“Simplify” the restart mechanism using $?

[Shushe] / GNUmakefile

diff --git a/GNUmakefile b/GNUmakefile
index ecaade9f7d3e46a4c491190bc6a6c5f8f02380d3..78f9a41d4d1cd69fd09eef546ed32b3814453576 100644 (file)
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -269,6 +269,9 @@ override space := $(empty) $(empty)
 # A variable which contains a single comma.
 override comma := ,
 
 # A variable which contains a single comma.
 override comma := ,
 

+# (callable) Make empty strings non·empty, and non·empty strings empty.
+override not = $(if $1,,1)
+

 # (callable) Quote the given string for use within shell calls.
 override quote = '$(subst ','"'"',$1)'
 
 # (callable) Quote the given string for use within shell calls.
 override quote = '$(subst ','"'"',$1)'
 


@@ -379,7 +382,7 @@ override plaintextfiles := $(filter-out $(xmlfiles),$(call filesoftype,$(plainte
 override assetfiles := $(filter-out $(xmlfiles) $(plaintextfiles),$(sourcefiles) $(sourceincludes))
 
 # (callable) Get the types of the given files.
 override assetfiles := $(filter-out $(xmlfiles) $(plaintextfiles),$(sourcefiles) $(sourceincludes))
 
 # (callable) Get the types of the given files.

-override typeoffile = $(foreach file,$1,$(or $(patsubst $(file)|%,%,$(filter $(file)|%,$(types))),$(error Unable to get type of file `$(file)´)))
+override typeoffile = $(foreach file,$1,$(or $(patsubst $(file)|%,%,$(filter $(file)|%,$(types))),application/octet-stream))

 
 # Pair each source magic file with its location in the build directory.
 override magicpair := $(foreach magicfile,$(MAGIC),$(magicfile)|$(BUILDDIR)/magic/$(call namehash,$(magicfile)))
 
 # Pair each source magic file with its location in the build directory.
 override magicpair := $(foreach magicfile,$(MAGIC),$(magicfile)|$(BUILDDIR)/magic/$(call namehash,$(magicfile)))


@@ -414,7 +417,7 @@ override sourcefile = $(foreach local,$1,$(patsubst %|$(local),%,$(filter %|$(lo
 #
 # This file is created before a reload due to type changes, and is removed after.
 # This ensures that file classifications are up·to·date immediately after the reload.
 #
 # This file is created before a reload due to type changes, and is removed after.
 # This ensures that file classifications are up·to·date immediately after the reload.

-override typeupdates := $(if $(wildcard $(BUILDDIR)/.update-types),FORCE,)
+override typeupdates := $(and $(wildcard $(BUILDDIR)/.update-types),FORCE)

 
 # Pair each source file and include with its metadata location.
 override sourcemetadatapair := $(foreach file,$(sourcefiles) $(sourceincludes),$(file)|$(BUILDDIR)/$(if $(filter $(file),$(sourceincludes)),includes.metadata/$(call includepath,$(file)),sources.metadata/$(call sourcepath,$(file))))
 
 # Pair each source file and include with its metadata location.
 override sourcemetadatapair := $(foreach file,$(sourcefiles) $(sourceincludes),$(file)|$(BUILDDIR)/$(if $(filter $(file),$(sourceincludes)),includes.metadata/$(call includepath,$(file)),sources.metadata/$(call sourcepath,$(file))))


@@ -434,8 +437,8 @@ override parsed = $(foreach file,$1,$(patsubst $(file)|%,%,$(filter $(file)|%,$(
 # (callable) Get the source files for the given parsed file.
 override unparsed = $(foreach file,$1,$(patsubst %|$(file),%,$(filter %|$(file),$(sourceparsedpair))))
 
 # (callable) Get the source files for the given parsed file.
 override unparsed = $(foreach file,$1,$(patsubst %|$(file),%,$(filter %|$(file),$(sourceparsedpair))))
 

