chore: Speed up CI by caching Sampo + some fixes

.github/workflows/release.yml

@@ -4,6 +4,7 @@ on:
   pull_request:
     types: [closed]
     branches: [master]
+  workflow_dispatch:
 
 permissions:
   contents: read
@@ -20,8 +21,10 @@ jobs:
     runs-on: ubuntu-latest
     # Run when PR with 'release' label is merged to master
     if: |
-      github.event.pull_request.merged == true
-       && contains(github.event.pull_request.labels.*.name, 'release')
+      github.event_name == 'workflow_dispatch' ||
+       (github.event_name == 'pull_request' &&
+        github.event.pull_request.merged == true &&
+        contains(github.event.pull_request.labels.*.name, 'release'))
     outputs:
       should-release: ${{ steps.check.outputs.should-release }}
     steps:
@@ -31,21 +34,13 @@ jobs:
           ref: master
           fetch-depth: 0
 
-      - name: Install Rust
-        uses: dtolnay/rust-toolchain@0b1efabc08b657293548b77fb76cc02d26091c7e
-        with:
-          toolchain: 1.91.1
-          components: cargo
-
-      - name: Install Sampo CLI
-        run: cargo install sampo
-
       - name: Check release conditions
         id: check
         run: |
-          if sampo release --dry-run; then
+          changeset_count=$(find .sampo/changesets -name '*.md' 2>/dev/null | wc -l)
+          if [ "$changeset_count" -gt 0 ]; then
             echo "should-release=true" >> "$GITHUB_OUTPUT"
-            echo "Changesets found, ready to release"
+            echo "Found $changeset_count changeset(s), ready to release"
           else
             echo "should-release=false" >> "$GITHUB_OUTPUT"
             echo "No changesets to release"
@@ -109,10 +104,18 @@ jobs:
       - name: Install Rust
         uses: dtolnay/rust-toolchain@0b1efabc08b657293548b77fb76cc02d26091c7e
         with:
-            toolchain: 1.91.1
-            components: cargo
+          toolchain: 1.91.1
+          components: cargo
+
+      - name: Cache Sampo CLI
+        id: cache-sampo
+        uses: actions/cache@v3
+        with:
+          path: ~/.cargo/bin/sampo
+          key: sampo-${{ runner.os }}-${{ runner.arch }}
 
       - name: Install Sampo CLI
+        if: steps.cache-sampo.outputs.cache-hit != 'true'
         run: cargo install sampo
 
       - name: Install Hex dependencies
@@ -161,6 +164,12 @@ jobs:
         if: steps.commit-release.outputs.committed == 'true'
         run: git push origin --tags
 
+      - name: Create GitHub Release
+        if: steps.commit-release.outputs.committed == 'true'
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: gh release create "v${{ steps.sampo-release.outputs.new_version }}" --generate-notes
+
       # Notify in case of a failure
       - name: Send failure event to PostHog
         if: ${{ failure() }}

.sampo/config.toml

@@ -3,6 +3,7 @@ version = 1
 
 [git]
 default_branch = "master"
+short_tags = "posthog"    # Tag with v1.2.3 rather than posthog-v1.2.3
 
 [github]
 repository = "posthog/posthog-elixir"