Generate each channel only for lint (#36)

.github/workflows/lint.yml

@@ -1,12 +1,22 @@
 name: Lint
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
 jobs:
   build:
     name: Add-on configuration
     runs-on: ubuntu-latest
     strategy:
       matrix:
-         channel: [esphome, esphome-beta, esphome-dev]
+        channels:
+          - folder: esphome
+            channel: stable
+          - folder: esphome-beta
+            channel: beta
+          - folder: esphome-dev
+            channel: dev
     steps:
       - name: ⤵️ Check out code from GitHub
         uses: actions/checkout@v2
@@ -17,8 +27,8 @@ jobs:
       - name: 🛠 Install dependencies
         run: pip install -r script/requirements.txt
       - name: 🛠 Generate files from template
-        run: python script/generate.py dev beta stable
-      - name: 🚀 Run Home Assistant Add-on Lint on ${{ matrix.channel }}
+        run: python script/generate.py ${{ matrix.channels.channel }}
+      - name: 🚀 Run Home Assistant Add-on Lint on ${{ matrix.channels.channel }}
         uses: frenck/action-addon-linter@v2
         with:
-          path: "./${{ matrix.channel }}"
+          path: "./${{ matrix.channels.folder }}"