Lady’s Gitweb - Shushe/blob - GNUmakefile

   1 SHELL = /bin/sh
   2
   3 # ━ § BASIC INFORMATION ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   4 override define makefileinfo
   5  ╭────────────────────────────╮
   6 ╔╡ ⁌ ⛩️📰 书社 ∷ GNUmakefile ╞════════════════════════════════╗
   7 ║╰────────────────────────────╯                                ║
   8 ╟┬ ¶ Prerequisites ───────────────────────────────────────────┬╢
   9 ║│                                                            │║
  10 ║│ Requires G·N·U Make, at least version 3.81, a version of   │║
  11 ║│ uuencode with base64 support, and the various programs     │║
  12 ║│ offered by libxml2 and libxslt. Beyond this, only programs │║
  13 ║│ required by Posix are required, altho there is a chance of │║
  14 ║│ version incompatibilities. The full list of program        │║
  15 ║│ requirements is as follows :—                             │║
  16 ║│                                                            │║
  17 ║│ • awk                                                      │║
  18 ║│ • cat                                                      │║
  19 ║│ • cp                                                       │║
  20 ║│ • date                                                     │║
  21 ║│ • echo                                                     │║
  22 ║│ • file                                                     │║
  23 ║│ • find                                                     │║
  24 ║│ • git (optional)                                           │║
  25 ║│ • mkdir (requires support for `-p´)                        │║
  26 ║│ • mv                                                       │║
  27 ║│ • od (requires support for `-t x1´)                        │║
  28 ║│ • printf                                                   │║
  29 ║│ • rm                                                       │║
  30 ║│ • sed                                                      │║
  31 ║│ • sleep                                                    │║
  32 ║│ • stat                                                     │║
  33 ║│ • test                                                     │║
  34 ║│ • touch                                                    │║
  35 ║│ • tr (requires support for `-d´)                           │║
  36 ║│ • uuencode (requires support for `-m´ and `-r´)            │║
  37 ║│ • xargs (requires support for `-0´)                        │║
  38 ║│ • xmlcatalog (provided by libxml2)                         │║
  39 ║│ • xmllint (provided by libxml2)                            │║
  40 ║│ • xsltproc (provided by libxslt)                           │║
  41 ║│                                                            │║
  42 ║│ In all cases, you can supply your own version of any       │║
  43 ║│ program `program´ by overriding the corresponding variable │║
  44 ║│ `PROGRAM´ when calling Make.                               │║
  45 ║╰────────────────────────────────────────────────────────────╯║
  46 ╟┬ ¶ Usage ───────────────────────────────────────────────────┬╢
  47 ║│                                                            │║
  48 ║│ • `make all´: Compile, but do not install, all files.      │║
  49 ║│                                                            │║
  50 ║│ • `make clean´: Remove `BUILDDIR´.                         │║
  51 ║│                                                            │║
  52 ║│ • `make gone´: Remove installed files.                     │║
  53 ║│                                                            │║
  54 ║│ • `make help´ (default): Print this message.               │║
  55 ║│                                                            │║
  56 ║│ • `make install´: Compile all files and install in         │║
  57 ║│   `DESTDIR´.                                               │║
  58 ║│                                                            │║
  59 ║│ • `make list´: List all recognized source files and their  │║
  60 ║│   classification (including media type and dependencies).  │║
  61 ║│                                                            │║
  62 ║│ Set `VERBOSE=1´ to see the text of commands as they are    │║
  63 ║│ executed.                                                  │║
  64 ║│                                                            │║
  65 ║│ See `README.markdown´ for a more involved description of   │║
  66 ║│ the capabilities and configuration of this program.        │║
  67 ║╰────────────────────────────────────────────────────────────╯║
  68 ╟┬ ¶ Copyright & License ─────────────────────────────────────┬╢
  69 ║│                                                            │║
  70 ║│ Copyright © 2023–2024 Lady [@ Lady’s Computer].            │║
  71 ║│                                                            │║
  72 ║│ This Source Code Form is subject to the terms of the       │║
  73 ║│ Mozilla Public License, v 2.0. If a copy of the M·P·L was  │║
  74 ║│ not distributed with this file, You can obtain one at      │║
  75 ║│ <http://mozilla.org/MPL/2.0/>.                             │║
  76 ║╰────────────────────────────────────────────────────────────╯║
  77 ╚══════════════════════════════════════════════════════════════╝
  78 endef
  79
  80 # ━ § MAKE·FILE SETUP ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  81
  82 # Programs needed to run this make·file.
