feat(gitextractor): add support for excluding file extensions in commit stats

backend/plugins/gitextractor/parser/repo_gogit.go

@@ -23,6 +23,7 @@ import (
 	"encoding/hex"
 	"fmt"
 	"regexp"
+	"strings"
 
 	"github.com/apache/incubator-devlake/core/dal"
 	"github.com/apache/incubator-devlake/core/errors"
@@ -220,9 +221,6 @@ func (r *GogitRepoCollector) CollectBranches(subtaskCtx plugin.SubTaskContext) e
 		func(r *plumbing.Reference) bool {
 			return r.Name().IsBranch() || r.Name().IsRemote()
 		}, refIter)
-	if err != nil {
-		return err
-	}
 	headRef, err := r.repo.Head()
 	if err != nil {
 		return err
@@ -336,7 +334,26 @@ func (r *GogitRepoCollector) CollectCommits(subtaskCtx plugin.SubTaskContext) (e
 			if err != nil {
 				return err
 			} else {
+				excluded := map[string]struct{}{}
+				for _, ext := range taskOpts.ExcludeFileExtensions {
+					e := strings.ToLower(strings.TrimSpace(ext))
+					if e == "" {
+						continue
+					}
+					excluded[e] = struct{}{}
+				}
 				for _, stat := range stats {
+					nameLower := strings.ToLower(stat.Name)
+					skip := false
+					for ext := range excluded {
+						if strings.HasSuffix(nameLower, ext) {
+							skip = true
+							break
+						}
+					}
+					if skip {
+						continue
+					}
 					codeCommit.Additions += stat.Addition
 					// In some repos, deletion may be zero, which is different from git log --stat.
 					// It seems go-git doesn't get the correct changes.
@@ -363,7 +380,7 @@ func (r *GogitRepoCollector) CollectCommits(subtaskCtx plugin.SubTaskContext) (e
 			return err
 		}
 		if !*taskOpts.SkipCommitFiles {
-			if err := r.storeDiffCommitFilesComparedToParent(subtaskCtx, componentMap, commit); err != nil {
+			if err := r.storeDiffCommitFilesComparedToParent(subtaskCtx, componentMap, commit, taskOpts.ExcludeFileExtensions); err != nil {
 				return err
 			}
 		}
@@ -423,7 +440,7 @@ func (r *GogitRepoCollector) getCurrentAndParentTree(ctx context.Context, commit
 	return commitTree, firstParentTree, nil
 }
 
-func (r *GogitRepoCollector) storeDiffCommitFilesComparedToParent(subtaskCtx plugin.SubTaskContext, componentMap map[string]*regexp.Regexp, commit *object.Commit) (err error) {
+func (r *GogitRepoCollector) storeDiffCommitFilesComparedToParent(subtaskCtx plugin.SubTaskContext, componentMap map[string]*regexp.Regexp, commit *object.Commit, excludeExts []string) (err error) {
 	commitTree, firstParentTree, err := r.getCurrentAndParentTree(subtaskCtx.GetContext(), commit)
 	if err != nil {
 		return err
@@ -433,12 +450,34 @@ func (r *GogitRepoCollector) storeDiffCommitFilesComparedToParent(subtaskCtx plu
 	if err != nil {
 		return err
 	}
+	// normalize exclusions
+	excluded := map[string]struct{}{}
+	for _, ext := range excludeExts {
+		e := strings.ToLower(strings.TrimSpace(ext))
+		if e == "" {
+			continue
+		}
+		excluded[e] = struct{}{}
+	}
 	for _, p := range patch.Stats() {
 		commitFile := &code.CommitFile{
 			CommitSha: commit.Hash.String(),
 		}
 		fileName := p.Name
 		commitFile.FilePath = fileName
+		if len(excluded) > 0 {
+			lower := strings.ToLower(fileName)
+			skip := false
+			for ext := range excluded {
+				if strings.HasSuffix(lower, ext) {
+					skip = true
+					break
+				}
+			}
+			if skip {
+				continue
+			}
+		}
 		commitFile.Id = genCommitFileId(commitFile.CommitSha, fileName)
 		commitFile.Deletions = p.Deletion
 		commitFile.Additions = p.Addition

backend/plugins/gitextractor/parser/repo_libgit2.go

@@ -25,6 +25,7 @@ import (
 	"regexp"
 	"sort"
 	"strconv"
+	"strings"
 
