Add multi-module support to project infrastructure

.github/workflows/check-go-task.yml

@@ -10,15 +10,15 @@ on:
     paths:
       - ".github/workflows/check-go-task.yml"
       - "Taskfile.yml"
-      - "go.mod"
-      - "go.sum"
+      - "**/go.mod"
+      - "**/go.sum"
       - "**.go"
   pull_request:
     paths:
       - ".github/workflows/check-go-task.yml"
       - "Taskfile.yml"
-      - "go.mod"
-      - "go.sum"
+      - "**/go.mod"
+      - "**/go.sum"
       - "**.go"
   schedule:
     # Run every Tuesday at 8 AM UTC to catch breakage caused by changes to tools.
@@ -28,8 +28,16 @@ on:
 
 jobs:
   check-errors:
+    name: check-errors (${{ matrix.module.path }})
     runs-on: ubuntu-latest
 
+    strategy:
+      fail-fast: false
+
+      matrix:
+        module:
+          - path: ./
+
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2
@@ -46,11 +54,21 @@ jobs:
           version: 3.x
 
       - name: Check for errors
+        env:
+          GO_MODULE_PATH: ${{ matrix.module.path }}
         run: task go:vet
 
   check-outdated:
+    name: check-outdated (${{ matrix.module.path }})
     runs-on: ubuntu-latest
 
+    strategy:
+      fail-fast: false
+
+      matrix:
+        module:
+          - path: ./
+
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2
@@ -67,14 +85,24 @@ jobs:
           version: 3.x
 
       - name: Modernize usages of outdated APIs
+        env:
+          GO_MODULE_PATH: ${{ matrix.module.path }}
         run: task go:fix
 
       - name: Check if any fixes were needed
         run: git diff --color --exit-code
 
   check-style:
+    name: check-style (${{ matrix.module.path }})
     runs-on: ubuntu-latest
 
+    strategy:
+      fail-fast: false
+
+      matrix:
+        module:
+          - path: ./
+
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2
@@ -94,11 +122,21 @@ jobs:
         run: go install golang.org/x/lint/golint@latest
 
       - name: Check style
+        env:
+          GO_MODULE_PATH: ${{ matrix.module.path }}
         run: task --silent go:lint
 
   check-formatting:
+    name: check-formatting (${{ matrix.module.path }})
     runs-on: ubuntu-latest
 
+    strategy:
+      fail-fast: false
+
+      matrix:
+        module:
+          - path: ./
+
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2
@@ -115,14 +153,24 @@ jobs:
           version: 3.x
 
       - name: Format code
+        env:
+          GO_MODULE_PATH: ${{ matrix.module.path }}
         run: task go:format
 
       - name: Check formatting
         run: git diff --color --exit-code
 
   check-config:
+    name: check-config (${{ matrix.module.path }})
     runs-on: ubuntu-latest
 
+    strategy:
+      fail-fast: false
+
+      matrix:
+        module:
+          - path: ./
+
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2
@@ -133,6 +181,7 @@ jobs:
           go-version: ${{ env.GO_VERSION }}
 
       - name: Run go mod tidy
+        working-directory: ${{ matrix.module.path }}
         run: go mod tidy
 
       - name: Check whether any tidying was needed

.github/workflows/test-go-task.yml

@@ -10,16 +10,16 @@ on:
   push:
     paths:
       - ".github/workflows/test-go-task.ya?ml"
-      - "go.mod"
-      - "go.sum"
+      - "**/go.mod"
+      - "**/go.sum"
       - "Taskfile.ya?ml"
       - "**/testdata/**"
       - "**.go"
   pull_request:
     paths:
       - ".github/workflows/test-go-task.ya?ml"
-      - "go.mod"
-      - "go.sum"
+      - "**/go.mod"
+      - "**/go.sum"
       - "Taskfile.ya?ml"
       - "**/testdata/**"
       - "**.go"
@@ -56,7 +56,18 @@ jobs:
           name: libraries-repository-engine
 
   test:
-    runs-on: ubuntu-latest
+    name: test (${{ matrix.module.path }} - ${{ matrix.operating-system }})
+
+    strategy:
+      fail-fast: false
+
+      matrix:
+        operating-system:
+          - ubuntu-latest
+        module:
+          - path: ./
+
+    runs-on: ${{ matrix.operating-system }}
 
     steps:
       - name: Checkout repository
@@ -88,4 +99,6 @@ jobs:
           version: 3.x
 
       - name: Run tests
+        env:
+          GO_MODULE_PATH: ${{ matrix.module.path }}
         run: task go:test

Taskfile.yml

@@ -2,8 +2,11 @@
 version: "3"
 
 vars:
+  # Path of the project's primary Go module:
+  DEFAULT_GO_MODULE_PATH: ./
   DEFAULT_GO_PACKAGES:
-    sh: echo $(go list ./... | tr '\n' ' ')
+    sh: |
+      echo $(cd {{default .DEFAULT_GO_MODULE_PATH .GO_MODULE_PATH}} && go list ./... | tr '\n' ' ' || echo '"ERROR: Unable to discover Go packages"')
 
 tasks:
   build:
@@ -31,12 +34,14 @@ tasks:
   # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/go-task/Taskfile.yml
   go:build:
     desc: Build the Go code
+    dir: "{{.DEFAULT_GO_MODULE_PATH}}"
     cmds:
       - go build -v -o libraries-repository-engine{{exeExt}}
 
   # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/test-go-task/Taskfile.yml
   go:test:
     desc: Run unit tests
+    dir: "{{default .DEFAULT_GO_MODULE_PATH .GO_MODULE_PATH}}"
     cmds:
       - go test -v -short -run '{{default ".*" .GO_TEST_REGEX}}' {{default "-timeout 10m -coverpkg=./... -covermode=atomic" .GO_TEST_FLAGS}} -coverprofile=coverage_unit.txt {{default .DEFAULT_GO_PACKAGES .GO_PACKAGES}}
 
@@ -58,18 +63,21 @@ tasks:
   # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-go-task/Taskfile.yml
   go:vet:
     desc: Check for errors in Go code
+    dir: "{{default .DEFAULT_GO_MODULE_PATH .GO_MODULE_PATH}}"
     cmds:
       - go vet {{default .DEFAULT_GO_PACKAGES .GO_PACKAGES}}
 
   # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-go-task/Taskfile.yml
   go:fix:
     desc: Modernize usages of outdated APIs
+    dir: "{{default .DEFAULT_GO_MODULE_PATH .GO_MODULE_PATH}}"
     cmds:
       - go fix {{default .DEFAULT_GO_PACKAGES .GO_PACKAGES}}
 
   # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-go-task/Taskfile.yml
   go:lint:
     desc: Lint Go code
+    dir: "{{default .DEFAULT_GO_MODULE_PATH .GO_MODULE_PATH}}"
     cmds:
       - |
         if ! which golint &>/dev/null; then
@@ -84,6 +92,7 @@ tasks:
   # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-go-task/Taskfile.yml
   go:format:
     desc: Format Go code
+    dir: "{{default .DEFAULT_GO_MODULE_PATH .GO_MODULE_PATH}}"
     cmds:
       - go fmt {{default .DEFAULT_GO_PACKAGES .GO_PACKAGES}}