Expose CALCROOT and new SRCPATHS to build scripts

This begins to decouple the rater directory conventions using an incremental
approach, defaulting to the existing structure.  Not all things were
modified (for example, cleaning will not work properly with a custom
SRCPATHS if those directories do not exist); WIP.

* build-aux/Makefile.am (path_dsl): Use `CALCROOT'.
  (suppliers.mk): Test for existence of program.dep and c1map directory
    before acting on them.
* build-aux/m4/calcdsl.m4: Default SRCPATHS.  Output it during configure.
    Expose CALCROOT and SRCPATHS using AC_SUBST.
    Invoke suppmk-gen using SRCPATHS.
* build-aux/suppmk-gen: Use arguments (SRCPATHS) in place of hard-coded paths.

build-aux/Makefile.am

@@ -21,7 +21,7 @@
 path_rates         := $(path_suppliers)/rates
 path_map           := map
 path_c1map         := $(path_map)/c1
-path_dsl           := rater
+path_dsl           := $(CALCROOT)
 path_tame          := $(path_dsl)/tame
 path_ui            := ui
 path_tests         := test
@@ -189,9 +189,9 @@ clean:
 # an explanation
 suppliers.mk:
 	$(ant) pkg-dep
-	mv $(path_ui)/program.dep $(path_ui)/package-dfns.dep
-	./rater/tame/build-aux/gen-make common/ $(path_suppliers)/ $(path_dsl)/ $(path_map)/ $(path_ui)/ >$@
-	./rater/tame/build-aux/gen-c1make $(path_c1map)/*.xml >>$@
+	test ! -f $(path_ui)/program.dep || mv $(path_ui)/program.dep $(path_ui)/package-dfns.dep
+	$(path_dsl)/tame/build-aux/gen-make $(SRCPATHS) > $@
+	test ! -d $(path_c1map) || $(path_dsl)/tame/build-aux/gen-c1make $(path_c1map)/*.xml >> $@
 
 program-data-copy: standalones program-ui c1map .version.xml
 	mkdir -p "$(path_lv)/src/node/program/rater/programs/@program@"

build-aux/m4/calcdsl.m4

@@ -1,6 +1,6 @@
 # Common build configuration for TAME-based build systems
 #
-#   Copyright (C) 2017 R-T Specialty, LLC.
+#   Copyright (C) 2017, 2018 R-T Specialty, LLC.
 #
 #   This program is free software: you can redistribute it and/or modify
 #   it under the terms of the GNU General Public License as published by
@@ -49,6 +49,13 @@ AS_IF([test "$ANT"],,
 # Automake runs before shell is available, thus the separate m4 variable
 CALCROOT="m4_defn(`calc_root')"
 
+# Default source paths for BC
+test -n "$SRCPATHS" || SRCPATHS='common/ suppliers/ map/ ui/ rater/'
+AC_MSG_NOTICE([using source paths: $SRCPATHS])
+
+AC_SUBST([CALCROOT], [$CALCROOT])
+AC_SUBST([SRCPATHS], [$SRCPATHS])
+
 # Checks to ensure that dslc is built, and gives instructions on how to
 # build it otherwise.  We do not want to build that for them---that can be
 # added to a bootstrap script, but isn't permissible in build scripts.
@@ -79,7 +86,7 @@ AC_OUTPUT
 
 # we want this to run as part of the configure script, not during M4
 # expansion
-"$CALCROOT/build-aux/suppmk-gen"
+"$CALCROOT/build-aux/suppmk-gen" $SRCPATHS
 
 AC_MSG_NOTICE([complete
 

build-aux/suppmk-gen

@@ -27,7 +27,7 @@ while read csv; do
   csvbase="${csv%%.*}"
   echo "$csvbase.xmlo: $csvbase.xml"
   echo "$csvbase.xml: $csvbase.csvo"
-done < <( find suppliers common -regex '^.+\.csv.?$' ) \
+done < <( find "$@" -regex '^.+\.csv.?$' ) \
   >> suppliers.mk
 
 while read tdat; do
@@ -35,6 +35,6 @@ while read tdat; do
   echo "$tbase.xmlo: $tbase.xml rater/core/tdat.xmlo"
   echo "$tbase.xml: $tdat"
   echo -e "\trater/tools/tdat2xml \$< > \$@"
-done < <( find suppliers common -regex '^.+territories/.+\.dat$' ) \
+done < <( find "$@" -regex '^.+territories/.+\.dat$' ) \
   >> suppliers.mk