Add default event filter (#1140)

breakout from #934

when new events are added you don't have to worry that pipeline will behave different as it does now with this

Co-authored-by: Anbraten <anton@ju60.de>

Makefile

@@ -52,6 +52,7 @@ else
 
 all: build
 
+.PHONY: vendor
 vendor:
 	go mod tidy
 	go mod vendor

docs/docs/20-usage/20-pipeline-syntax.md

@@ -100,7 +100,7 @@ pipeline:
 
 Woodpecker gives the ability to skip individual commits by adding `[CI SKIP]` to the commit message. Note this is case-insensitive.
 
-```diff
+```sh
 git commit -m "updated README [CI SKIP]"
 ```
 
@@ -234,7 +234,7 @@ Commands of every pipeline step are executed serially as if you would enter them
 
 There is no magic here. The above commands are converted to a simple shell script. The commands in the above example are roughly converted to the below script:
 
-```diff
+```sh
 #!/bin/sh
 set -e
 
@@ -244,7 +244,7 @@ go test
 
 The above shell script is then executed as the container entrypoint. The below docker command is an (incomplete) example of how the script is executed:
 
-```bash
+```sh
 docker run --entrypoint=build.sh golang
 ```
 
@@ -315,21 +315,21 @@ pipeline:
 
 Execute a step if the branch is `master` or `develop`:
 
-```diff
+```yaml
 when:
   - branch: [master, develop]
 ```
 
 Execute a step if the branch starts with `prefix/*`:
 
-```diff
+```yaml
 when:
   - branch: prefix/*
 ```
 
 Execute a step using custom include and exclude logic:
 
-```diff
+```yaml
 when:
   - branch:
       include: [ master, release/* ]
@@ -338,9 +338,17 @@ when:
 
 #### `event`
 
+:::info
+**By default steps are filtered by following event types:**
+
+`push`, `pull_request, `tag`, `deployment`.
+:::
+
+Available events: `push`, `pull_request`, `tag`, `deployment`
+
 Execute a step if the build event is a `tag`:
 
-```diff
+```yaml
 when:
   - event: tag
 ```
@@ -353,26 +361,19 @@ when:
 +   branch: main
 ```
 
-Execute a step for all non-pull request events:
+Execute a step for multiple events:
 
-```diff
+```yaml
 when:
   - event: [push, tag, deployment]
 ```
 
-Execute a step for all build events:
-
-```diff
-when:
-  - event: [push, pull_request, tag, deployment]
-```
-
 #### `tag`
 
 This filter only applies to tag events.
 Use glob expression to execute a step if the tag name starts with `v`:
 
-```diff
+```yaml
 when:
   - event: tag
     tag: v*
@@ -400,14 +401,14 @@ This condition should be used in conjunction with a [matrix](/docs/usage/matrix-
 
 Execute a step for a specific platform:
 
-```diff
+```yaml
 when:
   - platform: linux/amd64
 ```
 
 Execute a step for a specific platform using wildcards:
 
-```diff
+```yaml
 when:
   - platform:  [ linux/*, windows/amd64 ]
 ```
@@ -416,7 +417,7 @@ when:
 
 Execute a step for deployment events matching the target deployment environment:
 
-```diff
+```yaml
 when:
   - environment: production
   - event: deployment
@@ -426,7 +427,7 @@ when:
 
 Execute a step for a single matrix permutation:
 
-```diff
+```yaml
 when:
   - matrix:
       GO_VERSION: 1.5
@@ -437,7 +438,7 @@ when:
 
 Execute a step only on a certain Woodpecker instance matching the specified hostname:
 
-```diff
+```yaml
 when:
   - instance: stage.woodpecker.company.com
 ```
@@ -452,14 +453,14 @@ Gitea only support **push** at the moment ([go-gitea/gitea#18228](https://github
 
 Execute a step only on a pipeline with certain files being changed:
 
