makepkg: move BUILDSCRIPT from makepkg.conf

Commit 4b183bf9 moved makepkg.conf sourcing to after the parsing
of options, breaking the -p option and --help output.  The solution
is to move BUILDSCRIPT out of makepkg.conf.  This patch moves the
definition BUILDSCRIPT back to makepkg itself and adds configure
option to allow easy changing of this value during build time.

Signed-off-by: Allan McRae <allan@archlinux.org>
Signed-off-by: Dan McGee <dan@archlinux.org>

configure.ac

@@ -88,6 +88,11 @@ AC_ARG_WITH(db-ext,
 	AS_HELP_STRING([--with-db-ext=ext], [set the file extension used by the database]),
 	[DBEXT=$withval], [DBEXT=.db.tar.gz])
 
+# Help line for buildscript filename
+AC_ARG_WITH(buildscript,
+	AS_HELP_STRING([--with-buildscript=name], [set the build script name used by makepkg]),
+	[BUILDSCRIPT=$withval], [BUILDSCRIPT=PKGBUILD])
+
 # Help line for libdownload/libfetch
 AC_ARG_ENABLE(internal-download,
 	AS_HELP_STRING([--disable-internal-download], [do not build with libdownload/libfetch support]),
@@ -314,6 +319,9 @@ AC_DEFINE_UNQUOTED([SRCEXT], "$SRCEXT", [The file extension used by pacman sourc
 # Set database file extension
 AC_SUBST(DBEXT)
 AC_DEFINE_UNQUOTED([DBEXT], "$DBEXT", [The file extension used by pacman databases])
+# Set makepkg build script name
+AC_SUBST(BUILDSCRIPT)
+AC_DEFINE_UNQUOTED([BUILDSCRIPT], "$BUILDSCRIPT", [The build script name used by makepkg])
 
 # Configuration files
 AC_CONFIG_FILES([
@@ -362,6 +370,7 @@ ${PACKAGE_NAME}:
     package extension      : ${PKGEXT}
     source pkg extension   : ${SRCEXT}
     database extension     : ${DBEXT}
+    build script name      : ${BUILDSCRIPT}
 
   Compilation options:
     Run make in doc/ dir   : ${wantdoc}

etc/makepkg.conf.in

@@ -95,13 +95,12 @@ PURGE_TARGETS=(usr/{,share}/info/dir .packlist *.pod)
 #PACKAGER="John Doe <john@doe.com>"
 
 #########################################################################
-# BUILDSCRIPT/EXTENSION DEFAULTS
+# EXTENSION DEFAULTS
 #########################################################################
 #
 # WARNING: Do NOT modify these variables unless you know what you are
 #          doing.
 #
-BUILDSCRIPT='PKGBUILD'
 PKGEXT='@PKGEXT@'
 SRCEXT='@SRCEXT@'
 

scripts/Makefile.am

@@ -37,6 +37,7 @@ edit = sed \
 	-e 's|@PACKAGE_BUGREPORT[@]|$(PACKAGE_BUGREPORT)|g' \
 	-e 's|@PACKAGE_NAME[@]|$(PACKAGE_NAME)|g' \
 	-e 's|@DBEXT[@]|$(DBEXT)|g' \
+	-e 's|@BUILDSCRIPT[@]|$(BUILDSCRIPT)|g' \
 	-e 's|@SIZECMD[@]|$(SIZECMD)|g' \
 	-e 's|@configure_input[@]|Generated from $@.in; do not edit by hand.|g'
 

scripts/makepkg.sh.in

@@ -38,6 +38,7 @@ export COMMAND_MODE='legacy'
 
 myver='@PACKAGE_VERSION@'
 confdir='@sysconfdir@'
+BUILDSCRIPT='@BUILDSCRIPT@'
 startdir="$PWD"
 srcdir="$startdir/src"
 pkgdir="$startdir/pkg"