perf: replace goheader linter with custom check

.golangci.yml

@@ -13,7 +13,6 @@ linters:
     - forbidigo
     - gocheckcompilerdirectives
     - gocritic
-    - goheader
     - govet
     - ineffassign
     - mirror

Makefile

@@ -332,11 +332,15 @@ lint-spell-fix: ## lint spelling and fix issues
 
 .PHONY: lint-go
 lint-go: ## lint go files
-	$(GO) run $(GOLANGCI_LINT_PACKAGE) run
+	@$(GO) run tools/lint-go-header.go; header=$$?; \
+	$(GO) run $(GOLANGCI_LINT_PACKAGE) run; lint=$$?; \
+	exit $$((lint ? lint : header))
 
 .PHONY: lint-go-fix
 lint-go-fix: ## lint go files and fix issues
-	$(GO) run $(GOLANGCI_LINT_PACKAGE) run --fix
+	@$(GO) run tools/lint-go-header.go; header=$$?; \
+	$(GO) run $(GOLANGCI_LINT_PACKAGE) run --fix; lint=$$?; \
+	exit $$((lint ? lint : header))
 
 # workaround step for the lint-go-windows CI task because 'go run' can not
 # have distinct GOOS/GOARCH for its build and run steps

build/generate-gitignores.go

@@ -1,3 +1,6 @@
+// Copyright 2020 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
 //go:build ignore
 
 package main

models/db/driver_sqlite_mattn.go

@@ -1,8 +1,8 @@
-//go:build sqlite_mattn && sqlite_unlock_notify
-
 // Copyright 2026 The Gitea Authors. All rights reserved.
 // SPDX-License-Identifier: MIT
 
+//go:build sqlite_mattn && sqlite_unlock_notify
+
 package db
 
 import (

models/db/driver_sqlite_modernc.go

@@ -1,8 +1,8 @@
-//go:build !sqlite_mattn
-
 // Copyright 2026 The Gitea Authors. All rights reserved.
 // SPDX-License-Identifier: MIT
 
+//go:build !sqlite_mattn
+
 // modernc driver is chosen as the default one (compared to mattn, ncruces)
 // * mattn was used as default, but it requires CGO
 // * the CI times are almost the same for these three (race detector must be disabled)

modules/auth/pam/pam_test.go

@@ -1,8 +1,8 @@
-//go:build pam
-
 // Copyright 2021 The Gitea Authors. All rights reserved.
 // SPDX-License-Identifier: MIT
 
+//go:build pam
+
 package pam
 
 import (

modules/charset/ambiguous_gen.go

@@ -1,7 +1,8 @@
-// This file is generated by modules/charset/generate/generate.go DO NOT EDIT
 // Copyright 2026 The Gitea Authors. All rights reserved.
 // SPDX-License-Identifier: MIT
 
+// This file is generated by modules/charset/generate/generate.go DO NOT EDIT
+
 package charset
 
 import "unicode"

modules/charset/generate/generate.go

@@ -139,10 +139,11 @@ func main() {
 	generateInvisible()
 }
 
-var templateAmbiguous = template.Must(template.New("ambiguousTemplate").Parse(`// This file is generated by modules/charset/generate/generate.go DO NOT EDIT
-// Copyright 2026 The Gitea Authors. All rights reserved.
+var templateAmbiguous = template.Must(template.New("ambiguousTemplate").Parse(`// Copyright 2026 The Gitea Authors. All rights reserved.
 // SPDX-License-Identifier: MIT
 
+// This file is generated by modules/charset/generate/generate.go DO NOT EDIT
+
 package charset
 
 import "unicode"
@@ -179,10 +180,11 @@ func newAmbiguousTableMap() map[string]*AmbiguousTable {
 }
 `))
 
-var generatorInvisible = template.Must(template.New("invisibleTemplate").Parse(`// This file is generated by modules/charset/generate/generate.go DO NOT EDIT
-// Copyright 2026 The Gitea Authors. All rights reserved.
+var generatorInvisible = template.Must(template.New("invisibleTemplate").Parse(`// Copyright 2026 The Gitea Authors. All rights reserved.
 // SPDX-License-Identifier: MIT
 
+// This file is generated by modules/charset/generate/generate.go DO NOT EDIT
+
 package charset
 
 import "unicode"

modules/charset/invisible_gen.go

@@ -1,7 +1,8 @@
-// This file is generated by modules/charset/generate/generate.go DO NOT EDIT
 // Copyright 2026 The Gitea Authors. All rights reserved.
 // SPDX-License-Identifier: MIT
 
+// This file is generated by modules/charset/generate/generate.go DO NOT EDIT
+
 package charset
 
 import "unicode"

tools/lint-go-header.go

@@ -0,0 +1,67 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+//go:build ignore
+
+package main
+
+import (
+	"fmt"
+	"io/fs"
+	"os"
+	"path/filepath"
+	"regexp"
+	"strings"
+)
+
+var headerRE = regexp.MustCompile(`^(// (Copyright [^\n]+|All rights reserved\.)\n)*// Copyright \d{4} (The Gogs Authors|The Gitea Authors|Gitea Authors|Gitea)\.( All rights reserved\.)?\n(// (Copyright [^\n]+|All rights reserved\.)\n)*// SPDX-License-Identifier: [\w.-]+`)
+
+var skipDirs = map[string]bool{
+	".git":         true,
+	".venv":        true,
+	"node_modules": true,
+	"public":       true,
+	"web_src":      true,
+}
+
+func main() {
+	root := "."
+	if len(os.Args) > 1 {
+		root = os.Args[1]
+	}
+
+	bad := 0
+	err := filepath.WalkDir(root, func(path string, d fs.DirEntry, err error) error {
+		if err != nil {
+			return err
+		}
+		if d.IsDir() {
+			if skipDirs[d.Name()] {
+				return fs.SkipDir
+			}
+			return nil
+		}
+		if !strings.HasSuffix(path, ".go") {
+			return nil
+		}
+		f, err := os.Open(path)
+		if err != nil {
+			return err
+		}
+		buf := make([]byte, 1024)
+		n, _ := f.Read(buf)
+		f.Close()
+		if !headerRE.Match(buf[:n]) {
+			fmt.Printf("%s: missing or invalid copyright header\n", path)
+			bad++
+		}
+		return nil
+	})
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(2)
+	}
+	if bad > 0 {
+		os.Exit(1)
+	}
+}