workflows: add common Go linter, fix #21

This tries to unify golangci-lint settings we use across ~20 Go repositories
and simplify maintenance. In general, we have two sources of golangci.yml
files copied across different repositories: neofs-node and neo-go. They differ:
 * neofs-node doesn't care about tests, neo-go does
 * neofs-node has additional settings for gofmt/gomodguard/revive
 * neo-go has additional settings for issues with exclusions
 * neo-go doesn't use exhaustive
 * neofs-node doesn't use bodyclose/contextcheck/decorder/errorlint

The golangci.yml added here:
 * cares about tests
 * uses additional rules from neofs-node, they're useful
 * drops neo-go settings from the 'issues' section, they seem to be useless
 * enables all linters from both worlds

Which practically means that it causes some pain below the spine for just about
any repository. But likely those can be fixed.

Signed-off-by: Roman Khimov <[email protected]>

.github/workflows/go-linter.yml

@@ -0,0 +1,41 @@
+name: Go linter
+
+on:
+  workflow_call:
+    inputs:
+      ref:
+        description: 'Ref to test [default: latest master; examples: 0a4ff9d3e4a9ab432fd5812eb18c98e03b5a7432'
+        required: false
+        default: ''
+      workdir:
+        description: 'Working directory'
+	required: false
+	default: '.'
+
+jobs:
+  linter:
+    name: Lint
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.inputs.ref }}
+
+      - name: Checkout .github repository
+        uses: actions/checkout@v4
+        with:
+          repository: nspcc-dev/.github
+          path: nspcc-gh
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: ${{ github.event.inputs.workdir }}/go.mod
+          cache-dependency-path: ${{ github.event.inputs.workdir }}/go.sum
+
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v6
+        with:
+          version: latest
+          working-directory: ${{ github.event.inputs.workdir }}
+          args: --config=${{ github.workspace }}/nspcc-gh/.golangci.yml

.golangci.yml

@@ -0,0 +1,76 @@
+# This file contains all available configuration options
+# with their default values.
+
+# options for analysis running
+run:
+  # timeout for analysis, e.g. 30s, 5m, default is 1m
+  timeout: 5m
+
+  # include test files or not, default is true
+  tests: true
+
+# output configuration options
+output:
+  # colored-line-number|line-number|json|tab|checkstyle|code-climate, default is "colored-line-number"
+  formats:
+    - format: tab
+
+# all available settings of specific linters
+linters-settings:
+  exhaustive:
+    # indicates that switch statements are to be considered exhaustive if a
+    # 'default' case is present, even if all enum members aren't listed in the
+    # switch
+    default-signifies-exhaustive: true
+  gofmt:
+    rewrite-rules:
+      - pattern: 'interface{}'
+        replacement: 'any'
+  gomodguard:
+    blocked:
+      modules:
+        - github.com/pkg/errors:
+            reason: "Obsolete after the 1.13 release; use the standard `errors` package"
+  revive:
+    rules:
+      - name: duplicated-imports
+
+linters:
+  enable:
+    # mandatory linters
+    - govet
+    - revive
+
+    # some default golangci-lint linters
+    - errcheck
+    - gosimple
+    - godot
+    - ineffassign
+    - staticcheck
+    - typecheck
+    - unused
+
+    # extra linters
+    # - goconst
+    # - goerr113
+    # - gomnd
+    # - nonamedreturns
+    # - unparam
+    - bidichk
+    - bodyclose
+    - contextcheck
+    - copyloopvar
+    - decorder
+    - durationcheck
+    - errorlint
+    - exhaustive
+    - gofmt
+    - goimports
+    - gomodguard
+    - intrange
+    - misspell
+    - predeclared
+    - reassign
+    - whitespace
+  disable-all: true
+  fast: false

workflow-templates/go-linter.properties.json

@@ -0,0 +1,5 @@
+{
+    "name": "Go linter",
+    "description": "Run golangci-lint.",
+    "iconName": "octicon cpu"
+}

workflow-templates/go-linter.yml

@@ -0,0 +1,18 @@
+name: Go linter
+
+on:
+  push:
+    branches: [ $default-branch ]
+    paths-ignore:
+      - '**/*.sh'
+      - '**/*.md'
+  pull_request:
+    branches: [ $default-branch ]
+    types: [opened, synchronize]
+    paths-ignore:
+      - '**/*.sh'
+      - '**/*.md'
+
+jobs:
+  lint:
+    uses: nspcc-dev/.github/.github/workflows/go-linter.yml@master