-# Pair each parser, transform, source file, parsed file, or metadata compilation with its file u·r·i.
-override fileuripairs := $(join $(patsubst %,%|,$(PARSERS) $(TRANSFORMS) $(sourcefiles) $(sourceincludes) $(call parsed,$(sourcefiles) $(sourceincludes)) $(BUILDDIR)/metadata),$(call pathenc,$(foreach uriable,$(PARSERS) $(TRANSFORMS) $(sourcefiles) $(sourceincludes) $(call parsed,$(sourcefiles) $(sourceincludes)) $(BUILDDIR)/metadata,file://$(abspath $(uriable)))))
+# Pair each build directory, parser, transform, or source file with its file u·r·i.
+override fileuripairs := $(join $(patsubst %,%|,$(BUILDDIR) $(PARSERS) $(TRANSFORMS) $(sourcefiles) $(sourceincludes)),$(call pathenc,$(foreach uriable,$(BUILDDIR) $(PARSERS) $(TRANSFORMS) $(sourcefiles) $(sourceincludes),file://$(abspath $(uriable)))))

 
 # (callable) Get the file u·r·is for the given parsers, transforms, parsed files, or metadata compilations.
 override fileuri = $(foreach file,$1,$(or $(patsubst $(file)|%,%,$(filter $(file)|%,$(fileuripairs))),$(error Unable to get file u·r·i for `$(file)´)))
 
 # (callable) Get the file u·r·is for the given parsers, transforms, parsed files, or metadata compilations.
 override fileuri = $(foreach file,$1,$(or $(patsubst $(file)|%,%,$(filter $(file)|%,$(fileuripairs))),$(error Unable to get file u·r·i for `$(file)´)))


@@ -478,12 +481,13 @@ ifneq ($(wildcard $(BUILDDIR)/destinations),)
 override destinations := $(shell $(CAT) $(BUILDDIR)/destinations)
 
 # Pair source files and their destinations.
 override destinations := $(shell $(CAT) $(BUILDDIR)/destinations)
 
 # Pair source files and their destinations.

-override sourcedestinationpair := $(foreach destination,$(destinations),$(call sourcefile,$(firstword $(subst |, ,$(destination))))|$(call perdec,$(subst $(space),|,$(wordlist 2,$(words $(subst |, ,$(destination))),$(subst |, ,$(destination))))))
+override sourcedestinationpair := $(foreach destination,$(destinations),$(call sourcefile,$(firstword $(subst |, ,$(destination))))|$(subst $(space),|,$(wordlist 2,$(words $(subst |, ,$(destination))),$(subst |, ,$(destination)))))
+endif

 
 

-# (callable) Get the destination for the given source files, or return `NOTDEF´.
+# (callable) Get the destination for the given source files, or return `.NOTDEF/$1´.

 #
 #

-# The fallback here is because destinations are used to generate targets and thus must always be non·empty, even when they haven’t been generated yet.
-override destination = $(foreach file,$1,$(or $(patsubst $(file)|%,%,$(filter $(file)|%,$(sourcedestinationpair))),NOTDEF))
+# The fallback here is because destinations are used to generate targets and thus must always be non·empty and should be unique, even when they haven’t been generated yet.
+override destination = $(foreach file,$1,$(or $(patsubst $(file)|%,%,$(filter $(file)|%,$(sourcedestinationpair))),.NOTDEF/$1))

 
 # Pair each source file with its compiled location.
 override sourcecompiledpair := $(foreach file,$(sourcefiles),$(file)|$(BUILDDIR)/results/$(call destination,$(file)))
 
 # Pair each source file with its compiled location.
 override sourcecompiledpair := $(foreach file,$(sourcefiles),$(file)|$(BUILDDIR)/results/$(call destination,$(file)))


@@ -502,7 +506,6 @@ override unbuilt = $(foreach file,$1,$(call uncompiled,$(patsubst $(BUILDDIR)/pu
 
 # (callable) Get the installed locations for the given source files.
 override installed = $(foreach file,$1,$(DESTDIR)/$(call destination,$(file)))
 
 # (callable) Get the installed locations for the given source files.
 override installed = $(foreach file,$1,$(DESTDIR)/$(call destination,$(file)))

