[CI] Skip build CI if only configs or docs modification. (#575)

* [CI] Skip build CI if only configs or docs modification.

* Use ubuntu latest

.github/workflows/build.yml

@@ -1,26 +1,32 @@
-# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
+# This workflow will install Python dependencies, run tests with a variety of Python versions
 # For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
 
 name: build
 
-on: [push, pull_request]
+on:
+  push:
+    paths-ignore:
+      - 'README.md'
+      - 'README_zh-CN.md'
+      - 'model-index.yml'
+      - 'docs/**'
+      - 'docs_zh-CN/**'
+      - 'configs/**.md'
+      - 'demo/**'
+      - '.dev_scripts/**'
+
+  pull_request:
+    paths-ignore:
+      - 'README.md'
+      - 'README_zh-CN.md'
+      - 'model-index.yml'
+      - 'docs/**'
+      - 'docs_zh-CN/**'
+      - 'configs/**.md'
+      - 'demo/**'
+      - '.dev_scripts/**'
 
 jobs:
-  lint:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      - name: Set up Python 3.7
-        uses: actions/setup-python@v1
-        with:
-          python-version: 3.7
-      - name: Install pre-commit hook
-        run: |
-          pip install pre-commit
-          pre-commit install
-      - name: Linting
-        run: pre-commit run --all-files
-
   build_without_timm:
     runs-on: ubuntu-latest
     env:

.github/workflows/lint.yml

@@ -0,0 +1,21 @@
+# This workflow will run lint
+
+name: lint
+
+on: [push, pull_request]
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python 3.7
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.7
+      - name: Install pre-commit hook
+        run: |
+          pip install pre-commit
+          pre-commit install
+      - name: Linting
+        run: pre-commit run --all-files