feat: Add new type condition

By setting the type attribute in the label configuration, the user can specify whether a rule applies exclusively to Pull Requests (PRs) or Issues. This functionality increases the adaptability of this GitHub Action, allowing users to create more tailored labeling strategies that differentiate between PRs and Issues or apply universally to both.

Author: philippwaller

README.md

@@ -18,6 +18,7 @@ configurable matching rules. Available conditions:
 * [Mergeable](#mergeable): label based on whether the PR is mergeable
 * [Size](#size): label based on the PR size
 * [Title](#title): label based on the PR/Issue title
+* [Type](#type): label based on record type (PR or Issue)
 
 ## Sponsors
 
@@ -480,3 +481,34 @@ This condition is satisfied when the title matches on the given regex.
 ```yaml
 title: "^WIP:.*"
 ```
+
+### Type <a name="type" />
+
+By setting the type attribute in your label configuration, you can specify whether a rule applies exclusively to Pull
+Requests (PRs) or Issues. This allows for more precise label management based on the type of GitHub record. The
+type condition accepts one of two values:
+
+- `pull_request`
+- `issue`
+
+This functionality increases the adaptability of this GitHub Action, allowing users to create more tailored labeling
+strategies that differentiate between PRs and Issues or apply universally to both.
+
+#### Pull-Request Only:
+
+```yaml
+- label: "needs review"
+  type: "pull_request"
+  name: ".*bug.*"
+```
+This rule applies the label "needs review" to Pull Requests with "bug" in the title.
+
+### Issue Only:
+
+```yaml
+- label: "needs triage"
+  type: "issue"
+  name: ".*bug.*"
+```
+
+This rule applies the label "needs triage" to Issues with "bug" in the title.

cmd/action_test.go

@@ -264,6 +264,14 @@ func TestGetLabelerConfig2V1(t *testing.T) {
 			Label: "TestFileMatch",
 			Files: []string{"cmd\\/.*.go", "pkg\\/.*.go"},
 		},
+		"TestTypePullRequest": {
+			Label: "TestTypePullRequest",
+			Type:  "pull_request",
+		},
+		"TestTypeIssue": {
+			Label: "TestTypeIssue",
+			Type:  "issue",
+		},
 	}
 
 	if !cmp.Equal(len(expectMatchers), len(c.Labels)) {

pkg/condition_type.go

@@ -0,0 +1,36 @@
+package labeler
+
+import (
+	"fmt"
+	"log"
+)
+
+func TypeCondition() Condition {
+	return Condition{
+		GetName: func() string {
+			return "Target type matches defined type"
+		},
+		CanEvaluate: func(target *Target) bool {
+			return true
+		},
+		Evaluate: func(target *Target, matcher LabelMatcher) (bool, error) {
+			if len(matcher.Type) <= 0 {
+				return false, fmt.Errorf("type is not set in config")
+			} else if matcher.Type != "pull_request" && matcher.Type != "issue" {
+				return false, fmt.Errorf("type musst be of value 'pull_request' or 'issue'")
+			}
+
+			var targetType string
+			if target.ghPR != nil {
+				targetType = "pull_request"
+			} else if target.ghIssue != nil {
+				targetType = "issue"
+			} else {
+				return false, fmt.Errorf("target is neither pull_request nor issue")
+			}
+
+			log.Printf("Matching `%s` against: `%s`", matcher.Type, targetType)
+			return matcher.Type == targetType || matcher.Type == "all", nil
+		},
+	}
+}

pkg/labeler.go

@@ -35,6 +35,7 @@ type LabelMatcher struct {
 	SizeBelow string `yaml:"size-below"`
 	// size-legacy
 	Title string
+	Type  string
 }
 
 type LabelerConfigV0 map[string]LabelMatcher
@@ -226,6 +227,7 @@ func (l *Labeler) findMatches(target *Target, config *LabelerConfigV1) (LabelUpd
 		IsMergeableCondition(),
 		SizeCondition(l),
 		TitleCondition(),
+		TypeCondition(),
 	}
 
 	for _, matcher := range config.Labels {

pkg/labeler_test.go

@@ -807,6 +807,70 @@ func TestHandleEvent(t *testing.T) {
 			initialLabels:  []string{"Test", "WIP"},
 			expectedLabels: []string{"Test", "WIP"},
 		},
+		{
+			event:    "issues",
+			payloads: []string{"issue_open"},
+			name:     "Add a label to issue when type matches (issues neq pull_request)",
+			config: LabelerConfigV1{
+				Version: 1,
+				Labels: []LabelMatcher{
+					{
+						Label: "Test",
+						Type:  "pull_request",
+					},
+				},
+			},
+			initialLabels:  []string{"Meh"},
+			expectedLabels: []string{"Meh"},
+		},
+		{
+			event:    "pull_request",
+			payloads: []string{"create_pr"},
+			name:     "Add a label to pull request when type matches (pull_request neq issue)",
+			config: LabelerConfigV1{
+				Version: 1,
+				Labels: []LabelMatcher{
+					{
+						Label: "Test",
+						Type:  "issue",
+					},
+				},
+			},
+			initialLabels:  []string{"Meh"},
+			expectedLabels: []string{"Meh"},
+		},
+		{
+			event:    "issues",
+			payloads: []string{"issue_open"},
+			name:     "Add a label to issue when type matches (issues eq issue)",
+			config: LabelerConfigV1{
+				Version: 1,
+				Labels: []LabelMatcher{
+					{
+						Label: "Test",
+						Type:  "issue",
+					},
+				},
+			},
+			initialLabels:  []string{"Meh"},
+			expectedLabels: []string{"Meh", "Test"},
+		},
+		{
+			event:    "pull_request",
+			payloads: []string{"create_pr"},
+			name:     "Add a label to pull request when type matches (pull_request eq pull_request)",
+			config: LabelerConfigV1{
+				Version: 1,
+				Labels: []LabelMatcher{
+					{
+						Label: "Test",
+						Type:  "pull_request",
+					},
+				},
+			},
+			initialLabels:  []string{"Meh"},
+			expectedLabels: []string{"Meh", "Test"},
+		},
 	}
 
 	for _, tc := range testCases {

test_data/config2_v1.yml

@@ -7,3 +7,7 @@ labels:
     files: 
     - "cmd\\/.*.go"
     - "pkg\\/.*.go"
+  - label: "TestTypePullRequest"
+    type: "pull_request"
+  - label: "TestTypeIssue"
+    type: "issue"