-endif

 
 # ─ ¶ Recipe Variable Definitions ─────────────────────────────────────
 
 
 # ─ ¶ Recipe Variable Definitions ─────────────────────────────────────
 


@@ -519,6 +522,9 @@ override wrapplaintext = { $(PRINTF) '%s\n%s' '<?xml version="1.0"?>' '<script x
 # This isn’t a perfect substitution (it makes some assumptions about the format of the underlying X·M·L), but it should be workable for most sensible, welformed files.
 override serializexml = $(SED) "$$($(PRINTF) '%b' '/<?xml[ \t]\\{1,\\}version=[\0042\0047]1.1/,$${ s/<?xml[^>]*?>/<!--<?xml version=\00421.1\0042?>-->/\n s/&\0043x0*[12345678BCEFbcef];/\0302\0221/g\n s/&\0043x0*1[0123456789ABCDEFabcdef];/\0302\0221/g\n s/&\00430*[12345678];/\0302\0221/g\n s/&\00430*1[12456789];/\0302\0221/g\n s/&\00430*2[0123456789];/\0302\0221/g\n s/&\00430*3[01];/\0302\0221/g\n}')" <$(call quote,$1) | $(SED) "$$($(PRINTF) '%b' ':a\n/^\\n*$$/{ $$d\n N\n ba\n}')"
 
 # This isn’t a perfect substitution (it makes some assumptions about the format of the underlying X·M·L), but it should be workable for most sensible, welformed files.
 override serializexml = $(SED) "$$($(PRINTF) '%b' '/<?xml[ \t]\\{1,\\}version=[\0042\0047]1.1/,$${ s/<?xml[^>]*?>/<!--<?xml version=\00421.1\0042?>-->/\n s/&\0043x0*[12345678BCEFbcef];/\0302\0221/g\n s/&\0043x0*1[0123456789ABCDEFabcdef];/\0302\0221/g\n s/&\00430*[12345678];/\0302\0221/g\n s/&\00430*1[12456789];/\0302\0221/g\n s/&\00430*2[0123456789];/\0302\0221/g\n s/&\00430*3[01];/\0302\0221/g\n}')" <$(call quote,$1) | $(SED) "$$($(PRINTF) '%b' ':a\n/^\\n*$$/{ $$d\n N\n ba\n}')"
 

+# (callable) Wraps the provided shell script in a conditional which checks whether a make restart caused by `$(BUILDDIR)/.update-types´ is imminent (i·e, it was created during the course of this run) and only executes the script if it is not.
+override unlesstypeswillupdate = $(if $(call not,$(typeupdates)),if $(TEST) ! -e $(call quote,$(BUILDDIR)/.update-types); then ,)$1$(and $(call not,$(typeupdates)),; fi)
+

 # ─ ¶ Phony Targets ───────────────────────────────────────────────────
 
 # Compile all files, or error if any are recursive.
 # ─ ¶ Phony Targets ───────────────────────────────────────────────────
 
 # Compile all files, or error if any are recursive.


@@ -571,37 +577,12 @@ FORCE : ;
 # Phony rules; always consider these out·of·date.
 .PHONY : FORCE all default clean gone info install list listout uninstall $(call built,$(recursivefiles)) ;
 
 # Phony rules; always consider these out·of·date.
 .PHONY : FORCE all default clean gone info install list listout uninstall $(call built,$(recursivefiles)) ;
 

-ifneq ($(typeupdates)$(wildcard $(BUILDDIR)/dependencies)$(wildcard $(BUILDDIR)/destinations),)
-# Reload this make·file if the dependency graph or output destinations have changed.
-#
-# The dependency graph and output destinations are used to set the values of variables in this make·file, so it’s important to ensure that they are actually up·to·date prior to executing any later rules.
-#
-# This recipe only exists after types have been updated or when the dependency graph or destinations file already exists.
-#
-# ※ There is a chance that generating the dependencies will also update the parsers.
-$(THISDIR)/GNUmakefile :: $(BUILDDIR)/dependencies $(BUILDDIR)/destinations
-       $(silent)$(TOUCH) $(THISDIR)/GNUmakefile
-ifeq ($(typeupdates),)
-       $(call inform,if $(TEST) ! -f $(call quote,$(BUILDDIR)/.update-types); then $(PRINTF) '%b\n' '\0033[1mDependency graph and output destinations updated. Restarting…\0033[22m' >&2; fi)
-else
-       $(silent)$(RM) $(call quote,$(BUILDDIR)/.update-types)
-       $(call inform,$(PRINTF) '%b\n' '\0033[1mDependency graph and output destinations updated. Restarting…\0033[22m' >&2)
-endif
-endif
-
-ifeq ($(typeupdates),)
-# Reload this make·file if any of the magic files or parsers have changed.
+# Reload this make·file if the magic file, parser, dependencies, or destinations have changed.

