Fixed release note logic

.github/release_notes.template

@@ -0,0 +1,14 @@
+# {version}
+
+This crate provides a set of functions to facilitate compiling flatbuffers to Rust from within
+Rust. This is particularly helpful for use in `build.rs` scripts. Please note that for
+compatiblity this crate will only support a single version of the `flatc` compiler. Please
+check what version that is against whatever version is installed on your system.That said, due
+to flatbuffers' versioning policy, it could be ok to mix patch and even minor versions.
+
+Please read our [`README`](https://github.com/rdelfin/flatbuffers-build/blob/main/README.md) or
+our [Rust docs](https://docs.rs/flatbuffers-build/latest/flatbuffers-build/) for more details on
+how to use this crate.
+
+Changelog:
+

.github/workflows/release.yaml

@@ -53,6 +53,7 @@ jobs:
       version: ${{ steps.check_version.outputs.version }}
       tag: ${{ steps.check_version.outputs.tag }}
       commit: ${{ steps.check_version.outputs.commit }}
+      previous_version: ${{ steps.bump_version.outputs.previous_version }}
     steps:
       - uses: actions/checkout@v3
       - run: |
@@ -64,7 +65,11 @@ jobs:
           echo "PWD: ${PWD}" && ls && pip3 install -r requirements.txt
 
       - name: Bump appropriate version
-        run: python3 new_version.py ${{ inputs.bumpLevel }}
+        id: bump_version
+        run: |
+          PREVIOUS_VERSION=$(tq -f Cargo.toml .package.version | sed 's/^.\(.*\).$/\1/')
+          echo "previous_version=${PREVIOUS_VERSION}" >> $GITHUB_OUTPUT
+          python3 new_version.py ${{ inputs.bumpLevel }}
 
       - name: Show diff
         run: git diff
@@ -93,7 +98,8 @@ jobs:
 
       - name: Commit version
         run: |
-          git commit -am "${{ inputs.bumpLevel }} version bump"
+          VERSION=$(tq -f Cargo.toml .package.version | sed 's/^.\(.*\).$/\1/')
+          git commit -am "release version ${VERSION}"
 
       - name: Push new version
         run: |
@@ -124,11 +130,21 @@ jobs:
         with:
           ref: ${{ needs.bump_version.outputs.commit }}
 
+      - name: Generate changelog
+        id: github_changelog
+        uses: mikepenz/release-changelog-builder-action@v4
+        outputFile: ${{ github.workspace }}/.github/changelog.txt
+        fromTag: v${{ needs.bump_version.outputs.previous_version }}
+        toTag: ${{ needs.bump_version.outputs.commit }}
+        env:
+          GITHUB_TOKEN: ${{ secretes.GITHUB_TOKEN }}
+
       - name: Generate release notes
         run: |
           # Generate the release notes
-          sed 's/{version}/${{ env.VERSION }}/g' ${{ github.workspace }}/.github/release_notes.template \
-          > ${{ github.workspace }}/.github/release_notes.txt
+          cat ${{ github.workspace }}/.github/release_notes.template ${{ github.workspace }}/.github/changelog.txt \
+            | sed 's/{version}/${{ env.VERSION }}/g' \
+            > ${{ github.workspace }}/.github/release_notes.txt
         env:
           VERSION: ${{ needs.bump_version.outputs.version }}