Add cron feature (#934)

https://woodpecker-ci.org/docs/usage/cron

Co-authored-by: Anbraten <anton@ju60.de>
Co-authored-by: qwerty287 <80460567+qwerty287@users.noreply.github.com>

pipeline/frontend/metadata.go

@@ -14,6 +14,7 @@ const (
 	EventPull   = "pull_request"
 	EventTag    = "tag"
 	EventDeploy = "deployment"
+	EventCron   = "cron"
 )
 
 type (
@@ -51,6 +52,7 @@ type (
 		Trusted  bool   `json:"trusted,omitempty"`
 		Commit   Commit `json:"commit,omitempty"`
 		Parent   int64  `json:"parent,omitempty"`
+		Cron     string `json:"cron,omitempty"`
 	}
 
 	// Commit defines runtime metadata for a commit.

pipeline/frontend/yaml/constraint/constraint.go

@@ -26,6 +26,7 @@ type (
 		Environment List
 		Event       List
 		Branch      List
+		Cron        List
 		Status      List
 		Matrix      Map
 		Local       types.BoolTrue
@@ -153,6 +154,10 @@ func (c *Constraint) Match(metadata frontend.Metadata) bool {
 		match = match && c.Branch.Match(metadata.Curr.Commit.Branch)
 	}
 
+	if metadata.Curr.Event == frontend.EventCron {
+		match = match && c.Cron.Match(metadata.Curr.Cron)
+	}
+
 	return match
 }
 

pipeline/frontend/yaml/constraint/constraint_test.go

@@ -459,7 +459,25 @@ func TestConstraints(t *testing.T) {
 			want: false,
 		},
 		{
-			desc: "no constraints, and event get filtered by default default event filter",
+			desc: "filter cron by default constraint",
+			conf: "{}",
+			with: frontend.Metadata{Curr: frontend.Build{Event: frontend.EventCron}},
+			want: false,
+		},
+		{
+			desc: "filter cron by matching name",
+			conf: "{ event: cron, cron: job1 }",
+			with: frontend.Metadata{Curr: frontend.Build{Event: frontend.EventCron, Cron: "job1"}},
+			want: true,
+		},
+		{
+			desc: "filter cron by name",
+			conf: "{ event: cron, cron: job2 }",
+			with: frontend.Metadata{Curr: frontend.Build{Event: frontend.EventCron, Cron: "job1"}},
+			want: false,
+		},
+		{
+			desc: "no constraints, event gets filtered by default event filter",
 			conf: "",
 			with: frontend.Metadata{
 				Curr: frontend.Build{Event: "non-default"},
@@ -467,6 +485,7 @@ func TestConstraints(t *testing.T) {
 			want: false,
 		},
 	}
+
 	for _, test := range testdata {
 		t.Run(test.desc, func(t *testing.T) {
 			c := parseConstraints(t, test.conf)

pipeline/frontend/yaml/container_test.go

@@ -58,7 +58,9 @@ volumes:
 tmpfs:
   - /var/lib/test
 when:
-  branch: master
+  - branch: master
+  - event: cron
+    cron: job1
 settings:
   foo: bar
   baz: false
@@ -116,6 +118,14 @@ func TestUnmarshalContainer(t *testing.T) {
 						Include: []string{"master"},
 					},
 				},
+				{
+					Event: constraint.List{
+						Include: []string{"cron"},
+					},
+					Cron: constraint.List{
+						Include: []string{"job1"},
+					},
+				},
 			},
 		},
 		Settings: map[string]interface{}{