 #
 #

-# These are used to classify source files, so if they have changed then the make·file must be reloaded.
-#
-# This recipe sleeps for one second to ensure that files built after the restart have a more current time·stamp.
-$(THISDIR)/GNUmakefile :: $(BUILDDIR)/magic.mgc $(BUILDDIR)/parser.xslt
+# If the magic file or parser changed, then another restart will be required, as the dependencies and destinations will need to be regenerated.
+$(THISDIR)/GNUmakefile : $(BUILDDIR)/magic.mgc $(BUILDDIR)/parser.xslt $(BUILDDIR)/dependencies $(BUILDDIR)/destinations

        $(silent)$(TOUCH) $(THISDIR)/GNUmakefile
        $(silent)$(TOUCH) $(THISDIR)/GNUmakefile

-       $(silent)$(RM) -f $(call quote,$(BUILDDIR)/dependencies) $(call quote,$(BUILDDIR)/destinations)
-       $(call inform,$(PRINTF) '%b\n' '\0033[1mMagic file or parsers have updated. Restarting…\0033[22m' >&2)
-       $(silent)$(SLEEP) 1
-       $(silent)$(TOUCH) $(call quote,$(BUILDDIR)/.update-types)
-endif
+       $(if $(filter $(BUILDDIR)/magic.mgc $(BUILDDIR)/parser.xslt,$?),$(call inform,$(PRINTF) '%b\n' '\0033[1mMagic file or parsers have updated. Restarting…\0033[22m' >&2)$(newline)$(silent)$(SLEEP) 1,$(if $(typeupdates),$(silent)$(RM) $(call quote,$(BUILDDIR)/.update-types)$(newline),)$(call inform,$(PRINTF) '%b\n' '\0033[1mDependency graph and output destinations updated. Restarting…\0033[22m' >&2))

 
 # ─ ¶ Build Targets ───────────────────────────────────────────────────
 
 
 # ─ ¶ Build Targets ───────────────────────────────────────────────────
 


@@ -631,39 +612,32 @@ $(BUILDDIR)/parser.xslt : $(BUILDDIR)/parser.catalog $(THISDIR)/lib/catalog2pars
        $(silent)$(TOUCH) $(call quote,$(BUILDDIR)/.update-types)
 