  83 #
  84 # If these are not installed on your computer, or you need to use a
  85 # different implementation, you can override the appropriate variable.
  86 AWK := awk
  87 CAT := cat
  88 CP := cp
  89 DATE := date
  90 ECHO := echo
  91 FILE := file
  92 FIND := find
  93 GIT := git
  94 MKDIR := mkdir
  95 MV := mv
  96 OD := od
  97 PRINTF := printf
  98 RM := rm
  99 SED := sed
 100 SLEEP := sleep
 101 STAT := stat
 102 TEST := test
 103 TOUCH := touch
 104 TR := tr
 105 UUENCODE := uuencode
 106 XARGS := xargs
 107 XMLCATALOG := xmlcatalog
 108 XMLLINT := xmllint
 109 XSLTPROC := xsltproc
 110
 111 # The directory which contains the source files.
 112 #
 113 # Multiple directories can be given so long as files with the same name
 114 # do not exist in each.
 115 SRCDIR := sources
 116
 117 # The directory which contains “includes”: Files which may be included
 118 # in other files but for which no final output will be generated.
 119 #
 120 # Multiple directories can be given so long as files with the same name
 121 # do not exist in each.
 122 #
 123 # These can be inside of `SRCDIR´ directories if desired.
 124 INCLUDEDIR := sources/includes
 125
 126 # The directory in which to generate temporary buildfiles.
 127 BUILDDIR := build
 128
 129 # The directory into which to output files on `make install´.
 130 DESTDIR := public
 131
 132 # The location of this Makefile (and related ⛩️📰 书社 files),
 133 # relative to the current working directory.
 134 #
 135 # By default, this is inferred from the variable `MAKEFILE_LIST´.
 136 THISDIR := $(patsubst %/,%,$(dir $(lastword $(MAKEFILE_LIST))))
 137
 138 # The location of the magic files to use when determining media types.
 139 #
 140 # One is provided as part of this repository, but you can override it
 141 # if you need different media type detection.
 142 #
 143 # Your computer probably has a more comprehensive one installed at
 144 # `/usr/share/file/magic´, but it is not recommended that you use this
 145 # directly. Instead, link or copy just the files you expect to need for
 146 # your project.
 147 MAGICDIR := $(patsubst ./%,%,$(THISDIR)/magic)
 148
 149 # Configuration of `find´.
 150 #
 151 # By default, `find´ will ignore hidden files, those which begin with a
 152 # period, and those which are likely to cause problems for `make´.
 153 FINDRULES := -flags -nohidden -and ! '(' '(' -name '[.-]*' -or -name '*[][*?:|$$%\#;]*' ')' -and -prune ')'
 154 FINDINCLUDERULES := $(FINDRULES)
 155
 156 # The list of parsers for plaintext file types.
 157 #
 158 # Which parsers are provided will influence which kinds of files are
 159 # recognized as plaintext.
 160 #
 161 # Each parser ⁜must⁜ have a template which matches ⁜only⁜ X·H·T·M·L
 162 # `<script>´ elements that have a `@type´ of a plaintext type supported
 163 # by the parser. They may have multiple.
 164 PARSERS := $(patsubst ./%,%,$(wildcard $(THISDIR)/parsers/*.xslt))
 165
 166 # The list of transforms.
 167 TRANSFORMS := $(patsubst ./%,%,$(wildcard $(THISDIR)/transforms/*.xslt))
 168
 169 # List of types which should be treated as X·M·L.
 170 XMLTYPES := application/xml text/xml
 171
 172 # Set to a non·empty value to print all commands as they run.
 173 VERBOSE :=
 174
 175 # The default target for this makefile.
 176 #
 177 # Print help and exit.
 178 .DEFAULT_GOAL := help
 179
 180 # ━ § BEGIN MAKE·FILE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
 181
 182 # ─ ¶ Non‐Recipe Variable Definitions ─────────────────────────────────
 183
 184 # A variable with no value, usable when assigning values which contain
 185 # whitespace.
 186 override empty :=
 187
 188 # A variable which contains a newline, to allow the generation of
 189 # multiline strings in function calls.
 190 override define newline
 191
 192
 193 endef
 194
 195 # A variable which contains a single space.
 196 override space := $(empty) $(empty)
 197
 198 # A variable which contains a single comma.
