X-Git-Url: https://git.ladys.computer/Shushe/blobdiff_plain/884130a52be6bfe21e524498385cb6486495b383..refs/heads/current:/GNUmakefile?ds=inline

diff --git a/GNUmakefile b/GNUmakefile
index 3d4bf87..f7809ed 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -149,11 +149,21 @@ SRCDIR := sources
 # Multiple directories can be given so long as files with the same name do not exist in each.
 #
 # These can be inside of `SRCDIR´ directories if desired.
+#
+# This variable is also used by the two‐stage `MODE´, where it gives the include directory for the second stage.
 INCLUDEDIR := $(foreach dir,$(SRCDIR),$(dir)/includes)
 
+# The directory which contains the data files.
+#
+# Only used in the two‐stage `MODE´, and defaults to that `MODE´ if this directory exists.
+# This directory is used as the include directory in the first stage.
+#
+# Multiple directories can be given so long as files with the same name do not exist in each.
+DATADIR :=
+
 # The directory in which to generate temporary buildfiles.
 #
-# This variable is also used by the archiving `MODE´.
+# This variable is also used by the archiving and two‐stage `MODE´s.
 BUILDDIR := build
 
 # The directory into which to output files on `make install´.
@@ -165,17 +175,28 @@ DESTDIR := public
 #
 # By default, this is inferred from the variable `MAKEFILE_LIST´.
 #
-# This variable is also used by the archiving `MODE´.
+# This variable is also used by the archiving and two‐stage `MODE´s.
 THISDIR := $(patsubst %/,%,$(dir $(lastword $(MAKEFILE_LIST))))
 
 # Configuration of `find´.
 #
 # By default, `find´ will ignore files which begin with a period and those which are likely to cause problems for `make´.
+#
+# These variables are also used by the two‐stage `MODE´.
 EXTRAFINDRULES :=
 EXTRAFINDINCLUDERULES :=
-FINDRULES := ! '(' '(' -name '[.-]*' -a ! -name '.' -o -name '*[][*?:|$$%\#\\; ]*' -o -name '*[)]' ')' -a -prune ')'$(if $(EXTRAFINDRULES), -a '(' $(EXTRAFINDRULES) ')',)
+FINDRULES := '!' '(' '(' -name '[.-]*' -a '!' -name '.' -o -name '*[][*?:|$$%\#\\; ]*' -o -name '*[)]' ')' -a -prune ')'$(if $(EXTRAFINDRULES), -a '(' $(EXTRAFINDRULES) ')',)
 FINDINCLUDERULES := $(FINDRULES)$(if $(EXTRAFINDINCLUDERULES), -a '(' $(EXTRAFINDINCLUDERULES) ')',)
 
+# File extensions which indicate files in `SRCDIR´ which should be built as part of the first, rather than second, stage of the two‐stage `MODE´.
+DATAEXT := rdf
+
+# Rules for identifying files in `SRCDIR´ which should be built as part of the first, rather than second, stage of the two‐stage `MODE´.
+#
+# By default, this just constructs rules from `DATAEXT´.
+EXTRAFINDDATARULES :=
+FINDDATARULES := -name '.' $(foreach ext,$(DATAEXT), -o -name '$(subst ','"'"',[!.]*.$(ext))')$(if $(EXTRAFINDDATARULES), -a '(' $(EXTRAFINDDATARULES) ')',)
+
 # The list of magic files to use when determining media types.
 #
 # Some are provided as part of this repository, but you can add more if you need different media type detection.
@@ -233,11 +254,14 @@ endif
 # The following modes are available :—
 #
 # • ‹ urn:fdc:ladys.computer:20231231:Shu1She4:mode:default ›:
-#   The default mode; typical Shushe behaviours.
+#   The default mode; typical ⛩📰 书社 behaviours.
 #
 # • ‹ urn:fdc:ladys.computer:20231231:Shu1She4:mode:archive ›:
 #   Generates archive files from parse results.
-MODE := urn:fdc:ladys.computer:20231231:Shu1She4:mode:default
+#
+# • ‹ urn:fdc:ladys.computer:20231231:Shu1She4:mode:initial ›:
+#   The initial mode that this make·file starts in; this builds the magic file and parsers and then recursively calls into the default mode to build the files.
+MODE := urn:fdc:ladys.computer:20231231:Shu1She4:mode:initial
 
 # Set to a non·empty value to silence informative messages.
 QUIET :=
@@ -287,6 +311,51 @@ override not = $(if $1,,1)
 # (callable) Quote the given string for use within shell calls.
 override quote = '$(subst ','"'"',$1)'
 
