chore(CI): Add unused dependencies check

.cargo/config.toml

@@ -15,6 +15,8 @@ ci-clippy-external = [
   "-Dwarnings",
 ]
 ci-license = "license-template --template .license_template"
+ci-udeps = "udeps --all-targets --backend=depinfo"
+ci-udeps-external = "udeps --all-targets --manifest-path external-crates/move/Cargo.toml --backend=depinfo"
 
 [build]
 rustflags = ["-C", "force-frame-pointers=yes", "-C", "force-unwind-tables=yes"]

.github/workflows/external.yml

@@ -86,6 +86,21 @@ jobs:
           -p ${{matrix.components}}
           --profile ci
 
+  check-unused-deps:
+    name: Check Unused Dependencies of ${{ matrix.components }} (${{ matrix.flags }})
+    strategy:
+      matrix:
+        components: ${{ fromJson(needs.changes.outputs.components) }}
+        flags: ["--all-features", "--no-default-features"]
+      fail-fast: false
+    runs-on: [self-hosted]
+    needs: changes
+
+    steps:
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # Pin v4.1.1
+      - name: Run Cargo Udeps
+        run: cargo +nightly ci-udeps-external -p ${{matrix.components}} ${{ matrix.flags }}
+
   clippy:
     needs: diff
     if: needs.diff.outputs.isRust == 'true'

.github/workflows/rust.yml

@@ -101,6 +101,38 @@ jobs:
         # (we have the stardust iota-sdk package as a dependency)
         run: cargo nextest run --profile ci -E 'rdeps(iota-sdk)' -p [email protected]
 
+  check-unused-deps:
+    name: Check Unused Dependencies of ${{ matrix.components }} (${{ matrix.flags }})
+    strategy:
+      matrix:
+        components: ${{ fromJson(needs.changes.outputs.components) }}
+        flags: ["--all-features", "--no-default-features"]
+      fail-fast: false
+    runs-on: [self-hosted]
+    needs: changes
+
+    steps:
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # Pin v4.1.1
+      - name: Run Cargo Udeps
+        run: cargo +nightly ci-udeps -p ${{matrix.components}} ${{ matrix.flags }}
+
+  check-unused-deps-iota-sdk:
+    name: Check Unused Dependencies of iota-sdk (${{ matrix.flags }})
+    if: needs.iota-sdk-changes.outputs.iota-sdk == 'true'
+    runs-on: [self-hosted]
+    needs: iota-sdk-changes
+    strategy:
+      matrix:
+        flags: ["--all-features", "--no-default-features"]
+
+    steps:
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # Pin v4.1.1
+      # iota-sdk version needs to be explicitly defined here due to this bug
+      # https://github.com/rust-lang/cargo/issues/12891
+      # (we have the stardust iota-sdk package as a dependency)
+      - name: Run Cargo Udeps
+        run: cargo +nightly ci-udeps -p [email protected] ${{ matrix.flags }}
+
   diff:
     runs-on: [self-hosted]
     outputs: