all: remove old // +build comments (#2431)

Closes #2325

CONTRIBUTING.md

@@ -49,7 +49,6 @@ You don't have to update existing files' license comments.
 
 ```go
 //go:build example
-// +build example
 ```
 
 `example` is to prevent from installing executions by `go get github.com/hajimehoshi/ebiten/v2/...`.

audio/buffersize_mobile.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build android || ios
-// +build android ios
 
 package audio
 

audio/buffersize_notmobile.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build !android && !ios
-// +build !android,!ios
 
 package audio
 

audio/error_notios.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build !ios
-// +build !ios
 
 package audio
 

cmd/ebitenmobile/gobind.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build ebitenmobilegobind
-// +build ebitenmobilegobind
 
 // gobind is a wrapper of the original gobind. This command adds extra files like a view controller.
 package main

cmd/ebitenmobile/gomobile.go

@@ -116,8 +116,7 @@ func prepareGomobileCommands() (string, error) {
 
 	const (
 		modname   = "ebitenmobiletemporary"
-		buildtags = "//go:build tools" +
-			"\n// +build tools"
+		buildtags = "//go:build tools"
 	)
 	if err := runGo("mod", "init", modname); err != nil {
 		return tmp, err

ebitenutil/file_notjs.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build !android && !ios && !js
-// +build !android,!ios,!js
 
 package ebitenutil
 

ebitenutil/gen.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build ignore
-// +build ignore
 
 package main
 

ebitenutil/loadimage_notmobile.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build !android && !ios
-// +build !android,!ios
 
 package ebitenutil
 

examples/2048/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/additive/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/address/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/airship/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/alphablending/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/animation/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/audio/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 // This is an example to implement an audio player.
 // See examples/wav for a simpler example to play a sound file.

examples/audioinfiniteloop/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/audiopanning/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/blocks/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/blur/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/camera/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/chipmunk/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/clip/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/contextlost/context_js.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/contextlost/context_notjs.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example && !js
-// +build example,!js
 
 package main
 

examples/contextlost/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/cursor/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/doomfire/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/drag/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/filter/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/flappy/crt.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build ignore
-// +build ignore
 
 // Reference: a public domain CRT effect
 // https://github.com/libretro/glsl-shaders/blob/master/crt/shaders/crt-lottes.glsl

examples/flappy/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/flappy/main_c.go

@@ -13,8 +13,6 @@
 // limitations under the License.
 
 //go:build example && (microsoftgdk || nintendosdk)
-// +build example
-// +build microsoftgdk nintendosdk
 
 // This file is for some special environments using 'microsoftgdk' or 'nintendosdk'.
 // You usually don't have to care about this file.

examples/flood/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/font/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/fullscreen/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/gamepad/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/highdpi/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/hsv/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/hue/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/infinitescroll/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/isometric/game.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/isometric/level.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/isometric/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/isometric/spritesheet.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/isometric/tile.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/keyboard/keyboard/gen.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build ignore
-// +build ignore
 
 package main
 

examples/keyboard/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/lasttouch/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/life/main.go

@@ -22,7 +22,6 @@
 // DEALINGS IN THE SOFTWARE.
 
 //go:build example
-// +build example
 
 package main
 

examples/mandelbrot/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/mascot/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 // Mascot is a desktop mascot on cross platforms.
 // This is inspired by mattn's gopher (https://github.com/mattn/gopher).

examples/masking/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/minify/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 // This example is an experiment to minify images with various filters.
 // When linear filter is used, mipmap images should be used for high-quality rendering (#578).

examples/moire/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 // This example is just to check if Ebitengine can draw fine checker pattern evenly.
 // If there is something wrong in the implementation, the result might include

examples/mosaic/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/noise/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/paint/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/particles/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/pcm/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/perspective/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/piano/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/platformer/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/polygons/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/raycasting/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/realtimepcm/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/rotate/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/set/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/shader/chromaticaberration.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build ignore
-// +build ignore
 
 package main
 

examples/shader/default.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build ignore
-// +build ignore
 
 package main
 

examples/shader/dissolve.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build ignore
-// +build ignore
 
 package main
 

examples/shader/lighting.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build ignore
-// +build ignore
 
 package main
 

examples/shader/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/shader/radialblur.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build ignore
-// +build ignore
 
 package main
 

examples/shader/texel.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build ignore
-// +build ignore
 
 package main
 

examples/shader/water.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build ignore
-// +build ignore
 
 package main
 

examples/shapes/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/sinewave/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/skipdraw/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/snake/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/sprites/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/spriteshd/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/squiral/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 // This demo is inspired by the xscreensaver 'squirals'.
 

examples/stars/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/text/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/tiles/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/touch/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/typewriter/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/ui/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/vector/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/vibrate/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/wav/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/wheel/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/windowclosing/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

examples/windowsize/main.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build example
-// +build example
 
 package main
 

genevents.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build ignore
-// +build ignore
 
 package main
 

genkeys.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build ignore
-// +build ignore
 
 // The key name convention follows the Web standard: https://www.w3.org/TR/uievents-code/#keyboard-key-codes
 
@@ -822,15 +821,11 @@ func main() {
 		buildTag := ""
 		switch path {
 		case filepath.Join("internal", "glfw", "keys.go"):
-			buildTag = "//go:build !js" +
-				"\n// +build !js"
+			buildTag = "//go:build !js"
 		case filepath.Join("internal", "ui", "keys_mobile.go"):
-			buildTag = "//go:build (android || ios) && !nintendosdk" +
-				"\n// +build android ios" +
-				"\n// +build !nintendosdk"
+			buildTag = "//go:build (android || ios) && !nintendosdk"
 		case filepath.Join("internal", "ui", "keys_glfw.go"):
-			buildTag = "//go:build !android && !ios && !js && !nintendosdk" +
-				"\n// +build !android,!ios,!js,!nintendosdk"
+			buildTag = "//go:build !android && !ios && !js && !nintendosdk"
 		}
 		// NOTE: According to godoc, maps are automatically sorted by key.
 		if err := tmpl.Execute(f, struct {

internal/debug/debug_ebitenginedebug.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build ebitenginedebug || ebitendebug
-// +build ebitenginedebug ebitendebug
 
 package debug
 

internal/debug/debug_notebitenginedebug.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build !ebitenginedebug && !ebitendebug
-// +build !ebitenginedebug,!ebitendebug
 
 package debug
 

internal/devicescale/impl_desktop.go

@@ -13,7 +13,6 @@
 // limitations under the License.
 
 //go:build !android && !ios && !js
-// +build !android,!ios,!js
 
 package devicescale