]]--
+
+--- UVL - UCI Validation Layer
+-- @class module
+-- @cstyle instance
+
module( "luci.uvl", package.seeall )
require("luci.fs")
require("luci.model.uci")
require("luci.uvl.loghelper")
require("luci.uvl.datatypes")
---require("luci.uvl.validation")
+require("luci.uvl.validation")
require("luci.uvl.dependencies")
+
TYPE_SECTION = 0x01
TYPE_VARIABLE = 0x02
TYPE_ENUM = 0x03
-STRICT_UNKNOWN_SECTIONS = true
-STRICT_UNKNOWN_OPTIONS = true
+--- Boolean; default true;
+-- treat sections found in config but not in scheme as error
+STRICT_UNKNOWN_SECTIONS = true
+
+--- Boolean; default true;
+-- treat options found in config but not in scheme as error
+STRICT_UNKNOWN_OPTIONS = true
+--- Boolean; default true;
+-- treat failed external validators as error
+STRICT_EXTERNAL_VALIDATORS = true
-local default_schemedir = "/etc/scheme"
+--- Boolean; default true;
+-- treat list values stored as options like errors
+STRICT_LIST_TYPE = true
+
+
+local default_schemedir = "/lib/uci/schema"
local function _assert( condition, fmt, ... )
if not condition then
end
end
+
+--- Object constructor
+-- @class function
+-- @name UVL
+-- @param schemedir Path to the scheme directory (optional)
+-- @return Instance object
UVL = luci.util.class()
function UVL.__init__( self, schemedir )
self.packages = { }
self.beenthere = { }
self.uci = luci.model.uci
+ self.dep = luci.uvl.dependencies
self.log = luci.uvl.loghelper
self.datatypes = luci.uvl.datatypes
end
+--- Parse given scheme and return the scheme tree.
+-- @param scheme Name of the scheme to parse
+-- @return Table containing the parsed scheme or nil on error
+-- @return String containing the reason for errors (if any)
+function UVL.get_scheme( self, scheme )
+ if not self.packages[scheme] then
+ local ok, err = pcall( self.read_scheme, self, scheme )
+ if not ok then
+ return nil, self.log.scheme_error( scheme, err )
+ end
+ end
+ return self.packages[scheme], nil
+end
+
+--- Return a table containing the dependencies of specified section or option.
+-- @param config Name of the configuration or parsed scheme object
+-- @param section Type of the section
+-- @param option Name of the option (optional)
+-- @return Table containing the dependencies or nil on error
+-- @return String containing the reason for errors (if any)
+function UVL.get_dependencies( self, config, section, option )
+ config = ( type(config) == "string" and self:get_scheme(config) or config )
+
+ local deps = { }
+ local dt
+
+ if not config.sections[section] then return deps end
+
+ if option and config.variables[section][option] then
+ dt = config.variables[section][option].depends
+ else
+ dt = config.sections[section].depends
+ end
+
+ if dt then
+ for _, d in ipairs(dt) do
+ local sdeps = { }
+ for k, v in pairs(d) do
+ local r = self.dep._parse_reference( k )
+ if r then
+ sdeps[r] = v
+ else
+ return nil,
+ 'Ambiguous dependency reference "%s" for object "%s" given'
+ %{ k, self.log.id( config.name, section, option ) }
+ end
+ end
+ table.insert( deps, sdeps )
+ end
+ end
+ return deps
+end
+
+--- Validate given configuration, section or option.
+-- @param config Name of the configuration to validate
+-- @param section Name of the section to validate (optional)
+-- @param option Name of the option to validate (optional)
+-- @return Boolean indicating whether the given config validates
+-- @return String containing the reason for errors (if any)
+function UVL.validate( self, config, section, option )
+ if config and section and option then
+ return self:validate_option( config, section, option )
+ elseif config and section then
+ return self:validate_section( config, section )
+ elseif config then
+ return self:validate_config( config )
+ end
+end
+
--- Validate given configuration.
-- @param config Name of the configuration to validate
--- @param scheme Scheme to validate against (optional)
--- @return Boolean indicating weather the given config validates
+-- @return Boolean indicating whether the given config validates
-- @return String containing the reason for errors (if any)
-function UVL.validate( self, config )
+function UVL.validate_config( self, config )
+
+ if not self.packages[config] then
+ local ok, err = pcall( self.read_scheme, self, config )
+ if not ok then
+ return false, self.log.scheme_error( config, err )
+ end
+ end
+
self.uci.load_config( config )
self.beenthere = { }
local co = self.uci.get_all( config )
local sc = { }
+ if not co then
+ return false, 'Unable to load configuration "%s"' % config
+ end
+
local function _uci_foreach( type, func )
local ok, err
for k, v in pairs(co) do
for k, v in pairs(co) do
if not self.beenthere[config..'.'..k] then
return false, self.log.config_error( config,
- "Section '" .. config .. '.' .. co[k]['.type'] ..
