Implement FSFE REUSE for golang files (#21840)

Change all license headers to comply with REUSE specification.

Fix #16132

Co-authored-by: flynnnnnnnnnn <flynnnnnnnnnn@github>
Co-authored-by: John Olheiser <[email protected]>

Author: 3 people

CONTRIBUTING.md

@@ -1,6 +1,6 @@
 // Copyright 2020 The Gitea Authors. All rights reserved.
-// Use of this source code is governed by a MIT-style
-// license that can be found in the LICENSE file.
+// SPDX-License-Identifier: MIT
+
 
 //go:build vendor
 

build.go

@@ -1,6 +1,5 @@
 // Copyright 2021 The Gitea Authors. All rights reserved.
-// Use of this source code is governed by a MIT-style
-// license that can be found in the LICENSE file.
+// SPDX-License-Identifier: MIT
 
 //go:build ignore
 

build/code-batch-process.go

@@ -1,6 +1,5 @@
 // Copyright 2021 The Gitea Authors. All rights reserved.
-// Use of this source code is governed by a MIT-style
-// license that can be found in the LICENSE file.
+// SPDX-License-Identifier: MIT
 
 package codeformat
 

build/codeformat/formatimports.go

@@ -1,6 +1,5 @@
 // Copyright 2021 The Gitea Authors. All rights reserved.
-// Use of this source code is governed by a MIT-style
-// license that can be found in the LICENSE file.
+// SPDX-License-Identifier: MIT
 
 package codeformat
 

build/codeformat/formatimports_test.go

@@ -1,6 +1,5 @@
 // Copyright 2020 The Gitea Authors. All rights reserved.
-// Use of this source code is governed by a MIT-style
-// license that can be found in the LICENSE file.
+// SPDX-License-Identifier: MIT
 
 //go:build ignore
 

build/generate-bindata.go

@@ -1,7 +1,6 @@
 // Copyright 2020 The Gitea Authors. All rights reserved.
 // Copyright 2015 Kenneth Shaw
-// Use of this source code is governed by a MIT-style
-// license that can be found in the LICENSE file.
+// SPDX-License-Identifier: MIT
 
 //go:build ignore
 
@@ -209,8 +208,8 @@ func generate() ([]byte, error) {
 
 const hdr = `
 // Copyright 2020 The Gitea Authors. All rights reserved.
-// Use of this source code is governed by a MIT-style
-// license that can be found in the LICENSE file.
+// SPDX-License-Identifier: MIT
+
 
 package emoji
 

build/generate-emoji.go

@@ -1,6 +1,5 @@
 // Copyright 2022 The Gitea Authors. All rights reserved.
-// Use of this source code is governed by a MIT-style
-// license that can be found in the LICENSE file.
+// SPDX-License-Identifier: MIT
 
 //go:build ignore
 

build/generate-go-licenses.go

@@ -1,7 +1,6 @@
 // Copyright 2020 The Gitea Authors. All rights reserved.
 // Copyright (c) 2015, Wade Simmons
-// Use of this source code is governed by a MIT-style
-// license that can be found in the LICENSE file.
+// SPDX-License-Identifier: MIT
 
 // gocovmerge takes the results from multiple `go test -coverprofile` runs and
 // merges them into one profile

build/gocovmerge.go

@@ -1,7 +1,6 @@
 // Copyright 2016 The Gogs Authors. All rights reserved.
 // Copyright 2016 The Gitea Authors. All rights reserved.
-// Use of this source code is governed by a MIT-style
-// license that can be found in the LICENSE file.
+// SPDX-License-Identifier: MIT
 
 package cmd