meson/muon: consolidate scripts & sanitise dist

Move some of the build-system scripts into a top-level meson-scripts
directly, and add a script (meson-scripts/dist-tarball.sh) to clean up
the dist tarball before it's created.

meson-scripts/dist-tarball.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+#
+# Script to sanitise the tarball when calling "meson dist".  By default,
+# "meson dist" calls git-archive, which includes more files than the autotools
+# version of "make dist".
+
+# TODO: ".*" as a glob might be too much in the future; expand this out...
+FILES_TO_IGNORE=".*
+mkrelease.sh
+dev-docs"
+
+(
+	cd "$MESON_DIST_ROOT" && {
+    		IFS=$'\n'
+    		for f in $FILES_TO_IGNORE
+    		do
+        		echo "Removing $f from tarball..."
+        		rm -r "./$f"
+    		done
+	}
+)

meson.build

@@ -22,6 +22,10 @@ add_project_arguments(
     language: 'c',
 )
 
+# This script is used to clean up the release tarball when calling
+# "meson dist".
+meson.add_dist_script('meson-scripts/dist-tarball.sh')
+
 cc = meson.get_compiler('c')
 
 # Undefine _FOTIFY_SOURCE explicitly.  fvwm3 needs work to support this.
@@ -374,7 +378,7 @@ conf_out = configure_file(
     configuration: conf,
 )
 
-conf_cmd = '@0@/runme.sh'.format(meson.current_source_dir())
+conf_cmd = '@0@/meson-scripts/conf-cmd.sh'.format(meson.current_source_dir())
 build_dir = '@0@/config.h'.format(meson.current_build_dir())
 configure_file(
     output: 'config.h',
@@ -566,4 +570,4 @@ summary(
     summary_depvals,
     bool_yn: true,
     section: 'Dependencies',
-)
+)