720 lines
24 KiB
Lua
720 lines
24 KiB
Lua
-- The help text database and query interface.
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--
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-- Help text is read from the rendered text in hack/docs/docs/. If no rendered
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-- text exists, it is read from the script sources (for scripts) or the string
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-- passed to the PluginCommand initializer (for plugins).
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--
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-- For plugins that don't register a command with the same name as the plugin,
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-- the plugin name is registered as a separate entry so documentation on what
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-- happens when you enable the plugin can be found.
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--
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-- The database is lazy-loaded when an API method is called. It rechecks its
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-- help sources for updates if an API method has not been called in the last
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-- 60 seconds.
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local _ENV = mkmodule('helpdb')
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-- paths
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local RENDERED_PATH = 'hack/docs/docs/tools/'
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local TAG_DEFINITIONS = 'hack/docs/docs/Tags.txt'
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-- used when reading help text embedded in script sources
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local SCRIPT_DOC_BEGIN = '[====['
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local SCRIPT_DOC_END = ']====]'
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local SCRIPT_DOC_BEGIN_RUBY = '=begin'
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local SCRIPT_DOC_END_RUBY = '=end'
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-- enums
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local ENTRY_TYPES = {
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BUILTIN='builtin',
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PLUGIN='plugin',
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COMMAND='command'
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}
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local HELP_SOURCES = {
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RENDERED='rendered', -- from the installed, rendered help text
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PLUGIN='plugin', -- from the plugin source code
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SCRIPT='script', -- from the script source code
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STUB='stub', -- from a generated stub
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}
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-- builtin command names, with aliases mapped to their canonical form
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local BUILTINS = {
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['?']='help',
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alias=true,
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clear='cls',
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cls=true,
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['devel/dump-rpc']=true,
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die=true,
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dir='ls',
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disable=true,
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enable=true,
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fpause=true,
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help=true,
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hide=true,
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keybinding=true,
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['kill-lua']=true,
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['load']=true,
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ls=true,
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man='help',
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plug=true,
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reload=true,
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script=true,
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['sc-script']=true,
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show=true,
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tags=true,
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['type']=true,
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unload=true,
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}
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---------------------------------------------------------------------------
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-- data structures
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---------------------------------------------------------------------------
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-- help text database, keys are a subset of the entry database
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-- entry name -> {
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-- help_source (element of HELP_SOURCES),
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-- short_help (string),
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-- long_help (string),
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-- tags (set),
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-- source_timestamp (mtime, 0 for non-files),
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-- source_path (string, nil for non-files)
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-- }
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textdb = textdb or {}
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-- entry database, points to text in textdb
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-- entry name -> {
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-- entry_types (set of ENTRY_TYPES),
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-- short_help (string, if not nil then overrides short_help in text_entry),
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-- text_entry (string)
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-- }
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--
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-- entry_types is a set because plugin commands can also be the plugin names.
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entrydb = entrydb or {}
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-- tag name -> list of entry names
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-- Tags defined in the TAG_DEFINITIONS file that have no associated db entries
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-- will have an empty list.
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tag_index = tag_index or {}
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---------------------------------------------------------------------------
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-- data ingestion
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---------------------------------------------------------------------------
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local function get_rendered_path(entry_name)
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return RENDERED_PATH .. entry_name .. '.txt'
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end
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local function has_rendered_help(entry_name)
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return dfhack.filesystem.mtime(get_rendered_path(entry_name)) ~= -1
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end
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local DEFAULT_HELP_TEMPLATE = [[
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%s
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%s
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No help available.
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]]
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local function make_default_entry(entry_name, help_source, kwargs)
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local default_long_help = DEFAULT_HELP_TEMPLATE:format(
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entry_name, ('*'):rep(#entry_name))
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return {
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help_source=help_source,
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short_help='No help available.',
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long_help=default_long_help,
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tags={},
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source_timestamp=kwargs.source_timestamp or 0,
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source_path=kwargs.source_path}
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end
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-- updates the short_text, the long_text, and the tags in the given entry based
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-- on the text returned from the iterator.
