GNUmakefile

   1 #
   2 # Example makefile using mjotex and a BibTeX references database.
   3 #
   4
   5 # The latex compiler.
   6 LATEX = pdflatex -file-line-error -halt-on-error
   7
   8 # The name of this document.
   9 #
  10 # For example, to use the name of our parent directory:
  11 #
  12 # PN = $(notdir $(realpath .))
  13 #
  14 PN = examples
  15
  16 # A space-separated list of bib files. These must all belong to paths
  17 # contained in your $BIBINPUTS environment variable.
  18 #
  19 # Leave commented if you don't use a bibliography database.
  20 #
  21 #BIBS = references.bib
  22
  23 # A space-separated list of the mjotex files that you use. The path to
  24 # mjotex must be contain in your $TEXINPUTS environment variable.
  25 #
  26 # MJOTEX  = mjotex.sty
  27 #
  28 MJOTEX  = mjo-algebra.tex mjo-algorithm.tex mjo-arrow.tex mjo-calculus.tex
  29 MJOTEX += mjo-common.tex mjo-complex.tex mjo-cone.tex mjo-convex.tex
  30 MJOTEX += mjo-eja.tex mjo-font.tex mjo-linear_algebra.tex mjo-listing.tex
  31 MJOTEX += mjo-misc.tex mjo-proof_by_cases.tex mjo-theorem.tex
  32 MJOTEX += mjo-theorem-star.tex mjo-topology.tex mjo.bst
  33
  34 # Compile a list of raw source code listings (*.listing) and their
  35 # associated output files (*.py) that will be tested by check-sage.
  36 SAGE_LISTING_SRCS = $(wildcard sage_listings/*.listing)
  37 SAGE_LISTING_DSTS = $(patsubst %.listing,%.py,$(SAGE_LISTING_SRCS))
  38
  39 # Use kpsewhich (from the kpathsea suite) to find the absolute paths
  40 # of the bibtex/mjotex files listed in in $(BIBS)/$(MJOTEX). The SRCS
  41 # variable should contain all (Bib)TeX source files for the document.
  42 SRCS = $(PN).tex
  43 ifdef BIBS
  44 BIBPATHS = $(shell kpsewhich $(BIBS))
  45 SRCS += $(BIBPATHS)
  46 endif
  47 ifdef MJOTEX
  48 MJOTEXPATHS = $(shell kpsewhich $(MJOTEX))
  49 SRCS += $(MJOTEXPATHS)
  50 endif
  51 ifdef SAGE_LISTING_DSTS
  52 SRCS += $(SAGE_LISTING_DSTS)
  53 endif
  54
  55 # The first target is the default, so put the PDF document first.
  56 #
  57 # This voodoo is all designed to find a "fixed point" of calling
  58 # $(LATEX). When you build a LaTeX document, it requires an unknown
  59 # number of compilation passes. How do you know when to stop? Easy,
  60 # stop when the output file stops changing! But how to encode that
  61 # in a makefile?
  62 #
  63 # At the start of this target, we call $(LATEX) to compile $(PN).tex.
  64 # If you ignore the "sed" for now, then the next step is to check for
  65 # the existence of a "previous" file. If there isn't one, this is the
  66 # first time that we've tried to build the PDF. In that case, take the
  67 # PDF that we've just built and make *that* the previous file. Then
  68 # start all over. If there is a previous file, then this is the second
  69 # (or more) time that we've tried to build the PDF. We diff the PDF
  70 # file that we've just built against the previous file; if they're the
  71 # same, then we've succeeded and stop. Otherwise, we make the new PDF
  72 # the previous file, and start all over. The end result is that we
  73 # will loop until the newly-created PDF and the previous file are
  74 # identical.
  75 #
  76 # But what about the "sed" call? By default, pdflatex will compile the
  77 # creation date, modification date, and a unique ID into the output
  78 # PDF. That means that two otherwise-identical documents, created
  79 # seconds apart, will look different. We only need to know when the
  80 # *contents* of the document are the same -- we don't care about the
  81 # metadata -- so sed is used to remove those three nondeterministic
  82 # pieces of information.
  83 #
  84 # The creation and modification dates should become optional in pdftex
  85 # v1.40.17 thanks to Debian's SOURCE_DATE_EPOCH initiative. When that
  86 # version of pdflatex makes it into TeX Live 2016, we can replace
  87 # those two sed scripts with something smarter.