+# The command to use for percent‐decoding.
+override perdeccmd := $(SED) 's/|/%7C/g;s/[\]/%5C/g;s/%[0123456789ABCDEFabcdef]\{2\}/|&|/g' | $(TR) '|' '\n' | $(SED) '/^%[0123456789ABCDEFabcdef]\{2\}$$/!s/%/|%25|/' | $(TR) '|' '\n' | $(AWK) '$$0!~/%/{printf "%s",$$0}/%/{d="0123456789ABCDEF";v=substr(toupper($$0),2,2);printf "\\%04o",(index(d,substr(v,1,1))-1)*16+index(d,substr(v,2,1))-1}' | $(SED) $(call quote,s/'/'"'"'/g;s/^/'/;s/$$/'/;$$!s/$$/\\/) | $(XARGS) -E '' $(PRINTF) '%b'
+
+# (callable) Percent‐decode the given strings.
+#
+# ☡ This variable creates a subshell every time it is computed.
+override perdec = $(shell $(PRINTF) '%s\0450A' $(foreach encoded,$1,$(call quote,$(encoded))) | $(perdeccmd))
+
+# (callable) Percent‐encode the given strings.
+#
+# This singly‐encodes u·r·i characters and doubly‐encodes other characters, then calls `perdec´ to decode back to a single encoding.
+# The encoding assumes the input is a “u·r·i component”; e·g that the resulting string should only contain `pchar´ (but can contain any `sub-delim´).
+#
+# It is assumed that the given strings do not contain newlines.
+#
+# ☡ This variable creates a subshell every time it is computed.
+override perenc = $(shell $(PRINTF) '%s\n' $(foreach unencoded,$1,$(call quote,$(unencoded))) | $(OD) -t x1 | $(SED) 's/^[0123456789]*//;s/0[Aa]/%&/g;s/2[146789ABCDEabcde]/%&/g;s/3[0123456789AaBbDd]/%&/g;s/40/%&/g;s/[46][123456789ABCDEFabcdef]/%&/g;s/[57][0123456789Aa]/%&/g;s/5[Ff]/%&/g;s/7[Ee]/%&/g;s/[ ][0123456789ABCDEFabcdef]\{2\}/%25&/g' | $(TR) -d ' \n' | $(TR) 'abcdef' 'ABCDEF' | $(perdeccmd))
+
+# (callable) Percent‐encode each component in the given paths.
+#
+# ☡ This variable creates a subshell every time it is computed.
+override pathenc = $(subst %2F,/,$(call perenc,$1))
+
+# (callable) Create a unique name for the given file, based on its absolute path.
+#
+# ☡ This variable creates a subshell every time it is computed.
+namehash = $(shell $(PRINTF) '%s' $(call quote,$(abspath $1)) | $(CKSUM) | $(SED) 's/ .*//' | $(XARGS) -E '' $(PRINTF) '%X')-$(notdir $1)
+
+# The location of this make·file.
+override makefile := $(abspath $(THISDIR)/GNUmakefile)
+
+# Non·empty if `help´ or `clean´, and no targets other than `help´ or `clean´, were specified as goals on the commandline.
+override notbuilding := $(and $(filter help clean,$(MAKECMDGOALS)),$(call not,$(filter-out help clean,$(MAKECMDGOALS))))
+
+# (callable) Tests to see if the prerequisites provided by the second argument matches the value in the file corresponding to the first argument in `$(BUILDDIR)/lastprereqs´.
+# If not, saves the new value.
+# Returns the values plus the file in `$(BUILDDIR)/lastprereqs´, which will always be newer than the target if there was a change.
+#
+# Calling this variable is useful when a given target should be updated whenever its list of prerequisites changes in addition to whenever there is a change to one of its prerequisites.
+#
+# If `$(notbuilding)´ is non·empty, this variable produces no result to avoid unnecessary work.
+#
+# ☡ This variable creates at least one subshell every time it is computed.
+override diffprereqs = $(if $(notbuilding),,$(and $(subst $(shell $(CAT) $(call quote,$(BUILDDIR)/lastprereqs/$1) 2>>/dev/null || :),,$2),$(shell $(call ensuredirectory,$(BUILDDIR)/lastprereqs) && $(PRINTF) '%s\n' $(call quote,$2) >|$(BUILDDIR)/lastprereqs/$1),)$2 $(BUILDDIR)/lastprereqs/$1)
+
 # ─ ¶ Recipe Variable Definitions ─────────────────────────────────────
 
 # Outputs an `@´ to silence rules, unless `VERBOSE´ is non·empty.
@@ -301,19 +370,22 @@ override ensuredirectory = if $(TEST) ! -d $(call quote,$1); then $(MKDIR) -p $(
 # Quote standard input in such a way that piping it to xargs will result in it being processed as a single argument.
 #
 # If standard input ends in a newline, it is stripped; all other newlines are preserved.
-override xargsquote = $(SED) $(call quote,s/'/'"'"'/g;s/^/'/;s/$$/'/;$$!s/$$/\\/)
+override xargsquote := $(SED) $(call quote,s/'/'"'"'/g;s/^/'/;s/$$/'/;$$!s/$$/\\/)
 
 # Quote standard input in such a way that piping it to xargs will result in each line being processed as a single argument.
-override xargsmultiquote = $(SED) $(call quote,s/'/'"'"'/g;s/^/'/;s/$$/'/)
+override xargsmultiquote := $(SED) $(call quote,s/'/'"'"'/g;s/^/'/;s/$$/'/)
 
 # (callable) Test if the provided xpath expression matches the provided document.
 override xpath = $(XMLLINT) --noent --nonet --xpath $(call quote,$1) $(call quote,$2) >>/dev/null 2>>/dev/null
 
+# (callable) Get the identifier for the given parser or transform.
+override id = $(XMLLINT) --noent --nonet --xpath '/*/*[local-name()="id" and namespace-uri()="urn:fdc:ladys.computer:20231231:Shu1She4"]/text()[1]' $(call quote,$1) 2>>/dev/null || $(PRINTF) '%s\n' $(call quote,about:shushe?$(or $2,unknown)=$(call pathenc,$(basename $(notdir $1))))
+
 # (callable) Extract the value of the text nodes in the provided X·M·L document and print them to `stdout´.
 override extracttext = $(PRINTF) '%s' '<transform xmlns="http://www.w3.org/1999/XSL/Transform" version="1.0"><output method="text" encoding="UTF-8"/></transform>' | $(XSLTPROC) --nonet --novalid --nomkdir --nowrite - $(call quote,$1)
 
