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--
-- Copyright (c) 2021-2024 Zeping Lee
-- Released under the MIT license.
-- Repository: https://github.com/zepinglee/citeproc-lua
--
local cli = {}
local lpeg = require("lpeg")
require("lualibs")
local citeproc = require("citeproc")
local bibtex2csl -- = require("citeproc-bibtex-parser") -- load on demand
local util = require("citeproc-util")
local core = require("citeproc-latex-core")
local latex_parser = require("citeproc-latex-parser")
-- http://lua-users.org/wiki/AlternativeGetOpt
local function getopt( arg, options )
local tab = {}
for k, v in ipairs(arg) do
if string.sub( v, 1, 2) == "--" then
local x = string.find( v, "=", 1, true )
if x then tab[ string.sub( v, 3, x-1 ) ] = string.sub( v, x+1 )
else tab[ string.sub( v, 3 ) ] = true
end
elseif string.sub( v, 1, 1 ) == "-" then
local y = 2
local l = string.len(v)
local jopt
while ( y <= l ) do
jopt = string.sub( v, y, y )
if string.find( options, jopt, 1, true ) then
if y < l then
tab[ jopt ] = string.sub( v, y+1 )
y = l
else
tab[ jopt ] = arg[ k + 1 ]
end
else
tab[ jopt ] = true
end
y = y + 1
end
else
if tab.file then
error(string.format('Invalid argument "%s"', v))
end
tab.file = v
end
end
return tab
end
local function print_version()
io.write(string.format("citeproc-lua %s\n", citeproc.__VERSION__))
end
local function print_help()
io.write("Usage: citeproc-lua [options] auxname[.aux]\n")
io.write("Options:\n")
io.write(" -h, --help Print this message and exit.\n")
io.write(" -q, --quiet Quiet mode: suppress the banner and progress reports.\n")
io.write(" -V, --version Print the version number and exit.\n")
end
local function convert_bib(path, output_path)
local contents = util.read_file(path)
bibtex2csl = bibtex2csl or require("citeproc-bibtex2csl")
local csl_data = bibtex2csl.parse_bibtex_to_csl(contents, true, true, true, true)
if not output_path then
output_path = string.gsub(path, "%.bib$", ".json")
end
util.write_file(utilities.json.tojson(csl_data) .. "\n", output_path)
end
local balanced = lpeg.P{ "{" * lpeg.V(1)^0 * "}" + (1 - lpeg.S"{}") }
---@param text string
---@return string?
local function get_command_argument(text, command)
if string.match(text, command) then
local grammar = (lpeg.P(command) * lpeg.S(" \t\r\n")^0 * lpeg.C(balanced) + 1)^0
local argument = grammar:match(text)
if not argument then
return nil
end
argument = string.sub(argument, 2, -2)
return argument
end
return nil
end
---comment
---@param aux_file any
---@return string
---@return string[]
---@return Citation[]
---@return table<string, string>
---@return string[]
local function read_aux_file(aux_file)
local csl_style = nil
local csl_data_files = {}
local csl_citations = {}
local csl_options = {}
local csl_bibliographies = {}
local file = io.open(aux_file)
if not file then
util.error(string.format("Couldn't open file %s", aux_file))
return csl_style, csl_data_files, csl_citations, csl_options, csl_bibliographies
end
for line in file:lines() do
-- TODO: Use lpeg-based method and detect multiple lines
local style = get_command_argument(line, "\\csl@aux@style")
if style then
csl_style = style
else
local data = get_command_argument(line, "\\csl@aux@data")
if data then
for _, bib_file in ipairs(latex_parser.parse_seq(data)) do
table.insert(csl_data_files, bib_file)
end
else
local cite = get_command_argument(line, "\\csl@aux@cite")
if cite then
local citation = core.make_citation(cite)
table.insert(csl_citations, citation)
else
local options = get_command_argument(line, "\\csl@aux@options")
if options then
options = latex_parser.parse_prop(options)
for key, value in pairs(options) do
csl_options[key] = value
end
else
local bib = get_command_argument(line, "\\csl@aux@bibliography")
if bib then
table.insert(csl_bibliographies, bib)
else
local sub_aux_file = get_command_argument(line, "\\@input")
if sub_aux_file and util.endswith(sub_aux_file, ".aux") then
local style_name, data_files, citations, opts, bibs = read_aux_file(sub_aux_file)
if style_name then
csl_style = style_name
end
