-- config.tlu: configuration handling for texdoc -- -- Manuel Pégourié-Gonnard and the TeX Live team, GPLv3, -- see texdoclib.tlu for details -------------------------- hide the config table -------------------------- -- config is read-only (but not "deep" read-only) function set_read_only(table, name) assert(next(table) == nil, 'Internal error: '..name..' should be empty at this point.') local ro = 'Internal error: attempt to update read-only table ' local real = {} setmetatable(table, { __index = real, __newindex = function () error(ro..name..'.') end, }) return function(k, v) real[k] = v end end real_set_config = set_read_only(config, 'config') ------------------------- general config functions ------------------------ -- set a config parameter, but don't overwrite it if already set -- three special types: *_list (list), *_switch (boolean), *_level (number) function set_config_element (key, value, context) local is_known = false -- is key a valid option? local option for _, option in ipairs(C.known_options) do if string.match(key, '^'..option..'$') then is_known = true break end end -- warn and exit if key is not a known option if not is_known then config_warn(key, nil, context, true) return end -- exit if key is already set (/!\ must test for nil, not false) if not (config[key] == nil) then if context.src ~= 'def' then deb_print('config', "Ignoring '"..key.."="..value.."' " ..context_to_string(context)..'.') end return nil end -- record the source of the setting real_set_config(key..'_src', context.src) -- detect the type of the key if string.match(key, '_list$') then -- coma-separated list local values if value == '' then values = {} else values = string.explode(value, ',') end local inverse = {} for i, j in ipairs(values) do -- sanitize values... j = string.gsub(j, '%s*$', '') j = string.gsub(j, '^%s*', '') values[i] = j inverse[j] = i -- ... and build inverse mapping on the way end real_set_config(key, values) real_set_config(key..'_inv', inverse) real_set_config(key..'_max', #values) elseif string.find (key, '_switch$') then -- boolean if value == 'true' then real_set_config(key, true) elseif value == 'false' then real_set_config(key, false) else config_warn (key, value, context) end elseif string.find (key, '_level$') then -- integer local val = tonumber (value) if val then real_set_config(key, val) else config_warn (key, value, context) end else -- string real_set_config(key, value) end -- special case: if we just set debug_list, print version info now if key == 'debug_list' then deb_print('version', C.fullname..' version '..C.version) end -- now tell what we have just done, for debugging deb_print('config', "Setting '"..key.."="..value.."' "..context_to_string(context)..'.') end -- a helper function for warning messages in the above function config_warn (key, value, context, unknown) local begin = unknown and 'Unknown option "'..key..'"' or 'Illegal value "'..tostring(value)..'" for option "'..key..'"' local ending = '. Skipping.' err_print('warning', begin..' '..context_to_string(context)..ending) end -- interpreting 'context' for the previous functions function context_to_string(context) if not context then return '(no context)' end if context.src == 'cl' then return 'from command line option "'..context.name..'"' elseif context.src == 'env' then return 'from environment variable "'..context.name..'"' elseif context.src == 'loc' then return 'from operating system locale' elseif context.src == 'file' then return 'in file "'..context.file..'" on line '..context.line elseif context.src == 'def' then return 'from built-in defaults' else return 'from unkown source (should not happen, please report)' end end -- set a whole list, also whithout overwriting function set_config_list (conf, context) for key, value in pairs(conf) do set_config_element (key, value, context) end end ------------------------ options from command line ------------------------ -- set config from the command line -- Please make sure to update C.usage_msg accordingly -- and set a default value in setup_config_from_defaults() if relevant. function setup_config_from_cl(arg) local curr_arg local action = true local function