feat: add DAG core functions — parse, validate, topo sort, resolve env, cron match (0007a, 0007d)

Pure functions for parsing dagu-compatible YAML, validating DAG structure, topological sorting with parallel levels (Kahn's algorithm), and env variable resolution. Also adds cron_match for schedule matching. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-04-12 13:05:05 +02:00
parent cb96e85b69
commit c3dfc9315f
21 changed files with 1569 additions and 0 deletions
@@ -0,0 +1,65 @@
+package core
+
+// DagContinueOn controls whether a step continues on failure/skip.
+type DagContinueOn struct {
+	Failure bool
+	Skipped bool
+}
+
+// DagRetryPolicy configures automatic retries for a step.
+type DagRetryPolicy struct {
+	Limit       int
+	IntervalSec int
+}
+
+// DagStep represents a single step in a DAG workflow.
+type DagStep struct {
+	Name        string
+	ID          string
+	Description string
+	Command     string
+	Script      string
+	Args        []string
+	Shell       string
+	Dir         string
+	Depends     []string
+	Env         map[string]string
+	ContinueOn  DagContinueOn
+	RetryPolicy DagRetryPolicy
+	TimeoutSec  int
+	Output      string
+	Tags        []string
+}
+
+// DagHandlers contains lifecycle handler steps.
+type DagHandlers struct {
+	Init    []DagStep
+	Success []DagStep
+	Failure []DagStep
+	Exit    []DagStep
+}
+
+// DagDefinition is a complete DAG workflow parsed from YAML.
+type DagDefinition struct {
+	Name        string
+	Description string
+	Group       string
+	Type        string // "graph" or "" (chain/sequential)
+	WorkingDir  string
+	Shell       string
+	Env         map[string]string
+	Schedule    []string
+	Steps       []DagStep
+	HandlerOn   DagHandlers
+	Tags        []string
+	TimeoutSec  int
+	FilePath    string
+}
+
+// DagValidationResult contains validation output.
+type DagValidationResult struct {
+	Valid    bool
+	Errors   []string
+	Warnings []string
+	Levels   [][]string // topological levels (step names/IDs)
+}