions/checkout@v4
-      - name: "Checkout maintainer tools"
-        uses: ./.github/actions/checkout-maintainer-tools
-      - name: "Select toolchain"
-        uses: dtolnay/rust-toolchain@v1
-        with:
-          toolchain: ${{ needs.Prepare.outputs.nightly_version }}
-      - name: "Set dependencies"
-        run: cp Cargo-latest.lock Cargo.lock
-      - name: "Run test script"
-        run: ./maintainer-tools/ci/run_task.sh docsrs
+      - uses: rust-bitcoin/rust-bitcoin-maintainer-tools/.github/actions/setup-rbmt@af3c2868415b17eedc808da6d0589e10b7482660 # v0.1.0
+      - uses: Swatinem/rust-cache@v2
+      - name: Run docsrs tests
+        run: cargo rbmt --lock-file recent docsrs
 
-#  Format:
+#  Format: # 1 job, run cargo fmt directly.
 #    name: Format - nightly toolchain
-#    needs: Prepare
-#    runs-on: ubuntu-latest
-#    strategy:
-#      fail-fast: false
+#    runs-on: ubuntu-24.04
 #    steps:
-#      - name: "Checkout repo"
+#      - name: Checkout Crate
 #        uses: actions/checkout@v4
-#      - name: "Select toolchain"
-#        uses: dtolnay/rust-toolchain@v1
-#        with:
-#          toolchain: ${{ needs.Prepare.outputs.nightly_version }}
-#      - name: "Install rustfmt"
-#        run: rustup component add rustfmt
-#      - name: "Check formatting"
-#        run: cargo fmt --all -- --check
+#      - uses: rust-bitcoin/rust-bitcoin-maintainer-tools/.github/actions/setup-rbmt@af3c2868415b17eedc808da6d0589e10b7482660 # v0.1.0
+#      - name: Check formatting
+#        run: cargo rbmt --lock-file recent fmt --check
+
+  Bench:
+    name: Bench - nightly toolchain
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Checkout Crate
+        uses: actions/checkout@v4
+      - uses: rust-bitcoin/rust-bitcoin-maintainer-tools/.github/actions/setup-rbmt@af3c2868415b17eedc808da6d0589e10b7482660 # v0.1.0
+      - uses: Swatinem/rust-cache@v2
+      - name: Run benches
+        run: cargo rbmt --lock-file recent bench
+
+  Arch32bit:
+    name: Test 32-bit version
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Checkout Crate
+        uses: actions/checkout@v4
+      - name: Checkout Toolchain
+        uses: dtolnay/rust-toolchain@stable
+      - name: Add architecture i386
+        run: sudo dpkg --add-architecture i386
+      - name: Install i686 gcc
+        run: sudo apt-get update -y && sudo apt-get install -y gcc-multilib
+      - name: Install target
+        run: rustup target add i686-unknown-linux-gnu
+      - name: Run tests on i686
+        run: cargo test --target i686-unknown-linux-gnu
+
+  Cross:
+    name: Cross test
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Checkout Crate
+        uses: actions/checkout@v4
+      - name: Checkout Toolchain
+        uses: dtolnay/rust-toolchain@stable
+      - name: Install target
+        run: rustup target add s390x-unknown-linux-gnu
+      - name: install cross
+        run: cargo install cross --locked
+      - name: run cross test
+        run: cross test --target s390x-unknown-linux-gnu
 
   Wasm:
     name: Check WASM