ffmuc-mesh-vpn-wireguard: add shell minifier

ffmuc-mesh-vpn-wireguard-vxlan/Makefile

@@ -14,4 +14,30 @@ define Package/ffmuc-mesh-vpn-wireguard-vxlan
   DEPENDS:=+gluon-mesh-vpn-core +micrond +kmod-wireguard +wireguard-tools +ip-full +lua-jsonc
 endef
 
+define ShSrcDiet
+	rm -rf $(2)
+	$(CP) $(1) $(2)
+  ifdef CONFIG_GLUON_MINIFY
+	set -e; $(FIND) $(2) -type f | while read src; do \
+		echo "Minifying $$$$src..."; \
+		./shell_minify.sh "$$$$src"; \
+	done
+  endif
+endef
+
+define Build/Compile
+	$(call Gluon/Build/Compile)
+	$(if $(wildcard ./shsrc/.),
+		$(call ShSrcDiet,shsrc,$(PKG_BUILD_DIR)/shdest/)
+	)
+endef
+
+define Package/$(PKG_NAME)/install
+	$(Gluon/Build/Install)
+
+	$(if $(wildcard ./shsrc/.),
+		$(CP) $(PKG_BUILD_DIR)/shdest/. $(1)/
+	)
+endef
+
 $(eval $(call BuildPackageGluon,ffmuc-mesh-vpn-wireguard-vxlan))

ffmuc-mesh-vpn-wireguard-vxlan/shell_minify.sh

@@ -0,0 +1,61 @@
+#!/bin/sh
+# SPDX-License-Identifier: MIT
+
+set -eu
+
+strip_comments() {
+    filename=$1
+
+    # strip comments from all but the first line
+    sed -i '2,$s/\s*#.*//' "${filename}"
+
+    # strip first line if it isn't a shebang
+    sed -i '1s/\s*#[^!].*//' "${filename}"
+}
+
+strip_duplicate_newlines() {
+    filename=$1
+
+    # strip empty lines
+    sed -i '/^\s*$/d' "${filename}"
+}
+
+strip_spaces_around_vertical_bar() {
+    filename=$1
+
+    # convert "true | false" to "true|false"
+    sed -i 's/\s\+|\s*/|/g' "${filename}"
+    # convert "true | false" to "true|false"
+    sed -i 's/\s*|\s\+/|/g' "${filename}"
+}
+
+strip_spaces_between_semicolon_and_then_or_do() {
+    filename=$1
+
+    # convert "if true; then" to "if true;then"
+    sed -i 's/;\s\+then/;then/g' "${filename}"
+
+    # convert "for xxx; do" to "for xxx;do" and "; done" to ";done"
+    sed -i 's/;\s\+do/;do/g' "${filename}"
+}
+
+strip_spaces_around_boolean_operators() {
+    filename=$1
+
+    # convert "true && false" to "true&&false"
+    sed -i 's/\s*||\s*/||/g' "${filename}"
+    sed -i 's/\s*&&\s*/&&/g' "${filename}"
+}
+
+strip_trailing_semicolon() {
+    filename=$1
+    # remove trailing ; excluding ";;" for switch/case clauses
+    sed -i 's/\([^;]\);$/\1/' "${filename}"
+}
+
+strip_comments "$1"
+strip_trailing_semicolon "$1"
+strip_duplicate_newlines "$1"
+strip_spaces_around_vertical_bar "$1"
+strip_spaces_around_boolean_operators "$1"
+strip_spaces_between_semicolon_and_then_or_do "$1"