 # (callable) Process the provided transformation result and output the result to the provided location, given the provided relative path.
-override processresultto = if $(call xpath,/*[local-name()="raw-text" and namespace-uri()="urn:fdc:ladys.computer:20231231:Shu1She4"],$1); then $(call extracttext,$1) >|$(call quote,$2); elif $(call xpath,/*[local-name()="base64-binary" and namespace-uri()="urn:fdc:ladys.computer:20231231:Shu1She4"],$1); then { $(PRINTF) '%s\n' 'begin-base64 644 -'; $(call extracttext,$1) | $(TR) -d '\t\n\f\r '; $(PRINTF) '\n%s\n' '===='; } | $(UUDECODE) -o /dev/stdout >|$(call quote,$2); elif $(call xpath,/*[local-name()="archive" and namespace-uri()="urn:fdc:ladys.computer:20231231:Shu1She4"],$1); then $(MAKE) -f $(call quote,$(abspath $(THISDIR)/GNUmakefile)) NAME=$(call quote,$3) SRC=$(call quote,$1) BUILDDIR=$(call quote,$(BUILDDIR)/archive/$3) DESTDIR=$(call quote,$(patsubst %/,%,$(dir $2))) MODE='urn:fdc:ladys.computer:20231231:Shu1She4:mode:archive' $(call quote,$2); else $(FINALIZE) $(call quote,$1) >|$(call quote,$2); fi
+override processresultto = if $(call xpath,/*[local-name()="raw-text" and namespace-uri()="urn:fdc:ladys.computer:20231231:Shu1She4"],$1); then $(call extracttext,$1) >|$(call quote,$2); elif $(call xpath,/*[local-name()="base64-binary" and namespace-uri()="urn:fdc:ladys.computer:20231231:Shu1She4"],$1); then { $(PRINTF) '%s\n' 'begin-base64 644 -'; $(call extracttext,$1) | $(TR) -d '\t\n\f\r '; $(PRINTF) '\n%s\n' '===='; } | $(UUDECODE) -o /dev/stdout >|$(call quote,$2); elif $(call xpath,/*[local-name()="archive" and namespace-uri()="urn:fdc:ladys.computer:20231231:Shu1She4"],$1); then $(MAKE) -f $(makefile) NAME=$(call quote,$3) SRC=$(call quote,$1) BUILDDIR=$(call quote,$(BUILDDIR)/archive/$3) DESTDIR=$(call quote,$(patsubst %/,%,$(dir $2))) MODE='urn:fdc:ladys.computer:20231231:Shu1She4:mode:archive' $(call quote,$2); else $(FINALIZE) $(call quote,$1) >|$(call quote,$2); fi
 
 # ━ § BEGIN DEFAULT MAKE·FILE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
 
@@ -321,20 +393,6 @@ ifeq ($(MODE),urn:fdc:ladys.computer:20231231:Shu1She4:mode:default)
 
 # ─ ¶ Non‐Recipe Variable Definitions ─────────────────────────────────
 
-# Non·empty if `help´ or `clean´, and no targets other than `help´ or `clean´, were specified as goals on the commandline.
-override notbuilding := $(and $(filter help clean,$(MAKECMDGOALS)),$(call not,$(filter-out help clean,$(MAKECMDGOALS))))
-
-# (callable) Test to see if the prerequisites provided by the second argument matches the value in the file corresponding to the first argument in `$(BUILDDIR)/lastprereqs´.
-# If not, save the new value and then add FORCE.
-# Return them regardless.
-#
-# Calling this variable is useful when a given target should be updated whenever its list of prerequisites changes in addition to whenever there is a change to one of its prerequisites.
-#
-# If `$(notbuilding)´ is non·empty, this variable produces no result to avoid unnecessary work.
-#
-# ☡ This variable creates at least one subshell every time it is computed.
-override diffprereqs = $(if $(notbuilding),,$(if $(subst $(shell $(CAT) $(call quote,$(BUILDDIR)/lastprereqs/$1) 2>>/dev/null || :),,$2),$2 FORCE$(and $(shell $(call ensuredirectory,$(BUILDDIR)/lastprereqs) && $(PRINTF) '%s\n' $(call quote,$2) >|$(BUILDDIR)/lastprereqs/$1),),$2))
-
 # (callable) Escape special characters for use in X·M·L.
 override xmlesc = $(subst >,&gt;,$(subst <,&lt;,$(subst &,&amp;,$1)))
 
@@ -344,34 +402,6 @@ override attresc = $(subst ",&quot;,$(call xmlesc,$1))
 # (callable) Escape special characters for use in sed regular expressions.
 override sedesc = $(subst /,[/],$(subst $$,\$$,$(subst *,\*,$(subst .,\.,$(subst [,\[,$(subst ^,\^,$(subst \,\\,$1)))))))
 
-# The command to use for percent‐decoding.
-override perdeccmd := $(SED) 's/|/%7C/g;s/[\]/%5C/g;s/%[0123456789ABCDEFabcdef]\{2\}/|&|/g' | $(TR) '|' '\n' | $(SED) '/^%[0123456789ABCDEFabcdef]\{2\}$$/!s/%/|%25|/' | $(TR) '|' '\n' | $(AWK) '$$0!~/%/{printf "%s",$$0}/%/{d="0123456789ABCDEF";v=substr(toupper($$0),2,2);printf "\\%04o",(index(d,substr(v,1,1))-1)*16+index(d,substr(v,2,1))-1}' | $(xargsquote) | $(XARGS) -E '' $(PRINTF) '%b'
-
-# (callable) Percent‐decode the given strings.
-#
-# ☡ This variable creates a subshell every time it is computed.
-override perdec = $(shell $(PRINTF) '%s\0450A' $(foreach encoded,$1,$(call quote,$(encoded))) | $(perdeccmd))
-
-# (callable) Percent‐encode the given strings.
-#
-# This singly‐encodes u·r·i characters and doubly‐encodes other characters, then calls `perdec´ to decode back to a single encoding.
-# The encoding assumes the input is a “u·r·i component”; e·g that the resulting string should only contain `pchar´ (but can contain any `sub-delim´).
-#
-# It is assumed that the given strings do not contain newlines.
-#
-# ☡ This variable creates a subshell every time it is computed.
-override perenc = $(shell $(PRINTF) '%s\n' $(foreach unencoded,$1,$(call quote,$(unencoded))) | $(OD) -t x1 | $(SED) 's/^[0123456789]*//;s/0[Aa]/%&/g;s/2[146789ABCDEabcde]/%&/g;s/3[0123456789AaBbDd]/%&/g;s/40/%&/g;s/[46][123456789ABCDEFabcdef]/%&/g;s/[57][0123456789Aa]/%&/g;s/5[Ff]/%&/g;s/7[Ee]/%&/g;s/[ ][0123456789ABCDEFabcdef]\{2\}/%25&/g' | $(TR) -d ' \n' | $(TR) 'abcdef' 'ABCDEF' | $(perdeccmd))
-
-# (callable) Percent‐encode each component in the given paths.
-#
-# ☡ This variable creates a subshell every time it is computed.
-override pathenc = $(subst %2F,/,$(call perenc,$1))
-
-# (callable) Create a unique name for the given file, based on its absolute path.
-#
-# ☡ This variable creates a subshell every time it is computed.
-namehash = $(shell $(PRINTF) '%s' $(call quote,$(abspath $1)) | $(CKSUM) | $(SED) 's/ .*//' | $(XARGS) -E '' $(PRINTF) '%X')-$(notdir $1)
-
 # (overridable) Collect all of the applicable includes from the includes directory.
 sourceincludes := $(if $(and $(INCLUDEDIR),$(wildcard $(INCLUDEDIR))),$(patsubst ./%,%,$(shell $(FIND) $(foreach dir,$(INCLUDEDIR),$(call quote,$(dir))) '(' $(FINDINCLUDERULES) ')' -a -type f -a -print)),)
 