 # Generate R·D·F metadata for files.
        $(silent)$(TOUCH) $(call quote,$(BUILDDIR)/.update-types)
 
 # Generate R·D·F metadata for files.

-$(call metadata,$(sourcefiles) $(sourceincludes)) : % : $$(call datadata,$$@) $(typeupdates)
-       $(call inform,$(PRINTF) '%s\n' $(call quote,Generating metadata for `$<´…) >&2)
-       $(silent)$(call ensuredirectory,$(dir $@))
-       $(silent){ if $(TEST) ! -f $(call quote,$(BUILDDIR)/.mtime); then $(PRINTF) '%b' '\n' >|$(call quote,$(BUILDDIR)/.mtime); fi; $(TOUCH) -r $(call quote,$<) $(call quote,$(BUILDDIR)/.mtime); $(DIFF) -u $(call quote,$(BUILDDIR)/.mtime) /dev/null | $(SED) '1!d;s/.*   \([^ ]*\) \([^ ]*\).*$$/\1T\2Z/'; $(CKSUM) $(call quote,$<) | $(SED) 's/[ ].*//'; } | $(xargsmultiquote) | $(XARGS) -E '' $(PRINTF) '<?xml version="1.0"?><nfo:LocalFileDataObject xmlns:dct="http://purl.org/dc/terms/" xmlns:nie="http://www.semanticdesktop.org/ontologies/2007/01/19/nie#" xmlns:nfo="http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" rdf:about="%s" nfo:fileName="%s" nfo:fileUrl="%s"><nie:interpretedAs>$(if $(filter $<,$(assetfiles)),<nfo:InformationElement nie:mimeType="%s"/>,<nfo:PlainTextDocument nie:mimeType="%s"/>)</nie:interpretedAs><dct:hasFormat><nfo:LocalFileDataObject nfo:fileUrl="%s"><nie:interpretedAs><nfo:PlainTextDocument nie:mimeType="application/xml"/></nie:interpretedAs></nfo:LocalFileDataObject></dct:hasFormat><nfo:fileLastModified rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">%s</nfo:fileLastModified><nfo:hasHash nfo:hashAlgorithm="CRC32" nfo:hashValue="%s"/></nfo:LocalFileDataObject>' $(call quote,$(call attresc,$(call localuri,$<))) $(call quote,$(call attresc,$(notdir $<))) $(call quote,$(call attresc,$(call fileuri,$<))) $(call quote,$(call attresc,$(call typeoffile,$<))) $(call quote,$(call attresc,$(call fileuri,$(call parsed,$<)))) >|$(call quote,$@)
+#
+# This “depends” on `$(THISDIR)/lib/expandmetadata.xslt´ not because it is an actual dependency, but because a change to that file strongly suggests a change to these rules has occurred as well.
+#
+# If the types have been updated but `typeupdates´ is not active, this recipe is skipped because a restart is forthcoming.
+$(call metadata,$(sourcefiles) $(sourceincludes)) : % : $$(call datadata,$$@) $(THISDIR)/lib/expandmetadata.xslt $(typeupdates)
+       $(call inform,$(call unlesstypeswillupdate,$(PRINTF) '%s\n' $(call quote,Generating metadata for `$<´…) >&2))
+       $(silent)$(call unlesstypeswillupdate,$(call ensuredirectory,$(dir $@)); { if $(TEST) ! -f $(call quote,$(BUILDDIR)/.mtime); then $(PRINTF) '%b' '\n' >|$(call quote,$(BUILDDIR)/.mtime); fi; $(TOUCH) -r $(call quote,$<) $(call quote,$(BUILDDIR)/.mtime); $(DIFF) -u $(call quote,$(BUILDDIR)/.mtime) /dev/null | $(SED) '1!d;s/.*   \([^ ]*\) \([^ ]*\).*$$/\1T\2Z/'; $(CKSUM) $(call quote,$<) | $(SED) 's/[ ].*//'; } | $(xargsmultiquote) | $(XARGS) -E '' $(PRINTF) '<?xml version="1.0"?><书社vocab:$(if $(filter $<,$(sourceincludes)),IncludeFile,SourceFile) xmlns:nie="http://www.semanticdesktop.org/ontologies/2007/01/19/nie#" xmlns:nfo="http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:书社vocab="urn:fdc:ladys.computer:20231231:Shu1She4:vocab:" rdf:about="%s" 书社vocab:path="%s"><nie:interpretedAs>$(if $(filter $<,$(assetfiles)),<nfo:InformationElement nie:mimeType="%s"/>,<nfo:PlainTextDocument nie:mimeType="%s"/>)</nie:interpretedAs><nfo:fileLastModified rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">%s</nfo:fileLastModified><nfo:hasHash nfo:hashAlgorithm="CRC32" nfo:hashValue="%s"/></书社vocab:$(if $(filter $<,$(sourceincludes)),IncludeFile,SourceFile)>' $(call quote,$(call attresc,$(call localuri,$<))) $(call quote,$(call attresc,$(if $(filter $<,$(sourceincludes)),$(call includepath,$<),$(call sourcepath,$<)))) $(call quote,$(call attresc,$(call typeoffile,$<))) >|$(call quote,$@))

 
 # Parse the files.
 #
 # Even plain X·M·L files are parsed, because they may contain X·H·T·M·L `<script>´ elements which contain other kinds of data.
 # Asset files are turned into H·T·M·L embeds pointing to `data:´ U·R·I’s.
 
