Add ability to pass output to another step

Fixes jakejarvis#16

.github/workflows/test.yml

@@ -12,6 +12,20 @@ jobs:
       uses: ./
       with:
         url: 'https://github.com/'
+      id: lighthouse
+    - name: Comment output on PR
+      if: github.event_name == 'pull_request'
+      uses: unsplash/comment-on-pr@master
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      with:
+        msg: "Here is your Lighthouse score:\n
+        \n
+        Performance: ${{ steps.lighthouse.outputs.performance }}\n
+        Accessibility: ${{ steps.lighthouse.outputs.accessibility }}\n
+        Best Practices: ${{ steps.lighthouse.outputs.practices }}\n
+        SEO: ${{ steps.lighthouse.outputs.seo }}\n
+        PWA: ${{ steps.lighthouse.outputs.pwa }}\n"
     - uses: actions/upload-artifact@master
       with:
         name: report

README.md

@@ -65,6 +65,28 @@ jobs:
 
 On pull requests, the PR number will be extracted from the GitHub event data and used to generate the deploy preview URL as follows: `https://deploy-preview-[[PR_NUMBER]]--[[NETLIFY_SITE]].netlify.com`. You can combine the two above examples and include both `url` and `netlify_site` and run on `on: [push, pull_request]` and the appropriate URL will be automatically selected depending on the type of event.
 
+### Comment output on PR
+
+Extends the previous 
+
+```yaml
+...
+jobs:
+  audit:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Audit live URL
+      uses: jakejarvis/lighthouse-action@master
+      with:
+        url: 'https://jarv.is/'
+      id: lighthouse
+    - name: Comment output on PR
+        uses: unsplash/comment-on-pr@master
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          msg: "Performance: ${{ steps.lighthouse.outputs.performance }}"
+```
 
 ## To-Do
 

entrypoint.sh

@@ -48,4 +48,11 @@ printf "* Detailed results are saved here, use https://github.com/actions/upload
 printf "    %s\n" "$OUTPUT_PATH.report.html"
 printf "    %s\n" "$OUTPUT_PATH.report.json"
 
+# Print scores, so they can be used in another action step.
+echo "##[set-output name=performance;]$(echo "$SCORE_PERFORMANCE*100" | bc -l)"
+echo "##[set-output name=accessibility;]$(echo "$SCORE_ACCESSIBILITY*100" | bc -l)"
+echo "##[set-output name=practices;]$(echo "$SCORE_PRACTICES*100" | bc -l)"
+echo "##[set-output name=seo;]$(echo "$SCORE_SEO*100" | bc -l)"
+echo "##[set-output name=pwa;]$(echo "$SCORE_PWA*100" | bc -l)"
+
 exit 0