chore: add golangci-lint

.github/workflows/golangci-lint.yml

@@ -0,0 +1,25 @@
+name: golangci-lint
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  golangci:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-go@v4
+        with:
+          go-version: "1.20"
+          cache: false
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v3
+        with:
+          version: v1.53
+          args: --issues-exit-code 0 --print-issued-lines=false --out-format code-climate:gl-code-quality-report.json,line-number

.golangci.yml

@@ -0,0 +1,232 @@
+output:
+  # colored-line-number|line-number|json|tab|checkstyle|code-climate, default is "colored-line-number"
+  format: colored-line-number
+
+# all available settings of specific linters
+linters-settings:
+  errcheck:
+    check-type-assertions: false
+    check-blank: false
+
+  # Disable error checking, as errorcheck detects more errors and is more configurable.
+  # See https://github.com/securego/gosec#available-rules
+  gosec:
+    exclude:
+      - G104
+
+  funlen:
+    lines: 60
+    statements: 40
+
+  govet:
+    # report about shadowed variables
+    check-shadowing: true
+
+    # settings per analyzer
+    settings:
+      printf: # analyzer name, run `go tool vet help` to see all analyzers
+        funcs: # run `go tool vet help printf` to see available settings for `printf` analyzer
+          - (github.com/golangci/golangci-lint/pkg/logutils.Log).Infof
+          - (github.com/golangci/golangci-lint/pkg/logutils.Log).Warnf
+          - (github.com/golangci/golangci-lint/pkg/logutils.Log).Errorf
+          - (github.com/golangci/golangci-lint/pkg/logutils.Log).Fatalf
+
+  gofmt:
+    # simplify code: gofmt with `-s` option, true by default
+    simplify: true
+
+  goimports:
+    # put imports beginning with prefix after 3rd-party packages;
+    # it's a comma-separated list of prefixes
+    # local-prefixes: github.com/org/project
+
+  gocognit:
+    # minimal code complexity to report, 30 by default (but we recommend 10-20)
+    min-complexity: 20
+
+  # See https://github.com/mibk/dupl
+  dupl:
+    # tokens count to trigger issue, 150 by default
+    threshold: 100
+
+  goconst:
+    # minimal length of string constant, 3 by default
+    min-len: 3
+    # minimal occurrences count to trigger, 3 by default
+    min-occurrences: 3
+
+  misspell:
+    # Correct spellings using locale preferences for US or UK.
+    # Default is to use a neutral variety of English.
+    # Setting locale to US will correct the British spelling of 'colour' to 'color'.
+    locale: US
+    ignore-words:
+      - GitLab
+
+  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
+
+  revive:
+    ignore-generated-header: true
+
+  prealloc:
+    # XXX: we don't recommend using this linter before doing performance profiling.
+    # For most programs usage of prealloc will be a premature optimization.
+
+    # Report preallocation suggestions only on simple loops that have no returns/breaks/continues/gotos in them.
+    # True by default.
+    simple: true
+    range-loops: true # Report preallocation suggestions on range loops, true by default
+    for-loops: false # Report preallocation suggestions on for loops, false by default
+
+  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
+    disabled-tags:
+      - experimental
+
+    # Settings passed to gocritic.
+    # The settings key is the name of a supported gocritic checker.
+    # The list of supported checkers can be find in https://go-critic.github.io/overview.
+    settings:
+      captLocal: # must be valid enabled check name
+        # whether to restrict checker to params only (default true)
+        paramsOnly: true
+      elseif:
+        # whether to skip balanced if-else pairs (default true)
+        skipBalanced: true
+    # rangeValCopy:
+    #   sizeThreshold: 32
+
+  godox:
+    # report any comments starting with keywords, this is useful for TODO or FIXME comments that
+    # might be left in the code accidentally and should be resolved before merging
+    keywords: # default keywords are TODO, BUG, and FIXME, these can be overwritten by this setting
+      - TODO
+      - BUG
+      - FIXME
+      - NOTE
+      - OPTIMIZE # marks code that should be optimized before merging
+      - HACK # marks hack-arounds that should be removed before merging
+
+  dogsled:
+    # checks assignments with too many blank identifiers; default is 2
+    max-blank-identifiers: 2
+
+  whitespace:
+    multi-if: true # Enforces newlines (or comments) after every multi-line if statement
+    multi-func: true # Enforces newlines (or comments) after every multi-line function signature
+
+  wsl:
+    # If true append is only allowed to be cuddled if appending value is
+    # matching variables, fields or types on line above. Default is true.
+    strict-append: true
+    # Allow calls and assignments to be cuddled as long as the lines have any
+    # matching variables, fields or types. Default is true.
+    allow-assign-and-call: true
+    # Allow multiline assignments to be cuddled. Default is true.
+    allow-multiline-assign: true
+    # Allow multiple comments in the beginning of a block separated with newline.
+    allow-separated-leading-comment: false
+    # Allow declarations (var) to be cuddled.
+    allow-cuddle-declarations: false
+    # Allow trailing comments in ending of blocks
+    allow-trailing-comment: false
+    # Force newlines in end of case at this limit (0 = never).
+    force-case-trailing-whitespace: 0
+
+  gci:
+    sections:
+      - standard
+      - blank
+      - prefix(cypt) # this module name
+      - blank
+      - default
+    # If `true`, make the section order the same as the order of `sections`.
+    # Default: false
+    custom-order: true
+
+# See https://golangci-lint.run/usage/linters/
+linters:
+  # Disable all linters.
+  # Default: false
+  disable-all: true
+  # Enable specific linter
+  # https://golangci-lint.run/usage/linters/#enabled-by-default
+  enable:
+    - bodyclose
+    - dogsled
+    - dupl
+    - errcheck
+    - exhaustive
+    - exportloopref
+    - forbidigo
+    - funlen
+    - gci
+    - gocognit
+    - goconst
+    - gocritic
+    - godox
+    - gofmt
+    - goimports
+    - gosec
+    - gosimple
+    - govet
+    - ineffassign
+    - misspell
+    - nakedret
+    - prealloc
+    - revive
+    - staticcheck
+    - stylecheck
+    - typecheck
+    - unconvert
+    - unparam
+    - unused
+    - whitespace
+    - wsl
+
+issues:
+  exclude-rules:
+    - path: _test\.go
+      linters:
+        - gocognit
+        - errcheck
+        - dupl
+        - gosec
+        - funlen
+    - linters:
+        - lll
+      source: "^//go:generate "
+  exclude-use-default: false
+  max-issues-per-linter: 0
+  max-same-issues: 0
+  new: false

.vscode/settings.json

@@ -0,0 +1,6 @@
+{
+    "go.lintTool": "golangci-lint",
+    "go.lintFlags": [
+        "--fast"
+    ],
+}

Makefile

@@ -2,14 +2,20 @@
 
 BIN=cypt
 
-all: check build
+all: lint check build
 
 build:
 	go build -o "${BIN}"
 
 test:
 	go test ./...
 
+lint-install:
+	go install github.com/golangci/golangci-lint/cmd/golangci-lint@latest
+
+lint:
+	golangci-lint run -v
+
 check:
 	go fmt ./...
 	go vet ./...