Create CODEOWNERS and validation

.github/workflows/codeowners-validation.yml

@@ -0,0 +1,56 @@
+name: CODEOWNERS Validation
+run-name: ${{ github.actor }} is checking each Dockerfile for a CODEOWNER
+on:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  CheckDockerfileCodeowners:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v4
+      - name: Check each Dockerfile for a CODEOWNER
+        run: |
+          #!/bin/bash
+          set -e
+
+          codeOwnersFilePath="CODEOWNERS"
+          codeOwnerPaths=()
+
+          # Read and parse the CODEOWNERS file
+          while IFS= read -r line; do
+            if [[ "$line" =~ ^\s*# ]] || [[ -z "$line" ]] || [[ "$line" =~ ^[[:space:]]*$ ]]; then
+              continue
+            fi
+
+            path=$(echo "$line" | cut -d' ' -f1 | sed 's/^[[:space:]]*//' | sed 's/[\/&]/\\&/g' | sed 's/\./\\./g' | sed 's/\*/.*/g')
+            codeOwnerPaths+=("$path")
+          done < "$codeOwnersFilePath"
+
+          filesWithoutOwner=()
+          dockerfiles=$(find . -type f -name "Dockerfile")
+
+          # Check each Dockerfile for an owner
+          for dockerfile in $dockerfiles; do
+            ownerFound=false
+            for path in "${codeOwnerPaths[@]}"; do
+              if [[ "$dockerfile" =~ $path ]]; then
+                ownerFound=true
+                break
+              fi
+            done
+
+            if [[ "$ownerFound" == false ]]; then
+              filesWithoutOwner+=("$dockerfile")
+            fi
+          done
+
+          # Fail the build if there are files without an owner
+          if [[ ${#filesWithoutOwner[@]} -gt 0 ]]; then
+            echo "The following Dockerfiles do not have an owner in the CODEOWNERS file:"
+              printf "%s\n" "${filesWithoutOwner[@]}"
+            exit 1
+          fi
+

CODEOWNERS

@@ -1,4 +1,74 @@
 # Users referenced in this file will automatically be requested as reviewers for PRs that modify the given paths.
 # See https://help.github.com/articles/about-code-owners/
 
-* @dotnet/dotnet-docker-reviewers
+### General infra ###
+/* @dotnet/dotnet-docker-reviewers
+eng/ @dotnet/dotnet-docker-reviewers
+
+### Dockerfiles ###
+
+# almalinux
+src/almalinux/**/source-build/ @dotnet/source-build-internal
+src/almalinux/**/helix/ @dotnet/dnceng
+
+# alpine
+src/alpine/**/helix/ @dotnet/dnceng
+src/alpine/**/amd64/ @dotnet/dotnet-source-build-internal
+
+# azurelinux
+src/azurelinux/**/cross*/ @dotnet/runtime-infrastructure
+src/azurelinux/**/android/ @dotnet/runtime-infrastructure
+src/azurelinux/**/fpm/ @dotnet/runtime-infrastructure
+src/azurelinux/**/opt/ @dotnet/runtime-infrastructure
+src/azurelinux/**/webassembly/ @dotnet/runtime-infrastructure
+
+# cbl-mariner
+src/cbl-mariner/**/cross*/ @dotnet/runtime-infrastructure
+src/cbl-mariner/**/android/ @dotnet/runtime-infrastructure
+src/cbl-mariner/**/fpm/ @dotnet/runtime-infrastructure
+src/cbl-mariner/**/opt/ @dotnet/runtime-infrastructure
+src/cbl-mariner/**/webassembly/ @dotnet/runtime-infrastructure
+src/cbl-mariner/**/docker-testrunner/ @lbussell @mthalman @dotnet/dotnet-docker-reviewers
+src/cbl-mariner/2.0/amd64/ @dotnet/runtime-infrastructure
+src/cbl-mariner/2.0/helix/ @dotnet/dnceng
+
+# centos
+src/centos/stream9/amd64/ @dotnet/source-build-internal
+src/centos/stream9/helix/ @dotnet/dnceng
+src/centos/stream9/mlnet/helix/ @dotnet/dnceng
+
+# debian
+src/debian/11/amd64/ @dotnet/source-build-internal
+src/debian/11/arm64v8/ @dotnet/source-build-internal
+src/debian/**/helix/ @dotnet/dnceng
+src/debian/11/opt/arm64v8/ @dotnet/runtime-infrastructure
+src/debian/12/gcc14/amd64/ @dotnet/runtime-infrastructure
+
+# fedora
+src/fedora/**/amd64/ @dotnet/source-build-internal
+
+# nanoserver
+src/nanoserver/1809/helix/amd64/ @dotnet/dnceng
+
+# opensuse
+src/opensuse/15.4/helix/amd64/ @dotnet/dnceng
+
+# raspbian
+src/raspbian/10/crossdeps/arm32v7/ @dotnet/runtime-infrastructure
+src/raspbian/10/helix/arm32v6/ @dotnet/dnceng
+
+# ubuntu
+src/ubuntu/**/helix/ @dotnet/dnceng
+src/ubuntu/**/cross*/ @dotnet/runtime-infrastructure
+src/ubuntu/**/debpkg/ @dotnet/runtime-infrastructure
+src/ubuntu/**/webassembly*/ @dotnet/runtime-infrastructure
+src/ubuntu/22.04/mlnet/ @dotnet/runtime-infrastructure
+src/ubuntu/22.04/opt/arm64v8/ @dotnet/runtime-infrastructure
+src/ubuntu/common/coredeps/ @dotnet/runtime-infrastructure
+src/ubuntu/20.04/Dockerfile @dotnet/source-build-internal
+src/ubuntu/22.04/Dockerfile @dotnet/source-build-internal
+src/ubuntu/24.04/Dockerfile @dotnet/source-build-internal
+
+# windowsservercore
+src/windowsservercore/**/helix/ @dotnet/runtime-infrastructure
+src/windowsservercore/**/webassembly/ @dotnet/runtime-infrastructure