@@ -401,15 +431,6 @@ override assetfiles := $(filter-out $(xmlfiles) $(plaintextfiles),$(sourcefiles)
 # (callable) Get the types of the given files.
 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)))
-
-# (callable) Get the source file for the given magic files.
-override magicsource = $(foreach magicpath,$1,$(patsubst %|$(magicpath),%,$(firstword $(filter %|$(magicpath),$(magicpair)))))
-
-# (callable) Get the build file for the given magic files.
-override magicfile = $(foreach file,$1,$(patsubst $(file)|%,%,$(filter $(file)|%,$(magicpair))))
-
 # (callable) Get the local path for the given source file.
 override sourcepath = $(or $(firstword $(foreach directory,$(SRCDIR),$(if $(filter .,$(directory)),$(wildcard $1),$(if $(filter $(directory)/%,$1),$(patsubst $(directory)/%,%,$1),)))),$(error Unable to get local path for source file `$1´))
 
@@ -454,10 +475,10 @@ 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))))
 
-# Pair each build directory, parser, transform, source file, or parsed file with its file u·r·i.
-override fileuripairs := $(join $(patsubst %,%|,$(BUILDDIR) $(PARSERS) $(TRANSFORMS) $(sourcefiles) $(sourceincludes) $(call parsed,$(sourcefiles) $(sourceincludes))),$(call pathenc,$(foreach uriable,$(BUILDDIR) $(PARSERS) $(TRANSFORMS) $(sourcefiles) $(sourceincludes) $(call parsed,$(sourcefiles) $(sourceincludes)),file://$(abspath $(uriable)))))
+# Pair each build directory, transform, source file, or parsed file with its file u·r·i.
+override fileuripairs := $(join $(patsubst %,%|,$(BUILDDIR) $(TRANSFORMS) $(sourcefiles) $(sourceincludes) $(call parsed,$(sourcefiles) $(sourceincludes))),$(call pathenc,$(foreach uriable,$(BUILDDIR) $(TRANSFORMS) $(sourcefiles) $(sourceincludes) $(call parsed,$(sourcefiles) $(sourceincludes)),file://$(abspath $(uriable)))))
 
-# (callable) Get the file u·r·is for the given parsers, transforms, source file or parsed files.
+# (callable) Get the file u·r·is for the given transforms, source file or parsed files.
 override fileuri = $(foreach file,$1,$(or $(patsubst $(file)|%,%,$(filter $(file)|%,$(fileuripairs))),$(error Unable to get file u·r·i for `$(file)´)))
 
 ifneq ($(wildcard $(BUILDDIR)/dependencies),)
@@ -526,9 +547,6 @@ override installed = $(foreach file,$1,$(DESTDIR)/$(call destination,$(file)))
 
 # ─ ¶ Recipe Variable Definitions ─────────────────────────────────────
 
-# (callable) Get the identifier for the given parser or transform.
-override id = $(XMLLINT) --noent --nonet --xpath '/*/*[local-name()="id" and namespace-uri()="urn:fdc:ladys.computer:20231231:Shu1She4"]/text()[1]' $(call quote,$1) 2>>/dev/null || $(PRINTF) '%s\n' $(call quote,about:shushe?$(or $2,unknown)=$(call pathenc,$(basename $(notdir $1))))
-
 # (callable) Sanitize and wrap the provided plaintext file in X·M·L, printing to `stdout´.
 override wrapplaintext = { $(PRINTF) '%s\n%s' '<?xml version="1.0"?>' '<script xmlns="http://www.w3.org/1999/xhtml" type="$(call typeoffile,$1)"><![CDATA['; $(TR) '\000\013\014' '\032\011\012' <$(call quote,$1) | $(SED) "$$($(PRINTF) '%b' 's/]]>/]]]]><!\\[CDATA\\[>/g\ns/\0357\0277\0276/�/g\ns/\0357\0277\0277/�/g\n$$!s/\\r$$//g\ns/\\r/\\n/g\n$$!s/\0302\0205$$//g\ns/\0302\0205/\\n/g\ns/\0342\0200\0250/\\n/g\ns/[\0001\0002\0003\0004\0005\0006\0007\0010]/�/g\ns/[\0016\0017\0020\0021\0022\0023\0024\0025\0026\0027\0031\0032\0033\0034\0035\0036\0037]/�/g')"; $(PRINTF) '%s\n' ']]></script>'; }
 
@@ -539,25 +557,11 @@ 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}')"
 
-# (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.
 all : $(call built,$(recursivefiles) $(installablefiles)) ;
 
-# Destroy buildfiles.
-clean :
-	$(if $(BUILDDIR),$(silent)$(RM) -f -R $(call quote,$(BUILDDIR)/),)
-
-# Destroy build directory and installed files.
-gone : clean uninstall ;
-
-# Provide help.
-help :
-	@$(PRINTF) '%b' '$(subst $(newline),\n,$(makefileinfo))'
-
 # Install the compiled files into `DESTDIR´, or error if any are recursive.
 install : $(call installed,$(recursivefiles) $(installablefiles)) ;
 
@@ -571,7 +575,7 @@ listout :
 
 # Destroy installed files.
 uninstall :
-	$(foreach file,$(installablefiles),$(if $(wildcard $(call installed,$(file))),$(silent)$(PRINTF) '%s\n' $(call quote,Removing </$(patsubst $(DESTDIR)/%,%,$(call installed,$(file)))>…)$(newline)$(silent)$(RM) -f $(call quote,$(call installed,$(file)))$(newline),))
+	$(foreach file,$(installablefiles),$(if $(wildcard $(call installed,$(file))),$(silent)$(PRINTF) '%s\n' $(call quote,Removing </$(patsubst $(DESTDIR)/%,%,$(call installed,$(file)))>…)$(newline)$(silent)$(RM) -f -R $(call quote,$(call installed,$(file)))$(newline),))
 
