Tweak golangci-lint.

Author: tunabay

.ci/golangci-lint.yml

@@ -1,6 +1,6 @@
 run:
   timeout: 5m
-  tests: false
+  tests: true
   fast: false
   skip-dirs-use-default: true
   print-issued-lines: true
@@ -12,7 +12,6 @@ linters:
   enable:
     - deadcode
     - errcheck
-    - errname
     - gosimple
     - govet
     - ineffassign
@@ -21,9 +20,11 @@ linters:
     - typecheck
     - unused
     - varcheck
+
     - asciicheck
     - bodyclose
     - dogsled
+    - errname
     - errorlint
     - exportloopref
     - forbidigo
@@ -56,7 +57,40 @@ linters:
     - whitespace
     - wrapcheck
 
+linters-settings:
+  gofumpt:
+    lang-version: "1.17"
+  gosimple:
+    go: "1.17"
+  staticcheck:
+    go: "1.17"
+  stylecheck:
+    go: "1.17"
+  unused:
+    go: "1.17"
+
+  misspell:
+    locale: US
+
+  errcheck:
+    exclude-functions:
+      - io/ioutil.ReadFile
+      - io.Copy(*bytes.Buffer)
+      - io.Copy(os.Stdout)
+      - (*github.com/tunabay/go-bitarray.Builder).WriteBit
+      - (*github.com/tunabay/go-bitarray.Builder).WriteByte
+      - (*github.com/tunabay/go-bitarray.Builder).WriteBitArray
+
 issues:
-  max-issues-per-linter: 1023
-  max-same-issues: 255
+  max-issues-per-linter: 0
+  max-same-issues: 0
   fix: false
+
+  exclude-use-default: true
+  exclude-rules:
+
+    # ignore in unit tests
+    - linters: [ gosec, goerr113, ifshort ]
+      path: "_test\\.go$"
+    - linters: [ staticcheck ]
+      text: "^SA9003: empty branch"

bitarray_sha512_example_test.go

@@ -34,7 +34,7 @@ func ExampleBitArray_SHA384() {
 	// c6b08368812f4f02aaf84c1b8fcd549f53099816b212fe68cb32f6d73563fae8cec52b96051ade12ba8f3c6a6e98a616
 }
 
-func ExampleBitArray_SHA512_256() {
+func ExampleBitArray_SHA512_256() { //nolint: govet // false positive for _256 suffix
 	ba1 := bitarray.MustParse("0000")
 	ba2 := bitarray.MustParse("00000")