Support non-standard install locations

This build system overhaul allows for adding (define-style) macros to
our scripts. All source files are now suffixed with ".in" to clarify
that they might contain unprocessed defines. The Makefile provides a new
rule to preprocess source files and generate proper output scripts.

Also, add a "@pkgdatadir@" define (as used in GNU Autotools) and use it
instead of hardcoded paths to "/usr/share/devtools" everywhere. We
missed this when adding PREFIX support to the build system in commit
35fc83ce7d.

Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>

.gitignore

@@ -1,2 +1,15 @@
 *~
 devtools-*.tar.gz
+archbuild
+archco
+archrelease
+archrm
+bash_completion
+checkpkg
+commitpkg
+finddeps
+lddd
+makechrootpkg
+mkarchroot
+rebuildpkgs
+zsh_completion

Makefile

@@ -47,7 +47,13 @@ ARCHBUILD_LINKS = \
 	multilib-build \
 	multilib-testing-build
 
-all:
+all: $(BINPROGS) $(SBINPROGS) bash_completion zsh_completion
+
+%: %.in
+	@echo "GEN $@"
+	@sed -e "s|@pkgdatadir[@]|$(DESTDIR)$(PREFIX)/share/devtools|g" "$<" >"$@"
+	@chmod a-w "$@"
+	@chmod +x "$@"
 
 install:
 	install -dm0755 $(DESTDIR)$(PREFIX)/bin

archbuild.in

@@ -54,8 +54,8 @@ if ${clean_first} || [[ ! -d "${chroots}/${repo}-${arch}" ]]; then
 	rm -rf "${chroots}/${repo}-${arch}"
 	mkdir -p "${chroots}/${repo}-${arch}"
 	setarch "${arch}" mkarchroot \
-		-C "/usr/share/devtools/pacman-${repo}.conf" \
-		-M "/usr/share/devtools/makepkg-${arch}.conf" \
+		-C "@pkgdatadir@/pacman-${repo}.conf" \
+		-M "@pkgdatadir@/makepkg-${arch}.conf" \
 		"${chroots}/${repo}-${arch}/root" \
 		"${base_packages[@]}"
 else