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-- if defined, opts can have the following fields:
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-- begin_marker (string that marks the beginning of the help text; all text
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-- before this marker is ignored)
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-- end_marker (string that marks the end of the help text; text will stop
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-- being parsed after this marker is seen)
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-- no_header (don't try to find the entity name at the top of the help text)
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-- first_line_is_short_help (if set, then read the short help text from the
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-- first commented line of the script instead of
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-- using the first sentence of the long help text.
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-- value is the comment character.)
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local function update_entry(entry, iterator, opts)
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opts = opts or {}
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local lines = {}
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local first_line_is_short_help = opts.first_line_is_short_help
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local begin_marker_found,header_found = not opts.begin_marker,opts.no_header
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local tags_found, short_help_found = false, opts.skip_short_help
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local in_short_help = false
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for line in iterator do
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if not short_help_found and first_line_is_short_help then
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line = line:trim()
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local _,_,text = line:find('^'..first_line_is_short_help..'%s*(.*)')
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if not text then
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-- if no first-line short help found, fall back to getting the
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-- first sentence of the help text.
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first_line_is_short_help = false
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else
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if not text:endswith('.') then
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text = text .. '.'
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end
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entry.short_help = text
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short_help_found = true
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goto continue
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end
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end
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if not begin_marker_found then
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local _, endpos = line:find(opts.begin_marker, 1, true)
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if endpos == #line then
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begin_marker_found = true
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end
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goto continue
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end
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if opts.end_marker then
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local _, endpos = line:find(opts.end_marker, 1, true)
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if endpos == #line then
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break
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end
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end
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if not header_found and line:find('%w') then
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header_found = true
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elseif not tags_found and line:find('^[*]*Tags:[*]* [%w, ]+$') then
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local _,_,tags = line:trim():find('[*]*Tags:[*]* *(.*)')
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entry.tags = {}
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for _,tag in ipairs(tags:split('[ ,]+')) do
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entry.tags[tag] = true
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end
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tags_found = true
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elseif not short_help_found and
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not line:find('^[*]*Keybinding:') and
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line:find('%w') then
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if in_short_help then
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entry.short_help = entry.short_help .. ' ' .. line
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else
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entry.short_help = line
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end
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local sentence_end = entry.short_help:find('.', 1, true)
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if sentence_end then
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entry.short_help = entry.short_help:sub(1, sentence_end)
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short_help_found = true
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else
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in_short_help = true
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end
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end
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table.insert(lines, line)
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::continue::
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end
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if #lines > 0 then
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entry.long_help = table.concat(lines, '\n')
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end
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end
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-- create db entry based on parsing sphinx-rendered help text
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local function make_rendered_entry(old_entry, entry_name, kwargs)
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local source_path = get_rendered_path(entry_name)
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local source_timestamp = dfhack.filesystem.mtime(source_path)
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if old_entry and old_entry.help_source == HELP_SOURCES.RENDERED and
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old_entry.source_timestamp >= source_timestamp then
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-- we already have the latest info
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return old_entry
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end
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kwargs.source_path, kwargs.source_timestamp = source_path, source_timestamp
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local entry = make_default_entry(entry_name, HELP_SOURCES.RENDERED, kwargs)
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update_entry(entry, io.lines(source_path))
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return entry
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end
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-- create db entry based on the help text in the plugin source (used by
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-- out-of-tree plugins)
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local function make_plugin_entry(old_entry, entry_name, kwargs)
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if old_entry and old_entry.source == HELP_SOURCES.PLUGIN then
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-- we can't tell when a plugin is reloaded, so we can either choose to
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-- always refresh or never refresh. let's go with never for now for
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-- performance.