set_config_elt(key, val) set_config_element(key, val, {src='cl', name=curr_arg}) end -- modified Alternative Get Opt -- cf. http://lua-users.org/wiki/AlternativeGetOpt local function getopt(arg, options) local tmp local tab = {} local saved_arg = { table.unpack(arg) } for k, v in ipairs(saved_arg) do if string.sub(v, 1, 2) == "--" then table.remove(arg, 1) 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 table.remove(arg, 1) 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 tmp = string.sub(v, y+1) y = l else table.remove(arg, 1) tmp = saved_arg[k + 1] end if string.match(tmp, '^%-') then tab[jopt] = false else tab[jopt] = tmp end else tab[jopt] = true end y = y + 1 end end end return tab end opts = getopt(arg, 'd') for k, v in pairs(opts) do if #k == 1 then curr_arg = '-' .. k else curr_arg = '--' .. k end -- action if (curr_arg == '-h') or (curr_arg == '--help') then action = 'help' elseif (curr_arg == '-V') or (curr_arg == '--version') then action = 'version' elseif (curr_arg == '-f') or (curr_arg == '--files') then action = 'files' elseif curr_arg == '--just-view' then action = 'view' -- mode elseif (curr_arg == '-w') or (curr_arg == '--view') then set_config_elt('mode', 'view') elseif (curr_arg == '-m') or (curr_arg == '--mixed') then set_config_elt('mode', 'mixed') elseif (curr_arg == '-l') or (curr_arg == '--list') then set_config_elt('mode', 'list') elseif (curr_arg == '-s') or (curr_arg == '--showall') then set_config_elt ('mode', 'showall') -- interaction elseif (curr_arg == '-I') or (curr_arg == '--nointeract') then set_config_elt('interact_switch', 'false') elseif (curr_arg == '-i') or (curr_arg == '--interact') then set_config_elt('interact_switch', 'true') -- output format elseif (curr_arg == '-M') or (curr_arg == '--machine') then set_config_elt('machine_switch', 'true') -- debug elseif (curr_arg == '-d') or (curr_arg == '--debug') then if v == true then v = 'all' end set_config_elt('debug_list', v) elseif curr_arg == '-D' then set_config_elt('debug_list', 'all') -- verbosity elseif (curr_arg == '-q') or (curr_arg == '--quiet') then set_config_elt('verbosity_level', C.min_verbosity) elseif (curr_arg == '-v') or (curr_arg == '--verbose') then set_config_elt('verbosity_level', C.max_verbosity) -- problem else err_print('error', "unknown option: "..curr_arg) err_print('error', C.error_msg) return false end end return action end ------------------------- config from environment -------------------------- -- set config from environment if available function setup_config_from_env () local function set_config_elt_from_vars(key, vars) for _, var in ipairs(vars) do local value = os.getenv(var) if value then set_config_element(key, value, {src='env', name=var}) end end end set_config_elt_from_vars('viewer_pdf', {"PDFVIEWER_texdoc", "PDFVIEWER", "TEXDOCVIEW_pdf", "TEXDOC_VIEWER_PDF"}) set_config_elt_from_vars('viewer_ps', {"PSVIEWER_texdoc", "PSVIEWER", "TEXDOCVIEW_ps", "TEXDOC_VIEWER_PS"}) set_config_elt_from_vars('viewer_dvi', {"DVIVIEWER_texdoc", "DVIVIEWER", "TEXDOCVIEW_dvi", "TEXDOC_VIEWER_DVI"}) set_config_elt_from_vars('viewer_html', {"BROWSER_texdoc", "BROWSER", "TEXDOCVIEW_html", "TEXDOC_VIEWER_HTML"}) set_config_elt_from_vars('viewer_md', {"MDVIEWER_texdoc", "PAGER", "TEXDOCVIEW_md", "TEXDOC_VIEWER_MD"}) set_config_elt_from_vars('viewer_txt', {"PAGER_texdoc", "PAGER", "TEXDOCVIEW_txt", "TEXDOC_VIEWER_TXT"}) end ---------------------- options and aliases from files ---------------------- -- set config+aliases from a particular config file assumed to exist function read_config_file(configfile) local cnf = assert(io.open(configfile, 'r')) local lineno = 0 while true do local line=cnf:read('*line') lineno = lineno + 1 if line == nil then break end -- EOF line = string.gsub(line, '%s*#.*$', '') -- comments begin with # line = string.gsub(line, '%s*$', '') -- remove trailing spaces line = string.gsub(line, '^%s*', '') -- remove leading spaces -- try to interpret the line local ok = string.match(line, '^%s*$') or confline_to_alias(line, configfile, lineno) or confline_to_score(line, configfile, lineno) or confline_to_config(line, configfile, lineno) -- complain if it failed if not ok then err_print('warning', 'syntax error in '..configfile..' at line '..lineno..'