 199 override comma := ,
 200
 201 # (callable) Quote the given string for use within shell calls.
 202 override quote = '$(subst ','"'"',$1)'
 203
 204 # Outputs an `@´ to silence rules, unless `VERBOSE´ is nonempty.
 205 override silent := $(if $(VERBOSE),,@)
 206
 207 # (callable) Escape special characters for use in sed regular
 208 # expressions.
 209 override sedesc = $(subst /,[/],$(subst $$,\$$,$(subst *,\*,$(subst .,\.,$(subst [,\[,$(subst ^,\^,$(subst \,\\,$1)))))))
 210
 211 # (callable) Percent‐decode the given strings.
 212 override perdec = $(foreach encoded,$1,$(shell $(PRINTF) '%s\n' $(call quote,$(encoded)) | $(SED) 's/|/%7C/g;s/[\]/%5C/g;s/%[0-9A-Fa-f]\{2\}/|&|/g' | $(TR) '|' '\n' | $(SED) '/^%[0-9A-Fa-f]\{2\}$$/!s/%/|%25|/' | $(TR) '|' '\n' | $(AWK) '$$0!~/%/{printf("%s",$$0)}/%/{sub("%","0x");printf("\\%04o",$$0)}' | $(XARGS) -0 $(PRINTF) '%b'))
 213
 214 # (callable) Percent‐encode the given strings.
 215 #
 216 # This singly‐encodes u·r·i characters and doubly‐encodes other
 217 # characters, then calls `perdec´ to decode back to a single encoding.
 218 # The encoding assumes the input is a “u·r·i component”; e·g that the
 219 # resulting string should only contain `pchar´ (but can contain any
 220 # `sub-delim´).
 221 override perenc = $(foreach unencoded,$1,$(call perdec,$(shell $(PRINTF) '%s' $(call quote,$(unencoded)) | $(OD) -t x1 | $(SED) 's/^[0-9]*//;s/2[146-9A-Ea-e]/%&/g;s/3[0-9AaBbDd]/%&/g;s/40/%&/g;s/[46][1-9A-Fa-f]/%&/g;s/[57][0-9Aa]/%&/g;s/7[Ee]/%&/g;s/[ ][0-9A-Fa-f]\{2\}/%25&/g' | $(TR) -d ' \n' | $(TR) 'abcdef' 'ABCDEF')))
 222
 223 # (callable) Percent‐encode each component in the given paths.
 224 override pathenc = $(foreach path,$1,$(subst $(space),/,$(call perenc,$(subst /, ,$(path)))))
 225
 226 # (overridable) Collect all of the applicable includes from the
 227 # includes directory.
 228 sourceincludes := $(shell $(FIND) $(foreach dir,$(INCLUDEDIR),$(call quote,$(dir))) -type f '(' $(FINDRULES) ')')
 229
 230 # (overridable) Collect all of the applicable source files from the
 231 # source directory, removing any which are also includes.
 232 sourcefiles := $(filter-out $(sourceincludes),$(shell $(FIND) $(foreach dir,$(SRCDIR),$(call quote,$(dir))) -type f '(' $(FINDRULES) ')'))
 233
 234 ifdef GIT
 235 ifneq ($(wildcard $(THISDIR)/.git),)
 236 # (overridable) The name of the current revision of ⛩️📰 书社, or its
 237 # hash if the current revision is not a tag.
 238 thisrev = $(shell cd $(THISDIR); $(GIT) describe 2> /dev/null || $(GIT) rev-parse HEAD)
 239 endif
 240
 241 ifneq ($(wildcard .git),)
 242 # (overridable) The name of the current revision of the working
 243 # directory, or its hash if the current revision is not a tag.
 244 srcrev = $(shell $(GIT) describe 2> /dev/null || $(GIT) rev-parse HEAD)
 245 endif
 246 endif
 247
 248 # Figure out the file type of each source file and source include.
 249 ifneq ($(wildcard $(BUILDDIR)/magic.mgc),)
 250 override types := $(shell $(SED) 's/^ *//;s/ *$$//;s/ {2,}/ /g' <<< $(call quote,$(sourcefiles) $(sourceincludes)) | $(TR) ' ' '\n' | $(FILE) -m $(call quote,$(BUILDDIR)/magic.mgc) --mime-type --separator '|' --files-from - | $(SED) 's/| */|/g')
 251 endif
 252
 253 # Get the list of supported plaintext file types from the parser.