 	"github.com/apache/incubator-devlake/core/dal"
 	"github.com/apache/incubator-devlake/core/errors"
@@ -317,12 +318,13 @@ func (r *Libgit2RepoCollector) CollectCommits(subtaskCtx plugin.SubTaskContext)
 
 		if !*taskOpts.SkipCommitStat {
 			var stats *git.DiffStats
-			if stats, err = r.getDiffComparedToParent(taskOpts, c.Sha, commit, parent, opts, componentMap); err != nil {
+			var addIncluded, delIncluded int
+			if stats, addIncluded, delIncluded, err = r.getDiffComparedToParent(taskOpts, c.Sha, commit, parent, opts, componentMap); err != nil {
 				return err
 			}
 			r.logger.Debug("state: %#+v\n", stats.Deletions())
-			c.Additions += stats.Insertions()
-			c.Deletions += stats.Deletions()
+			c.Additions += addIncluded
+			c.Deletions += delIncluded
 		}
 
 		err = r.store.Commits(c)
@@ -358,39 +360,83 @@ func (r *Libgit2RepoCollector) storeParentCommits(commitSha string, commit *git.
 	return r.store.CommitParents(commitParents)
 }
 
-func (r *Libgit2RepoCollector) getDiffComparedToParent(taskOpts *GitExtractorOptions, commitSha string, commit *git.Commit, parent *git.Commit, opts *git.DiffOptions, componentMap map[string]*regexp.Regexp) (*git.DiffStats, errors.Error) {
+func (r *Libgit2RepoCollector) getDiffComparedToParent(taskOpts *GitExtractorOptions, commitSha string, commit *git.Commit, parent *git.Commit, opts *git.DiffOptions, componentMap map[string]*regexp.Regexp) (*git.DiffStats, int, int, errors.Error) {
 	var err error
 	var parentTree, tree *git.Tree
 	if parent != nil {
 		parentTree, err = parent.Tree()
 	}
 	if err != nil {
-		return nil, errors.Convert(err)
+		return nil, 0, 0, errors.Convert(err)
 	}
 	tree, err = commit.Tree()
 	if err != nil {
-		return nil, errors.Convert(err)
+		return nil, 0, 0, errors.Convert(err)
 	}
 	var diff *git.Diff
 	diff, err = r.repo.DiffTreeToTree(parentTree, tree, opts)
 	if err != nil {
-		return nil, errors.Convert(err)
+		return nil, 0, 0, errors.Convert(err)
+	}
+	// build excluded extension set
+	excluded := map[string]struct{}{}
+	for _, ext := range taskOpts.ExcludeFileExtensions {
+		e := strings.ToLower(strings.TrimSpace(ext))
+		if e == "" {
+			continue
+		}
+		excluded[e] = struct{}{}
 	}
 	if !*taskOpts.SkipCommitFiles {
-		err = r.storeCommitFilesFromDiff(commitSha, diff, componentMap)
+		err = r.storeCommitFilesFromDiff(commitSha, diff, componentMap, excluded)
 		if err != nil {
-			return nil, errors.Convert(err)
+			return nil, 0, 0, errors.Convert(err)
 		}
 	}
 	var stats *git.DiffStats
 	stats, err = diff.Stats()
 	if err != nil {
-		return nil, errors.Convert(err)
-	}
-	return stats, nil
+		return nil, 0, 0, errors.Convert(err)
+	}
+	// calculate included totals with exclusions
+	addIncluded := 0
+	delIncluded := 0
+	if len(excluded) == 0 {
+		addIncluded = stats.Insertions()
+		delIncluded = stats.Deletions()
+		return stats, addIncluded, delIncluded, nil
+	}
+	_ = diff.ForEach(func(file git.DiffDelta, progress float64) (git.DiffForEachHunkCallback, error) {
+		// choose path to check based on delta status; for deletions use old path
+		pathForCheck := file.NewFile.Path
+		if file.Status == git.DeltaDeleted || pathForCheck == "" {
+			pathForCheck = file.OldFile.Path
+		}
+		lower := strings.ToLower(pathForCheck)
+		for ext := range excluded {
+			if strings.HasSuffix(lower, ext) {
+				// skip all lines for excluded files
+				return func(hunk git.DiffHunk) (git.DiffForEachLineCallback, error) {
+					return func(line git.DiffLine) error { return nil }, nil
+				}, nil
+			}
+		}
+		return func(hunk git.DiffHunk) (git.DiffForEachLineCallback, error) {
+			return func(line git.DiffLine) error {
+				if line.Origin == git.DiffLineAddition {
+					addIncluded += line.NumLines
+				}
+				if line.Origin == git.DiffLineDeletion {
+					delIncluded += line.NumLines
+				}
+				return nil
+			}, nil
+		}, nil
+	}, git.DiffDetailLines)
+	return stats, addIncluded, delIncluded, nil
 }
 