.') end end cnf:close() end -- interpret a confline as a config setting or return false function confline_to_config(line, file, pos) local key, val = string.match(line, '^([%a%d_]+)%s*=%s*(.+)') if key and val then set_config_element(key, val, {src='file', file=file, line=pos}) return true end return false end -- return the list of configuration files function get_config_files() -- get names local platform = string.match (kpse.var_value ('SELFAUTOLOC'), '.*/(.*)$') local names = { 'texdoc-'..platform..'.cnf', 'texdoc.cnf', 'texdoc-dist.cnf', } -- get dirs local sep = (os.type == 'windows') and ';' or ':' local texmf_texdoc = kpse.expand_path('$TEXMF/texdoc') local dirs = texmf_texdoc:explode(sep) -- merge them local ret = {} for _, dir in ipairs(dirs) do for _, name in ipairs(names) do local pathname = dir .. '/' .. name if lfs.isfile(pathname) then table.insert(ret, pathname) end end end return ret end -- the config_files table is shared by the next two functions do local config_files = {} -- set config/aliases from all config files function setup_config_from_files () local file_list = get_config_files() for i, file in ipairs (file_list) do local status = config.lastfile_switch and 'disabled' or 'active' config_files[i] = { path = file, status = status, } if status == 'active' then read_config_file (file) end end end -- now a special information function (see -f,--file option) function show_config_files (print_fun, verbose) local pref = verbose and ' ' or '' print_fun("Configuration files are:") for i, file in ipairs (config_files) do print_fun(pref..file.status..'\t'..w32_path(file.path)) end if verbose then print_fun('Recommended file(s) for personal settings:') local sep = (os.type == 'windows') and ';' or ':' local texmfhomes = string.explode(kpse.var_value('TEXMFHOME'), sep) for _, home in ipairs(texmfhomes) do print_fun(pref..home..'/texdoc/texdoc.cnf') end end end end -- scope of config_files ---------------------- config from locale settings ------------------------- function setup_config_from_locale() local current = os.setlocale(nil, "all") os.setlocale("", "all") local native = os.setlocale(nil, "time") os.setlocale(current, "all") local lang = string.match(native, "^[a-z][a-z]") if lang then set_config_element("lang", lang, {src="loc"}) end end ---------------------- options from built-in defaults ---------------------- -- for default viewer on general Unix, we have a list; the following two -- functions are used to check in the path which program is available -- check if "name" is the name of a file in the path -- Warning: to be used only on Unix! (separators, and PATH irrelevant on win32) -- the value of PATH is cached do local path_list = string.explode(os.getenv("PATH"), ':') function is_in_path(name) for _, path in ipairs(path_list) do if lfs.isfile(path..'/'..name) then return true end end return false end end -- guess a viewer from a list: -- - xdg-open from freedesktop if available -- - try detecting desktop environments -- - or return the first element of "list" whose name is found in path -- - or nil -- caches results of desktop environment detection do local de_viewer function guess_viewer(cmds) -- try the freedesktop method if is_in_path('xdg-open') then return '(xdg-open %s) &' end -- try desktop environment if not de_viewer then de_viewer = desktop_environment_viewer() end if de_viewer then return de_viewer end -- or look along path for _, cmd in ipairs(cmds) do if is_in_path(cmd[1]) then return cmd[2] end end end end -- returns a viewer specific to a desktop environement if relevant -- doesn't work on windows (uses io.popen) -- logic stolen from xdg-open (http://www.freedesktop.org/) and adapted function desktop_environment_viewer() if os.getenv('KDE_SESSION_VERSION') and is_in_path('kde-open') then return '(kde-open %s) &' -- kde 4 (or greater) end if os.getenv('KDE_FULL_SESSION') and is_in_path('kfmclient') then return '(kfmclient exec %s) &' -- kde < 4 end if os.getenv('GNOME_DESKTOP_SESSION_ID') then -- gnome if is_in_path('gvfs-open') then return '(gvfs-open %s) &' end if is_in_path('gnome-open') then return '(gnome-open %s) &' end end if not is_in_path('xprop') then