 254 ifneq ($(wildcard $(BUILDDIR)/parser.xslt),)
 255 override plaintexttypes := $(filter-out $(XMLTYPES),$(shell $(XMLLINT) --xpath '/*/*[@name="书社:parsers"]//*[namespace-uri()="http://www.w3.org/1999/xhtml" and local-name()="dd"]/text()' $(call quote,$(BUILDDIR)/parser.xslt)))
 256 endif
 257
 258 # (callable) Get all of the files (source and includes) which have the
 259 # given types.
 260 override filesoftype = $(foreach type,$1,$(patsubst %|$(type),%,$(filter %|$(type),$(types))))
 261
 262 # Build up collections of various file types.
 263 override xmlfiles := $(call filesoftype,$(XMLTYPES))
 264 override plaintextfiles := $(filter-out $(xmlfiles),$(call filesoftype,$(plaintexttypes)))
 265 override assetfiles := $(filter-out $(xmlfiles) $(plaintextfiles),$(sourcefiles) $(sourceincludes))
 266
 267 # (callable) Get the types of the given files.
 268 override typeoffile = $(patsubst $(foreach file,$1,$(file)|%),%,$(filter $(foreach file,$1,$(file)|%),$(types)))
 269
 270 # (callable) Get the identifier for the given parser or transform.
 271 override id = $(or $(shell $(XMLLINT) --xpath '/*/*[local-name()="id" and namespace-uri()="urn:fdc:ladys.computer:20231231:Shu1She4"]/text()[1]' $1),about:shushe?$(or $2,unknown)=$(call pathenc,$(basename $(notdir $1))))
 272
 273 # (callable) Get the local path for the given source file.
 274 override sourcepath = $(firstword $(foreach directory,$(SRCDIR),$(if $(filter $(directory)/%,$1),$(patsubst $(directory)/%,%,$1),)))
 275
 276 # (callable) Get the local path for the given include.
 277 override includepath = $(firstword $(foreach directory,$(INCLUDEDIR),$(if $(filter $(directory)/%,$1),$(patsubst $(directory)/%,%,$1),)))
 278
 279 # (callable) Get base64 data u·r·i’s for the given files.
 280 override datauri = $(foreach file,$1,data:$(call typeoffile,$(file));base64,$(shell $(UUENCODE) -m -r $(call quote,$(file)) _ | tr -d ' \n'))
 281
 282 # Pair each source file and include with its local u·r·i.
 283 override sourcelocalpair := $(foreach file,$(sourcefiles) $(sourceincludes),$(file)|about:shushe?$(if $(filter $(file),$(sourceincludes)),include=$(call pathenc,$(call includepath,$(file))),source=$(call pathenc,$(call sourcepath,$(file)))))
 284
 285 # (callable) Get local uris for the given files.
 286 override localuri = $(foreach file,$1,$(patsubst $(file)|%,%,$(filter $(file)|%,$(sourcelocalpair))))
 287
 288 # (callable) Get the source files for the given local uris.
 289 override sourcefile = $(foreach local,$1,$(patsubst %|$(local),%,$(filter %|$(local),$(sourcelocalpair))))
 290
 291 # Adds a requirement on `$(BUILDDIR)/.update-types´ if the file is
 292 # present.
 293 #
 294 # This file is created after a reload due to type changes, and is
 295 # removed after. Requiring it ensures that file classifications are
 296 # up‐to‐date immediately after the reload.
 297 override typeupdates := $(wildcard $(BUILDDIR)/.update-types)
 298
 299 # Pair each source file and include with its parsed location.
 300 override sourceparsedpair := $(foreach file,$(sourcefiles) $(sourceincludes),$(file)|$(BUILDDIR)/$(if $(filter $(file),$(sourceincludes)),includes/$(call includepath,$(file)),sources/$(call sourcepath,$(file))))
 301
 302 # (callable) Get the location of the transformed X·M·L files for the
 303 # given source files.
 304 override parsed = $(foreach file,$1,$(patsubst $(file)|%,%,$(filter $(file)|%,$(sourceparsedpair))))
 305
 306 # (callable) Get the source files for the given parsed file.
 307 override unparsed = $(foreach file,$1,$(patsubst %|$(file),%,$(filter %|$(file),$(sourceparsedpair))))
 308
 309 ifneq ($(wildcard $(BUILDDIR)/dependencies),)
 310 # Pair each file with a list of dependencies for it.