-func (r *Libgit2RepoCollector) storeCommitFilesFromDiff(commitSha string, diff *git.Diff, componentMap map[string]*regexp.Regexp) errors.Error {
+func (r *Libgit2RepoCollector) storeCommitFilesFromDiff(commitSha string, diff *git.Diff, componentMap map[string]*regexp.Regexp, excluded map[string]struct{}) errors.Error {
 	var commitFile *code.CommitFile
 	var commitFileComponent *code.CommitFileComponent
 	var err error
@@ -404,15 +450,36 @@ func (r *Libgit2RepoCollector) storeCommitFilesFromDiff(commitSha string, diff *
 			}
 		}
 
+		// skip files by extension if configured
+		if len(excluded) > 0 {
+			pathForCheck := file.NewFile.Path
+			if file.Status == git.DeltaDeleted || pathForCheck == "" {
+				pathForCheck = file.OldFile.Path
+			}
+			lower := strings.ToLower(pathForCheck)
+			for ext := range excluded {
+				if strings.HasSuffix(lower, ext) {
+					// skip this file entirely
+					return func(hunk git.DiffHunk) (git.DiffForEachLineCallback, error) {
+						return func(line git.DiffLine) error { return nil }, nil
+					}, nil
+				}
+			}
+		}
+
 		commitFile = new(code.CommitFile)
 		commitFile.CommitSha = commitSha
+		// prefer new path; for deletions fall back to old path
 		commitFile.FilePath = file.NewFile.Path
+		if commitFile.FilePath == "" {
+			commitFile.FilePath = file.OldFile.Path
+		}
 
 		// With some long path,the varchar(255) was not enough both ID and file_path
 		// So we use the hash to compress the path in ID and add length of file_path.
 		// Use commitSha and the sha256 of FilePath to create id
 		shaFilePath := sha256.New()
-		shaFilePath.Write([]byte(file.NewFile.Path))
+		shaFilePath.Write([]byte(commitFile.FilePath))
 		commitFile.Id = commitSha + ":" + hex.EncodeToString(shaFilePath.Sum(nil))
 
 		commitFileComponent = new(code.CommitFileComponent)

backend/plugins/gitextractor/parser/taskdata.go

@@ -47,4 +47,6 @@ type GitExtractorOptions struct {
 	NoShallowClone        bool   `json:"noShallowClone" mapstructure:"noShallowClone"`
 	ConnectionId          uint64 `json:"connectionId" mapstructure:"connectionId,omitempty"`
 	PluginName            string `json:"pluginName" mapstructure:"pluginName,omitempty"`
+	// Configured by upstream plugin (e.g., GitLab) to exclude file extensions from commit stats
+	ExcludeFileExtensions []string `json:"excludeFileExtensions" mapstructure:"excludeFileExtensions"`
 }

