build: move completions to separate file

completions/meson.build

@@ -0,0 +1,57 @@
+if get_option('zsh-completions')
+	zsh_files = files(
+		'zsh/_sway',
+		'zsh/_swaymsg',
+	)
+	zsh_install_dir = join_paths(datadir, 'zsh', 'site-functions')
+
+	install_data(zsh_files, install_dir: zsh_install_dir)
+endif
+
+if get_option('bash-completions')
+	bash_comp = dependency('bash-completion', required: false)
+
+	bash_files = files(
+		'bash/sway',
+		'bash/swaymsg',
+	)
+
+	if get_option('swaybar')
+		bash_files += files('bash/swaybar')
+	endif
+
+	if bash_comp.found()
+		bash_install_dir = bash_comp.get_variable(
+			pkgconfig: 'completionsdir',
+			pkgconfig_define: ['datadir', datadir]
+		)
+	else
+		bash_install_dir = join_paths(datadir, 'bash-completion', 'completions')
+	endif
+
+	install_data(bash_files, install_dir: bash_install_dir)
+endif
+
+if get_option('fish-completions')
+	fish_comp = dependency('fish', required: false)
+
+	fish_files = files(
+		'fish/sway.fish',
+		'fish/swaymsg.fish',
+	)
+
+	if get_option('swaynag')
+		fish_files += files('fish/swaynag.fish')
+	endif
+
+	if fish_comp.found()
+		fish_install_dir = fish_comp.get_variable(
+			pkgconfig: 'completionsdir',
+			pkgconfig_define: ['datadir', datadir]
+		)
+	else
+		fish_install_dir = join_paths(datadir, 'fish', 'vendor_completions.d')
+	endif
+
+	install_data(fish_files, install_dir: fish_install_dir)
+endif

meson.build

@@ -81,8 +81,6 @@ xcb = dependency('xcb', required: get_option('xwayland'))
 drm_full = dependency('libdrm') # only needed for drm_fourcc.h
 drm = drm_full.partial_dependency(compile_args: true, includes: true)
 libudev = wlroots_features['libinput_backend'] ? dependency('libudev') : null_dep
-bash_comp = dependency('bash-completion', required: false)
-fish_comp = dependency('fish', required: false)
 math = cc.find_library('m')
 rt = cc.find_library('rt')
 xcb_icccm = dependency('xcb-icccm', required: get_option('xwayland'))
@@ -266,59 +264,7 @@ if get_option('default-wallpaper')
 	install_data(wallpaper_files, install_dir: wallpaper_install_dir)
 endif
 
-if get_option('zsh-completions')
+subdir('completions')
-	zsh_files = files(
-		'completions/zsh/_sway',
-		'completions/zsh/_swaymsg',
-	)
-	zsh_install_dir = join_paths(datadir, 'zsh', 'site-functions')
-
-	install_data(zsh_files, install_dir: zsh_install_dir)
-endif
-
-if get_option('bash-completions')
-	bash_files = files(
-		'completions/bash/sway',
-		'completions/bash/swaymsg',
-	)
-
-	if get_option('swaybar')
-		bash_files += files('completions/bash/swaybar')
-	endif
-
-	if bash_comp.found()
-		bash_install_dir = bash_comp.get_variable(
-			pkgconfig: 'completionsdir',
-			pkgconfig_define: ['datadir', datadir]
-		)
-	else
-		bash_install_dir = join_paths(datadir, 'bash-completion', 'completions')
-	endif
-
-	install_data(bash_files, install_dir: bash_install_dir)
-endif
-
-if get_option('fish-completions')
-	fish_files = files(
-		'completions/fish/sway.fish',
-		'completions/fish/swaymsg.fish',
-	)
-
-	if get_option('swaynag')
-		fish_files += files('completions/fish/swaynag.fish')
-	endif
-
-	if fish_comp.found()
-		fish_install_dir = fish_comp.get_variable(
-			pkgconfig: 'completionsdir',
-			pkgconfig_define: ['datadir', datadir]
-		)
-	else
-		fish_install_dir = join_paths(datadir, 'fish', 'vendor_completions.d')
-	endif
-
-	install_data(fish_files, install_dir: fish_install_dir)
-endif
 
 summary({
 	'xwayland': have_xwayland,