 311 override dependenciesforfile := $(foreach file,$(sourcefiles),$(file)|$(subst $(space),|,$(shell $(CAT) $(call quote,$(BUILDDIR)/dependencies) | $(SED) $(call quote,/^$(call sedesc,$(call localuri,$(file)))$$/$(comma)/^[^   ]/!d;/^ /!d;s/^ //))))
 312
 313 # (callable) Get the list of dependency leiris for the given source
 314 # files.
 315 #
 316 # Recursive dependencies are marked with a leading `-´.
 317 override dependencyuris = $(foreach file,$1,$(subst |, ,$(patsubst $(file)|%,%,$(filter $(file)|%,$(dependenciesforfile)))))
 318
 319 # (callable) Get the list of recursive dependencies for the given
 320 # source files.
 321 override recursives = $(foreach uri,$(filter -%,$(call dependencyuris,$1)),$(call sourcefile,$(patsubst -%,%,$(uri))))
 322
 323 # (callable) Get the list of (nonrecursive) dependencies for the given
 324 # source files.
 325 override dependencies = $(foreach uri,$(filter-out -%,$(call dependencyuris,$1)),$(call sourcefile,$(uri)))
 326 endif
 327
 328 # Collect all files with recursive dependencies.
 329 override recursivefiles := $(foreach file,$(filter-out $(assetfiles),$(sourcefiles)),$(if $(call recursives,$(file)),$(file),))
 330
 331 # Collect all files which should be compiled.
 332 #
 333 # This is all of the non·asset, nonrecursive files.
 334 override compilablefiles := $(filter-out $(assetfiles) $(recursivefiles),$(sourcefiles))
 335
 336 ifneq ($(wildcard $(BUILDDIR)/destinations),)
 337 # Get the output of the destination transform.
 338 override destinations := $(shell $(CAT) $(BUILDDIR)/destinations)
 339
 340 # Pair source files and their destinations.
 341 override sourcedestinationpair := $(foreach destination,$(destinations),$(call sourcefile,$(firstword $(subst |, ,$(destination))))|$(call perdec,$(subst $(space),|,$(wordlist 2,$(words $(subst |, ,$(destination))),$(subst |, ,$(destination))))))
 342
 343 # (callable) Get the destination for the given source files.
 344 override destination = $(foreach file,$1,$(patsubst $(file)|%,%,$(filter $(file)|%,$(sourcedestinationpair))))
 345
 346 # Pair each source file and include with its compiled location.
 347 override sourcecompiledpair := $(foreach file,$(sourcefiles) $(sourceincludes),$(file)|$(BUILDDIR)/public/$(call destination,$(file)))
 348
 349 # (callable) Get the location of the transformed X·M·L files for the
 350 # given source files.
 351 override compiled = $(foreach file,$1,$(patsubst $(file)|%,%,$(filter $(file)|%,$(sourcecompiledpair))))
 352
 353 # (callable) Get the source files for the given compiled file.
 354 override uncompiled = $(foreach file,$1,$(patsubst %|$(file),%,$(filter %|$(file),$(sourcecompiledpair))))
 355
 356 # (callable) Get the installed locations for the given source files.
 357 override installed = $(foreach file,$1,$(DESTDIR)/$(call destination,$(file)))
 358 endif
 359
 360 # ─ ¶ Recipe Variable Definitions ─────────────────────────────────────
 361
 362 # (callable) Check to see if the given directory exists and
 363 # create it if not.
 364 override ensuredirectory = if $(TEST) ! -d $(call quote,$1); then $(MKDIR) -p $(call quote,$1); fi
 365
 366 # (callable) Sanitize and wrap the provided plaintext file in
 367 #  X·M·L, printing to `stdout´.
 368 override wrapplaintext = $(PRINTF) '%s\n' "$$($(PRINTF) '%b' '<?xml version=\042\061.0\042?>\n<script xmlns=\042http://www.w3.org/1999/xhtml\042 type=\042$(call typeoffile,$1)\042><![CDATA['; $(CAT) $(call quote,$1) | $(TR) '\000\013\014' '\032\011\012' | $(SED) $$($(PRINTF) '%s%b' 's/]]>/]]]]><!\[CDATA\[>/g;s/\xEF\xBF\xBE/�/g;s/\xEF\xBF\xBF/�/g;$$!s/\r$$//g;s/\r/\n/g;$$!s/\xC2\x85$$//g;s/\xC2\x85/\n/g;s/\xE2\x80\xA8/\n/g;' 's/[\0001-\0010]/�/g;s/[\0016-\0037]/�/g'); $(PRINTF) '%s' ']]></script>')"
 369
 370 # ─ ¶ Phony Targets ───────────────────────────────────────────────────
 371
 372 # Provide help.