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return old_entry
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end
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local entry = make_default_entry(entry_name, HELP_SOURCES.PLUGIN, kwargs)
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local long_help = dfhack.internal.getCommandHelp(entry_name)
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if long_help and #long_help:trim() > 0 then
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update_entry(entry, long_help:trim():gmatch('[^\n]*'), {no_header=true})
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end
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return entry
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end
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-- create db entry based on the help text in the script source (used by
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-- out-of-tree scripts)
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local function make_script_entry(old_entry, entry_name, kwargs)
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local source_path = kwargs.source_path
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local source_timestamp = dfhack.filesystem.mtime(source_path)
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if old_entry and old_entry.source == HELP_SOURCES.SCRIPT and
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old_entry.source_path == source_path and
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old_entry.source_timestamp >= source_timestamp then
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-- we already have the latest info
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return old_entry
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end
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kwargs.source_timestamp, kwargs.entry_type = source_timestamp
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local entry = make_default_entry(entry_name, HELP_SOURCES.SCRIPT, kwargs)
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local ok, lines = pcall(io.lines, source_path)
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if not ok then
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return entry
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end
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local is_rb = source_path:endswith('.rb')
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update_entry(entry, lines,
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{begin_marker=(is_rb and SCRIPT_DOC_BEGIN_RUBY or SCRIPT_DOC_BEGIN),
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end_marker=(is_rb and SCRIPT_DOC_BEGIN_RUBY or SCRIPT_DOC_END),
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first_line_is_short_help=(is_rb and '#' or '%-%-')})
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return entry
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end
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-- updates the dbs (and associated tag index) with a new entry if the entry_name
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-- doesn't already exist in the dbs.
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local function update_db(old_db, entry_name, text_entry, help_source, kwargs)
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if entrydb[entry_name] then
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-- already in db (e.g. from a higher-priority script dir); skip
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return
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end
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entrydb[entry_name] = {
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entry_types=kwargs.entry_types,
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short_help=kwargs.short_help,
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text_entry=text_entry
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}
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if entry_name ~= text_entry then
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return
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end
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local text_entry, old_entry = nil, old_db[entry_name]
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if help_source == HELP_SOURCES.RENDERED then
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text_entry = make_rendered_entry(old_entry, entry_name, kwargs)
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elseif help_source == HELP_SOURCES.PLUGIN then
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text_entry = make_plugin_entry(old_entry, entry_name, kwargs)
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elseif help_source == HELP_SOURCES.SCRIPT then
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text_entry = make_script_entry(old_entry, entry_name, kwargs)
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elseif help_source == HELP_SOURCES.STUB then
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text_entry = make_default_entry(entry_name, HELP_SOURCES.STUB, kwargs)
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else
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error('unhandled help source: ' .. help_source)
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end
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textdb[entry_name] = text_entry
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end
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-- add the builtin commands to the db
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local function scan_builtins(old_db)
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local entry_types = {[ENTRY_TYPES.BUILTIN]=true, [ENTRY_TYPES.COMMAND]=true}
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for builtin,canonical in pairs(BUILTINS) do
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if canonical == true then canonical = builtin end
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update_db(old_db, builtin, canonical,
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has_rendered_help(canonical) and
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HELP_SOURCES.RENDERED or HELP_SOURCES.STUB,
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{entry_types=entry_types})
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end
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end
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-- scan for enableable plugins and plugin-provided commands and add their help
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-- to the db
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local function scan_plugins(old_db)
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local plugin_names = dfhack.internal.listPlugins()
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for _,plugin in ipairs(plugin_names) do
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local commands = dfhack.internal.listCommands(plugin)
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local includes_plugin = false
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for _,command in ipairs(commands) do
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local kwargs = {entry_types={[ENTRY_TYPES.COMMAND]=true}}
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if command == plugin then
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kwargs.entry_types[ENTRY_TYPES.PLUGIN]=true
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includes_plugin = true
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end
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kwargs.short_help = dfhack.internal.getCommandDescription(command)
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update_db(old_db, command, plugin,
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has_rendered_help(plugin) and
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HELP_SOURCES.RENDERED or HELP_SOURCES.PLUGIN,
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kwargs)
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end
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if not includes_plugin then
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update_db(old_db, plugin, plugin,
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has_rendered_help(plugin) and
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HELP_SOURCES.RENDERED or HELP_SOURCES.STUB,
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{entry_types={[ENTRY_TYPES.PLUGIN]=true}})
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end
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end
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end
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-- scan for scripts and add their help to the db
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local function scan_scripts(old_db)
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local entry_types = {[ENTRY_TYPES.COMMAND]=true}
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for _,script_path in ipairs(dfhack.internal.getScriptPaths()) do
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local files = dfhack.filesystem.listdir_recursive(
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script_path, nil, false)
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if not files then goto skip_path end
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for _,f in ipairs(files) do
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if f.isdir or
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(not f.path:endswith('.lua') and not f.path:endswith('.rb')) or
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f.path:startswith('test/') or
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f.path:startswith('internal/') then
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goto continue
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end
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local dot_index = f.path:find('%.[^.]*$')
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local entry_name = f.path:sub(1, dot_index - 1)
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local source_path = script_path .. '/' .. f.path
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update_db(old_db, entry_name, entry_name,
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has_rendered_help(entry_name) and
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HELP_SOURCES.RENDERED or HELP_SOURCES.SCRIPT,
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{entry_types=entry_types, source_path=source_path})
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::continue::
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end
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::skip_path::
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end
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end
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-- read tags and descriptions from the TAG_DEFINITIONS file and add them all
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-- to tag_index, initizlizing each entry with an empty list.
