37ef57b · typeable/pandoc

git.iko.soy/typeable/pandoc

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lua-filters.md: use pandoc.system module in TikZ example

37ef57bAlbert Krewinkel6 years ago

doc/lua-filters.md+48−39

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@@ -653,59 +653,68 @@ document is built. (A more sophisticated version of this might

653put these in a special cache directory.)

654

655``` lua

656+local system = require 'pandoc.system'

657+

658+local tikz_doc_template = [[

659+\documentclass{standalone}

660+\usepackage{xcolor}

661+\usepackage{tikz}

662+\begin{document}

663+\nopagecolor

664+%s

665+\end{document}

666+]]

667+

656local function tikz2image(src, filetype, outfile)

668local function tikz2image(src, filetype, outfile)

657− local tmp = os.tmpname()

669+ system.with_temporary_directory('tikz2image', function (tmpdir)

658− local tmpdir = string.match(tmp, "^(.*[\\/])") or "."

670+ system.with_working_directory(tmpdir, function()

659− local f = io.open(tmp .. ".tex", 'w')

671+ local f = io.open('tikz.tex', 'w')

660− f:write("\\documentclass{standalone}\n\\usepackage{xcolor}\n\\usepackage{tikz}\n\\begin{document}\n\\nopagecolor\n")

672+ f:write(tikz_doc_template:format(src))

661− f:write(src)

662− f:write("\n\\end{document}\n")

663− f:close()

673+ f:close()

664− os.execute("pdflatex -output-directory " .. tmpdir .. " " .. tmp)

674+ os.execute('pdflatex tikz.tex')

665− if filetype == 'pdf' then

675+ if filetype == 'pdf' then

666− os.rename(tmp .. ".pdf", outfile)

676+ os.rename('tikz.pdf', outfile)

667− else

677+ else

668− os.execute("pdf2svg " .. tmp .. ".pdf " .. outfile)

678+ os.execute('pdf2svg tikz.pdf ' .. outfile)

669− end

679+ end

670− os.remove(tmp .. ".tex")

680+ end)

671− os.remove(tmp .. ".pdf")

681+ end)

672− os.remove(tmp .. ".log")

673− os.remove(tmp .. ".aux")

674end

682end

675

683

676extension_for = {

684extension_for = {

677− html = 'svg',

685+ html = 'svg',

678− html4 = 'svg',

686+ html4 = 'svg',

679− html5 = 'svg',

687+ html5 = 'svg',

680− latex = 'pdf',

688+ latex = 'pdf',

681− beamer = 'pdf' }

689+ beamer = 'pdf' }

682

690

683local function file_exists(name)

691local function file_exists(name)

684− local f = io.open(name, 'r')

692+ local f = io.open(name, 'r')

685− if f ~= nil then

693+ if f ~= nil then

686− io.close(f)

694+ io.close(f)

687− return true

695+ return true

688− else

696+ else

689− return false

697+ return false

690− end

698+ end

691end

699end

692

700

693local function starts_with(start, str)

701local function starts_with(start, str)

694− return str:sub(1, #start) == start

702+ return str:sub(1, #start) == start

695end

703end

696

704

697

705

698function RawBlock(el)

706function RawBlock(el)

699− if starts_with("\\begin{tikzpicture}", el.text) then

707+ if starts_with('\\begin{tikzpicture}', el.text) then

700− local filetype = extension_for[FORMAT] or "svg"

708+ local filetype = extension_for[FORMAT] or 'svg'

709+ local fname = system.get_working_directory() .. '/' ..

701− local fname = pandoc.sha1(el.text) .. "." .. filetype

710+ pandoc.sha1(el.text) .. '.' .. filetype

702− if not file_exists(fname) then

711+ if not file_exists(fname) then

703− tikz2image(el.text, filetype, fname)

712+ tikz2image(el.text, filetype, fname)

704− end

705− return pandoc.Para({pandoc.Image({}, fname)})

706− else

707− return el

708 end

713 end

714+ return pandoc.Para({pandoc.Image({}, fname)})

715+ else

716+ return el

717+ end

709end

718end

710```

719```

711

720