 373 help:
 374         $(silent)$(PRINTF) '%b' '$(subst $(newline),\n,$(makefileinfo))'
 375
 376 # Compile all files, or error if any are recursive.
 377 all: $(call compiled,$(recursivefiles) $(compilablefiles) $(filter $(sourcefiles),$(assetfiles))) ;
 378
 379 # Destroy buildfiles.
 380 clean:
 381         $(silent)$(RM) -rf $(BUILDDIR)/
 382
 383 # Destroy buildfiles and the install directory.
 384 gone:
 385         $(silent)$(RM) -rf $(BUILDDIR)/ $(call compiled,$(recursivefiles) $(compilablefiles))
 386
 387 # Install the compiled files into `DESTDIR´.
 388 install: $(call installed,$(recursivefiles) $(compilablefiles) $(filter $(sourcefiles),$(assetfiles))) ;
 389
 390 # List all source files and includes and their computed types.
 391 list:
 392         $(silent)$(PRINTF) '%b' $(call quote,$(foreach file,$(sort $(sourcefiles)) $(sort $(sourceincludes)),\0033[1m$(file)\0033[22m|$(call typeoffile,$(file))|[\0033[3m$(if $(filter $(file),$(xmlfiles)),xml,$(if $(filter $(file),$(plaintextfiles)),text,asset))$(if $(filter $(file),$(sourceincludes)),|include,)\0033[23m]$(if $(call dependencies,$(file))$(call recursives,$(file)), $(strip $(foreach recursive,$(call recursives,$(file)),\0033[93;41m•|Recursive|Dependency|\0033[39;49m|$(recursive)) $(foreach dependency,$(call dependencies,$(file)),\0033[2m•|Dependency|\0033[22m|$(dependency))))$(if $(filter $(file),$(sourcefiles)), →|<\0033[4m/$(call destination,$(file))\0033[24m>,) )) | $(TR) ' |' '\n '
 393
 394 # Raise an error when attempting to build any files with recursive
 395 # dependencies.
 396 $(call compiled,$(recursivefiles)):
 397         @$(PRINTF) '%b\n' $(call quote,\0033[93;41mError:\0033[39;49m `$(call uncompiled,$@)´ has recursive dependencies:\n$(subst |, ,$(subst $(space),$(newline),$(foreach recursive,$(call recursives,$(call uncompiled,$@)),•|$(recursive))))) && false
 398
 399 # ─ ¶ Special Targets ─────────────────────────────────────────────────
 400
 401 # Perform secondary expansion; this enables pattern rules to determine
 402 # their prerequisites based on the matched pattern.
 403 .SECONDEXPANSION: ;
 404
 405 # Don’t use any implicit rules.
 406 .SUFFIXES: ;
 407
 408 # Phony rules; always consider these out‐of‐date.
 409 .PHONY: all default clean gone info install list $(call compiled,$(recursivefiles));
 410
 411 ifneq ($(wildcard $(BUILDDIR)/.update-types)$(wildcard $(BUILDDIR)/dependencies),)
 412 # Reload this make·file if the dependency graph has changed.
 413 #
 414 # This graph is a dependency for some of the variables that this
 415 # make·file uses, so it’s important to ensure that they are actually
 416 # up‐to‐date prior to executing any later rules.
 417 #
 418 # This recipe only exists after types have been updated or when the
 419 # dependency graph already exists.
 420 $(THISDIR)/GNUmakefile:: $(BUILDDIR)/dependencies $(BUILDDIR)/destinations
 421         $(silent)$(TOUCH) $(THISDIR)/GNUmakefile
 422         $(silent)$(RM) -f $(BUILDDIR)/.update-types
 423         @$(PRINTF) '%b\n' '\0033[1mDependency graph and output destinations updated. Restarting…\0033[22m'
 424 endif
 425
 426 ifeq ($(wildcard $(BUILDDIR)/.update-types),)
 427 # Reload this make·file if any of the magic files or parsers have
 428 # changed.
 429 #
 430 # These are used to classify source files, so if they have changed then
 431 # the make·file must be reloaded.
