cicd: Update GH Actions setup

- Update GH Actions workflow for go test
- Add golangci linter config from neofs-node
- Add DCO check for PR commits

Signed-off-by: Stanislav Bogatyrev <stanislav@nspcc.ru>

.github/workflows/dco.yml

@@ -0,0 +1,21 @@
+name: DCO check
+
+on:
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  commits_check_job:
+    runs-on: ubuntu-latest
+    name: Commits Check
+    steps:
+    - name: Get PR Commits
+      id: 'get-pr-commits'
+      uses: tim-actions/get-pr-commits@master
+      with:
+        token: ${{ secrets.GITHUB_TOKEN }}
+    - name: DCO Check
+      uses: tim-actions/dco@master
+      with:
+        commits: ${{ steps.get-pr-commits.outputs.commits }}

.github/workflows/go.yml

@@ -1,4 +1,5 @@
-name: Go
+name: neofs-api-go tests
+
 on:
   push:
     branches:
@@ -10,45 +11,34 @@ on:
       - master
     paths-ignore:
       - '*.md'
-jobs:
 
+jobs:
   test:
-    name: test
+    runs-on: ubuntu-20.04
-    runs-on: ubuntu-latest
     strategy:
       matrix:
         go: [ '1.14.x', '1.15.x' ]
     steps:
-
       - name: Setup go
-      uses: actions/setup-go@v1
+        uses: actions/setup-go@v2
         with:
           go-version: ${{ matrix.go }}
-      id: go
 
-    - name: Check out code into the Go module directory
+      - name: Check out code
         uses: actions/checkout@v2
 
-    - name: Set GOPATH
+      - name: Cache go mod
-      # temporary fix
+        uses: actions/cache@v2
-      # see https://github.com/actions/setup-go/issues/14
-      run: |
-        echo "##[set-env name=GOPATH;]$(dirname $GITHUB_WORKSPACE)"
-        echo "##[add-path]$(dirname $GITHUB_WORKSPACE)/bin"
-      shell: bash
-
-    - uses: actions/cache@v1
         with:
           path: ~/go/pkg/mod
-        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          key: ${{ runner.os }}-go-${{ matrix.go }}-${{ hashFiles('**/go.sum') }}
           restore-keys: |
-          ${{ runner.os }}-go-
+            ${{ runner.os }}-go-${{ matrix.go }}-
 
       - name: Get dependencies
-      run: |
+        run: make dep
-        go mod tidy -v
 
-    - name: Tests
+      - name: Run go test
         run: go test -coverprofile=coverage.txt -covermode=atomic ./...
 
       - name: Codecov
@@ -56,12 +46,11 @@ jobs:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
         run: bash <(curl -s https://codecov.io/bash)
 
-  golangci:
+  lint:
-    name: lint
+    runs-on: ubuntu-20.04
-    runs-on: ubuntu-latest
     steps:
-
+      - name: Check out code
-      - uses: actions/checkout@v2
+        uses: actions/checkout@v2
 
