277 lines
6.8 KiB
Lua
277 lines
6.8 KiB
Lua
---------------------------------- LITERATE ----------------------------------
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-- Variable for all literate stuff
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local lit = {}
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-- Status indicator
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lit.status = true
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-- Valid metadata structure
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lit.metastruct = {
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["mandatory"] = {
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-- Value as table == whole patterns to match
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["id"] = {"%a[_%w]*"},
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},
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["optional"] = {
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["lang"] = {"lua", "fennel", "python", "js", "ruby", "lisp", "graphviz"},
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["cmd"] = {".+"},
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-- Value as string == type to match
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["args"] = "table",
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["shift"] = "boolean",
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["wipe"] = "boolean",
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["typed"] = "boolean",
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["link"] = "path",
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["img"] = "path",
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["alt"] = "string",
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["dump"] = "path",
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["quote"] = "boolean",
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},
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}
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-- Grammars
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function lit.g(name)
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-- Lexical elements
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local newline = lpeg.P"\r"^-1 * lpeg.P"\n"
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local space = lpeg.S" \t"
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local anyspace = lpeg.S" \t\r\n"
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local spot = (1 - anyspace)
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local any = (spot + space)
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local yamlheader = space^0 * lpeg.P"---" * space^0 * newline
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local yamlfooter = space^0 * lpeg.P"..." * space^0 * newline^-1
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local yamlbody = -yamlfooter * any^0 * newline
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local id = lpeg.R("az", "AZ") * lpeg.R("az", "AZ", "09")^0
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local ref = lpeg.P"#" * id
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local grammars = {
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-- Blocks grammar
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["block"] = lpeg.P {
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"Block";
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Block = lpeg.Ct(lpeg.V"YAML" * lpeg.V"Code", "name");
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YAML = lpeg.C(yamlheader * yamlbody^0 * yamlfooter);
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Code = lpeg.C((any + newline)^0);
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},
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}
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return grammars[name]
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end
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-- Evals Lisp code
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--[[
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function lit.eval(code)
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local is_passed, out = pcall (
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function () return fennel.eval(code) end,
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function (e) return e end
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)
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local lua = ""
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local out = tostring(out)
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local preview = out:gsub("\n.*", "")
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if is_passed then
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lua = fennel.compileString(code)
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end
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return {is_passed = is_passed, preview = preview, out = out, lua = lua}
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end
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]]--
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function lit.meta2table(meta)
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local function stringify(content)
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local function stringify_quoted(quoted)
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local quote = (quoted.quotetype == SingleQuoted and '"' or "'")
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quoted = pandoc.utils.stringify(quoted.content)
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return pandoc.Str(quote .. quoted .. quote)
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end
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local function stringify_rawinline(rawinline)
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local str = rawinline.text
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str = str:gsub("\\n", "\n"):gsub("\\t", "\t")
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return pandoc.Str(str)
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end
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if pandoc.utils.type(content) == "Inlines" then
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return pandoc.utils.stringify(content:walk {
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Quoted = function(e) return stringify_quoted(e) end,
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RawInline = function(e) return stringify_rawinline(e) end,
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Inline = function(inline) return pandoc.utils.stringify(inline) end,
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})
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else
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return pandoc.utils.stringify(content)
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end
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end
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local function string2other(str)
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if str == "true" or str == "false" then
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return str == "true"
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-- Note that "1" always num;
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-- cfr. https://pandoc.org/lua-filters.html#type-metavalue
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elseif tonumber(str) then
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return tonumber(str)
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else
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return str
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end
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end
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for k, v in pairs(meta) do
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if pandoc.utils.type(v) == "table" then
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meta[k] = lit.meta2table(v)
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else
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meta[k] = string2other(stringify(v))
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end
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end
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return meta
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end
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function lit.puts(key, ...)
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local function debuglevel(str)
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if str == "ERROR" then
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lit.status = false
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return 2
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elseif str == "WARNING" then
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return 1
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else
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return 0
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end
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end
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local function getmsg(key, ...)
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local function setmsg(msg, ...)
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local lang = os.lang()
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msg = (msg[lang] ~= nil and msg[lang] or msg)
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for i, str in ipairs({...}) do
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msg = msg:gsub("#" .. i, str)
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end
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return msg
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end
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local msg = lit.meta2table(pandoc.read([[#locale()]]).meta)
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local levelname, level = "INFO", 0
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for mtype, msgs in pairs(msg) do
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if msgs[key] ~= nil then
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key = setmsg(msgs[key], ...)
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levelname, level = mtype, debuglevel(mtype)
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break
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end
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end
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return key, levelname, level
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end
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local verbosity = debuglevel(PANDOC_STATE.verbosity)
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local msg, levelname, level = getmsg(key, ...)
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if level >= verbosity then
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print("[" .. levelname .. "] [LIT] " .. msg)
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end
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end
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-- TODO
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function lit.assert(e, status)
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if status == false then
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lit.puts("aborted")
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os.exit(1)
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end
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return e
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end
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function lit.getblock(codeblock)
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local function checkextra(meta)
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for key, val in pairs(meta) do
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local missing1 = lit.metastruct["mandatory"][key] == nil
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local missing2 = lit.metastruct["optional"][key] == nil
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if missing1 and missing2 then
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lit.puts("invalid_key", key)
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end
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end
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end
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local function checkmeta(meta, kind)
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local function checktype(type1, meta, key)
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local val = meta[key]
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local type2 = type(val)
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if type1 ~= type2 then
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if type1 == "path" then
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if not(pandoc.path.directory(val):isdir()) then
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lit.puts("invalid_path", val, key)
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end
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else
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lit.puts("invalid_type", type2, key)
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end
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end
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end
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local function checktable(table, meta, key)
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local function checkmatch(table, val, key)
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for _, pattern in pairs(table) do
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if val:match("^" .. pattern .. "$") then
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return ""
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end
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end
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return key
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end
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local val = meta[key]
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local err = checkmatch(table, val, key)
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if not(err:isempty()) then
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lit.puts("invalid_value", val, err)
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end
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end
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for key, val in pairs(lit.metastruct[kind]) do
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if meta[key] == nil and kind == "mandatory" then
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lit.puts("no_key", key)
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elseif meta[key] and type(val) == "table" then
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checktable(val, meta, key)
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elseif meta[key] then
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checktype(val, meta, key)
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end
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end
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end
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local function setmeta(meta)
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local tmeta = lit.meta2table(meta)
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checkmeta(tmeta, "mandatory")
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checkmeta(tmeta, "optional")
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checkextra(tmeta)
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-- TODO checks for 2) duplicates
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-- Set defaults if lit.status = true
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return meta
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end
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local function parseyaml(rawyaml)
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-- TODO io.try
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local yaml = io.popen("pandoc -t json <<<\"" .. rawyaml .. "\" 2>&1")
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if yaml:read("*l"):sub(1, 1) == "{" then
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yaml = pandoc.read(rawyaml).meta
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if pandoc.utils.stringify(yaml):isempty() then
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lit.puts("yaml_empty")
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else
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return setmeta(yaml)
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end
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else
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lit.puts("yaml_invalid")
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return nil
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end
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end
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local function inspect(parsed)
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lit.puts("parsing", table.concat(parsed, ""):indent())
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local yaml = parseyaml(parsed[1])
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-- TODO: parsecode
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return "TODO"
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end
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local parsed = lpeg.match(lit.g("block"), codeblock.text)
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parsed = (parsed ~= nil and inspect(parsed) or parsed)
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return codeblock, lit.status
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end
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function lit.getinsert(code)
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return code, lit.status
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end
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return lit
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