Improve dependency tracking

- Add a `.metadata-format-changed-since` file which is a dependency for
  metadata generation. The hope is that this file will change when·ever
  the metadata format does, forcing a rebuild of stale metadata.

- Add `PARSERLIBS` and `TRANSFORMLIBS` (and `EXTRA⸺` variants) to
  enable rebuilds on changes to files that parsers or transforms depend
  on.

diff --git a/.metadata-format-changed-since b/.metadata-format-changed-since
new file mode 100644 (file)
index 0000000..6cf4047
--- /dev/null
+++ b/.metadata-format-changed-since
@@ -0,0 +1,11 @@
+SPDX-FileCopyrightText: 2024 Lady <https://www.ladys.computer/about/#lady>
+SPDX-License-Identifier: CC0-1.0
+
+The following hash indicates a commit in which the metadata format
+generated by ⛩📰 书社 was different than it currently is :⁠—
+
+c84c2b38caf34807fd1c52a8f19fcf0af7e9807e
+
+The purpose of this file is to serve as a trackable dependency which
+will prompt a rebuild of metadata when the generation mechanism
+changes.

diff --git a/GNUmakefile b/GNUmakefile
index a16e8bf9041ae933e3883f8612ca793fe57b863f..c7f615dfb938f2b6bb4edabdbabf8441108af09a 100644 (file)
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -184,12 +184,24 @@ FINDINCLUDERULES := $(FINDRULES)$(if $(EXTRAFINDINCLUDERULES), -a '(' $(EXTRAFIN
 EXTRAMAGIC :=
 MAGIC := $(sort $(patsubst ./%,%,$(wildcard $(THISDIR)/magic/*)) $(EXTRAMAGIC))
 
+# The list of depedencies for parsers.
+#
+# When these files change, the assumption is that the result of the parsers will change as well, even if the parsers themselves have not.
+EXTRAPARSERLIBS :=
+PARSERLIBS := $(sort $(THISDIR)/lib/split.xslt $(EXTRAPARSERLIBS))
+
 # The list of parsers for plaintext file types.
 #
 # Which parsers are provided will influence which kinds of files are recognized as plaintext.
 EXTRAPARSERS :=
 PARSERS := $(sort $(patsubst ./%,%,$(wildcard $(THISDIR)/parsers/*.xslt)) $(EXTRAPARSERS))
 
+# The list of depedencies for transforms.
+#
+# When these files change, the assumption is that the result of the transforms will change as well, even if the transforms themselves have not.
+EXTRATRANSFORMLIBS :=
+TRANSFORMLIBS := $(sort $(THISDIR)/lib/serialize.xslt $(EXTRATRANSFORMLIBS))
+
 # The list of transforms.
 EXTRATRANSFORMS :=
 TRANSFORMS := $(sort $(patsubst ./%,%,$(wildcard $(THISDIR)/transforms/*.xslt)) $(EXTRATRANSFORMS))
@@ -620,10 +632,8 @@ $(BUILDDIR)/parser.xslt : $(BUILDDIR)/parser.catalog $(THISDIR)/lib/catalog2pars
 
 # Generate R·D·F metadata for files.
 #
-# 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 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,$@))
 
@@ -633,7 +643,7 @@ $(call metadata,$(sourcefiles) $(sourceincludes)) : % : $$(call datadata,$$@) $(
 # Asset files are turned into H·T·M·L embeds pointing to `data:´ U·R·I’s.
 #
 # If the types have been updated but `typeupdates´ is not active, this recipe is skipped because a restart is forthcoming.
-$(call parsed,$(sourcefiles) $(sourceincludes)) : % : $$(call unparsed,$$@) $(BUILDDIR)/parser.xslt $(typeupdates)
+$(call parsed,$(sourcefiles) $(sourceincludes)) : % : $$(call unparsed,$$@) $(BUILDDIR)/parser.xslt $(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) - >|$(call quote,$@)))
 
@@ -651,12 +661,12 @@ $(BUILDDIR)/transform.catalog : $(call diffprereqs,transforms,$(sort $(TRANSFORM
        $(call inform,$(PRINTF) '%s\n' 'Generating catalog of transforms…' >&2)
        $(silent)$(XMLCATALOG) --create --noout $(call quote,$@)
        $(foreach transform,$(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 $(THISDIR)/lib/catalog2transform.xslt
+$(BUILDDIR)/transform.xslt : $(BUILDDIR)/transform.catalog $(BUILDDIR)/metadata $(THISDIR)/lib/literally.xslt $(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) $(call quote,$<) >|$(call quote,$@)
 
 # Compile the result files using the dependencies as necessary.
-$(call compiled,$(compilablefiles)) : $(BUILDDIR)/results/% : $$(call parsed,$$(call uncompiled,$$@)) $$(call parsed,$$(call dependencies,$$(call uncompiled,$$@))) $(BUILDDIR)/transform.xslt $(BUILDDIR)/metadata
+$(call compiled,$(compilablefiles)) : $(BUILDDIR)/results/% : $$(call parsed,$$(call uncompiled,$$@)) $$(call parsed,$$(call dependencies,$$(call uncompiled,$$@))) $(BUILDDIR)/transform.xslt $(TRANSFORMLIBS) $(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,$(call uncompiled,$@)))$(if $(THISREV), --stringparam THISREV $(call quote,$(THISREV)),)$(if $(SRCREV), --stringparam SRCREV $(call quote,$(SRCREV)),) $(call quote,$(BUILDDIR)/transform.xslt) $(call quote,$<) >|$(call quote,$@)

diff --git a/README.markdown b/README.markdown
index 31a73336f7291c926acbd8345e513504267de084..8ae0a04f5bad55f6d2ca8d604ca5ac1594d6c6bd 100644 (file)
--- a/README.markdown
+++ b/README.markdown
@@ -307,6 +307,15 @@ The following additional variables can be used to control the behaviour
   The value of this variable is appended to `PARSERS` by default, to
     enable additional parsers without overriding the existing ones.
 
+- **`PARSERLIBS`:**
+  A white·space‐separated list of parser dependencies (default:
+    `$(THISDIR)/lib/split.xslt`).
+
+- **`EXTRAPARSERLIBS`:**
+  The value of this variable is appended to `PARSERLIBS` by default, to
+    enable additional parser dependencies without overriding the
+    existing ones.
+
 - **`TRANSFORMS`:**
   A white·space‐separated list of transforms to use (default:
     `$(THISDIR)/transforms/*.xslt`).
@@ -315,6 +324,15 @@ The following additional variables can be used to control the behaviour
   The value of this variable is appended to `TRANSFORMS` by default, to
     enable additional transforms without overriding the existing ones.
 
+- **`TRANSFORMLIBS`:**
+  A white·space‐separated list of transform dependencies (default:
+    `$(THISDIR)/lib/serialize.xslt`).
+
+- **`EXTRATRANSFORMLIBS`:**
+  The value of this variable is appended to `TRANSFORMLIBS` by default,
+    to enable additional transform dependencies without overriding the
+    existing ones.
+
 - **`XMLTYPES`:**
   A white·space‐separated list of media types or media type suffixes to
     consider X·M·L (default: `application/xml text/xml +xml`).