return end local xprop_fh = io.popen('xprop -root _DT_SAVE_MODE 2>/dev/null') local xprop_out = xprop_fh:read('*line') xprop_fh:close() if xprop_out and string.find(xprop_out, '= "xfce4"$') then -- xfce return '(exo-open %s) &' end end -- set viewers from defaults (done only if necessary) function get_default_viewers() local function set_config_ls(ls) set_config_list(ls, {src='def'}) end if (os.type == "windows") then set_config_ls { -- Use 'start' to get file associations. -- We need to quote the filenames, but the first quoted argument -- is considered as the title by start, so we provide a dummy title. -- Also, since the command line parser removes quotes if there -- is no space inside, the dummy title must contain spaces. viewer_dvi = 'start "texdoc dvi viewer"', viewer_html = 'start "texdoc html viewer"', viewer_pdf = 'start "texdoc pdf viewer"', viewer_ps = 'start "texdoc ps viewer"', -- 'more' is always available. -- However, we can't assume texdoc is called from a cmd.exe window -- (it can be run from the start->run menu), hence we make sure -- to open a new window if needed. viewer_txt = 'start cmd /k more', viewer_md = viewer_txt, } elseif (os.name == 'macosx') then set_config_ls { viewer_dvi = 'open', viewer_html = 'open', viewer_pdf = 'open', viewer_ps = 'open', viewer_txt = 'less', viewer_md = viewer_txt, } else -- generic Unix set_config_ls { viewer_dvi = guess_viewer { {'xdvi', '(xdvi %s) &'}, {'evince', '(evince %s) &'}, {'okular', '(okular %s) &'}, {'kdvi', '(kdvi %s) &'}, {'xgdvi', '(xgdvi %s) &'}, {'spawg', '(spawg %s) &'}, {'spawx11', '(spawx11 %s) &'}, {'tkdvi', '(tkdvi %s) &'}, {'dvilx', '(dvilx %s) &'}, {'advi', '(advi %s) &'}, {'xdvik-ja', '(xdvik-ja %s) &'}, {'see', '(see %s) &'} }, viewer_html = guess_viewer { {'firefox', '(firefox %s) &'}, {'seamonkey', '(seamonkey %s) &'}, {'mozilla', '(mozilla %s) &'}, {'konqueror', '(konqueror %s) &'}, {'epiphany', '(epiphany %s) &'}, {'opera', '(opera %s) &'}, {'w3m', 'w3m'}, {'links', 'links'}, {'lynx', 'lynx'}, {'see', 'see'} }, viewer_pdf = guess_viewer { {'xpdf', '(xpdf %s) &'}, {'evince', '(evince %s) &'}, {'okular', '(okular %s) &'}, {'kpdf', '(kpdf %s) &'}, {'acroread', '(xpdf %s) &'}, {'see', '(see %s) &'} }, viewer_ps = guess_viewer { {'gv', '(gv %s) &'}, {'evince', '(evince %s) &'}, {'okular', '(okular %s) &'}, {'kghostview', '(kghostview %s) &'}, {'see', '(see %s) &'} }, viewer_txt = guess_viewer { {'most', 'most'}, {'less', 'less'}, {'more', 'more'} }, viewer_md = viewer_txt, } end end -- set some fall-back default values if no previous value is set function setup_config_from_defaults() local function set_config_ls(ls) set_config_list(ls, {src='def'}) end local function set_config_elt(key, val) set_config_element(key, val, {src='def'}) end -- various, platform independent, stuff set_config_ls { mode = 'view', interact_switch = 'true', machine_switch = 'false', ext_list = 'pdf, htm, html, txt, ps, dvi, ', basename_list = 'readme, 00readme', badext_list = 'txt, ', badbasename_list = 'readme, 00readme', suffix_list = '', verbosity_level = C.def_verbosity, debug_list = '', max_lines = '20', fuzzy_level = '5', } -- zip-related options set_config_ls { zipext_list = '', rm_file = 'rm -f', rm_dir = 'rmdir', } end -------------------------- set all configuration --------------------------- -- populate the config and alias arrays function setup_config_and_alias(arg) -- setup config from all sources local ret = setup_config_from_cl(arg) setup_config_from_env() setup_config_from_files() setup_config_from_locale() setup_config_from_defaults() -- machine mode implies no interaction if config.machine_switch == true then real_set_config('interact_switch', false) end -- debug implies verbose if #config.debug_list > 0 then real_set_config('verbosity_level', tonumber(C.max_verbosity)) end -- we were waiting for config.debug_list to be known to do this show_config_files(function(s) deb_print('files', s) end) -- propagated return value of _from_cl() return ret end return { setup_config_and_alias = setup_config_and_alias, get_default_viewers = get_default_viewers, show_config_files = show_config_files, read_config_file = read_config_file, } -- vim: ft=lua: