Prevent GH Action from failing on removed branches (#136)

.github/workflows/pull_request.yml

@@ -0,0 +1,61 @@
+name: Build OS image on PR
+
+on: [pull_request]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-20.04
+
+    steps:
+    - name: Run apt update
+      run: sudo apt update
+
+    - name: Install dependencies
+      run: sudo apt -y install quilt qemu-user-static debootstrap libarchive-tools jq
+
+    - name: Nuke current Docker installation
+      run: |
+        sudo systemctl stop docker
+        sudo apt-get purge docker-ce docker-ce-cli containerd.io moby-engine moby-cli
+        sudo rm -rf /var/lib/docker
+    - name: Re-install Docker
+      run: |
+        curl -fsSL https://get.docker.com | sudo sh
+        docker --version
+    - name: Enable experimental features in Docker
+      run: |
+        sudo rm -rf /etc/docker/daemon.json
+        echo '{"experimental": true}' | sudo tee -a /etc/docker/daemon.json
+        sudo systemctl restart docker
+    - name: Download Umbrel OS build scripts
+      run: |
+        git clone git://github.com/getumbrel/umbrel-os.git
+    - name: Setting env vars
+      env:
+        PR: ${{ github.event.number }}
+      run: |
+        UMBREL_OS_VERSION="dev"
+        IMAGE_NAME="umbrel-os-dev"
+        UMBREL_REPO="$(curl -s https://api.github.com/repos/getumbrel/umbrel/pulls/${PR} | jq .head.repo.clone_url | sed 's/"//g')"
+        UMBREL_BRANCH="$(curl -s https://api.github.com/repos/getumbrel/umbrel/pulls/${PR} | jq .head.ref | sed 's/"//g')"
+        echo "::set-env name=UMBREL_OS_VERSION::$UMBREL_OS_VERSION"
+        echo "::set-env name=IMAGE_NAME::$IMAGE_NAME"
+        echo "::set-env name=UMBREL_REPO::$UMBREL_REPO"
+        echo "::set-env name=UMBREL_BRANCH::$UMBREL_BRANCH"
+              
+    - name: Build Umbrel OS
+      run: |
+        cd umbrel-os
+        echo "Building $IMAGE_NAME"
+        sudo IMG_FILENAME=$IMAGE_NAME ZIP_FILENAME=$IMAGE_NAME UMBREL_OS_VERSION=$UMBREL_OS_VERSION UMBREL_REPO=$UMBREL_REPO UMBREL_BRANCH=$UMBREL_BRANCH ./build.sh
+        cd ..
+        
+    - name: Copy ZIP to current working dir
+      run: cp umbrel-os/deploy/*.zip ./
+
+    - name: Uploading artifacts
+      uses: actions/upload-artifact@v2
+      with:
+        path: ${{ env.IMAGE_NAME }}.zip
+        name: ${{ env.IMAGE_NAME }}.zip

.github/workflows/main.yml → .github/workflows/push.yml

@@ -1,6 +1,9 @@
-name: Build OS image on push/PR
+name: Build OS image of current master
 
-on: [push]
+on:
+  push:
+    branches:
+      - master
 
 jobs:
   build:
@@ -8,11 +11,6 @@ jobs:
     runs-on: ubuntu-20.04
 
     steps:
-    - uses: actions/checkout@v1
-    - uses: jwalton/gh-find-current-pr@b6f8d7342efe4913388d5d1ac7f4b956caa5db52 # v1.0.2
-      id: findPr
-      with:
-        github-token: ${{ secrets.GITHUB_TOKEN }}
     - name: Run apt update
       run: sudo apt update
 
@@ -47,16 +45,6 @@ jobs:
         echo "::set-env name=IMAGE_NAME::$IMAGE_NAME"
         echo "::set-env name=UMBREL_REPO::$UMBREL_REPO"
         echo "::set-env name=UMBREL_BRANCH::$UMBREL_BRANCH"
-    - name: Setting env vars for PR
-      if: success() && steps.findPr.outputs.pr
-      env:
-        PR: ${{ steps.findPr.outputs.pr }}
-      run: |
-        echo "Building PR #${PR}"
-        UMBREL_REPO="$(curl https://api.github.com/repos/getumbrel/umbrel/pulls/${PR} | jq .head.repo.clone_url | sed 's/"//g')"
-        UMBREL_BRANCH="$(curl https://api.github.com/repos/getumbrel/umbrel/pulls/${PR} | jq .head.ref | sed 's/"//g')"
-        echo "::set-env name=UMBREL_REPO::$UMBREL_REPO"
-        echo "::set-env name=UMBREL_BRANCH::$UMBREL_BRANCH"
               
     - name: Build Umbrel OS
       run: |