feat(gitlab-sim): ✨ first commit

internal/linter/dependencies.go

@@ -0,0 +1,44 @@
+package linter
+
+import (
+	"fmt"
+
+	"git.k3nny.fr/gitlab-sim/internal/model"
+)
+
+func checkDependencies(p *model.Pipeline) []Finding {
+	stageIndex := make(map[string]int, len(p.Stages))
+	for i, s := range p.Stages {
+		stageIndex[s] = i
+	}
+
+	var findings []Finding
+	for name, job := range p.Jobs {
+		if len(job.Dependencies) == 0 {
+			continue
+		}
+		jobStageIdx, jobHasStage := stageIndex[job.Stage]
+		for _, dep := range job.Dependencies {
+			depJob, exists := p.Jobs[dep]
+			if !exists {
+				findings = append(findings, Finding{
+					Severity: Error,
+					Job:      name,
+					Message:  fmt.Sprintf("'dependencies' references unknown job %q", dep),
+				})
+				continue
+			}
+			if len(p.Stages) > 0 && jobHasStage && depJob.Stage != "" {
+				depIdx, depHasStage := stageIndex[depJob.Stage]
+				if depHasStage && depIdx >= jobStageIdx {
+					findings = append(findings, Finding{
+						Severity: Error,
+						Job:      name,
+						Message:  fmt.Sprintf("'dependencies' job %q must be in an earlier stage (in %q, current job is in %q)", dep, depJob.Stage, job.Stage),
+					})
+				}
+			}
+		}
+	}
+	return findings
+}