 # Parse the files.
 #
 # Even plain X·M·L files are parsed, because they may contain X·H·T·M·L `<script>´ elements which contain other kinds of data.
 # Asset files are turned into H·T·M·L embeds pointing to `data:´ U·R·I’s.

+#
+# If the types have been updated but `typeupdates´ is not active, this recipe is skipped because a restart is forthcoming.

 $(call parsed,$(sourcefiles) $(sourceincludes)) : % : $$(call unparsed,$$@) $(BUILDDIR)/parser.xslt $(typeupdates)
 $(call parsed,$(sourcefiles) $(sourceincludes)) : % : $$(call unparsed,$$@) $(BUILDDIR)/parser.xslt $(typeupdates)

-       $(call inform,$(PRINTF) '%s\n' $(call quote,Processing `$<´…) >&2)
-       $(silent)$(call ensuredirectory,$(dir $@))
-       $(silent)$(if $(filter $<,$(assetfiles)),$(PRINTF) '%s\n' $(call quote,<?xml version="1.0"?><object xmlns="http://www.w3.org/1999/xhtml" type="$(call typeoffile,$<)" data="$(call datauri,$<)"/>) >|$(call quote,$@),$(if $(filter $<,$(plaintextfiles)),$(call wrapplaintext,$<),$(call serializexml,$<)) | $(XSLTPROC) --nonet --novalid --nomkdir --nowrite --stringparam BUILDTIME $$($(DATE) -u '+%Y-%m-%dT%H:%M:%SZ') --stringparam IDENTIFIER $(call quote,$(call localuri,$<))$(if $(THISREV), --stringparam THISREV $(call quote,$(THISREV)),)$(if $(SRCREV), --stringparam SRCREV $(call quote,$(SRCREV)),) $(call quote,$(BUILDDIR)/parser.xslt) - >|$(call quote,$@))
+       $(call inform,$(call unlesstypeswillupdate,$(PRINTF) '%s\n' $(call quote,Processing `$<´…) >&2))
+       $(silent)$(call unlesstypeswillupdate,$(call ensuredirectory,$(dir $@)); $(if $(filter $<,$(assetfiles)),$(PRINTF) '%s\n' $(call quote,<?xml version="1.0"?><object xmlns="http://www.w3.org/1999/xhtml" type="$(call typeoffile,$<)" data="$(call datauri,$<)"/>) >|$(call quote,$@),$(if $(filter $<,$(plaintextfiles)),$(call wrapplaintext,$<),$(call serializexml,$<)) | $(XSLTPROC) --nonet --novalid --nomkdir --nowrite --stringparam BUILDTIME $$($(DATE) -u '+%Y-%m-%dT%H:%M:%SZ') --stringparam IDENTIFIER $(call quote,$(call localuri,$<))$(if $(THISREV), --stringparam THISREV $(call quote,$(THISREV)),)$(if $(SRCREV), --stringparam SRCREV $(call quote,$(SRCREV)),) $(call quote,$(BUILDDIR)/parser.xslt) - >|$(call quote,$@)))

 
 

-# Collect the metadata into a single file.
-$(BUILDDIR)/metadata : $(call diffprereqs,metadatas,$(call metadata,$(sort $(sourcefiles) $(sourceincludes))))
-       $(call inform,$(PRINTF) '%s\n' 'Compiling metadata…' >&2)
-       $(silent){ $(PRINTF) '%s' '<?xml version="1.0"?><rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">'; $(foreach meta,$(call metadata,$(sort $(sourcefiles) $(sourceincludes))),$(CAT) $(call quote,$(meta)) | $(SED) 's/<?xml version="1.0"?>//';) $(PRINTF) '%s\n' '</rdf:RDF>'; } >|$(call quote,$@)
-
-# Build a list of dependencies for each parsed file.
-$(BUILDDIR)/dependencies : $(BUILDDIR)/metadata $(call parsed,$(filter-out $(assetfiles),$(sourcefiles) $(sourceincludes))) $(THISDIR)/lib/metadata2dependencies.xslt
-       $(call inform,$(PRINTF) '%s\n' 'Identifying dependencies…' >&2)
-       $(silent)$(TOUCH) $(call quote,$@)
-       $(silent)$(XSLTPROC) --nonet --novalid --nomkdir --nowrite $(call quote,$(THISDIR)/lib/metadata2dependencies.xslt) $(call quote,$<) >|$(call quote,$@)
-
-# Generate a catalog of destinations for files.
+# Collect the metadata into a single file, and generate the dependencies and destinations files as side·effects.
+#
+# Doing this all in one step reduces the number of calls to `xsltproc´ required, but requires that it be called from the build directory (necessitating a subshell).