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local function initialize_tags()
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local tag, desc, in_desc = nil, nil, false
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local ok, lines = pcall(io.lines, TAG_DEFINITIONS)
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if not ok then return end
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for line in lines do
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if in_desc then
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line = line:trim()
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if #line == 0 then
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in_desc = false
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goto continue
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end
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desc = desc .. ' ' .. line
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tag_index[tag].description = desc
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else
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_,_,tag,desc = line:find('^%* (%w+): (.+)')
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if not tag then goto continue end
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tag_index[tag] = {description=desc}
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in_desc = true
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end
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::continue::
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end
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end
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local function index_tags()
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for entry_name,entry in pairs(entrydb) do
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for tag in pairs(textdb[entry.text_entry].tags) do
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-- ignore unknown tags
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if tag_index[tag] then
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table.insert(tag_index[tag], entry_name)
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end
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end
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end
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end
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-- ensures the db is up to date by scanning all help sources. does not do
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-- anything if it has already been run within the last 60 seconds.
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last_refresh_ms = last_refresh_ms or 0
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local function ensure_db()
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local now_ms = dfhack.getTickCount()
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if now_ms - last_refresh_ms < 60000 then return end
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last_refresh_ms = now_ms
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local old_db = textdb
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textdb, entrydb, tag_index = {}, {}, {}
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initialize_tags()
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scan_builtins(old_db)
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scan_plugins(old_db)
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scan_scripts(old_db)
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index_tags()
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end
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---------------------------------------------------------------------------
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-- get API
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---------------------------------------------------------------------------
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-- converts strings into single-element lists containing that string
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local function normalize_string_list(l)
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if not l or #l == 0 then return nil end
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if type(l) == 'string' then
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return {l}
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end
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return l
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end
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local function has_keys(str, dict)
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if not str or #str == 0 then
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return false
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end
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ensure_db()
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for _,s in ipairs(normalize_string_list(str)) do
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if not dict[s] then
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return false
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end
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end
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return true
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end
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-- returns whether the given string (or list of strings) is an entry in the db
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function is_entry(str)
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return has_keys(str, entrydb)
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end
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local function get_db_property(entry_name, property)
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ensure_db()
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if not entrydb[entry_name] then
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error(('helpdb entry not found: "%s"'):format(entry_name))
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end
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return entrydb[entry_name][property] or
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textdb[entrydb[entry_name].text_entry][property]
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end
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-- returns the ~54 char summary blurb associated with the entry
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function get_entry_short_help(entry)
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return get_db_property(entry, 'short_help')
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end
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-- returns the full help documentation associated with the entry
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function get_entry_long_help(entry)
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return get_db_property(entry, 'long_help')
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end
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local function set_to_sorted_list(set)
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local list = {}
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for item in pairs(set) do
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table.insert(list, item)
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end
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table.sort(list)
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return list
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end
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-- returns the list of tags associated with the entry, in alphabetical order
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function get_entry_tags(entry)
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return set_to_sorted_list(get_db_property(entry, 'tags'))
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end
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-- returns whether the given string (or list of strings) matches a tag name
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function is_tag(str)
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return has_keys(str, tag_index)
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end
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-- returns the defined tags in alphabetical order
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function get_tags()
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ensure_db()
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return set_to_sorted_list(tag_index)
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end
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function get_tag_data(tag)
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ensure_db()
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if not tag_index[tag] then
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dfhack.printerr('invalid tag: ' .. tag)
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return {}
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end
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return tag_index[tag]
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end
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---------------------------------------------------------------------------
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-- search API
|
|
---------------------------------------------------------------------------
|
|
|
|
-- returns a list of path elements in reverse order
|
|
local function chunk_for_sorting(str)
|
|
local parts = str:split('/')
|
|
local chunks = {}
|
|
for i=1,#parts do
|
|
chunks[#parts - i + 1] = parts[i]
|
|
end
|
|
return chunks
|
|
end
|
|
|
|
-- sorts by last path component, then by parent path components.
