make uniq by line configurable (#920)

.golangci.example.yml

@@ -61,6 +61,9 @@ output:
   # print linter name in the end of issue text, default is true
   print-linter-name: true
 
+  # make issues output unique by line, default is true
+  uniq-by-line: true
+
 
 # all available settings of specific linters
 linters-settings:

README.md

@@ -511,6 +511,7 @@ Flags:
       --out-format string              Format of output: colored-line-number|line-number|json|tab|checkstyle|code-climate|junit-xml (default "colored-line-number")
       --print-issued-lines             Print lines of code with issue (default true)
       --print-linter-name              Print linter name in issue line (default true)
+      --uniq-by-line                   Make issues output unique by line (default true)
       --modules-download-mode string   Modules download mode. If not empty, passed as -mod=<mode> to go tools
       --issues-exit-code int           Exit code when issues were found (default 1)
       --build-tags strings             Build tags
@@ -669,6 +670,9 @@ output:
   # print linter name in the end of issue text, default is true
   print-linter-name: true
 
+  # make issues output unique by line, default is true
+  uniq-by-line: true
+
 
 # all available settings of specific linters
 linters-settings:

pkg/commands/run.go

@@ -79,6 +79,7 @@ func initFlagSet(fs *pflag.FlagSet, cfg *config.Config, m *lintersdb.Manager, is
 		wh(fmt.Sprintf("Format of output: %s", strings.Join(config.OutFormats, "|"))))
 	fs.BoolVar(&oc.PrintIssuedLine, "print-issued-lines", true, wh("Print lines of code with issue"))
 	fs.BoolVar(&oc.PrintLinterName, "print-linter-name", true, wh("Print linter name in issue line"))
+	fs.BoolVar(&oc.UniqByLine, "uniq-by-line", true, wh("Make issues output unique by line"))
 	fs.BoolVar(&oc.PrintWelcomeMessage, "print-welcome", false, wh("Print welcome message"))
 	hideFlag("print-welcome") // no longer used
 

pkg/config/config.go

@@ -389,6 +389,7 @@ type Config struct {
 		Color               string
 		PrintIssuedLine     bool `mapstructure:"print-issued-lines"`
 		PrintLinterName     bool `mapstructure:"print-linter-name"`
+		UniqByLine          bool `mapstructure:"uniq-by-line"`
 		PrintWelcomeMessage bool `mapstructure:"print-welcome"`
 	}
 

pkg/result/processors/uniq_by_line.go

@@ -27,6 +27,10 @@ func (p UniqByLine) Name() string {
 }
 
 func (p *UniqByLine) Process(issues []result.Issue) ([]result.Issue, error) {
+	if !p.cfg.Output.UniqByLine {
+		return issues, nil
+	}
+
 	return filterIssues(issues, func(i *result.Issue) bool {
 		if i.Replacement != nil && p.cfg.Issues.NeedFix {
 			// if issue will be auto-fixed we shouldn't collapse issues:

pkg/result/processors/uniq_by_line_test.go

@@ -18,7 +18,10 @@ func newFLIssue(file string, line int) result.Issue {
 }
 
 func TestUniqByLine(t *testing.T) {
-	p := NewUniqByLine(&config.Config{})
+	cfg := config.Config{}
+	cfg.Output.UniqByLine = true
+
+	p := NewUniqByLine(&cfg)
 	i1 := newFLIssue("f1", 1)
 
 	processAssertSame(t, p, i1)
@@ -28,3 +31,14 @@ func TestUniqByLine(t *testing.T) {
 	processAssertSame(t, p, newFLIssue("f1", 2)) // another line
 	processAssertSame(t, p, newFLIssue("f2", 1)) // another file
 }
+
+func TestUniqByLineDisabled(t *testing.T) {
+	cfg := config.Config{}
+	cfg.Output.UniqByLine = false
+
+	p := NewUniqByLine(&cfg)
+	i1 := newFLIssue("f1", 1)
+
+	processAssertSame(t, p, i1)
+	processAssertSame(t, p, i1) // check the same issue passed twice
+}