 #
 #

-# This depends on parsing non·asset source files, but not assets or includes.
-# It does not require knowing the dependencies.
-$(BUILDDIR)/destinations : $(BUILDDIR)/metadata $(call parsed,$(filter-out $(assetfiles),$(sourcefiles))) $(THISDIR)/lib/metadata2destinations.xslt
-       $(call inform,$(PRINTF) '%s\n' 'Identifying output destinations…' >&2)
-       $(silent)$(TOUCH) $(call quote,$@)
-       $(silent)$(XSLTPROC) --nonet --novalid --nomkdir --nowrite $(call quote,$(THISDIR)/lib/metadata2destinations.xslt) $(call quote,$<) >|$(call quote,$@)
+# If the types have been updated but `typeupdates´ is not active, this recipe is skipped because a restart is forthcoming.
+$(BUILDDIR)/dependencies $(BUILDDIR)/destinations $(BUILDDIR)/metadata : $(call diffprereqs,metadatas,$(call metadata,$(sort $(sourcefiles) $(sourceincludes)))) $(call parsed,$(filter-out $(assetfiles),$(sourcefiles) $(sourceincludes))) $(THISDIR)/lib/expandmetadata.xslt
+       $(call inform,$(call unlesstypeswillupdate,$(PRINTF) '%s\n' 'Compiling metadata…' >&2))
+       $(silent)$(call unlesstypeswillupdate,{ $(PRINTF) '<?xml version="1.0"?><rdf:RDF xmlns:nie="http://www.semanticdesktop.org/ontologies/2007/01/19/nie#" xmlns:nfo="http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:书社vocab="urn:fdc:ladys.computer:20231231:Shu1She4:vocab:"><书社vocab:BuildDirectory nfo:fileUrl="%s"/>' $(call quote,$(call attresc,$(call fileuri,$(BUILDDIR)))); {$(foreach meta,$(call metadata,$(sort $(sourcefiles) $(sourceincludes))), $(CAT) $(call quote,$(meta));) } | $(SED) 's/<?xml version="1.0"?>//g'; $(PRINTF) '%s\n' '</rdf:RDF>'; } | ( $(CD) $(call quote,$(BUILDDIR)); $(XSLTPROC) --nonet --novalid --nomkdir $(call quote,$(abspath $(THISDIR)/lib/expandmetadata.xslt)) - ) | $(XMLLINT) --nonet --nsclean - >|$(call quote,$(BUILDDIR)/metadata))