|
|
-- something comes before nothing.
|
|
-- e.g. gui/autofarm comes immediately before autofarm
|
|
local function sort_by_basename(a, b)
|
|
local a = chunk_for_sorting(a)
|
|
local b = chunk_for_sorting(b)
|
|
local i = 1
|
|
while a[i] do
|
|
if not b[i] then
|
|
return true
|
|
end
|
|
if a[i] ~= b[i] then
|
|
return a[i] < b[i]
|
|
end
|
|
i = i + 1
|
|
end
|
|
return false
|
|
end
|
|
|
|
local function matches(entry_name, filter)
|
|
if filter.tag then
|
|
local matched = false
|
|
local tags = get_db_property(entry_name, 'tags')
|
|
for _,tag in ipairs(filter.tag) do
|
|
if tags[tag] then
|
|
matched = true
|
|
break
|
|
end
|
|
end
|
|
if not matched then
|
|
return false
|
|
end
|
|
end
|
|
if filter.types then
|
|
local matched = false
|
|
local etypes = get_db_property(entry_name, 'entry_types')
|
|
for _,etype in ipairs(filter.types) do
|
|
if etypes[etype] then
|
|
matched = true
|
|
break
|
|
end
|
|
end
|
|
if not matched then
|
|
return false
|
|
end
|
|
end
|
|
if filter.str then
|
|
local matched = false
|
|
for _,str in ipairs(filter.str) do
|
|
if entry_name:find(str, 1, true) then
|
|
matched = true
|
|
break
|
|
end
|
|
end
|
|
if not matched then
|
|
return false
|
|
end
|
|
end
|
|
return true
|
|
end
|
|
|
|
-- normalizes the lists in the filter and returns nil if no filter elements are
|
|
-- populated
|
|
local function normalize_filter(f)
|
|
if not f then return nil end
|
|
local filter = {}
|
|
filter.str = normalize_string_list(f.str)
|
|
filter.tag = normalize_string_list(f.tag)
|
|
filter.types = normalize_string_list(f.types)
|
|
if not filter.str and not filter.tag and not filter.types then
|
|
return nil
|
|
end
|
|
return filter
|
|
end
|
|
|
|
-- returns a list of entry names, alphabetized by their last path component,
|
|
-- with populated path components coming before null path components (e.g.
|
|
-- autobutcher will immediately follow gui/autobutcher).
|
|
-- the optional include and exclude filter params are maps with the following
|
|
-- elements:
|
|
-- str - if a string, filters by the given substring. if a table of strings,
|
|
-- includes entry names that match any of the given substrings.
|
|
-- tag - if a string, filters by the given tag name. if a table of strings,
|
|
-- includes entries that match any of the given tags.
|
|
-- types - if a string, matches entries of the given type. if a table of
|
|
-- strings, includes entries that match any of the given types. valid
|
|
-- types are: "builtin", "plugin", "command". note that many plugin
|
|
-- commands have the same name as the plugin, so those entries will
|
|
-- match both "plugin" and "command" types.
|
|
function search_entries(include, exclude)
|
|
ensure_db()
|
|
include = normalize_filter(include)
|
|
exclude = normalize_filter(exclude)
|
|
local entries = {}
|
|
for entry in pairs(entrydb) do
|
|
if (not include or matches(entry, include)) and
|
|
(not exclude or not matches(entry, exclude)) then
|
|
table.insert(entries, entry)
|
|
end
|
|
end
|
|
table.sort(entries, sort_by_basename)
|
|
return entries
|
|
end
|
|
|
|
-- returns a list of all commands. used by Core's autocomplete functionality.
