Run PR validation check only when needed & use docker cache during build (#876)

* Improve PR validation checks

.github/workflows/build.yml

@@ -15,15 +15,23 @@ jobs:
     name: CLI executable build
     runs-on: ubuntu-latest
     steps:
+      - name: Check out code into the Go module directory
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 2
+      
+      - name: Check modified files
+        id: modified_files
+        run: devops/check_modified_files.sh cli/
+
       - name: Set up Go 1.17
+        if: steps.modified_files.outputs.matched == 'true'
         uses: actions/setup-go@v2
         with:
           go-version: '1.17'
 
-      - name: Check out code into the Go module directory
-        uses: actions/checkout@v2
-
       - name: Build CLI
+        if: steps.modified_files.outputs.matched == 'true'
         run: make cli
 
   build-agent:
@@ -32,6 +40,23 @@ jobs:
     steps:
       - name: Check out code into the Go module directory
         uses: actions/checkout@v2
+        with:
+          fetch-depth: 2
+      
+      - name: Check modified files
+        id: modified_files
+        run: devops/check_modified_files.sh agent/ shared/ tap/ ui/ Dockerfile
 
-      - name: Build Agent
-        run: make agent-docker
+      - name: Set up Docker Buildx
+        if: steps.modified_files.outputs.matched == 'true'
+        uses: docker/setup-buildx-action@v1
+
+      - name: Build
+        uses: docker/build-push-action@v2
+        if: steps.modified_files.outputs.matched == 'true'
+        with:
+          context: .
+          push: false
+          tags: up9inc/mizu:devlatest
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

.github/workflows/test.yml

@@ -19,14 +19,16 @@ jobs:
     name: Unit Tests
     runs-on: ubuntu-latest
     steps:
+      - name: Check out code into the Go module directory
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 2
+
       - name: Set up Go 1.17
         uses: actions/setup-go@v2
         with:
           go-version: '^1.17'
 
-      - name: Check out code into the Go module directory
-        uses: actions/checkout@v2
-
       - name: Install libpcap
         shell: bash
         run: |
@@ -40,16 +42,31 @@ jobs:
       - name: 'Set up Cloud SDK'
         uses: 'google-github-actions/setup-gcloud@v0'
 
+      - name: Check CLI modified files
+        id: cli_modified_files
+        run: devops/check_modified_files.sh cli/
+
       - name: CLI Test
+        if: github.event_name == 'push' || steps.cli_modified_files.outputs.matched == 'true'
         run: make test-cli
 
+      - name: Check Agent modified files
+        id: agent_modified_files
+        run: devops/check_modified_files.sh agent/
+
       - name: Agent Test
+        if: github.event_name == 'push' || steps.agent_modified_files.outputs.matched == 'true'
         run: make test-agent
 
       - name: Shared Test
         run: make test-shared
+      
+      - name: Check extensions modified files
+        id: ext_modified_files
+        run: devops/check_modified_files.sh tap/extensions/
 
       - name: Extensions Test
+        if: github.event_name == 'push' || steps.ext_modified_files.outputs.matched == 'true'
         run: make test-extensions
 
       - name: Upload coverage to Codecov

devops/check_modified_files.sh

@@ -0,0 +1,45 @@
+#!/bin/bash
+paths_arr=( "$@" )
+
+printf "\n========== List modified files ==========\n"
+echo "$(git diff --name-only HEAD^ HEAD)"
+
+printf "\n========== List paths to match and check existence ==========\n"
+for path in ${paths_arr[*]}
+do
+  if [ -f "$path" ] || [ -d "$path" ]; then
+      echo "$path - found"
+  else
+      echo "$path - does not found - exiting with failure"
+      exit 1
+  fi
+done
+
+printf "\n========== Check paths of modified files ==========\n"
+git diff --name-only HEAD^ HEAD > files.txt
+matched=false
+while IFS= read -r file
+do
+  for path in ${paths_arr[*]}
+  do
+      if [[ $file == $path* ]]; then
+        echo "$file - match path: $path"
+        matched=true
+        break
+      fi
+  done
+  if [[ $matched == true ]]; then
+      break
+  else
+      echo "$file - does not match any given path"
+  fi
+done < files.txt
+
+printf "\n========== Result ==========\n"
+if [[ $matched = true ]]; then
+  echo "match found"
+  echo "::set-output name=matched::true"
+else
+  echo "no match found"
+  echo "::set-output name=matched::false"
+fi