Print link to test-version zip in PR discussions

.github/workflows/build.yml

@@ -1,6 +1,8 @@
 name: Build
 
-on: push
+on:
+  push:
+  pull_request:
 
 jobs:
   build:
@@ -41,7 +43,14 @@ jobs:
         mkdir tmp
         unzip felt.${{ env.VERSION }}.zip -d tmp
 
+    - name: Save PR number to zips
+      run: |
+        cd tmp
+        echo ${{ github.event.number }} | tee pr_number
+        echo ${{ github.event.pull_request.head.sha }} | tee git_commit
+        echo ${{ github.event.number }}
+
     - uses: actions/upload-artifact@v2
       with:
-        name: felt_plugin.${{ env.VERSION }}.${{ env.SHA_SHORT }}
+        name: felt_plugin.${{ env.VERSION }}
         path: tmp

.github/workflows/build_artifact_comment.yml

@@ -0,0 +1,104 @@
+name: Write build artifact comments
+
+on:
+  workflow_run:
+    workflows: ["Build"]
+    types:
+      - completed
+
+permissions:
+  contents: read
+
+jobs:
+  on-success:
+
+    permissions:
+      pull-requests: write
+
+    runs-on: ubuntu-latest
+    steps:
+      - name: Get source code
+        uses: actions/checkout@v4
+        with:
+          # To fetch tags
+          fetch-depth: 0
+
+      - name: 'Set plugin version environment variables'
+        run: |
+          TAG=$(git describe --tags $(git rev-list --tags --max-count=1))
+          echo "VERSION=$(echo ${TAG} | awk -F. -v OFS=. 'NF==1{print ++$NF}; NF>1{if(length($NF+1)>length($NF))$(NF-1)++; $NF=sprintf("%0*d", length($NF), ($NF+1)%(10^length($NF))); print}')-alpha" >> $GITHUB_ENV
+          echo "SHA_SHORT=$(git rev-parse --short HEAD)" >> $GITHUB_ENV
+      - name: 'Download artifact'
+        id: download_artifact
+        uses: actions/github-script@v7
+        with:
+          script: |
+            let allArtifacts = await github.rest.actions.listWorkflowRunArtifacts({
+               owner: context.repo.owner,
+               repo: context.repo.repo,
+               run_id: context.payload.workflow_run.id,
+            });
+            let matchArtifacts = allArtifacts.data.artifacts.filter((artifact) => {
+              return artifact.name == 'felt_plugin.${{ env.VERSION }}'
+            });
+            matchArtifacts.forEach((artifact) => {
+            });
+            if (matchArtifacts.length>0)
+            {
+              let download = await github.rest.actions.downloadArtifact({
+                 owner: context.repo.owner,
+                 repo: context.repo.repo,
+                 artifact_id: matchArtifacts[0].id,
+                 archive_format: 'zip',
+              });
+              let fs = require('fs');
+              fs.writeFileSync(`${process.env.GITHUB_WORKSPACE}/felt_plugin.${{ env.VERSION }}.zip`, Buffer.from(download.data));
+              core.setOutput('artifact_id', matchArtifacts[0].id);
+            }
+            else
+            {
+              core.setOutput('artifact_id', 0);
+            }
+
+      - name: 'Unzip artifact'
+        if: fromJSON(steps.download_artifact.outputs.artifact_id) > 0
+        run: |
+          unzip -n felt_plugin.${{ env.VERSION }}
+
+      - name: 'Post artifact download link as comment on PR'
+        if: fromJSON(steps.download_artifact.outputs.artifact_id) > 0
+        uses: actions/github-script@v7
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          script: |
+            let fs = require('fs');
+            let issue_number = Number(fs.readFileSync('./pr_number'));
+            let git_sha = String(fs.readFileSync('./git_commit')).trim();
+            const prComments = await github.rest.issues.listComments({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: issue_number,
+            });
+            const PREFIX = "## Plugin ready!";
+            let body = PREFIX + "\n\n" +
+                "A test version of this PR is available for testing [here](https://github.com/" + context.repo.owner + "/" + context.repo.repo + "/suites/" +  context.payload.workflow_run.check_suite_id + "/artifacts/${{steps.download_artifact.outputs.artifact_id}}).";
+            body += "\n\n*(Built from commit " + git_sha + ")*";
+
+            const winBuildComment = prComments.data?.find(c => c.body.startsWith(PREFIX));
+            if (!!winBuildComment) {
+              // update the existing comment
+              await github.rest.issues.updateComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                comment_id: winBuildComment.id,
+                body: body
+              });
+            } else {
+              // submit a new comment
+              await github.rest.issues.createComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: issue_number,
+                body: body
+              });
+            }