|
|
function get_commands()
|
|
local include = {types={ENTRY_TYPES.COMMAND}}
|
|
return search_entries(include)
|
|
end
|
|
|
|
function is_builtin(command)
|
|
ensure_db()
|
|
return entrydb[command] and
|
|
get_db_property(command, 'entry_types')[ENTRY_TYPES.BUILTIN]
|
|
end
|
|
|
|
---------------------------------------------------------------------------
|
|
-- print API (outputs to console)
|
|
---------------------------------------------------------------------------
|
|
|
|
-- implements the 'help' builtin command
|
|
function help(entry)
|
|
ensure_db()
|
|
if not entrydb[entry] then
|
|
dfhack.printerr(('No help entry found for "%s"'):format(entry))
|
|
return
|
|
end
|
|
print(get_entry_long_help(entry))
|
|
end
|
|
|
|
-- prints col1text (width 21), a one space gap, and col2 (width 58)
|
|
-- if col1text is longer than 21 characters, col2text is printed starting on the
|
|
-- next line. if col2text is longer than 58 characters, it is wrapped. col2text
|
|
-- lines on lines below the col1text output are indented by one space further
|
|
-- than the col2text on the first line.
|
|
local COL1WIDTH, COL2WIDTH = 20, 58
|
|
local function print_columns(col1text, col2text)
|
|
col2text = col2text:wrap(COL2WIDTH)
|
|
local wrapped_col2 = {}
|
|
for line in col2text:gmatch('[^'..NEWLINE..']*') do
|
|
table.insert(wrapped_col2, line)
|
|
end
|
|
local col2_start_line = 1
|
|
if #col1text > COL1WIDTH then
|
|
print(col1text)
|
|
else
|
|
print(('%-'..COL1WIDTH..'s %s'):format(col1text, wrapped_col2[1]))
|
|
col2_start_line = 2
|
|
end
|
|
for i=col2_start_line,#wrapped_col2 do
|
|
print(('%'..COL1WIDTH..'s %s'):format(' ', wrapped_col2[i]))
|
|
end
|
|
end
|
|
|
|
-- implements the 'tags' builtin command
|
|
function tags()
|
|
local tags = get_tags()
|
|
for _,tag in ipairs(tags) do
|
|
print_columns(tag, get_tag_data(tag).description)
|
|
end
|
|
end
|
|
|
|
-- prints the requested entries to the console. include and exclude filters are
|
|
-- defined as in search_entries() above.
|
|
function list_entries(skip_tags, include, exclude)
|
|
local entries = search_entries(include, exclude)
|
|
for _,entry in ipairs(entries) do
|
|
print_columns(entry, get_entry_short_help(entry))
|
|
if not skip_tags then
|
|
local tags = get_entry_tags(entry)
|
|
if #tags > 0 then
|
|
print((' tags: %s'):format(table.concat(tags, ', ')))
|
|
end
|
|
end
|
|
end
|
|
if #entries == 0 then
|
|
print('No matches.')
|
|
end
|
|
end
|
|
|
|
-- wraps the list_entries() API to provide a more convenient interface for Core
|
|
-- to implement the 'ls' builtin command.
|
|
-- filter_str - if a tag name, will filter by that tag. otherwise, will filter
|
|
-- as a substring
|
|
-- skip_tags - whether to skip printing tag info
|
|
-- show_dev_commands - if true, will include scripts in the modtools/ and
|
|
-- devel/ directories. otherwise those scripts will be
|
|
-- excluded
|
|
function ls(filter_str, skip_tags, show_dev_commands)
|
|
local include = {types={ENTRY_TYPES.COMMAND}}
|
|
if is_tag(filter_str) then
|
|
include.tag = filter_str
|
|
else
|
|
include.str = filter_str
|
|
end
|
|
list_entries(skip_tags, include,
|
|
show_dev_commands and {} or {str={'modtools/', 'devel/'}})
|
|
end
|
|
|
|
return _ENV
|