Add workflow to auto-update .swift-version (#111)

Not yet complete workflow which automatically updates the `.swift-version` file in this repo.

Author: rauhul

.github/actions/install-swift/action.yml

@@ -16,8 +16,6 @@ runs:
     - name: Install Swiftly
       shell: bash
       run: |
-        UNAME=$(uname -m)
-
         export SWIFTLY_HOME_DIR="$HOME/.local/share/swiftly"
         echo "SWIFTLY_HOME_DIR=$SWIFTLY_HOME_DIR" >> $GITHUB_ENV
         echo "SWIFTLY_HOME_DIR=$SWIFTLY_HOME_DIR" >> $HOME/.bashrc
@@ -26,6 +24,7 @@ runs:
         echo "SWIFTLY_BIN_DIR=$SWIFTLY_BIN_DIR" >> $GITHUB_ENV
         echo "SWIFTLY_BIN_DIR=$SWIFTLY_BIN_DIR" >> $HOME/.bashrc
 
+        UNAME=$(uname -m)
         curl -O "https://download.swift.org/swiftly/linux/swiftly-$UNAME.tar.gz"
         tar zxf "swiftly-$UNAME.tar.gz"
         ./swiftly init \

.github/workflows/build-esp.yml

@@ -4,9 +4,7 @@ on:
   push:
     branches: ["main"]
   pull_request:
-    types: [opened, reopened, synchronize]
-  repository_dispatch:
-    types: [create-pull-request]
+    types: [opened, reopened, synchronize, ready_for_review]
 
 jobs:
   build-esp:

.github/workflows/build-nuttx.yml

@@ -4,9 +4,7 @@ on:
   push:
     branches: ["main"]
   pull_request:
-    types: [opened, reopened, synchronize]
-  repository_dispatch:
-    types: [create-pull-request]
+    types: [opened, reopened, synchronize, ready_for_review]
 
 jobs:
   build-nuttx:

.github/workflows/build-pico-sdk.yml

@@ -4,9 +4,7 @@ on:
   push:
     branches: ["main"]
   pull_request:
-    types: [opened, reopened, synchronize]
-  repository_dispatch:
-    types: [create-pull-request]
+    types: [opened, reopened, synchronize, ready_for_review]
 
 jobs:
   build-pico-sdk:

.github/workflows/build-rpi-baremetal.yml

@@ -4,9 +4,7 @@ on:
   push:
     branches: ["main"]
   pull_request:
-    types: [opened, reopened, synchronize]
-  repository_dispatch:
-    types: [create-pull-request]
+    types: [opened, reopened, synchronize, ready_for_review]
 
 jobs:
   build-rpi-baremetal:

.github/workflows/build-stm.yml

@@ -4,9 +4,7 @@ on:
   push:
     branches: ["main"]
   pull_request:
-    types: [opened, reopened, synchronize]
-  repository_dispatch:
-    types: [create-pull-request]
+    types: [opened, reopened, synchronize, ready_for_review]
 
 jobs:
   build-stm32:

.github/workflows/build-zephyr.yml

@@ -4,9 +4,7 @@ on:
   push:
     branches: ["main"]
   pull_request:
-    types: [opened, reopened, synchronize]
-  repository_dispatch:
-    types: [create-pull-request]
+    types: [opened, reopened, synchronize, ready_for_review]
 
 jobs:
   build-zephyr:

.github/workflows/lint.yml

@@ -4,9 +4,7 @@ on:
   push:
     branches: ["main"]
   pull_request:
-    types: [opened, reopened, synchronize]
-  repository_dispatch:
-    types: [create-pull-request]
+    types: [opened, reopened, synchronize, ready_for_review]
 
 jobs:
   validate_format_config:

.github/workflows/update-swift-version.yml

@@ -0,0 +1,87 @@
+name: Update Swift Version
+
+on:
+  pull_request:
+    types: [opened, reopened, synchronize]
+  schedule:
+    - cron: '0 0 */14 * *'  # Every 14 days at midnight UTC
+  workflow_dispatch:
+
+jobs:
+  update-swift-version:
+    name: Create or update PR
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: write
+      pull-requests: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Git
+        run: |
+          git config --global user.name "github-actions"
+          git config --global user.email "[email protected]"
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update -qq
+          sudo apt-get install -y curl jq
+
+      - name: Open pull request if needed
+        id: update
+        run: |
+          set -ex
+
+          git fetch
+          branch=ci/update-swift-version
+          if git ls-remote --exit-code --heads origin "$branch"; then
+            git checkout -b "$branch" --track "origin/$branch"
+          else
+            git checkout -b "$branch"
+          fi
+
+          uname=$(uname -m)
+          curl -O "https://download.swift.org/swiftly/linux/swiftly-$uname.tar.gz"
+          tar zxf "swiftly-$uname.tar.gz"
+          ./swiftly init \
+            --skip-install \
+            --assume-yes \
+            --quiet-shell-followup \
+            --no-modify-profile
+          . "$HOME/.local/share/swiftly/env.sh"
+
+          swift_version=".swift-version"
+          latest=$(swiftly list-available main-snapshot | grep main-snapshot | head -n 1 | awk '{print $1}')
+          echo -n "$latest" > "$swift_version"
+          echo "version=$latest" >> "$GITHUB_OUTPUT"
+
+          title="Update to $latest"
+          body="Updates the \`.swift-version\` file to Swift \`$latest\`.
+
+          > This PR was automatically generated."
+
+          if [[ -n "$(git status --porcelain "$swift_version")" ]]; then
+            git add "$swift_version"
+            git commit -m "$title" -m "$body"
+            git push -u origin "$branch"
+          fi
+
+          pr=$(gh pr list --head "$branch" --state open --json number --jq '.[0].number')
+          if [[ -z "$pr" ]]; then
+            gh pr create \
+              --title "$title" \
+              --body "$body" \
+              --head "$branch" \
+              --base "main" \
+              --draft
+          else
+            gh pr edit \
+              --title "$title" \
+              --body "$body"
+          fi
+
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}