feat(github): Extend exclusion of file extensions to github plugin

backend/plugins/github/api/blueprint_v200.go

@@ -128,13 +128,14 @@ func makeDataSourcePipelinePlanV200(
 			stage = append(stage, &coreModels.PipelineTask{
 				Plugin: "gitextractor",
 				Options: map[string]interface{}{
-					"url":          cloneUrl.String(),
-					"name":         githubRepo.FullName,
-					"fullName":     githubRepo.FullName,
-					"repoId":       didgen.NewDomainIdGenerator(&models.GithubRepo{}).Generate(connection.ID, githubRepo.GithubId),
-					"proxy":        connection.Proxy,
-					"connectionId": githubRepo.ConnectionId,
-					"pluginName":   "github",
+					"url":                   cloneUrl.String(),
+					"name":                  githubRepo.FullName,
+					"fullName":              githubRepo.FullName,
+					"repoId":                didgen.NewDomainIdGenerator(&models.GithubRepo{}).Generate(connection.ID, githubRepo.GithubId),
+					"proxy":                 connection.Proxy,
+					"connectionId":          githubRepo.ConnectionId,
+					"pluginName":            "github",
+					"excludeFileExtensions": scopeConfig.PrSizeExcludedFileExtensions,
 				},
 			})
 

backend/plugins/github/models/migrationscripts/20260216_add_pr_size_excluded_extensions.go

@@ -0,0 +1,50 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements.  See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to You under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package migrationscripts
+
+import (
+	"github.com/apache/incubator-devlake/core/context"
+	"github.com/apache/incubator-devlake/core/errors"
+	"github.com/apache/incubator-devlake/core/plugin"
+	"github.com/apache/incubator-devlake/helpers/migrationhelper"
+)
+
+var _ plugin.MigrationScript = (*addPrSizeExcludedFileExtensions)(nil)
+
+type githubScopeConfig20260216 struct {
+	PrSizeExcludedFileExtensions []string `gorm:"type:json" json:"prSizeExcludedFileExtensions" mapstructure:"prSizeExcludedFileExtensions"`
+}
+
+func (githubScopeConfig20260216) TableName() string {
+	return "_tool_github_scope_configs"
+}
+
+type addPrSizeExcludedFileExtensions struct{}
+
+func (script *addPrSizeExcludedFileExtensions) Up(basicRes context.BasicRes) errors.Error {
+	return migrationhelper.AutoMigrateTables(
+		basicRes,
+		&githubScopeConfig20260216{},
+	)
+}
+
+func (*addPrSizeExcludedFileExtensions) Version() uint64 { return 20260216100000 }
+
+func (*addPrSizeExcludedFileExtensions) Name() string {
+	return "add pr_size_excluded_file_extensions to _tool_github_scope_configs"
+}

backend/plugins/github/models/migrationscripts/register.go

@@ -57,5 +57,6 @@ func All() []plugin.MigrationScript {
 		new(addIndexToGithubJobs),
 		new(addRefreshTokenFields),
 		new(modifyTokenExpiresAtToNullable),
+		new(addPrSizeExcludedFileExtensions),
 	}
 }

backend/plugins/github/models/scope_config.go

@@ -26,20 +26,21 @@ import (
 var _ plugin.ToolLayerScopeConfig = (*GithubScopeConfig)(nil)
 