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v2

.golangci.yml

@@ -0,0 +1,136 @@
+# https://habr.com/company/roistat/blog/413175/
+# https://github.com/golangci/golangci-lint
+linters-settings:
+  govet:
+    check-shadowing: false
+  golint:
+    # minimal confidence for issues, default is 0.8
+    min-confidence: 0.8
+  gofmt:
+    # simplify code: gofmt with `-s` option, true by default
+    simplify: true
+  gocyclo:
+    min-complexity: 30
+  maligned:
+    suggest-new: true
+  dupl:
+    threshold: 100
+  goconst:
+    min-len: 2
+    min-occurrences: 2
+  gosimple:
+  gocritic:
+    # Which checks should be enabled; can't be combined with 'disabled-checks';
+    # See https://go-critic.github.io/overview#checks-overview
+    # To check which checks are enabled run `GL_DEBUG=gocritic golangci-lint run`
+    # By default list of stable checks is used.
+#    enabled-checks:
+#      - rangeValCopy
+    # Which checks should be disabled; can't be combined with 'enabled-checks'; default is empty
+    disabled-checks:
+      - regexpMust
+    # Enable multiple checks by tags, run `GL_DEBUG=gocritic golangci-lint` run to see all tags and checks.
+    # Empty list by default. See https://github.com/go-critic/go-critic#usage -> section "Tags".
+    enabled-tags:
+      - performance
+
+    settings: # settings passed to gocritic
+      captLocal: # must be valid enabled check name
+        paramsOnly: true
+      rangeValCopy:
+        sizeThreshold: 32
+#  depguard:
+#    list-type: blacklist
+#    include-go-root: false
+#    packages:
+#      - github.com/davecgh/go-spew/spew
+  lll:
+    # max line length, lines longer will be reported. Default is 120.
+    # '\t' is counted as 1 character by default, and can be changed with the tab-width option
+    line-length: 120
+    # tab width in spaces. Default to 1.
+    tab-width: 1
+  unused:
+    # treat code as a program (not a library) and report unused exported identifiers; default is false.
+    # XXX: if you enable this setting, unused will report a lot of false-positives in text editors:
+    # if it's called for subdir of a project it can't find funcs usages. All text editor integrations
+    # with golangci-lint call it on a directory with the changed file.
+    check-exported: false
+  unparam:
+    # Inspect exported functions, default is false. Set to true if no external program/library imports your code.
+    # XXX: if you enable this setting, unparam will report a lot of false-positives in text editors:
+    # if it's called for subdir of a project it can't find external interfaces. All text editor integrations
+    # with golangci-lint call it on a directory with the changed file.
+    check-exported: false
+  nakedret:
+    # make an issue if func has more lines of code than this setting and it has naked returns; default is 30
+    max-func-lines: 30
+
+
+linters:
+  enable-all: true
+  fast: false
+  disable:
+    - gochecknoglobals
+#    - maligned
+#    - prealloc
+#  disable-all: false
+#  presets:
+#    - bugs
+#    - unused
+
+# options for analysis running
+run:
+  # default concurrency is a available CPU number
+#  concurrency: 8
+
+  # timeout for analysis, e.g. 30s, 5m, default is 1m
+#  deadline: 1m
+
+  # exit code when at least one issue was found, default is 1
+#  issues-exit-code: 1
+
+  # include test files or not, default is true
+#  tests: true
+
+  # list of build tags, all linters use it. Default is empty list.
+#  build-tags:
+#    - mytag
+
+  # which dirs to skip: they won't be analyzed;
+  # can use regexp here: generated.*, regexp is applied on full path;
+  # default value is empty list, but next dirs are always skipped independently
+  # from this option's value:
+  #   	vendor$, third_party$, testdata$, examples$, Godeps$, builtin$
+#  skip-dirs:
+#    - src/external_libs
+#    - autogenerated_by_my_lib
+
+  # which files to skip: they will be analyzed, but issues from them
+  # won't be reported. Default value is empty list, but there is
+  # no need to include all autogenerated files, we confidently recognize
+  # autogenerated files. If it's not please let us know.
+#  skip-files:
+#    - ".*\\.my\\.go$"
+#    - lib/bad.go
+
+  # by default isn't set. If set we pass it to "go list -mod={option}". From "go help modules":
+  # If invoked with -mod=readonly, the go command is disallowed from the implicit
+  # automatic updating of go.mod described above. Instead, it fails when any changes
+  # to go.mod are needed. This setting is most useful to check that go.mod does
+  # not need updates, such as in a continuous integration and testing system.
+  # If invoked with -mod=vendor, the go command assumes that the vendor
+  # directory holds the correct copies of dependencies and ignores
+  # the dependency descriptions in go.mod.
+#  modules-download-mode: readonly|release|vendor
+
+# output configuration options
+output:
+  # colored-line-number|line-number|json|tab|checkstyle|code-climate, default is "colored-line-number"
+  format: tab
+
+  # print lines of code with issue, default is true
+  print-issued-lines: true
+
+  # print linter name in the end of issue text, default is true
+  print-linter-name: true

Makefile

@@ -1,7 +1,9 @@
 #!/usr/bin/make -f
 SHELL = bash
 
-.PHONY: dep fmts fmt imports protoc
+VERSION ?= $(shell git describe --tags --dirty --always)
+
+.PHONY: dep fmts fmt imports protoc test lint version help
 
 # Pull go dependencies
 dep:
@@ -35,7 +37,7 @@ imports:
 		GO111MODULE=on goimports -w $$f; \
 	done
 
-# Regenerate proto files:
+# Regenerate code for proto files
 protoc:
 	@GOPRIVATE=github.com/nspcc-dev go mod vendor
 	# Install specific version for protobuf lib
@@ -48,3 +50,26 @@ protoc:
 			--gofast_out=plugins=grpc,paths=source_relative:. $$f; \
 	done
 	rm -rf vendor
+
+# Run Unit Test with go test
+test:
+	@echo "⇒ Runnning go test"
+	@GO111MODULE=on go test ./...
+
+# Run linters
+lint:
+	@golangci-lint run
+
+# Print version
+version:
+	@echo $(VERSION)
+
+# Show this help prompt
+help:
+	@echo '  Usage:'
+	@echo ''
+	@echo '    make <target>'
+	@echo ''
+	@echo '  Targets:'
+	@echo ''
+	@awk '/^#/{ comment = substr($$0,3) } comment && /^[a-zA-Z][a-zA-Z0-9_-]+ ?:/{ print "   ", $$1, comment }' $(MAKEFILE_LIST) | column -t -s ':' | grep -v 'IGNORE' | sort -u