  88 #
  89 $(PN).pdf: $(SRCS) $(PN).bbl
  90         $(LATEX) $(PN).tex
  91
  92         sed --in-place \
  93             -e '/^\/ID \[<.*>\]/d' \
  94             -e "s/^\/\(ModDate\) (.*)/\/\1 (D:19700101000000Z00'00')/" \
  95             -e "s/^\/\(CreationDate\) (.*)/\/\\1 (D:19700101000000Z00'00')/" \
  96             $@
  97
  98         if [ ! -f $@.previous ]; then \
  99                 mv $@ $@.previous; \
 100                 $(MAKE) $@; \
 101         fi;
 102
 103         if cmp -s $@ $@.previous; then \
 104                 rm $@.previous; \
 105         else \
 106                 mv $@ $@.previous; \
 107                 $(MAKE) $@; \
 108         fi;
 109
 110
 111 $(PN).aux: $(SRCS)
 112         $(LATEX) $(PN).tex
 113
 114
 115 # The pipe below indicates an "order-only dependency" on the aux file.
 116 # Without it, every compilation of $(PN).tex would produce a new
 117 # $(PN).aux, and thus $(PN).bbl would be rebuilt. This in turn causes
 118 # $(PN).pdf to appear out-of-date, which leads to a recompilation of
 119 # $(PN).tex... and so on. The order-only dependency means we won't
 120 # rebuild $(PN).bbl if $(PN).aux changes.
 121 #
 122 # As a side effect, we now need to depend on $(SRCS) here, since we
 123 # won't pick it up transitively from $(PN).aux.
 124 #
 125 # If the $BIBS variable is undefined, we presume that there are no
 126 # references and create an empty bbl file. Otherwise, we risk trying
 127 # to run biblatex on an aux file containing no citations. If you do
 128 # define $BIBS but don't cite anything, you'll run into a similar
 129 # problem. Don't do that.
 130 #
 131 $(PN).bbl: $(SRCS) | $(PN).aux
 132 ifdef BIBS
 133         bibtex $(PN).aux
 134 else
 135         echo -n '' > $@
 136 endif
 137
 138 # If the output PDF exists but the log file does not, then an attempt
 139 # to "build the log file" (i.e. build the PDF) would do nothing. Thus
 140 # whenever the log file does not exist, we do a fresh build.
 141 $(PN).log: $(SRCS)
 142         $(MAKE) clean
 143         $(MAKE)
 144
 145 # How do we convert a raw listing into something testable by sage? We
 146 # append/prepend triple quotes to make the whole thing into a doctest.
 147 sage_listings/%.py: sage_listings/%.listing
 148         echo '"""' > $@ && cat $< >> $@ && echo '"""' >> $@
 149
 150 # Ensure that there are no overfull or underfull boxes in the output
 151 # document by parsing the log for said warnings.
 152 .PHONY: check-boxes
 153 check-boxes: $(PN).log
 154         @! grep -i 'overfull\|underfull' $<
 155
 156 # Run chktex to find silly mistakes. There is some exit code weirdness
 157 # (Savannah bug 45979), so we just look for empty output.
 158 .PHONY: check-chktex
 159 CHKTEX = chktex --localrc .chktexrc --quiet --inputfiles=0
 160 check-chktex:
 161         @[ -z "$(shell $(CHKTEX) mjotex.sty)" ]
 162
 163 # Ensure that there are no undefined references in the document by
 164 # parsing the log file for said warnings.
 165 .PHONY: check-undefined
 166 check-undefined: $(PN).log
 167         @! grep -i 'undefined' $<
 168
 169 # Use sage to doctest any \sagelisting{}s in SAGE_LISTING_DSTS.
 170 # The actuall command is ifdef'd so that we can comment out
 171 # the definition of SAGE_LISTING_DSTS without breaking the
 172 # default definition of the "check" target.
 173 .PHONY: check-sage
 174 check-sage: $(SAGE_LISTING_DSTS)
 175 ifdef SAGE_LISTING_DSTS
 176         PYTHONPATH="$(HOME)/src/sage.d" \
 177           sage -t --timeout=0 --memlimit=0 \
 178           $^
 179 endif
 180
 181 # Run a suite of checks.
 182 .PHONY: check
 183 check: check-boxes check-chktex check-undefined check-sage
 184
 185 # Clean up leftover junk. This only looks overcomplicated because
 186 # the *.{foo,bar} syntax supported by Bash is not POSIX, and Make
 187 # will execute these commands using /bin/sh (which should be POSIX).
 188 JUNK_EXTENSIONS  = aux bbl bcf bib blg listing lof log nav out pdf
 189 JUNK_EXTENSIONS += snm spl toc xml
 190 .PHONY: clean
 191 clean:
 192         for ext in $(JUNK_EXTENSIONS); do rm -f *.$$ext; done;
 193         rm -rf dist/
 194         rm -f $(SAGE_LISTING_DSTS)
 195
 196 # If this document will be published, the publisher isn't going to
 197 # have your BibTeX database or your mjotex files. So, you need to
 198 # package them up along with the code for your document. This target
 199 # will create a "dist" directory and copy the necessary stuff there.
 200 #
 201 .PHONY: dist
 202 dist: $(PN).bbl
 203         mkdir -p dist
 204         cp $(SRCS) $(PN).bbl $(BIBPATHS) $(MJOTEXPATHS) dist/