try rust version matrix

.github/workflows/rust-versions.yaml

@@ -1,70 +1,16 @@
+# testing future versions of rust
 name: rust-versions
 on:
   push:
-    tags: # only on releases, not RC, since we've tested already
-      - "[0-9]+.[0-9]+.[0-9]+"
-    branches: ["**"] # glob pattern to allow slash /
-  pull_request:
-    types:
-      - opened
-      - synchronize
-    branches:
-      - "release**"
-      - "main**"
+    branches: ["ci-bins*"] # glob pattern to allow slash /
   schedule:
     - cron: "30 00 * * *"
 
-# TODO: use ci run matrix options
-
 jobs:
-  builds-stable:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-
-      - name: setup env
-        uses: ./.github/actions/build_env
-
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: stable
-          override: true
-      - name: install rustfmt clippy
-        shell: bash
-        run: rustup component add rustfmt clippy
-
-      - name: clippy
-        uses: actions-rs/cargo@v1
-        with:
-          command: clippy
-          args: --workspace --tests -- -D warnings
-
-  builds-beta:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-
-      - name: setup env
-        uses: ./.github/actions/build_env
-
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: beta
-          override: true
-
-      - name: install rustfmt clippy
-        shell: bash
-        run: rustup component add rustfmt clippy
-
-      - name: clippy
-        uses: actions-rs/cargo@v1
-        with:
-          command: clippy
-          args: --workspace --tests -- -D warnings
-
-  builds-nightly:
+  builds:
+    strategy:
+      matrix:
+        channel: ["stable", "beta", "nightly"]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
@@ -75,15 +21,8 @@ jobs:
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: nightly
+          toolchain: ${{matrix.channel}}
           override: true
 
-      - name: install rustfmt clippy
-        shell: bash
-        run: rustup component add rustfmt clippy
-
-      - name: clippy
-        uses: actions-rs/cargo@v1
-        with:
-          command: clippy
-          args: --workspace --tests -- -D warnings
+      - name: debug build
+        run: cargo b -p libra