build: add ./configure, compile .go files.

* configure: New file.
* build-aux/build-guile.sh: New file.
* makefile (all-go): New target.

.gitignore

@@ -1,3 +1,4 @@
 *.go
 *~
 /bin/gash
+/.config.make

bin/gash.in

@@ -1,5 +1,13 @@
-#!@GUILE@ \
--L . --no-auto-compile -s
+#! /bin/sh
+# -*-scheme-*-
+exec ${GUILE-guile} -L $(pwd)/bin -L $(pwd) -C $(pwd)/bin -C $(pwd) --no-auto-compile -e '(gash)' -s $0 $@
 !#
-(setenv "SHELL" ((compose canonicalize-path car command-line)))
-((@ (gash gash) main) (command-line))
+(define-module (gash)
+  #:export (main))
+
+(set! %load-path (append '("@GUILE_SITE_DIR@") %load-path))
+(set! %load-compiled-path (append '("@GUILE_SITE_CCACHE_DIR@") %load-compiled-path))
+
+(define (main args)
+  (setenv "SHELL" ((compose canonicalize-path car command-line)))
+  ((@ (gash gash) main) (command-line)))

build-aux/build-guile.sh

@@ -0,0 +1,68 @@
+#! /bin/sh
+
+# Gash --- Guile As SHell
+# Copyright © 2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+#
+# This file is part of Gash.
+#
+# Gash 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.
+#
+# Gash 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 Gash.  If not, see <http://www.gnu.org/licenses/>.
+
+if [ -n "$BUILD_DEBUG" ]; then
+    set -x
+fi
+
+export GUILE
+export GUILE_AUTO_COMPILE
+export GUILE_LOAD_PATH
+export GUILE_LOAD_COMPILED_PATH
+
+GUILE_LOAD_PATH=$(pwd):$GUILE_LOAD_PATH
+GUILE_LOAD_COMPILED_PATH=$(pwd):$GUILE_LOAD_COMPILED_PATH
+GUILE=${GUILE-$(command -v guile)}
+GUILE_TOOLS=${GUILE_TOOLS-$(command -v guile-tools)}
+GUILE_AUTO_COMPILE=0
+
+set -e
+
+SCM_FILES="
+gash/gash.scm
+gash/io.scm
+gash/job.scm
+gash/peg.scm
+gash/pipe.scm
+gash/util.scm
+"
+
+export srcdir=.
+export host=$($GUILE -c "(display %host-type)")
+
+for i in $SCM_FILES; do
+    go=${i%%.scm}.go
+    if [ $i -nt $go ]; then
+        echo "  GUILEC $i"
+        $GUILE_TOOLS compile -L bin -L gash -o $go $i
+    fi
+done
+
+SCRIPTS="
+bin/gash
+"
+
+for i in $SCRIPTS; do
+    go=${i%%.scm}.go
+    if [ $i -nt $go ]; then
+        echo "  GUILEC $i"
+        $GUILE_TOOLS compile -L guile -L scripts -o $go $i
+    fi
+done

configure

@@ -0,0 +1,39 @@
+#! /bin/sh
+
+# parse --prefix=PREFIX, mainly for GuixSD/Debian
+cmdline=$(echo "$@")
+PREFIX=${cmdline##*--prefix=}
+PREFIX=${PREFIX% *}
+PREFIX=${PREFIX% -*}
+if [ -z "$PREFIX" ]; then
+   PREFIX=/usr/local
+fi
+
+GUILE=$(command -v guile)
+GUILE_TOOLS=$(command -v guile-tools)
+GUILE_SITE_DIR=$PREFIX/share/guile/site/$GUILE_EFFECTIVE_VERSION
+GUILE_SITE_CCACHE_DIR=$PREFIX/lib/guile/$GUILE_EFFECTIVE_VERSION/site-ccache
+GUILE_EFFECTIVE_VERSION=$(guile -c '(display (effective-version))')
+
+sed \
+    -e s,@GUILE@,$GUILE,\
+    -e s,@GUILE_SITE_DIR@,$GUILE_SITE_DIR,\
+    -e s,@GUILE_SITE_CCACHE_DIR@,$GUILE_SITE_CCACHE_DIR,\
+    bin/gash.in > bin/gash
+chmod +x bin/gash
+cat > .config.make <<EOF
+GUILE=$GUILE
+GUILE_TOOLS=$GUILE_TOOLS
+PREFIX=$PREFIX
+BINDIR=$PREFIX/bin
+DOCDIR=$PREFIX/share/doc/gash
+GUILE_EFFECTIVE_VERSION=$GUILE_EFFECTIVE_VERSION
+GUILE_SITE_DIR=$GUILE_SITE_DIR
+GUILE_SITE_CCACHE_DIR=$GUILE_SITE_CCACHE_DIR
+EOF
+
+cat <<EOF
+Run:
+  make            to build gash
+  make help       for help on other targets
+EOF

makefile

@@ -1,10 +1,55 @@
-all: bin/gash
+.PHONY: all all-go clean install
+-include .config.make
 
-GUILE = $(shell $(SHELL) -c "command -v guile")
+default: all
+
+.config.make: makefile
+	./configure --prefix=$(PREFIX)
 
 bin/gash: bin/gash.in
-	sed s,@GUILE@,$(GUILE), $< > $@
-	chmod +x $@
+	./configure --prefix=$(PREFIX)
+
+all: all-go bin/gash
+
+all-go:
+	build-aux/build-guile.sh
 
 clean:
-	rm -f bin/gash
+	git clean -fdx
+
+clean-go:
+	rm -f $(shell find . -name '*.go')
+
+check: all
+	echo TODO
+
+install: all
+	mkdir -p $(DESTDIR)$(BINDIR)
+	cp bin/gash $(DESTDIR)$(BINDIR)/gash
+	mkdir -p $(DESTDIR)$(GUILE_SITE_DIR)
+	tar -cf- gash/*.scm | tar -C $(DESTDIR)$(GUILE_SITE_DIR) -xf-
+	mkdir -p $(DESTDIR)$(GUILE_SITE_CCACHE_DIR)
+	cp bin/gash.go  $(DESTDIR)$(GUILE_SITE_CCACHE_DIR)
+	tar -cf- gash/*.go | tar -C $(DESTDIR)$(GUILE_SITE_CCACHE_DIR) -xf-
+	mkdir -p $(DESTDIR)$(DOCDIR)
+	cp -f COPYING README TODO $(DOCDIR)
+
+define HELP_TOP
+Usage: make [OPTION]... [TARGET]...
+
+Targets:
+  all             update everything
+  all-go          update .go files
+  clean           run git clean -dfx
+  clean-go        clean .go files
+  install         install in $(PREFIX)
+endef
+export HELP_TOP
+help:
+	@echo "$$HELP_TOP"
+
+export GUILE
+export GUILE_TOOLS
+export GUILE_LOAD_PATH
+export GUILE_LOAD_COMPILED_PATH
+