Makefile: Take advantage of the new helpers in scripts/

Now that we have scripts that implements `sed -i` and emulate `md5sum`
and `sha256sum` it's better to use them rather than spelling out the code
each time.

Makefile

@@ -194,8 +194,6 @@ _install_menu:
 # The original sources contain the @DATADIR@ placeholder and
 # will use a sane default if they find the placeholder instead
 # of a valid path.
-# Note that we don't use ``sed -i`` below because at least
-# in OpenBSD this non-standard switch is not implemented.
 # FIXME Actually the sources contain PREFIX but it should use
 # DATADIR; however now we don't have time to fix that and so
 # the above comment is not (yet) right.
@@ -212,16 +210,14 @@ NEEDEDIT += $(DESTDIR)$(MENUDIR)/neubot-web-ui.desktop
 #
 #_install_edit:
 #	@for EDIT in $(NEEDEDIT); do \
-#	 sed 's|@DATADIR@|$(DATADIR)|g' $$EDIT > $$EDIT.tmp; \
-#	 cat $$EDIT.tmp > $$EDIT; rm $$EDIT.tmp; \
+#	 ./scripts/sed_inplace 's|@DATADIR@|$(DATADIR)|g' $$EDIT; \
 #	done
 #
 # Old style:
 #
 _install_edit:
 	@for EDIT in $(NEEDEDIT); do \
-	 sed 's|@PREFIX@|$(PREFIX)|g' $$EDIT > $$EDIT.tmp; \
-	 cat $$EDIT.tmp > $$EDIT; rm $$EDIT.tmp; \
+	 ./scripts/sed_inplace 's|@PREFIX@|$(PREFIX)|g' $$EDIT; \
 	done
 
 _install_compile:
@@ -334,36 +330,14 @@ _deb_control_skel:
 	 install -m644 debian/$$FILE dist/$$FILE; \
 	done
 
-#
-# Try to be portable and don't assume we're running in the
-# GNU/Linux environment where md5sum is available.
-#
-
 _deb_control_md5sums:
 	@install -m644 /dev/null dist/control/md5sums
-	@FILES=`find dist/data -type f`; \
-	 if [ -x /usr/bin/md5sum ]; then \
-	  for FILE in $$FILES; do \
-	   md5sum $$FILE >> dist/control/md5sums; \
-	  done; \
-	 elif [ -x /bin/cksum ]; then \
-	  for FILE in $$FILES; do \
-	   MD5=`cat $$FILE|/bin/cksum -a md5`; \
-           echo $$MD5 $$FILE >> dist/control/md5sums; \
-	  done; \
-	 else \
-	  echo "error: can't calculate md5sum"; \
-	  exit 1; \
-	 fi
-	@sed 's|dist\/data\/||g' dist/control/md5sums > dist/control/md5sums.1
-	@cat dist/control/md5sums.1 > dist/control/md5sums
-	@rm -rf dist/control/md5sums.1
+	@./scripts/md5sum `find dist/data -type f` > dist/control/md5sums
+	@./scripts/sed_inplace 's|dist\/data\/||g' dist/control/md5sums
 
 _deb_control_size:
 	@SIZE=`du -k -s dist/data/|cut -f1` && \
-	 sed "s|@SIZE@|$$SIZE|" dist/control/control > dist/control/siz && \
-	 cat dist/control/siz > dist/control/control && \
-	 rm dist/control/siz
+	 ./scripts/sed_inplace "s|@SIZE@|$$SIZE|" dist/control/control
 
 _deb_control:
 	@make -f Makefile _deb_control_skel
@@ -431,25 +405,10 @@ lint:
 # Often this command is run as root and we want to be able to
 # write the win32 installer in the directory at the end of the
 # Unix and MacOSX release process.
-# Try to be portable because OpenBSD (for instance) does not
-# have a sha256sum command.
 #
 
 _release_finish:
-	@cd dist && \
-         for FILE in neubot-*; do \
-           if env sha256sum < /dev/null 1> /dev/null 2> /dev/null; then \
-             sha256sum $$FILE >> SHA256.inc; \
-             test $$? || exit 1; \
-           elif env sha256 < /dev/null 1> /dev/null 2> /dev/null; then \
-             sha256 $$FILE | perl -ne \
-              'print "$$2  $$1\n" if /^SHA256 \((.*)\) = (.*)$$/;' \
-              >> SHA256.inc; \
-             test $$? || exit 1; \
-           else \
-              echo "Skipping the SHA256 part..."; \
-           fi \
-         done
+	@cd dist && ../scripts/sha256sum neubot-* >> SHA256.inc
 	@cd dist && chmod 644 *
 	@chmod 777 dist