backend/plugins/gitlab/api/blueprint_v200.go

@@ -132,17 +132,22 @@ func makePipelinePlanV200(
 				return nil, err
 			}
 			cloneUrl.User = url.UserPassword("git", connection.Token)
+			gitextOpts := map[string]interface{}{
+				"url":          cloneUrl.String(),
+				"name":         gitlabProject.Name,
+				"fullName":     gitlabProject.PathWithNamespace,
+				"repoId":       didgen.NewDomainIdGenerator(&models.GitlabProject{}).Generate(connection.ID, gitlabProject.GitlabId),
+				"proxy":        connection.Proxy,
+				"connectionId": gitlabProject.ConnectionId,
+				"pluginName":   "gitlab",
+			}
+			if len(scopeConfig.PrSizeExcludedFileExtensions) > 0 {
+				// pass excluded file extensions to gitextractor to support PR Size exclusion
+				gitextOpts["excludeFileExtensions"] = scopeConfig.PrSizeExcludedFileExtensions
+			}
 			stage = append(stage, &coreModels.PipelineTask{
-				Plugin: "gitextractor",
-				Options: map[string]interface{}{
-					"url":          cloneUrl.String(),
-					"name":         gitlabProject.Name,
-					"fullName":     gitlabProject.PathWithNamespace,
-					"repoId":       didgen.NewDomainIdGenerator(&models.GitlabProject{}).Generate(connection.ID, gitlabProject.GitlabId),
-					"proxy":        connection.Proxy,
-					"connectionId": gitlabProject.ConnectionId,
-					"pluginName":   "gitlab",
-				},
+				Plugin:  "gitextractor",
+				Options: gitextOpts,
 			})
 		}
 

backend/plugins/gitlab/models/migrationscripts/20250921_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 gitlabScopeConfig20250921 struct {
+	PrSizeExcludedFileExtensions []string `gorm:"type:json" json:"prSizeExcludedFileExtensions" mapstructure:"prSizeExcludedFileExtensions"`
+}
+
+func (gitlabScopeConfig20250921) TableName() string {
+	return "_tool_gitlab_scope_configs"
+}
+
+type addPrSizeExcludedFileExtensions struct{}
+
+func (script *addPrSizeExcludedFileExtensions) Up(basicRes context.BasicRes) errors.Error {
+	return migrationhelper.AutoMigrateTables(
+		basicRes,
+		&gitlabScopeConfig20250921{},
+	)
+}
+
+func (*addPrSizeExcludedFileExtensions) Version() uint64 { return 20250921100000 }
+
+func (*addPrSizeExcludedFileExtensions) Name() string {
+	return "add pr_size_excluded_file_extensions to _tool_gitlab_scope_configs"
+}

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

@@ -52,5 +52,6 @@ func All() []plugin.MigrationScript {
 		new(addGitlabAssigneeAndReviewerPrimaryKey),
 		new(changeIssueComponentType),
 		new(addIsChildToPipelines240906),
+		new(addPrSizeExcludedFileExtensions),
 	}
 }

backend/plugins/gitlab/models/scope_config.go

@@ -37,6 +37,8 @@ type GitlabScopeConfig struct {
 	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"`
+	// A list of file extensions to exclude when calculating PR Size (affects commit additions/deletions used by dashboards)
+	PrSizeExcludedFileExtensions []string `mapstructure:"prSizeExcludedFileExtensions" json:"prSizeExcludedFileExtensions" gorm:"type:json;serializer:json"`
 }
 
 func (t GitlabScopeConfig) TableName() string {

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

@@ -78,6 +78,7 @@ export const GitLabConfig: IPluginConfig = {
       envNamePattern: '(?i)prod(.*)',
       deploymentPattern: '',
       productionPattern: '',
+      prSizeExcludedFileExtensions: [],
     },
   },
 };