 # Raise an error when attempting to build any files with recursive dependencies.
 $(call built,$(recursivefiles)) :
@@ -589,74 +593,46 @@ FORCE : ;
 .SUFFIXES : ;
 
 # Don’t delete these files even if Make is stopped in the process of rebuilding them.
-.PRECIOUS : GNUmakefile ;
+.PRECIOUS : $(THISDIR)/GNUmakefile ;
 
 # Phony rules; always consider these out·of·date.
-.PHONY : FORCE all default clean gone info install list listout uninstall $(call built,$(recursivefiles)) ;
+.PHONY : FORCE all install list listout uninstall $(call built,$(recursivefiles)) ;
 
-ifeq ($(notbuilding),)
-# Reload this make·file if the magic file, parser, dependencies, or destinations have changed.
+# Reload this make·file if the transform has changed.
 #
-# If the magic file or parser changed, then another restart will be required, as the dependencies and destinations will need to be regenerated.
-$(THISDIR)/GNUmakefile : $(BUILDDIR)/magic.mgc $(BUILDDIR)/parser.xslt $(BUILDDIR)/dependencies $(BUILDDIR)/destinations
+# This also captures any changes to dependencies or destinations.
+$(THISDIR)/GNUmakefile : $(BUILDDIR)/transform.xslt
 	$(silent)$(TOUCH) $(THISDIR)/GNUmakefile
-	$(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))
-endif
+	$(if $(typeupdates),$(silent)$(RM) $(call quote,$(BUILDDIR)/.update-types),)
+	$(call inform,$(PRINTF) '%b\n' '\0033[1mDependency graph$(comma) output destinations$(comma) and transforms were updated. Restarting…\0033[22m' >&2)
 
 # ─ ¶ Build Targets ───────────────────────────────────────────────────
 
-# Create symbolic links from the build directory’s store of magic files to their corresponding sources.
-$(call magicfile,$(MAGIC)) : $(BUILDDIR)/magic/% : $$(call magicsource,$$@)
-	$(silent)$(call ensuredirectory,$(dir $@))
-	$(silent)$(LN) -sf $(call quote,$(realpath $<)) $(call quote,$@)
-
-# Generate the compiled magic file from its sources.
-#
-# It must be updated if any of the files in the magic directory change.
-$(BUILDDIR)/magic.mgc : $(call diffprereqs,magic,$(sort $(call magicfile,$(MAGIC))))
-	$(foreach outdated,$(filter-out $^,$(wildcard $(BUILDDIR)/magic/*)),$(silent)$(RM) $(call quote,$(outdated))$(newline))
-	$(call inform,$(PRINTF) '%s\n' 'Compiling new magic…' >&2)
-	$(silent)$(call ensuredirectory,$(dir $@))
-	$(silent)$(CD) $(call quote,$(BUILDDIR)) && $(FILE) -C -m $(call quote,$(realpath $(BUILDDIR)/magic))
-	$(silent)$(TOUCH) $(call quote,$(BUILDDIR)/.update-types)
-
-# Generate the main parser.
-$(BUILDDIR)/parser.catalog : $(call diffprereqs,parsers,$(sort $(PARSERS)))
-	$(call inform,$(PRINTF) '%s\n' 'Generating catalog of parsers…' >&2)
-	$(silent)$(XMLCATALOG) --create --noout $(call quote,$@)
-	$(foreach parser,$(PARSERS),$(silent){ $(call id,$(parser)); $(PRINTF) '%s\n' $(call quote,$(call fileuri,$(parser))) '--noout' $(call quote,$@); } | $(xargsmultiquote) | $(XARGS) -E '' $(XMLCATALOG) --add uri$(newline))
-$(BUILDDIR)/parser.xslt : $(BUILDDIR)/parser.catalog $(THISDIR)/lib/catalog2parser.xslt
-	$(call inform,$(PRINTF) '%s\n' 'Generating main parser…' >&2)
-	$(silent)$(XSLTPROC) --nonet --novalid --nomkdir --nowrite $(call quote,$(THISDIR)/lib/catalog2parser.xslt) $(call quote,$<) >|$(call quote,$@)
-	$(silent)$(TOUCH) $(call quote,$(BUILDDIR)/.update-types)
-
 # Generate R·D·F metadata for files.
-#
-# 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)/.metadata-format-changed-since $(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" nfo:fileUrl="%s"><nie:interpretedAs>$(if $(filter $<,$(assetfiles)),<nfo:InformationElement nie:mimeType="%s"/>,<nfo:PlainTextDocument nie:mimeType="%s"/>)</nie:interpretedAs><书社vocab:hasParsedFile nfo:fileUrl="%s"/><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,$(call fileuri,$<))) $(call quote,$(call attresc,$(call typeoffile,$<))) $(call quote,$(call attresc,$(call fileuri,$(call parsed,$<)))) >|$(call quote,$@))
+	$(call inform,$(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 '' $(PRINTF) '<?xml version="1.0"?><书社vocab:$(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" nfo:fileUrl="%s"><nie:interpretedAs>$(if $(filter $<,$(assetfiles)),<nfo:InformationElement nie:mimeType="%s"/>,<nfo:PlainTextDocument nie:mimeType="%s"/>)</nie:interpretedAs><书社vocab:hasParsedFile nfo:fileUrl="%s"/><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,$(call fileuri,$<))) $(call quote,$(call attresc,$(call typeoffile,$<))) $(call quote,$(call attresc,$(call fileuri,$(call parsed,$<)))) >|$(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.
-#
-# 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 $(PARSERLIBS) $(typeupdates)
-	$(call inform,$(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 $$($(DATE) -u '+%Y-%m-%dT%H:%M:%SZ') --stringparam IDENTIFIER $(call quote,$(call localuri,$<))$(if $(THISREV), --stringparam THISREV $(call quote,$(THISREV)),)$(if $(SRCREV), --stringparam SRCREV $(call quote,$(SRCREV)),) $(call quote,$(BUILDDIR)/parser.xslt) - >|$(call quote,$@)))
+	$(call inform,$(PRINTF) '%s\n' $(call quote,Processing `$<´…) >&2)
+	$(silent)$(call ensuredirectory,$(dir $@))
+	$(silent)$(if $(filter $<,$(assetfiles)),$(PRINTF) '%s\n' $(call quote,<?xml version="1.0"?><object xmlns="http://www.w3.org/1999/xhtml" type="$(call typeoffile,$<)" data="$(call datauri,$<)"/>) >|$(call quote,$@),$(if $(filter $<,$(plaintextfiles)),$(call wrapplaintext,$<),$(call serializexml,$<)) | $(XSLTPROC) --nonet --novalid --nomkdir --nowrite --stringparam BUILDTIME $$($(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) - >|$(call quote,$@))
 
