Improve grep search (#30843) (#30850)

Backport #30843 by wxiaoguang

Reduce the context line number to 1, make "git grep" search respect the
include/exclude patter, and fix #30785

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

2 files changed, 37 insertions, 7 deletions

diff --git a/modules/setting/glob.go b/modules/setting/glob.go
new file mode 100644
index 0000000000..8f1d24dea4
--- /dev/null
+++ b/modules/setting/glob.go
@@ -0,0 +1,32 @@
+// Copyright 2024 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package setting
+
+import "github.com/gobwas/glob"
+
+type GlobMatcher struct {
+	compiledGlob  glob.Glob
+	patternString string
+}
+
+var _ glob.Glob = (*GlobMatcher)(nil)
+
+func (g *GlobMatcher) Match(s string) bool {
+	return g.compiledGlob.Match(s)
+}
+
+func (g *GlobMatcher) PatternString() string {
+	return g.patternString
+}
+
+func GlobMatcherCompile(pattern string, separators ...rune) (*GlobMatcher, error) {
+	g, err := glob.Compile(pattern, separators...)
+	if err != nil {
+		return nil, err
+	}
+	return &GlobMatcher{
+		compiledGlob:  g,
+		patternString: pattern,
+	}, nil
+}
diff --git a/modules/setting/indexer.go b/modules/setting/indexer.go
index 6877d70e3c..18585602c3 100644
--- a/modules/setting/indexer.go
+++ b/modules/setting/indexer.go
@@ -10,8 +10,6 @@ import (
 	"time"
 
 	"code.gitea.io/gitea/modules/log"
-
-	"github.com/gobwas/glob"
 )
 
 // Indexer settings
@@ -30,8 +28,8 @@ var Indexer = struct {
 	RepoConnStr          string
 	RepoIndexerName      string
 	MaxIndexerFileSize   int64
-	IncludePatterns      []glob.Glob
-	ExcludePatterns      []glob.Glob
+	IncludePatterns      []*GlobMatcher
+	ExcludePatterns      []*GlobMatcher
 	ExcludeVendored      bool
 }{
 	IssueType:        "bleve",
@@ -93,12 +91,12 @@ func loadIndexerFrom(rootCfg ConfigProvider) {
 }
 
 // IndexerGlobFromString parses a comma separated list of patterns and returns a glob.Glob slice suited for repo indexing
-func IndexerGlobFromString(globstr string) []glob.Glob {
-	extarr := make([]glob.Glob, 0, 10)
+func IndexerGlobFromString(globstr string) []*GlobMatcher {
+	extarr := make([]*GlobMatcher, 0, 10)
 	for _, expr := range strings.Split(strings.ToLower(globstr), ",") {
 		expr = strings.TrimSpace(expr)
 		if expr != "" {
-			if g, err := glob.Compile(expr, '.', '/'); err != nil {
+			if g, err := GlobMatcherCompile(expr, '.', '/'); err != nil {
 				log.Info("Invalid glob expression '%s' (skipped): %v", expr, err)
 			} else {
 				extarr = append(extarr, g)