Propagate error when linter cannot be run

We now return an error if any linter is unable to run to
not exit on 0 in that case.

Closes #451

Signed-off-by: Sascha Grunert <sgrunert@suse.com>

Author: saschagrunert

pkg/commands/run.go

@@ -315,7 +315,11 @@ func (e *Executor) runAnalysis(ctx context.Context, args []string) ([]result.Iss
 		return nil, err
 	}
 
-	issues := runner.Run(ctx, enabledLinters, lintCtx)
+	issues, err := runner.Run(ctx, enabledLinters, lintCtx)
+	if err != nil {
+		return nil, err
+	}
+
 	fixer := processors.NewFixer(e.cfg, e.log, e.fileCache)
 	return fixer.Process(issues), nil
 }

pkg/lint/runner.go

@@ -175,24 +175,26 @@ func (r Runner) printPerProcessorStat(stat map[string]processorStat) {
 	}
 }
 
-func (r Runner) Run(ctx context.Context, linters []*linter.Config, lintCtx *linter.Context) []result.Issue {
+func (r Runner) Run(ctx context.Context, linters []*linter.Config, lintCtx *linter.Context) ([]result.Issue, error) {
 	sw := timeutils.NewStopwatch("linters", r.Log)
 	defer sw.Print()
 
 	var issues []result.Issue
+	var runErr error
 	for _, lc := range linters {
 		lc := lc
 		sw.TrackStage(lc.Name(), func() {
 			linterIssues, err := r.runLinterSafe(ctx, lintCtx, lc)
 			if err != nil {
 				r.Log.Warnf("Can't run linter %s: %s", lc.Linter.Name(), err)
+				runErr = err
 				return
 			}
 			issues = append(issues, linterIssues...)
 		})
 	}
 
-	return r.processLintResults(issues)
+	return r.processLintResults(issues), runErr
 }
 
 func (r *Runner) processIssues(issues []result.Issue, sw *timeutils.Stopwatch, statPerProcessor map[string]processorStat) []result.Issue {