 type GithubScopeConfig struct {
-	common.ScopeConfig   `mapstructure:",squash" json:",inline" gorm:"embedded"`
-	PrType               string            `mapstructure:"prType,omitempty" json:"prType" gorm:"type:varchar(255)"`
-	PrComponent          string            `mapstructure:"prComponent,omitempty" json:"prComponent" gorm:"type:varchar(255)"`
-	PrBodyClosePattern   string            `mapstructure:"prBodyClosePattern,omitempty" json:"prBodyClosePattern" gorm:"type:varchar(255)"`
-	IssueSeverity        string            `mapstructure:"issueSeverity,omitempty" json:"issueSeverity" gorm:"type:varchar(255)"`
-	IssuePriority        string            `mapstructure:"issuePriority,omitempty" json:"issuePriority" gorm:"type:varchar(255)"`
-	IssueComponent       string            `mapstructure:"issueComponent,omitempty" json:"issueComponent" gorm:"type:varchar(255)"`
-	IssueTypeBug         string            `mapstructure:"issueTypeBug,omitempty" json:"issueTypeBug" gorm:"type:varchar(255)"`
-	IssueTypeIncident    string            `mapstructure:"issueTypeIncident,omitempty" json:"issueTypeIncident" gorm:"type:varchar(255)"`
-	IssueTypeRequirement string            `mapstructure:"issueTypeRequirement,omitempty" json:"issueTypeRequirement" gorm:"type:varchar(255)"`
-	DeploymentPattern    string            `mapstructure:"deploymentPattern,omitempty" json:"deploymentPattern" gorm:"type:varchar(255)"`
-	ProductionPattern    string            `mapstructure:"productionPattern,omitempty" json:"productionPattern" gorm:"type:varchar(255)"`
-	EnvNamePattern       string            `mapstructure:"envNamePattern,omitempty" json:"envNamePattern" gorm:"type:varchar(255)"`
-	Refdiff              datatypes.JSONMap `mapstructure:"refdiff,omitempty" json:"refdiff" swaggertype:"object" format:"json"`
+	common.ScopeConfig           `mapstructure:",squash" json:",inline" gorm:"embedded"`
+	PrType                       string            `mapstructure:"prType,omitempty" json:"prType" gorm:"type:varchar(255)"`
+	PrComponent                  string            `mapstructure:"prComponent,omitempty" json:"prComponent" gorm:"type:varchar(255)"`
+	PrBodyClosePattern           string            `mapstructure:"prBodyClosePattern,omitempty" json:"prBodyClosePattern" gorm:"type:varchar(255)"`
+	IssueSeverity                string            `mapstructure:"issueSeverity,omitempty" json:"issueSeverity" gorm:"type:varchar(255)"`
+	IssuePriority                string            `mapstructure:"issuePriority,omitempty" json:"issuePriority" gorm:"type:varchar(255)"`
+	IssueComponent               string            `mapstructure:"issueComponent,omitempty" json:"issueComponent" gorm:"type:varchar(255)"`
+	IssueTypeBug                 string            `mapstructure:"issueTypeBug,omitempty" json:"issueTypeBug" gorm:"type:varchar(255)"`
+	IssueTypeIncident            string            `mapstructure:"issueTypeIncident,omitempty" json:"issueTypeIncident" gorm:"type:varchar(255)"`
+	IssueTypeRequirement         string            `mapstructure:"issueTypeRequirement,omitempty" json:"issueTypeRequirement" gorm:"type:varchar(255)"`
+	DeploymentPattern            string            `mapstructure:"deploymentPattern,omitempty" json:"deploymentPattern" gorm:"type:varchar(255)"`
+	ProductionPattern            string            `mapstructure:"productionPattern,omitempty" json:"productionPattern" gorm:"type:varchar(255)"`
+	EnvNamePattern               string            `mapstructure:"envNamePattern,omitempty" json:"envNamePattern" gorm:"type:varchar(255)"`
+	Refdiff                      datatypes.JSONMap `mapstructure:"refdiff,omitempty" json:"refdiff" swaggertype:"object" format:"json"`
+	PrSizeExcludedFileExtensions []string          `mapstructure:"prSizeExcludedFileExtensions" json:"prSizeExcludedFileExtensions" gorm:"type:json;serializer:json"`
 }
 
 // GetConnectionId implements plugin.ToolLayerScopeConfig.

config-ui/src/plugins/register/github/config.tsx

@@ -117,6 +117,7 @@ export const GitHubConfig: IPluginConfig = {
         tagsLimit: 10,
         tagsPattern: '/v\\d+\\.\\d+(\\.\\d+(-rc)*\\d*)*$/',
       },
+      prSizeExcludedFileExtensions: [],
     },
   },
 };

config-ui/src/plugins/register/github/transformation.tsx

@@ -442,6 +442,39 @@ const renderCollapseItems = ({
             />
             for calculation
           </div>
+          <h3 style={{ marginBottom: 16, marginTop: 16 }}>
+            <span>PR Size Exclusions</span>
+          </h3>
+          <div style={{ margin: '8px 0' }}>
+            <span>Exclude file extensions (comma-separated, e.g. .md,.txt,.json)</span>
+            <Input
+              style={{ width: 360, margin: '0 8px' }}
+              placeholder=".md,.txt,.json"
+              value={(transformation.prSizeExcludedFileExtensions || []).join(',')}
+              onChange={(e) => {
+                // Don't filter during onChange to allow typing commas freely
+                const extensions = e.target.value
+                  .split(',')
+                  .map((s: string) => s.trim());
+                onChangeTransformation({
+                  ...transformation,
+                  prSizeExcludedFileExtensions: extensions,
+                });
+              }}
+              onBlur={(e) => {
+                // Clean up empty entries when user leaves the field
+                const extensions = e.target.value
+                  .split(',')
+                  .map((s: string) => s.trim())
+                  .filter((s: string) => s.length > 0);
+                onChangeTransformation({
+                  ...transformation,
+                  prSizeExcludedFileExtensions: extensions,
+                });
+              }}
+            />
+            <HelpTooltip content="These extensions are ignored when computing PR Size (additions/deletions)." />
+          </div>
         </>
       ),
     },