 
 # Generate the main transform.
 $(BUILDDIR)/transform.catalog : $(call diffprereqs,transforms,$(sort $(TRANSFORMS)))
 
 # Generate the main transform.
 $(BUILDDIR)/transform.catalog : $(call diffprereqs,transforms,$(sort $(TRANSFORMS)))


@@ -672,13 +646,13 @@ $(BUILDDIR)/transform.catalog : $(call diffprereqs,transforms,$(sort $(TRANSFORM
        $(foreach transform,$(TRANSFORMS),$(silent){ $(call id,$(transform)); $(PRINTF) '%s\n' $(call quote,$(call fileuri,$(transform))) '--noout' $(call quote,$@); } | $(xargsmultiquote) | $(XARGS) -E '' $(XMLCATALOG) --add uri$(newline))
 $(BUILDDIR)/transform.xslt : $(BUILDDIR)/transform.catalog $(BUILDDIR)/metadata $(THISDIR)/lib/catalog2transform.xslt
        $(call inform,$(PRINTF) '%s\n' 'Generating main transform…' >&2)
        $(foreach transform,$(TRANSFORMS),$(silent){ $(call id,$(transform)); $(PRINTF) '%s\n' $(call quote,$(call fileuri,$(transform))) '--noout' $(call quote,$@); } | $(xargsmultiquote) | $(XARGS) -E '' $(XMLCATALOG) --add uri$(newline))
 $(BUILDDIR)/transform.xslt : $(BUILDDIR)/transform.catalog $(BUILDDIR)/metadata $(THISDIR)/lib/catalog2transform.xslt
        $(call inform,$(PRINTF) '%s\n' 'Generating main transform…' >&2)

-       $(silent)$(XSLTPROC) --nonet --novalid --nomkdir --nowrite --stringparam METADATA $(call quote,$(call fileuri,$(BUILDDIR)/metadata)) $(call quote,$(THISDIR)/lib/catalog2transform.xslt) $(call quote,$<) >|$(call quote,$@)
+       $(silent)$(XSLTPROC) --nonet --novalid --nomkdir --nowrite --stringparam METADATA $(call quote,$(call fileuri,$(BUILDDIR))/metadata) $(call quote,$(THISDIR)/lib/catalog2transform.xslt) $(call quote,$<) >|$(call quote,$@)

 
 # Compile the result files using the dependencies as necessary.
 $(call compiled,$(compilablefiles)) : $(BUILDDIR)/results/% : $$(call parsed,$$(call uncompiled,$$@)) $$(call parsed,$$(call dependencies,$$(call uncompiled,$$@))) $(BUILDDIR)/transform.xslt $(BUILDDIR)/metadata
        $(call inform,$(PRINTF) '%s\n' $(call quote,Compiling </$*>…) >&2)
        $(silent)$(call ensuredirectory,$(dir $@))
 
 # Compile the result files using the dependencies as necessary.
 $(call compiled,$(compilablefiles)) : $(BUILDDIR)/results/% : $$(call parsed,$$(call uncompiled,$$@)) $$(call parsed,$$(call dependencies,$$(call uncompiled,$$@))) $(BUILDDIR)/transform.xslt $(BUILDDIR)/metadata
        $(call inform,$(PRINTF) '%s\n' $(call quote,Compiling </$*>…) >&2)
        $(silent)$(call ensuredirectory,$(dir $@))

-       $(silent)$(XSLTPROC) --nonet --novalid --nomkdir --nowrite --stringparam METADATA 'metadata' --stringparam BUILDTIME $$($(DATE) -u '+%Y-%m-%dT%H:%M:%SZ') --stringparam IDENTIFIER $(call quote,$(call localuri,$(call uncompiled,$@))) --stringparam PATH $(call quote,/$*)$(if $(THISREV), --stringparam THISREV $(call quote,$(THISREV)),)$(if $(SRCREV), --stringparam SRCREV $(call quote,$(SRCREV)),) $(call quote,$(BUILDDIR)/transform.xslt) $(call quote,$<) >|$(call quote,$@)
+       $(silent)$(XSLTPROC) --nonet --novalid --nomkdir --nowrite --stringparam METADATA 'metadata' --stringparam BUILDTIME $$($(DATE) -u '+%Y-%m-%dT%H:%M:%SZ') --stringparam IDENTIFIER $(call quote,$(call localuri,$(call uncompiled,$@)))$(if $(THISREV), --stringparam THISREV $(call quote,$(THISREV)),)$(if $(SRCREV), --stringparam SRCREV $(call quote,$(SRCREV)),) $(call quote,$(BUILDDIR)/transform.xslt) $(call quote,$<) >|$(call quote,$@)

 
 # Create the final files from the compiled results (or error in the case of recursive ones).
 $(call built,$(compilablefiles)) : $(BUILDDIR)/public/% : $(BUILDDIR)/results/%
 
 # Create the final files from the compiled results (or error in the case of recursive ones).
 $(call built,$(compilablefiles)) : $(BUILDDIR)/public/% : $(BUILDDIR)/results/%