 432 #
 433 # This recipe sleeps for one second to ensure that files built after
 434 # the restart have a more current time·stamp.
 435 $(THISDIR)/GNUmakefile:: $(BUILDDIR)/magic.mgc $(BUILDDIR)/parser.xslt
 436         $(silent)$(TOUCH) $(THISDIR)/GNUmakefile
 437         $(silent)$(RM) -f $(call quote,$(BUILDDIR)/dependencies)
 438         @$(PRINTF) '%b\n' '\0033[1mMagic file or parsers have updated. Restarting…\0033[22m'
 439         $(silent)$(SLEEP) 1
 440         $(silent)$(TOUCH) $(call quote,$(BUILDDIR)/.update-types)
 441 endif
 442
 443 # ─ ¶ Build Targets ───────────────────────────────────────────────────
 444
 445 # Generate the compiled magic file from its sources.
 446 #
 447 # It must be updated if any of the files in the magic directory change.
 448 # It ⁜also⁜ should be updated if any of the files in the magic
 449 # directory are deleted, but this isn’t tracked presently.
 450 $(BUILDDIR)/magic.mgc: $(wildcard $(MAGICDIR)/*)
 451         @$(ECHO) "Compiling new magic…"
 452         $(silent)$(call ensuredirectory,$(dir $@))
 453         $(silent)cd $(call quote,$(BUILDDIR)) && $(FILE) -C -m $(call quote,$(realpath $(MAGICDIR)))
 454
 455 # Generate the main parser.
 456 $(BUILDDIR)/parser.catalog: $(PARSERS)
 457         @$(ECHO) "Generating catalog of parsers…"
 458         $(silent)$(XMLCATALOG) --create --noout $(call quote,$@)
 459         $(foreach parser,$(PARSERS),$(silent)$(XMLCATALOG) --add uri $(call quote,$(call id,$(parser),parser)) $(call quote,$(call pathenc,../$(parser))) --noout $(call quote,$@)$(newline))
 460 $(BUILDDIR)/parser.xslt: $(BUILDDIR)/parser.catalog $(THISDIR)/lib/catalog2parser.xslt
 461         @$(ECHO) "Generating main parser…"
 462         $(silent)$(XSLTPROC) -o $(call quote,$@) $(call quote,$(THISDIR)/lib/catalog2parser.xslt) $(call quote,$<)
 463
 464 # Parse the files.
 465 #
 466 # Even plain X·M·L files are parsed, because they may contain X·H·T·M·L
 467 # `<script>´ elements which contain other kinds of data. Asset files
 468 # are turned into H·T·M·L embeds pointing to `data:´ U·R·I’s.
 469 $(call parsed,$(sourcefiles) $(sourceincludes)): %: $$(call unparsed,$$@) $(typeupdates)
 470         @$(PRINTF) '%s\n' $(call quote,Processing `$<´…)
 471         $(silent)$(call ensuredirectory,$(dir $@))
 472         $(silent)$(if $(filter $<,$(assetfiles)),$(PRINTF) '%s\n' $(call quote,<object xmlns="http://www.w3.org/1999/xhtml" type="$(call typeoffile,$<)" data="$(call datauri,$<)"/>) > $(call quote,$@),$(if $(filter $<,$(plaintextfiles)),$(call wrapplaintext,$<),$(CAT) $(call quote,$<)) | $(XSLTPROC) -o $(call quote,$@) --stringparam BUILDTIME '$(shell TZ= $(DATE) '+%Y-%m-%dT%H:%M:%SZ')' --stringparam SRCTIME '$(shell TZ= $(STAT) -f '%Sm' -t '%Y-%m-%dT%H:%M:%SZ' $(call quote,$(call unparsed,$@)))'$(if $(thisrev), --stringparam VERSION $(call quote,$(thisrev)),)$(if $(srcrev), --stringparam SRCREV $(call quote,$(srcrev)),) $(call quote,$(BUILDDIR)/parser.xslt) -)
 473
 474 # Generate a catalog of all parsed files, for use when processing
 475 # includes. This does not depend on actually transforming the files.
 476 $(BUILDDIR)/catalog: $(sourcefiles) $(sourceincludes) $(typeupdates)
 477         @$(ECHO) "Generating catalog of parsed files…"
 478         $(silent)$(XMLCATALOG) --create --noout $(call quote,$@)
 479         $(foreach source,$(sourcefiles) $(sourceincludes),$(silent)$(XMLCATALOG) --add uri $(call quote,$(call localuri,$(source))) $(call quote,$(call pathenc,$(patsubst $(BUILDDIR)/%,%,$(call parsed,$(source))))#$(if $(filter $(source),$(assetfiles)),asset,xml)) --noout $(call quote,$@)$(newline))
 480
 481 # Build a list of dependencies for each parsed file.