util.extend(csl_data_files, data_files)
util.extend(csl_citations, citations)
util.extend(csl_citations, citations)
for key, value in pairs(opts) do
csl_options[key] = value
end
util.extend(csl_bibliographies, bibs)
end
end
end
end
end
end
end
file:close()
return csl_style, csl_data_files, csl_citations, csl_options, csl_bibliographies
end
local function get_undefined_info(core, citation)
local res = ""
for _, cite_item in ipairs(citation.citationItems) do
if not core.item_dict[cite_item.id] then
if res ~= "" then
res = res .. ","
end
res = res .. cite_item.id
end
end
if res ~= "" then
res = string.format("\\cslsetup{undefined-cites={%s}}", res)
end
return res
end
---@param aux_file string
local function process_aux_file(aux_file)
if not util.endswith(aux_file, ".aux") then
aux_file = aux_file .. ".aux"
end
local blg_file = string.gsub(aux_file, "%.aux$", ".blg")
util.set_logging_file(blg_file)
local banner = string.format("This is citeproc-lua, Version %s", citeproc.__VERSION__)
util.info(banner)
util.info(string.format("The top-level auxiliary file: %s", aux_file))
local style_name, bib_files, citations, csl_options, bibliographies = read_aux_file(aux_file)
if style_name and style_name ~= "" then
util.info(string.format("The style file: %s.csl", style_name))
else
util.warning("Missing style name. Will use default APA style.")
style_name = "apa"
end
if #citations == 0 then
util.error(string.format("No citation commands in file %s", aux_file))
end
if #bib_files == 0 then
util.warning("empty bibliography data files")
else
for i, bib_file in ipairs(bib_files) do
util.info(string.format("Database file #%d: %s", i, bib_file))
end
end
local lang = csl_options.locale
local engine = core.init(style_name, bib_files, lang)
if not engine then
error("citeproc-lua: fails in initialize engine")
end
if csl_options.linking then
engine:enable_linking()
end
local style_class = engine:get_style_class()
if style_class == "in-text" then
for _, citation in ipairs(citations) do
citation.properties.noteIndex = 0
end
end
local citation_strings = core.process_citations(engine, citations)
-- util.debug(citation_strings)
local output_string = string.format("\\cslsetup{class = %s}\n\n", style_class)
for _, citation in ipairs(citations) do
local citation_id = citation.citationID
if citation_id ~= "@nocite" then
local citation_str = citation_strings[citation_id]
local undefined_entry_info = get_undefined_info(core, citation)
output_string = output_string .. string.format("\\cslcitation{%s}{%s%s}\n",
citation_id, undefined_entry_info, citation_str)
end
end
output_string = output_string .. "\n"
local categories_str = csl_options["categories"]
if categories_str then
core.set_categories(engine, categories_str)
end
for _, bib_filter_str in ipairs(bibliographies) do
local result = core.make_bibliography(engine, bib_filter_str)
output_string = output_string .. "\n\n\n" .. result
end
local output_path = string.gsub(aux_file, "%.aux$", ".bbl")
util.write_file(output_string, output_path)
util.quiet_mode = false;
if util.num_errors > 1 then
util.info(string.format("(There were %d error messages)", util.num_errors))
elseif util.num_errors == 1 then
util.info("(There was 1 error message)")
end
if util.num_warnings > 1 then
util.info(string.format("(There were %d warning messages)", util.num_warnings))
elseif util.num_warnings == 1 then
util.info("(There was 1 warning message)")
end
util.close_logging_file()
end
function cli.main()
local args = getopt(arg, "")
-- for k, v in pairs(args) do
-- print( k, v )
-- end
if args.V or args.version then
print_version()
return
elseif args.h or args.help then
print_help()
return
elseif args.q or args.quiet then
util.quiet_mode = true
end
if not args.file then
error("citeproc-lua: Need exactly one file argument.\n")
end
local path = args.file
local output_path = args.o or args.output
if util.endswith(path, ".bib") then
convert_bib(path, output_path)
else
process_aux_file(path)
end
if util.num_errors > 0 then
return 1
end
return 0
end
return cli
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