Simplify maintainer-conf target by traversing

In another commit we will move more targets there. Because of that we
can put this target in the correct dir and simplify the reading process.

Author: Michael Vasseur

Makefile

@@ -5,7 +5,7 @@
 export TOPDIR = $(shell pwd)
 
 REC_TARGETS=build domserver install-domserver judgehost install-judgehost \
-            docs install-docs inplace-install inplace-uninstall
+            docs install-docs inplace-install inplace-uninstall maintainer-conf
 
 # Global Makefile definitions
 include $(TOPDIR)/Makefile.global
@@ -101,6 +101,7 @@ judgehost:                  SUBDIRS=etc             judge misc-tools
 install-judgehost:          SUBDIRS=etc     lib     judge misc-tools
 docs:                       SUBDIRS=    doc
 install-docs:               SUBDIRS=    doc
+maintainer-conf:            SUBDIRS=                                 webapp
 inplace-install:            SUBDIRS=    doc               misc-tools
 inplace-uninstall:          SUBDIRS=    doc               misc-tools
 dist:                       SUBDIRS=        lib sql       misc-tools
@@ -187,7 +188,7 @@ paths.mk:
 	@exit 1
 
 # Configure for running in source tree, not meant for normal use:
-maintainer-conf: inplace-conf-common composer-dependencies-dev webapp/.env.local
+maintainer-conf: inplace-conf-common composer-dependencies-dev
 inplace-conf: inplace-conf-common composer-dependencies
 inplace-conf-common: dist
 	./configure $(subst 1,-q,$(QUIET)) --prefix=$(CURDIR) \
@@ -205,13 +206,6 @@ inplace-conf-common: dist
 	            --with-baseurl='http://localhost/domjudge/' \
 	            $(CONFIGURE_FLAGS)
 
-# Run Symfony in dev mode (for maintainer-mode):
-webapp/.env.local:
-	@echo "Creating file '$@'..."
-	@echo "# This file was automatically created by 'make maintainer-conf' to run" > $@
-	@echo "# the DOMjudge Symfony application in developer mode. Adjust as needed." >> $@
-	@echo "APP_ENV=dev" >> $@
-
 # Install the system in place: don't really copy stuff, but create
 # symlinks where necessary to let it work from the source tree.
 # This stuff is a hack!

webapp/Makefile

@@ -9,6 +9,15 @@ include $(TOPDIR)/Makefile.global
 # Subdirectories to recurse into for REC_TARGETS
 SUBDIRS = config
 
+maintainer-conf: .env.local
+
+# Run Symfony in dev mode (for maintainer-mode):
+.env.local:
+	@echo "Creating file '$@'..."
+	@echo "# This file was automatically created by 'make maintainer-conf' to run" > $@
+	@echo "# the DOMjudge Symfony application in developer mode. Adjust as needed." >> $@
+	@echo "APP_ENV=dev" >> $@
+
 copy-bundle-assets:
 # We can not use bin/console here, as when using a fakeroot,
 # the include paths are broken. We just copy in the data we need