 482 $(BUILDDIR)/dependencies: $(BUILDDIR)/catalog $(call parsed,$(plaintextfiles) $(xmlfiles)) $(THISDIR)/lib/catalog2dependencies.xslt
 483         @$(ECHO) "Identifying dependencies…"
 484         $(silent)$(XSLTPROC) -o $(call quote,$@) $(call quote,$(THISDIR)/lib/catalog2dependencies.xslt) $(call quote,$<)
 485
 486 # Generate a catalog of destinations for files. This depends on parsing
 487 # non·asset source files, but not assets or includes. It does not
 488 # require knowing the dependencies.
 489 $(BUILDDIR)/destinations: $(BUILDDIR)/catalog $(call parsed,$(filter-out $(assetfiles),$(sourcefiles))) $(THISDIR)/lib/catalog2destinations.xslt
 490         @$(ECHO) "Identifying output destinations…"
 491         $(silent)$(XSLTPROC) -o $(call quote,$@) $(call quote,$(THISDIR)/lib/catalog2destinations.xslt) $(call quote,$<)
 492
 493 # Generate the main transform.
 494 $(BUILDDIR)/transform.catalog: $(TRANSFORMS)
 495         @$(ECHO) "Generating catalog of transforms…"
 496         $(silent)$(XMLCATALOG) --create --noout $(call quote,$@)
 497         $(foreach transform,$(TRANSFORMS),$(silent)$(XMLCATALOG) --add uri $(call quote,$(call id,$(transform),transform)) $(call quote,$(call pathenc,../$(transform))) --noout $(call quote,$@)$(newline))
 498 $(BUILDDIR)/transform.xslt: $(BUILDDIR)/transform.catalog $(THISDIR)/lib/catalog2transform.xslt
 499         @$(ECHO) "Generating main transform…"
 500         $(silent)$(XSLTPROC) -o $(call quote,$@) $(call quote,$(THISDIR)/lib/catalog2transform.xslt) $(call quote,$<)
 501
 502 # Generate the output files using the dependencies as necessary.
 503 $(call compiled,$(compilablefiles)): $(BUILDDIR)/public/%: $$(call parsed,$$(call uncompiled,$$@)) $(BUILDDIR)/transform.xslt $$(call parsed,$$(call dependencies,$$(call uncompiled,$$@)))
 504         $(silent)$(call ensuredirectory,$(dir $@))
 505         @$(PRINTF) '%s\n' $(call quote,Compiling </$*>…)
 506         $(silent)$(XSLTPROC) -o $(call quote,$@) --stringparam CATALOG 'catalog' --stringparam BUILDTIME '$(shell TZ= $(DATE) '+%Y-%m-%dT%H:%M:%SZ')' --stringparam SRCTIME '$(shell TZ= $(STAT) -f '%Sm' -t '%Y-%m-%dT%H:%M:%SZ' $(call quote,$(call uncompiled,$@)))' --stringparam PATH $(call quote,/$*)$(if $(thisrev), --stringparam VERSION $(call quote,$(thisrev)),)$(if $(srcrev), --stringparam SRCREV $(call quote,$(srcrev)),) $(call quote,$(BUILDDIR)/transform.xslt) $(call quote,$<)
 507 $(call compiled,$(filter $(assetfiles),$(sourcefiles))): $(BUILDDIR)/public/%: $$(call uncompiled,$$@)
 508         @$(PRINTF) '%s\n' $(call quote,Compiling </$*>…)
 509         $(silent)$(call ensuredirectory,$(dir $@))
 510         $(silent)$(CP) $(call quote,$<) $(call quote,$@)
 511
 512 # Install compiled files (or error in the case of recursive ones).
 513 $(call installed,$(filter $(assetfiles),$(sourcefiles)) $(recursivefiles) $(compilablefiles)): $(DESTDIR)/%: $(BUILDDIR)/public/%
 514         @$(PRINTF) '%s\n' $(call quote,Installing </$*>…)
 515         $(silent)$(call ensuredirectory,$(dir $@))
 516         $(silent)$(CP) $(call quote,$<) $(call quote,$@)