 # 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).
-#
-# 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))
+	$(call inform,$(PRINTF) '%s\n' 'Compiling metadata…' >&2)
+	$(silent){ $(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.
+#
+# Because this depends on the metadata, it will also update the dependencies and destinations.
 $(BUILDDIR)/transform.catalog : $(call diffprereqs,transforms,$(sort $(TRANSFORMS)))
 	$(call inform,$(PRINTF) '%s\n' 'Generating catalog of transforms…' >&2)
 	$(silent)$(XMLCATALOG) --create --noout $(call quote,$@)
@@ -666,7 +642,14 @@ $(BUILDDIR)/transform.xslt : $(BUILDDIR)/transform.catalog $(BUILDDIR)/metadata
 	$(silent)$(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,$$@))) $(BUILDDIR)/transform.xslt $(TRANSFORMLIBS) $(BUILDDIR)/metadata
+#
+# Altho this (obviously) depends on the main transform, it is not listed as a prerequisite (rather, the main transform is listed as a prerequisite for the make·file writ large). This is because the transform will update after every metadata change (i·e, basically constantly), but compiled files should only actually be updated in two cases :⁠—
+#
+# • When one of the actual transforms are updated (tracked by `transform.catalog´), and
+# • When the metadata of ⹐source files they depend on⹑ change.
+#
+# This is to reduce the number of needless regenerations of files with no substantial change.
+$(call compiled,$(compilablefiles)) : $(BUILDDIR)/results/% : $$(call parsed,$$(call uncompiled,$$@)) $$(call parsed,$$(call dependencies,$$(call uncompiled,$$@))) $(BUILDDIR)/transform.catalog $(TRANSFORMLIBS) $$(call metadata,$$(call dependencies,$$(call uncompiled,$$@)))
 	$(call inform,$(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,$(call uncompiled,$@)))$(if $(THISREV), --stringparam THISREV $(call quote,$(THISREV)),)$(if $(SRCREV), --stringparam SRCREV $(call quote,$(SRCREV)),) $(call quote,$(BUILDDIR)/transform.xslt) $(call quote,$<) >|$(call quote,$@)
@@ -707,6 +690,12 @@ endif
 
 # ─ ¶ Special Targets ─────────────────────────────────────────────────
 
+# Don’t use any implicit rules.
+.SUFFIXES : ;
+
+# Don’t delete these files even if Make is stopped in the process of rebuilding them.
+.PRECIOUS : $(THISDIR)/GNUmakefile ;
+
 # Reload this make·file if the archive components have changed.
 $(THISDIR)/GNUmakefile : $(BUILDDIR)/index
 	$(silent)$(TOUCH) $(THISDIR)/GNUmakefile
@@ -722,10 +711,13 @@ $(BUILDDIR)/extractor.xslt : $(SRC) $(THISDIR)/lib/archive2extractor.xslt
 # Use the extractor transform to extract the archive source file out into its components.
 #
 # This target sleeps for 1 second to ensure the resulting index will always be newer than this make·file.
+#
+# If the archive is empty, the index will not be written by `xsltproc´ and will need to be manually created.
 $(BUILDDIR)/index : $(BUILDDIR)/extractor.xslt $(SRC)
 	$(call inform,$(PRINTF) '%s\n' $(call quote,Extracting components for </$(NAME)>…) >&2)
 	$(silent)$(SLEEP) 1
 	$(silent)$(XSLTPROC) --nonet --novalid -o $(call quote,$@) --writesubtree $(call quote,$(dir $@)) $(call quote,$<) $(call quote,$(SRC))
+	$(silent)if $(TEST) ! -e $(call quote,$@); then $(TOUCH) $(call quote,$@); fi
 
