chore: Support recreating PRs with simple comments (#48)

* new workflow

* diff

* bash shell

* cancel in progress

* add log

* remove it flag

* sed help

* gha safe

* go back one commit to test

* config

* small name change

* further simplification

* create output

* generation

* base

* generation flow

* improvement

* another improvement

* generation improvements

* remove pr trigger

* generate slates too

* recreate on recreate

.github/workflows/generate.yml

@@ -2,6 +2,15 @@ name: generate
 
 on:
   workflow_dispatch:
+  workflow_call:
+    inputs:
+      pr-base:
+        required: true
+        type: string
+    outputs:
+      pr-number:
+        description: pr number
+        value: ${{ jobs.generate.outputs.pr-number }}
 
 permissions:
   actions: read
@@ -20,6 +29,8 @@ jobs:
 
   generate:
     runs-on: ubuntu-latest
+    outputs:
+      pr-number: ${{ steps.create-pr.outputs.pull-request-number }}
     steps:
 
       - uses: actions/checkout@v4
@@ -29,14 +40,18 @@ jobs:
       - name: Determine base branch name
         id: pr-base
         run: |
-          echo "name=${{ github.ref_name }}" | tee -a "$GITHUB_OUTPUT"
+          if [[ "${{ github.event_name }}" = "issue_comment" ]]; then
+            echo "name=${{ inputs.pr-base }}" | tee -a "$GITHUB_OUTPUT"
+          else
+            echo "name=${{ github.ref_name }}" | tee -a "$GITHUB_OUTPUT"
+          fi
 
       - name: Determine head branch name
         id: pr-head
         env:
           BASE: ${{ steps.pr-base.outputs.name }}
         run: |
-          DATE=$(date '+%Y-%m-%d')
+          DATE=$(date '+%s')
           echo "name=gen/$BASE/$DATE" | tee -a "$GITHUB_OUTPUT"
 
       - name: Re-generate isp
@@ -61,6 +76,7 @@ jobs:
           fi
         
       - name: Create Pull Request
+        id: create-pr
         if: steps.changes.outputs.should-commit == 'true'
         uses: peter-evans/create-pull-request@v6
         with:

.github/workflows/pr-comment-handler.yml

@@ -0,0 +1,59 @@
+name: pr-comment-handler
+
+on:
+  issue_comment:
+    types: [created, edited]
+
+permissions:
+  contents: write
+  pull-requests: write
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+
+  handle-comment:
+    runs-on: ubuntu-latest
+    if: ${{ github.event.issue.pull_request && contains(github.event.comment.body, 'recreate-me') }}
+    outputs:
+      pr-head: ${{ steps.pr-details.outputs.head }}
+    steps:
+
+      - uses: actions/checkout@v4
+
+      - name: Determine PR details
+        id: pr-details
+        run: |
+          details=$(gh pr view ${{ github.event.issue.number }} --json 'baseRefName,headRefName' 2>&1)
+
+          headRefName=$(printf '%s' "$details" | jq -rc '.headRefName')
+          baseRefName=$(printf '%s' "$details" | jq -rc '.baseRefName')
+          if [[ "$headRefName" = "null" ]] || [[ "$baseRefName" = "null" ]]; then
+            echo "::error::Failed to parse pr details"
+            echo "$details"
+            exit 1
+          fi
+
+          echo "head=$headRefName" | tee -a "$GITHUB_OUTPUT"
+          echo "base=$baseRefName" | tee -a "$GITHUB_OUTPUT"
+
+  create-new:
+    needs: [handle-comment]
+    uses: ./.github/workflows/generate.yml
+    with:
+      pr-base: ${{ needs.handle-comment.outputs.pr-head }}
+    secrets: inherit
+
+  close-old:
+    needs: [handle-comment, create-new]
+    runs-on: ubuntu-latest
+    steps:
+
+      - uses: actions/checkout@v4
+
+      - name: Close old PR
+        run: |
+          gh pr close ${{ github.event.issue.number }} \
+            -c "Re-created as #${{ needs.create-new.outputs.pr-number }}"