Add crates.io publish composite action

Author: jpraynaud

.github/workflows/actions/publish-crate-package/action.yml

@@ -0,0 +1,53 @@
+name: publish-crate-package
+description: |
+  Deploy the crate package to crates.io
+inputs:
+  dry_run:
+    description: Dry run will not publish to crates.io, just test it.
+    required: true
+  package:
+    description: crate package name.
+    required: true
+  api_token: 
+    description: crates.io API token.
+    required: false
+
+runs:
+  using: "composite"
+  steps:
+  - name: Check crate latest version
+    id: check_version
+    shell: bash
+    run: |
+      echo "Check crate latest published version for '${{ inputs.package}}' package"
+      LATEST_REMOTE_VERSION=$(curl -sL https://crates.io/api/v1/crates/${{ inputs.package}} | jq -r '.crate.newest_version')
+      LOCAL_VERSION=$(cargo metadata --quiet --no-deps | jq -r '.packages[] | select(.name=="${{ inputs.package}}") | .version')
+      echo "Latest crate.io version: $LATEST_REMOTE_VERSION"
+      echo "Local version: $LOCAL_VERSION"
+
+      if [ "$LOCAL_VERSION" != "$LATEST_REMOTE_VERSION" ]; then 
+        echo "Local version is newer than remote version: we will publish to crates.io"
+        echo "should_deploy=true" >> $GITHUB_OUTPUT
+      else
+        echo "Local version and remote version are the same: no need to publish to crates.io"
+        echo "should_deploy=false" >> $GITHUB_OUTPUT
+      fi
+
+  - name: Cargo publish dry run
+    shell: bash
+    run: |
+      echo "Cargo publish '${{ inputs.package}}' package (dry run)"
+      cargo publish -p ${{ inputs.package}} --dry-run --no-verify
+
+  - name: Cargo package list
+    shell: bash
+    run: |
+      echo "Cargo package list '${{ inputs.package}}' package"
+      cargo package -p ${{ inputs.package}} --list
+
+  - name: Cargo publish
+    if: inputs.dry_run == 'false' && steps.check_version.outputs.should_deploy == 'true'
+    shell: bash
+    run: |
+      echo "Cargo publish '${{ inputs.package}}' package"
+      cargo publish -p ${{ inputs.package}} --token ${{ inputs.api_token }} --no-verify