 # All archive components are extracted alongside the index.
 $(foreach file,$(archivefiles),$(BUILDDIR)/extracted/$(file)) : $(BUILDDIR)/index ;
@@ -744,7 +736,155 @@ $(DESTDIR)/% : $(SRC) $(foreach file,$(archivefiles),$(BUILDDIR)/files/$(file))
 	$(call inform,$(PRINTF) '%s\n' $(call quote,Archiving </$(NAME)>…) >&2)
 	$(silent)$(call ensuredirectory,$(dir $@))
 	$(silent)$(RM) -f -R $(call quote,$@)
-	$(silent)$(CD) $(call quote,$(BUILDDIR)/files); if $(call xpath,/*/@*[local-name()="expanded" and namespace-uri()="urn:fdc:ladys.computer:20231231:Shu1She4"],$(abspath $<)); then $(MKDIR) -p $(call quote,$(abspath $@)); $(PRINTF) '%s\n' $(foreach file,$(archivefiles),$(call quote,$(file))) | $(PAX) -r -w $(call quote,$(abspath $@)); else $(PRINTF) '%s\n' $(foreach file,$(archivefiles),$(call quote,$(file))) | $(PAX) -w -x ustar >|$(call quote,$(abspath $@)); fi
+	$(silent)$(call ensuredirectory,$(BUILDDIR)/files)
+	$(silent)$(CD) $(call quote,$(BUILDDIR)/files); if $(call xpath,/*/@*[local-name()="expanded" and namespace-uri()="urn:fdc:ladys.computer:20231231:Shu1She4"],$(abspath $<)); then $(MKDIR) -p $(call quote,$(abspath $@)); $(PRINTF) '$(if $(archivefiles),%s\n,)' $(foreach file,$(archivefiles),$(call quote,$(file))) | $(PAX) -r -w $(call quote,$(abspath $@)); else $(PRINTF) '$(if $(archivefiles),%s\n,)' $(foreach file,$(archivefiles),$(call quote,$(file))) | $(PAX) -w -x ustar >|$(call quote,$(abspath $@)); fi
+
+# ━ § BEGIN INITIAL MAKE·FILE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+else ifeq ($(MODE),urn:fdc:ladys.computer:20231231:Shu1She4:mode:initial)
+
+# ─ ¶ Non‐Recipe Variable Definitions ─────────────────────────────────
+
+# Non·empty if this is a two‐step build.
+override twostep := $(if $(DATADIR),$(shell if $(TEST) -d $(call quote,$(DATADIR)); then $(PRINTF) '%s\n' '1'; fi),)
+
+# Pair each source magic file with its location in the build directory.
+override magicpair := $(foreach magicfile,$(MAGIC),$(magicfile)|$(BUILDDIR)/magic/$(call namehash,$(magicfile)))
+
+# (callable) Get the source file for the given magic files.
+override magicsource = $(foreach magicpath,$1,$(patsubst %|$(magicpath),%,$(firstword $(filter %|$(magicpath),$(magicpair)))))
+
+# (callable) Get the build file for the given magic files.
+override magicfile = $(foreach file,$1,$(patsubst $(file)|%,%,$(filter $(file)|%,$(magicpair))))
+
+# Pair each parser with its file u·r·i.
+override fileuripairs := $(join $(patsubst %,%|,$(PARSERS)),$(call pathenc,$(foreach uriable,$(PARSERS),file://$(abspath $(uriable)))))
+
+# (callable) Get the file u·r·is for the given parsers.
+override fileuri = $(foreach file,$1,$(or $(patsubst $(file)|%,%,$(filter $(file)|%,$(fileuripairs))),$(error Unable to get file u·r·i for `$(file)´)))
+
+ifeq ($(twostep),)
+# (overridable) Options to use when calling ⛩📰 书社.
+shusheopts := MODE='urn:fdc:ladys.computer:20231231:Shu1She4:mode:default'
+else
+# (overridable) Options to use when calling ⛩📰 书社 the first time.
+shushedataopts := INCLUDEDIR=$(call quote,$(DATADIR)) BUILDDIR=$(call quote,$(BUILDDIR)/data) FINDRULES=$(subst $$,$$$$,$(call quote,$(FINDRULES) -a '(' $(FINDDATARULES) ')')) FINDINCLUDERULES=$(subst $$,$$$$,$(call quote,$(FINDINCLUDERULES))) MODE='urn:fdc:ladys.computer:20231231:Shu1She4:mode:default'
+
+# (overridable) Options to use when calling ⛩📰 书社 the second time.
+shushesiteopts := INCLUDEDIR=$(call quote,$(INCLUDEDIR) $(BUILDDIR)/data/public) BUILDDIR=$(call quote,$(BUILDDIR)/site) FINDRULES=$(subst $$,$$$$,$(call quote,$(FINDRULES) -a '!' '(' $(FINDDATARULES) ')')) FINDINCLUDERULES=$(subst $$,$$$$,$(call quote,$(FINDINCLUDERULES))) MODE='urn:fdc:ladys.computer:20231231:Shu1She4:mode:default'
+endif
+
+# ─ ¶ Recipe Variable Definitions ─────────────────────────────────────
+
+# ─ ¶ Phony Targets ───────────────────────────────────────────────────
+
+ifeq ($(twostep),)
+all install list listout uninstall : $(BUILDDIR)/magic.mgc $(BUILDDIR)/parser.xslt
+	@$(MAKE) -f $(call quote,$(makefile)) $@ $(shusheopts)
+else
+all : $(BUILDDIR)/site/magic.mgc $(BUILDDIR)/site/parser.xslt data
+	@$(MAKE) -f $(call quote,$(makefile)) $@ $(shushesiteopts)
+install uninstall : all
+	@$(MAKE) -f $(call quote,$(makefile)) $@ $(shushedataopts)
+	@$(MAKE) -f $(call quote,$(makefile)) $@ $(shushesiteopts)
+list : $(BUILDDIR)/site/magic.mgc $(BUILDDIR)/site/parser.xslt data
+	@$(PRINTF) '%b' $(call quote,\0033[1;7m||Stage|1:||\0033[22;27m\0033[4m||||||||||||||||||||\0033[24m ) | $(TR) ' |' '\n '
+	@$(MAKE) -f $(call quote,$(makefile)) $@ $(shushedataopts)
+	@$(PRINTF) '%b' $(call quote, \0033[1;7m||Stage|2:||\0033[22;27m\0033[4m||||||||||||||||||||\0033[24m ) | $(TR) ' |' '\n '
+	@$(MAKE) -f $(call quote,$(makefile)) $@ $(shushesiteopts)
+listout : $(BUILDDIR)/site/magic.mgc $(BUILDDIR)/site/parser.xslt data
+	@{ $(MAKE) -f $(call quote,$(makefile)) $@ $(shushedataopts); $(MAKE) -f $(call quote,$(makefile)) $@ $(shushesiteopts); } | $(SED) '$$!s/$$/ /' | $(TR) -d '\n'
