Re·order remakes to (again) fix restarts

In cases where `$(BUILDDIR)/dependencies` exists but
`$(BUILDDIR)/.update-types` (initially) does not, it is important to
check for dependency updates *first*, prior to checking for parser
updates. This is because when parsers are updated, the dependency file
will be deleted, causing the dependency reload recipe to activate
immediately (prior to a restart) if it hasn’t already been checked.

Having correct behaviour depend on the ordering of these recipes isn’t
ideal, but the alternative is checking whether
`$(BUILDDIR)/.update-types` was created *in the course of processing
the make·file* and disabling dependency creation until the next restart
if it had been. This sounds unbearably complex and difficult to phrase
in a readable manner.

diff --git a/GNUmakefile b/GNUmakefile
index 72712c8521086ebaec9269aedbb958141ecedfc4..6d68702280c8899fbbbc9464802c57a2a87b0085 100644 (file)
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -242,7 +242,7 @@ override sourcefile = $(foreach file,$1,$(if $(filter about:shushe?include=%,$(f
 # This file is created after a reload due to type changes, and is
 # removed after. Requiring it ensures that file classifications are
 # up‐to‐date immediately after the reload.
-override typeupdates := $(if $(wildcard $(BUILDDIR)/.update-types),$(BUILDDIR)/.update-types,)
+override typeupdates := $(wildcard $(BUILDDIR)/.update-types)
 
 # (callable) Get the location of the transformed X·M·L files for the
 # given source files.
@@ -332,6 +332,21 @@ $(call compiled,$(recursivefiles)): $(BUILDDIR)/public/%:
 # Phony rules; always consider these out‐of‐date.
 .PHONY: all default clean gone info install list $(call compiled,$(recursivefiles));
 
+ifneq ($(wildcard $(BUILDDIR)/.update-types)$(wildcard $(BUILDDIR)/dependencies),)
+# Reload this make·file if the dependency graph has changed.
+#
+# This graph is a dependency for some of the variables that this
+# make·file uses, so it’s important to ensure that they are actually
+# up‐to‐date prior to executing any later rules.
+#
+# This recipe only exists after types have been updated or when the
+# dependency graph already exists.
+$(THISDIR)/GNUmakefile:: $(BUILDDIR)/dependencies
+       $(silent)$(TOUCH) $(THISDIR)/GNUmakefile
+       $(silent)$(RM) -f $(BUILDDIR)/.update-types
+       @$(PRINTF) '%b\n' '\0033[1mDependency graph updated. Restarting…\0033[22m'
+endif
+
 ifeq ($(wildcard $(BUILDDIR)/.update-types),)
 # Reload this make·file if any of the magic files or parsers have
 # changed.
@@ -343,25 +358,10 @@ ifeq ($(wildcard $(BUILDDIR)/.update-types),)
 # the restart have a more current time·stamp.
 $(THISDIR)/GNUmakefile:: $(BUILDDIR)/magic.mgc $(BUILDDIR)/parser.xslt $(THISDIR)/lib/parser2types.xslt
        $(silent)$(TOUCH) $(THISDIR)/GNUmakefile
-       $(silent)$(TOUCH) $(call quote,$(BUILDDIR)/.update-types)
        $(silent)$(RM) -f $(call quote,$(BUILDDIR)/dependencies)
        @$(PRINTF) '%b\n' '\0033[1mMagic file or parsers have updated. Restarting…\0033[22m'
        $(silent)$(SLEEP) 1
-endif
-
-ifneq ($(wildcard $(BUILDDIR)/.update-types)$(wildcard $(BUILDDIR)/dependencies),)
-# Reload this make·file if the dependency graph has changed.
-#
-# This graph is a dependency for some of the variables that this
-# make·file uses, so it’s important to ensure that they are actually
-# up‐to‐date prior to executing any later rules.
-#
-# This recipe only exists after types have been updated or when the
-# dependency graph already exists.
-$(THISDIR)/GNUmakefile:: $(BUILDDIR)/dependencies
-       $(silent)$(TOUCH) $(THISDIR)/GNUmakefile
-       $(silent)$(RM) -f $(BUILDDIR)/.update-types
-       @$(PRINTF) '%b\n' '\0033[1mDependency graph updated. Restarting…\0033[22m'
+       $(silent)$(TOUCH) $(call quote,$(BUILDDIR)/.update-types)
 endif
 
 # ─ ¶ Build Targets ───────────────────────────────────────────────────
@@ -386,12 +386,6 @@ $(BUILDDIR)/parser.xslt: $(BUILDDIR)/parser.catalog $(THISDIR)/lib/catalog2parse
        @$(ECHO) "Generating main parser…"
        $(silent)$(XSLTPROC) -o $(call quote,$@) $(call quote,$(THISDIR)/lib/catalog2parser.xslt) $(call quote,$<)
 
-# Note updates to parsers or magic.
-#
-# This file is actually generated as part of the make·file restart
-# process, so it doesn’t need any recipes.
-$(BUILDDIR)/.update-types: $(BUILDDIR)/magic.mgc $(BUILDDIR)/parser.xslt $(THISDIR)/lib/parser2types.xslt ;
-
 # Parse the files.
 #
 # Even plain X·M·L files are parsed, because they may contain X·H·T·M·L