-```diff
+```yaml
 when:
   - path: "src/*"
 ```
 
 You can use [glob patterns](https://github.com/bmatcuk/doublestar#patterns) to match the changed files and specify if the step should run if a file matching that pattern has been changed `include` or if some files have **not** been changed `exclude`.
 
-```diff
+```yaml
 when:
   - path:
       include: [ '.woodpecker/*.yml', '*.ini' ]
@@ -559,7 +560,7 @@ The base attribute defines a shared base volume available to all pipeline steps.
 
 This would be equivalent to the following docker commands:
 
-```bash
+```sh
 docker volume create my-named-volume
 
 docker run --volume=my-named-volume:/go golang:latest

pipeline/frontend/yaml/constraint/constraint.go

@@ -63,7 +63,13 @@ func (when *When) Match(metadata frontend.Metadata) bool {
 			return true
 		}
 	}
-	return when.IsEmpty()
+
+	if when.IsEmpty() {
+		// test against default Constraints
+		empty := &Constraint{}
+		return empty.Match(metadata)
+	}
+	return false
 }
 
 func (when *When) IncludesStatus(status string) bool {
@@ -120,6 +126,16 @@ func (when *When) UnmarshalYAML(value *yaml.Node) error {
 // Match returns true if all constraints match the given input. If a single
 // constraint fails a false value is returned.
 func (c *Constraint) Match(metadata frontend.Metadata) bool {
+	// if event filter is not set, set default
+	if c.Event.IsEmpty() {
+		c.Event.Include = []string{
+			frontend.EventPush,
+			frontend.EventPull,
+			frontend.EventTag,
+			frontend.EventDeploy,
+		}
+	}
+
 	match := c.Platform.Match(metadata.Sys.Platform) &&
 		c.Environment.Match(metadata.Curr.Target) &&
 		c.Event.Match(metadata.Curr.Event) &&
@@ -140,6 +156,11 @@ func (c *Constraint) Match(metadata frontend.Metadata) bool {
 	return match
 }
 
+// IsEmpty return true if a constraint has no conditions
+func (c List) IsEmpty() bool {
+	return len(c.Include) == 0 && len(c.Exclude) == 0
+}
+
 // Match returns true if the string matches the include patterns and does not
 // match any of the exclude patterns.
 func (c *List) Match(v string) bool {

pipeline/frontend/yaml/constraint/constraint_test.go

@@ -383,89 +383,98 @@ func TestConstraintMap(t *testing.T) {
 
 func TestConstraints(t *testing.T) {
 	testdata := []struct {
+		desc string
 		conf string
 		with frontend.Metadata
 		want bool
 	}{
-		// no constraints, must match
 		{
+			desc: "no constraints, must match on default events",
 			conf: "",
-			with: frontend.Metadata{},
+			with: frontend.Metadata{
+				Curr: frontend.Build{
+					Event: frontend.EventPush,
+				},
+			},
 			want: true,
 		},
-		// branch constraint
 		{
+			desc: "global branch filter",
 			conf: "{ branch: develop }",
-			with: frontend.Metadata{Curr: frontend.Build{Commit: frontend.Commit{Branch: "master"}}},
+			with: frontend.Metadata{Curr: frontend.Build{Event: frontend.EventPush, Commit: frontend.Commit{Branch: "master"}}},
 			want: false,
 		},
 		{
+			desc: "global branch filter",
 			conf: "{ branch: master }",
-			with: frontend.Metadata{Curr: frontend.Build{Commit: frontend.Commit{Branch: "master"}}},
+			with: frontend.Metadata{Curr: frontend.Build{Event: frontend.EventPush, Commit: frontend.Commit{Branch: "master"}}},
 			want: true,
 		},
-		// environment constraint
-		{
-			conf: "{ branch: develop }",
-			with: frontend.Metadata{Curr: frontend.Build{Commit: frontend.Commit{Branch: "master"}}},
-			want: false,
-		},
-		{
-			conf: "{ branch: master }",
-			with: frontend.Metadata{Curr: frontend.Build{Commit: frontend.Commit{Branch: "master"}}},
-			want: true,
-		},
-		// repo constraint
 		{
+			desc: "repo constraint",
 			conf: "{ repo: owner/* }",
-			with: frontend.Metadata{Repo: frontend.Repo{Name: "owner/repo"}},
+			with: frontend.Metadata{Curr: frontend.Build{Event: frontend.EventPush}, Repo: frontend.Repo{Name: "owner/repo"}},