+list1 listout1 : %1 : $(BUILDDIR)/data/magic.mgc $(BUILDDIR)/data/parser.xslt
+	@$(MAKE) -f $(call quote,$(makefile)) $* $(shushedataopts)
+list2 listout2 : %2 : $(BUILDDIR)/site/magic.mgc $(BUILDDIR)/site/parser.xslt data
+	@$(MAKE) -f $(call quote,$(makefile)) $* $(shushesiteopts)
+endif
+
+# Destroy buildfiles.
+clean :
+	$(if $(BUILDDIR),$(silent)$(RM) -f -R $(call quote,$(BUILDDIR)/),)
+
+ifneq ($(twostep),)
+# Build the data and remove outdated data files.
+data : $(BUILDDIR)/data.out
+	$(silent)$(FIND) $(call quote,$(BUILDDIR)/data/public) '!' -exec $(GREP) -F -q -x '{}' $(call quote,$<) ';' -a '(' -type d -o -print ')' | $(xargsmultiquote) | $(XARGS) -E '' $(RM)
+endif
+
+# Provide help.
+help :
+	@$(PRINTF) '%b' '$(subst $(newline),\n,$(makefileinfo))'
+
+# Destroy build directory and installed files.
+gone : uninstall clean ;
+
+# Add as a prerequisite to treat the target as tho it were phony.
+FORCE : ;
+
+# ─ ¶ Special Targets ─────────────────────────────────────────────────
+
+# Perform secondary expansion; this enables pattern rules to determine their prerequisites based on the matched pattern.
+.SECONDEXPANSION : ;
+
+# Don’t use any implicit rules.
+.SUFFIXES : ;
+
+# Phony rules; always consider these out·of·date.
+.PHONY : FORCE all clean gone install list listout uninstall$(if $(DATADIR), data list1 listout1 list2 listout2,) ;
+
+# ─ ¶ Build Targets ───────────────────────────────────────────────────
+
+# Create symbolic links from the build directory’s store of magic files to their corresponding sources.
+$(call magicfile,$(MAGIC)) : $(BUILDDIR)/magic/% : $$(call magicsource,$$@)
+	$(silent)$(call ensuredirectory,$(dir $@))
+	$(silent)$(LN) -sf $(call quote,$(realpath $<)) $(call quote,$@)
+
+# Generate the compiled magic file from its sources.
+#
+# It must be updated if any of the files in the magic directory change.
+$(BUILDDIR)/magic.mgc : $(call diffprereqs,magic,$(sort $(call magicfile,$(MAGIC))))
+	$(foreach outdated,$(filter-out $^,$(wildcard $(BUILDDIR)/magic/*)),$(silent)$(RM) $(call quote,$(outdated))$(newline))
+	$(call inform,$(PRINTF) '%s\n' 'Compiling new magic…' >&2)
+	$(silent)$(call ensuredirectory,$(dir $@))
+	$(silent)$(CD) $(call quote,$(BUILDDIR)) && $(FILE) -C -m $(call quote,$(realpath $(BUILDDIR)/magic))
+	$(silent)$(TOUCH) $(call quote,$(BUILDDIR)/.update-types)
+
+# Generate the main parser.
+$(BUILDDIR)/parser.catalog : $(call diffprereqs,parsers,$(sort $(PARSERS)))
+	$(call inform,$(PRINTF) '%s\n' 'Generating catalog of parsers…' >&2)
+	$(silent)$(XMLCATALOG) --create --noout $(call quote,$@)
+	$(foreach parser,$(PARSERS),$(silent){ $(call id,$(parser)); $(PRINTF) '%s\n' $(call quote,$(call fileuri,$(parser))) '--noout' $(call quote,$@); } | $(xargsmultiquote) | $(XARGS) -E '' $(XMLCATALOG) --add uri$(newline))
+$(BUILDDIR)/parser.xslt : $(BUILDDIR)/parser.catalog $(THISDIR)/lib/catalog2parser.xslt
+	$(call inform,$(PRINTF) '%s\n' 'Generating main parser…' >&2)
+	$(silent)$(XSLTPROC) --nonet --novalid --nomkdir --nowrite $(call quote,$(THISDIR)/lib/catalog2parser.xslt) $(call quote,$<) >|$(call quote,$@)
+	$(silent)$(TOUCH) $(call quote,$(BUILDDIR)/.update-types)
+
+ifneq ($(twostep),)
+$(BUILDDIR)/data/magic.mgc $(BUILDDIR)/data/parser.xslt : $(BUILDDIR)/data/% : $(BUILDDIR)/$$*
+	$(silent)$(call ensuredirectory,$(dir $@))
+	$(silent)$(LN) -sf $(call quote,$(realpath $<)) $(call quote,$@)
+$(BUILDDIR)/site/magic.mgc $(BUILDDIR)/site/parser.xslt : $(BUILDDIR)/site/% : $(BUILDDIR)/$$*
+	$(silent)$(call ensuredirectory,$(dir $@))
+	$(silent)$(LN) -sf $(call quote,$(realpath $<)) $(call quote,$@)
+$(BUILDDIR)/data.out : $(BUILDDIR)/data/magic.mgc $(BUILDDIR)/data/parser.xslt FORCE
+	@$(MAKE) -f $(call quote,$(makefile)) $(shushedataopts)
+	@$(MAKE) -s -f $(call quote,$(makefile)) listout QUIET=1 $(shushedataopts) | $(TR) ' ' '\n' | $(xargsmultiquote) | $(XARGS) -E '' $(PRINTF) $(call quote,$(BUILDDIR)/data/public/%s\n) >$(call quote,$(BUILDDIR)/data.out)
+endif
+
+ifeq ($(twostep),)
+$(BUILDDIR)/lastprereqs/% : ;
+$(BUILDDIR)/% : $(BUILDDIR)/magic.mgc $(BUILDDIR)/parser.xslt FORCE
+	@$(MAKE) -f $(call quote,$(makefile)) $(call quote,$@) $(shusheopts)
+$(DESTDIR)/% : $(BUILDDIR)/magic.mgc $(BUILDDIR)/parser.xslt FORCE
+	@$(MAKE) -f $(call quote,$(makefile)) $(call quote,$@) $(shusheopts)
+else
+$(BUILDDIR)/data/% : $(BUILDDIR)/data/magic.mgc $(BUILDDIR)/data/parser.xslt FORCE
+	@$(MAKE) -f $(call quote,$(makefile)) $(call quote,$@) $(shushedataopts)
+$(BUILDDIR)/site/% : $(BUILDDIR)/site/magic.mgc $(BUILDDIR)/site/parser.xslt data
+	$(silent)$(call ensuredirectory,$(dir $@))
+	@$(MAKE) -f $(call quote,$(makefile)) $(call quote,$@) $(shushesiteopts)
+$(DESTDIR)/% : $(BUILDDIR)/site/magic.mgc $(BUILDDIR)/site/parser.xslt data
+	@$(MAKE) -f $(call quote,$(makefile)) $(call quote,$@) $(if $(shell $(GREP) -F -x $(call quote,$(BUILDDIR)/data/$*) $(BUILDDIR)/data.out),$(shushedataopts),$(shushesiteopts))
+endif
 
 # ━ § END DEFINED MAKE·FILE MODES ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━