misc: commonize "Show Results" artifact-size-metrics step

.github/actions/artifact-size-metrics/show-results/action.yml

@@ -0,0 +1,76 @@
+name: Artifact Size Metrics - Show Results
+description: Posts a new artifact analysis comment on the PR
+
+runs:
+  using: "composite"
+  steps:
+    - name: Post Artifact Analysis Comment
+      uses: actions/github-script@v7
+      with:
+        script: |
+          const fs = require('node:fs')
+          const prNumber = context.issue.number ?? process.env.SDK_PR
+
+          const prInfo = await github.rest.pulls.get({
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            pull_number: prNumber
+          })
+
+          const hasAcknowledgeLabel = prInfo.data.labels.some(label => label.name === 'acknowledge-artifact-size-increase')
+
+          const getComments = `
+            query { 
+              repository(owner:"${context.repo.owner}", name:"${context.repo.repo}"){
+                pullRequest(number: ${prNumber}) {
+                  id
+                  comments(last:100) {
+                    nodes {
+                      id
+                      body
+                      author {
+                        login
+                      }
+                      isMinimized
+                    }
+                  }
+                }
+              }`
+
+          const response = await github.graphql(getComments)
+          const comments = response.repository.pullRequest.comments.nodes
+
+          // Minimize outdated artifact-size comments
+          const mutations = comments
+            .filter(comment => comment.author.login == 'github-actions' && !comment.isMinimized && comment.body.startsWith('Affected Artifacts'))
+            .map(comment =>
+              github.graphql(`mutation {
+                minimizeComment(input:{subjectId:"${comment.id}", classifier:OUTDATED}){
+                  clientMutationId
+                }
+              }`)
+            )
+          await Promise.all(mutations)
+
+          const comment = fs.readFileSync('build/reports/metrics/artifact-analysis.md', 'utf8')
+
+          // Create a new comment with the latest artifact analysis
+          const writeComment = `mutation {
+            addComment(input:{body:"""${comment}""", subjectId:"${response.repository.pullRequest.id}"}){
+              commentEdge {
+                node {
+                  id
+                }
+              }
+            }}`
+          const addCommentResponse = await github.graphql(writeComment)
+          const newCommentId = addCommentResponse.addComment.commentEdge.node.id
+
+          // Minimize the newly-created comment if artifact size increase is acknowledged
+          if (hasAcknowledgeLabel) {
+            await github.graphql(`mutation {
+              minimizeComment(input:{subjectId:"${newCommentId}", classifier:RESOLVED}){
+                clientMutationId
+              }
+            }`)
+          }