CI: Add check-dependencies workflow

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

@@ -0,0 +1,99 @@
+# Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/check-dependencies-task.md
+name: Check Dependencies
+
+env:
+  # See: https://github.com/actions/setup-go/tree/v2#readme
+  GO_VERSION: "1.16"
+
+# See: https://docs.github.com/en/actions/reference/events-that-trigger-workflows
+on:
+  push:
+    paths:
+      - ".github/workflows/check-dependencies-task.ya?ml"
+      - ".licenses/**"
+      - ".licensed.json"
+      - ".licensed.ya?ml"
+      - "Taskfile.ya?ml"
+      - "**/go.mod"
+      - "**/go.sum"
+  pull_request:
+    paths:
+      - ".github/workflows/check-dependencies-task.ya?ml"
+      - ".licenses/**"
+      - ".licensed.json"
+      - ".licensed.ya?ml"
+      - "Taskfile.ya?ml"
+      - "**/go.mod"
+      - "**/go.sum"
+  workflow_dispatch:
+  repository_dispatch:
+
+jobs:
+  check-cache:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Install licensed
+        uses: jonabc/setup-licensed@v1
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          version: 3.x
+
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ env.GO_VERSION }}
+
+      - name: Install Task
+        uses: arduino/setup-task@v1
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          version: 3.x
+
+      - name: Update dependencies license metadata cache
+        run: task --silent general:cache-dep-licenses
+
+      - name: Check for outdated cache
+        id: diff
+        run: |
+          git add --intent-to-add .
+          git diff --color --exit-code
+
+      # Some might find it convenient to have CI generate the cache rather than setting up for it locally
+      - name: Upload cache to workflow artifact
+        if: failure() && steps.diff.outcome == 'failure'
+        uses: actions/upload-artifact@v2
+        with:
+          if-no-files-found: error
+          name: dep-licenses-cache
+          path: .licenses/
+
+  check-deps:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Install licensed
+        uses: jonabc/setup-licensed@v1
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          version: 3.x
+
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ env.GO_VERSION }}
+
+      - name: Install Task
+        uses: arduino/setup-task@v1
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          version: 3.x
+
+      - name: Check for dependencies with unapproved licenses
+        run: task --silent general:check-dep-licenses

.licensed.yml

@@ -0,0 +1,81 @@
+# See: https://github.com/github/licensed/blob/master/docs/configuration.md
+
+# Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-dependencies/AGPL-3.0/.licensed.yml
+allowed:
+  # Based on: https://www.gnu.org/licenses/license-list.html#GPLCompatibleLicenses
+  - gpl-1.0-or-later
+  - gpl-1.0+ # Deprecated ID for `gpl-1.0-or-later`
+  - gpl-2.0-or-later
+  - gpl-2.0+ # Deprecated ID for `gpl-2.0-or-later`
+  - gpl-3.0-only
+  - gpl-3.0 # Deprecated ID for `gpl-3.0-only`
+  - gpl-3.0-or-later
+  - gpl-3.0+ # Deprecated ID for `gpl-3.0-or-later`
+  - lgpl-2.0-or-later
+  - lgpl-2.0+ # Deprecated ID for `lgpl-2.0-or-later`
+  - lgpl-2.1-only
+  - lgpl-2.1 # Deprecated ID for `lgpl-2.1-only`
+  - lgpl-2.1-or-later
+  - lgpl-2.1+ # Deprecated ID for `lgpl-2.1-or-later`
+  - lgpl-3.0-only
+  - lgpl-3.0 # Deprecated ID for `lgpl-3.0-only`
+  - lgpl-3.0-or-later
+  - lgpl-3.0+ # Deprecated ID for `lgpl-3.0-or-later`
+  - agpl-1.0-or-later
+  - agpl-3.0-only
+  - agpl-3.0 # Deprecated ID for `agpl-3.0-only`
+  - agpl-3.0-or-later
+  - fsfap
+  - apache-2.0
+  - artistic-2.0
+  - clartistic
+  - sleepycat
+  - bsl-1.0
+  - bsd-3-clause
+  - cecill-2.0
+  - bsd-3-clause-clear
+  # "Cryptix General License" - no SPDX ID (https://github.com/spdx/license-list-XML/issues/456)
+  - ecos-2.0
+  - ecl-2.0
+  - efl-2.0
+  - eudatagrid
+  - mit
+  - bsd-2-clause # Subsumed by `bsd-2-clause-views`
+  - bsd-2-clause-netbsd # Deprecated ID for `bsd-2-clause`
+  - bsd-2-clause-views # This is the version linked from https://www.gnu.org/licenses/license-list.html#FreeBSD
+  - bsd-2-clause-freebsd # Deprecated ID for `bsd-2-clause-views`
+  - ftl
+  - hpnd
+  - imatix
+  - imlib2
+  - ijg
+  # "Informal license" - this is a general class of license
+  - intel
+  - isc
+  - mpl-2.0
+  - ncsa
+  # "License of Netscape JavaScript" - no SPDX ID
+  - oldap-2.7
+  # "License of Perl 5 and below" - possibly `Artistic-1.0-Perl` ?
+  - cc0-1.0
+  - cc-pddc
+  - psf-2.0
+  - ruby
+  - sgi-b-2.0
+  - smlnj
+  - standardml-nj # Deprecated ID for `smlnj`
+  - unicode-dfs-2015
+  - upl-1.0
+  - unlicense
+  - vim
+  - w3c
+  - wtfpl
+  - lgpl-2.0-or-later with wxwindows-exception-3.1
+  - wxwindows # Deprecated ID for `lgpl-2.0-or-later with wxwindows-exception-3.1`
+  - x11
+  - xfree86-1.1
+  - zlib
+  - zpl-2.0
+  - zpl-2.1
+  # Based on individual license text
+  - eupl-1.2

Taskfile.yml

@@ -57,3 +57,22 @@ tasks:
           -coverprofile=coverage_unit.txt \
           {{.TEST_LDFLAGS}} \
           {{default .DEFAULT_GO_PACKAGES .GO_PACKAGES}}
+
+  # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-dependencies-task/Taskfile.yml
+  general:cache-dep-licenses:
+    desc: Cache dependency license metadata
+    cmds:
+      - |
+        if ! which licensed &>/dev/null; then
+          echo "licensed not found or not in PATH. Please install: https://github.com/github/licensed#as-an-executable"
+          exit 1
+        fi
+      - licensed cache
+
+  # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-dependencies-task/Taskfile.yml
+  general:check-dep-licenses:
+    desc: Check for unapproved dependency licenses
+    deps:
+      - task: general:cache-dep-licenses
+    cmds:
+      - licensed status