Add canary releases

Signed-off-by: Ryan Levick <ryan.levick@fermyon.com>

Author: rylev

.github/workflows/release.yaml

@@ -1,6 +1,8 @@
 name: Release
 on:
   push:
+    branches:
+      - main
     tags:
       - "v*"
   workflow_dispatch:
@@ -182,19 +184,19 @@ jobs:
           cd _dist
           tar czf py2wasm-${{ env.RELEASE_VERSION }}-${{ env.RUNNER_OS }}-${{ matrix.config.arch }}.tar.gz py2wasm.license py2wasm${{ matrix.config.extension }}
 
+      # Upload the build artifact so that we can later access it in the checksums job
       - name: Upload build artifact
         uses: actions/upload-artifact@v3
         with:
             name: py2wasm-${{ env.RELEASE_VERSION }}-${{ env.RUNNER_OS }}-${{ matrix.config.arch }}.tar.gz
             path: _dist/py2wasm-${{ env.RELEASE_VERSION }}-${{ env.RUNNER_OS }}-${{ matrix.config.arch }}.tar.gz
 
       - name: upload binary to Github release
-        if: startsWith(github.ref, 'refs/tags/v')
         uses: svenstaro/upload-release-action@v2
         with:
           repo_token: ${{ secrets.GITHUB_TOKEN }}
           file: _dist/py2wasm-${{ env.RELEASE_VERSION }}-${{ env.RUNNER_OS }}-${{ matrix.config.arch }}.tar.gz
-          tag: ${{ github.ref }}
+          tag: ${{ env.RELEASE_VERSION }}
 
   checksums:
     name: generate checksums
@@ -203,22 +205,19 @@ jobs:
     steps:
 
       - name: set the release version (tag)
-        if: startsWith(github.ref, 'refs/tags/v')
         shell: bash
         run: echo "RELEASE_VERSION=${GITHUB_REF/refs\/tags\//}" >> $GITHUB_ENV
 
       - name: download release assets
         uses: actions/download-artifact@v3
 
       - name: generate checksums
-        run: |
-          ls -lh
-          sha256sum py2wasm*.tar.gz/py2wasm*.tar.gz > checksums-${{ env.RELEASE_VERSION }}.txt
+        run: sha256sum py2wasm*.tar.gz/py2wasm*.tar.gz > checksums-${{ env.RELEASE_VERSION }}.txt
 
       - name: upload checksums to Github release
-        if: startsWith(github.ref, 'refs/tags/v')
         uses: svenstaro/upload-release-action@v2
         with:
           repo_token: ${{ secrets.GITHUB_TOKEN }}
           file: checksums-${{ env.RELEASE_VERSION }}.txt
-          tag: ${{ github.ref }}
+          tag: ${{ env.RELEASE_VERSION }}
+