 			want: true,
 		},
 		{
+			desc: "repo constraint",
 			conf: "{ repo: octocat/* }",
-			with: frontend.Metadata{Repo: frontend.Repo{Name: "owner/repo"}},
+			with: frontend.Metadata{Curr: frontend.Build{Event: frontend.EventPush}, Repo: frontend.Repo{Name: "owner/repo"}},
 			want: false,
 		},
-		// ref constraint
 		{
+			desc: "ref constraint",
 			conf: "{ ref: refs/tags/* }",
-			with: frontend.Metadata{Curr: frontend.Build{Commit: frontend.Commit{Ref: "refs/tags/v1.0.0"}}},
+			with: frontend.Metadata{Curr: frontend.Build{Commit: frontend.Commit{Ref: "refs/tags/v1.0.0"}, Event: frontend.EventPush}},
 			want: true,
 		},
 		{
+			desc: "ref constraint",
 			conf: "{ ref: refs/tags/* }",
-			with: frontend.Metadata{Curr: frontend.Build{Commit: frontend.Commit{Ref: "refs/heads/master"}}},
+			with: frontend.Metadata{Curr: frontend.Build{Commit: frontend.Commit{Ref: "refs/heads/master"}, Event: frontend.EventPush}},
 			want: false,
 		},
-		// platform constraint
 		{
+			desc: "platform constraint",
 			conf: "{ platform: linux/amd64 }",
-			with: frontend.Metadata{Sys: frontend.System{Platform: "linux/amd64"}},
+			with: frontend.Metadata{Curr: frontend.Build{Event: frontend.EventPush}, Sys: frontend.System{Platform: "linux/amd64"}},
 			want: true,
 		},
 		{
+			desc: "platform constraint",
 			conf: "{ repo: linux/amd64 }",
-			with: frontend.Metadata{Sys: frontend.System{Platform: "windows/amd64"}},
+			with: frontend.Metadata{Curr: frontend.Build{Event: frontend.EventPush}, Sys: frontend.System{Platform: "windows/amd64"}},
 			want: false,
 		},
-		// instance constraint
 		{
+			desc: "instance constraint",
 			conf: "{ instance: agent.tld }",
-			with: frontend.Metadata{Sys: frontend.System{Host: "agent.tld"}},
+			with: frontend.Metadata{Curr: frontend.Build{Event: frontend.EventPush}, Sys: frontend.System{Host: "agent.tld"}},
 			want: true,
 		},
 		{
+			desc: "instance constraint",
 			conf: "{ instance: agent.tld }",
-			with: frontend.Metadata{Sys: frontend.System{Host: "beta.agent.tld"}},
+			with: frontend.Metadata{Curr: frontend.Build{Event: frontend.EventPush}, Sys: frontend.System{Host: "beta.agent.tld"}},
+			want: false,
+		},
+		{
+			desc: "no constraints, and event get filtered by default default event filter",
+			conf: "",
+			with: frontend.Metadata{
+				Curr: frontend.Build{Event: "non-default"},
+			},
 			want: false,
 		},
 	}
 	for _, test := range testdata {
+		t.Run(test.desc, func(t *testing.T) {
 			c := parseConstraints(t, test.conf)
 			got, want := c.Match(test.with), test.want
 			if got != want {
 				t.Errorf("Expect %+v matches %q is %v", test.with, test.conf, want)
 			}
+		})
 	}
 }
 

pipeline/schema/schema.json

@@ -186,13 +186,11 @@
           "oneOf": [
             {
               "type": "array",
-              "items": {
-                "enum": ["push", "pull_request", "tag", "deployment"]
-              },
-              "minLength": 1
+              "minLength": 1,
+              "items": { "$ref": "#/definitions/event_enum" }
             },
             {
-              "enum": ["push", "pull_request", "tag", "deployment"]
+              "$ref": "#/definitions/event_enum"
             }
           ]
         },
@@ -270,6 +268,10 @@
         }
       }
     },
+    "event_enum": {
+      "default": ["push", "pull_request", "tag", "deployment"],
+      "enum": ["push", "pull_request", "tag", "deployment"]
+    },
     "step_image": {
       "description": "Read more: https://woodpecker-ci.org/docs/usage/pipeline-syntax#image",
       "type": "string"

server/shared/procBuilder_test.go

@@ -465,7 +465,9 @@ depends_on: [ shouldbefiltered ]
 func TestTree(t *testing.T) {
 	t.Parallel()
 
-	build := &model.Build{}
+	build := &model.Build{
+		Event: model.EventPush,
+	}
 
 	b := ProcBuilder{
 		Repo:  &model.Repo{},