motds: move motds to separate directory

Makefile.am

@@ -16,14 +16,7 @@
 # along with termux-tools.  If not, see
 # <https://www.gnu.org/licenses/>.
 
-SUBDIRS = scripts doc mirrors
-
-# We have two variants of our motd message:
-#   1. motd.sh: is sourced and echo'es a motd message with something that looks
-#      like termux's logo.
-#   3. motd-playstore: plain text that will only be displayed if the termux-app
-#      version is very old (like the version found in playstore is)
-sysconf_DATA = motd.sh motd-playstore
+SUBDIRS = scripts doc mirrors motds
 
 do_subst = sed -e "s%[@]TERMUX_PREFIX[@]%$(termux_prefix)%g" \
 	       -e "s%[@]TERMUX_APP_PACKAGE[@]%${termux_app_package}%g" \
@@ -41,7 +34,7 @@ $1: $1.in Makefile
 endef
 
 # Login script
-sysconf_DATA += termux-login.sh
+sysconf_DATA = termux-login.sh
 
 # profile.d script
 pkgdata_PROFILE = init-termux-properties.sh

configure.ac

@@ -93,6 +93,6 @@ AC_SUBST(termux_package_manager)
 AC_PROG_LN_S
 
 AC_CONFIG_FILES([Makefile scripts/Makefile doc/Makefile
-mirrors/Makefile])
+mirrors/Makefile motds/Makefile])
 
 AC_OUTPUT

motds/Makefile.am

@@ -0,0 +1,38 @@
+# Copyright (C) 2022 Termux
+
+# This file is part of termux-tools.
+
+# termux-tools is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# termux-tools is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with termux-tools.  If not, see
+# <https://www.gnu.org/licenses/>.
+
+
+# We have two variants of our motd message loaded by login script:
+#   1. motd.sh: A dynamic motd that is executed with bash and echos a
+#      motd message with escape sequences, optionally with a terminal logo.
+#   2. motd: A static motd that is just read as is with cat and displayed.
+
+# The motd-playstore is an additional motd that will only be displayed
+# if the termux-app version is very old (like the version found on playstore)
+sysconf_DATA = motd.sh motd-playstore
+
+CLEANFILES = motd.sh
+
+
+define process-rule
+$1: $1.in Makefile
+	@echo "Creating $1"
+	@cat $(srcdir)/$1.in > $1
+endef
+
+$(eval $(call process-rule,motd.sh))