- "' not found in scheme" )
+ 'Section "%s" not found in scheme'
+ % self.log.id( config, co[k]['.type'] ) )
end
end
end
if s.required and sc[k] == 0 then
return false, self.log.config_error( config,
- 'Required section "' .. k .. '" not found in config' )
+ 'Required section "%s" not found in config' % k )
elseif s.unique and sc[k] > 1 then
return false, self.log.config_error( config,
- 'Unique section "' .. k .. '" occurs multiple times in config' )
+ 'Unique section "%s" occurs multiple times in config' % k )
end
end
return true, nil
end
+--- Validate given config section.
+-- @param config Name of the configuration to validate
+-- @param section Name of the section to validate
+-- @return Boolean indicating whether the given config validates
+-- @return String containing the reason for errors (if any)
function UVL.validate_section( self, config, section )
+
+ if not self.packages[config] then
+ local ok, err = pcall( self.read_scheme, self, config )
+ if not ok then
+ return false, self.log.scheme_error( config, err )
+ end
+ end
+
self.uci.load_config( config )
self.beenthere = { }
local co = self.uci.get_all( config )
+
+ if not co then
+ return false, 'Unable to load configuration "%s"' % config
+ end
+
if co[section] then
return self:_validate_section( luci.uvl.section(
self, co, co[section]['.type'], config, section
) )
else
- return false, "Section '" .. config .. '.' .. section ..
- "' not found in config. Nothing to do."
+ return false, 'Section "%s" not found in config. Nothing to do.'
+ % self.log.id( config, section )
end
end
+--- Validate given config option.
+-- @param config Name of the configuration to validate
+-- @param section Name of the section to validate
+-- @param option Name of the option to validate
+-- @return Boolean indicating whether the given config validates
+-- @return String containing the reason for errors (if any)
function UVL.validate_option( self, config, section, option )
+
+ if not self.packages[config] then
+ local ok, err = pcall( self.read_scheme, self, config )
+ if not ok then
+ return false, self.log.scheme_error( config, err )
+ end
+ end
+
self.uci.load_config( config )
self.beenthere = { }
local co = self.uci.get_all( config )
+
+ if not co then
+ return false, 'Unable to load configuration "%s"' % config
+ end
+
if co[section] and co[section][option] then
return self:_validate_option( luci.uvl.option(
self, co, co[section]['.type'], config, section, option
) )
else
- return false, "Option '" ..
- config .. '.' .. section .. '.' .. option ..
- "' not found in config. Nothing to do."
+ return false, 'Option "%s" not found in config. Nothing to do.'
+ % self.log.id( config, section, option )
end
end
---- Validate given section of given configuration.
--- @param config Name of the configuration to validate
--- @param section Key of the section to validate
--- @param scheme Scheme to validate against
--- @return Boolean indicating weather the given config validates
--- @return String containing the reason for errors (if any)
+
function UVL._validate_section( self, section )
if section:values() then
+ if section:section().named == true and
+ section:values()['.anonymous'] == true
+ then
+ return false, self.log.section_error( section,
+ 'The section of type "%s" is stored anonymously in config but must be named'
+ % section:sid() )
+ end
for _, v in ipairs(section:variables()) do
local ok, err = self:_validate_option( v )
return false, err
end
else
- print( "Error, scheme section '" .. section:sid() .. "' not found in data" )
+ return false, 'Option "%s" not found in config' % section:sid()
end
if STRICT_UNKNOWN_OPTIONS and not section:section().dynamic then
if k:sub(1,1) ~= "." and not self.beenthere[
section:cid() .. '.' .. k
] then
- return false, "Option '" .. section:sid() .. '.' .. k ..
- "' not found in scheme"
+ return false, 'Option "%s" not found in scheme'
+ % self.log.id( section:sid(), k )
end
end
end
return true, nil
end
---- Validate given option within section of given configuration.
--- @param config Name of the configuration to validate
--- @param section Key of the section to validate
--- @param option Name of the option to validate
--- @param scheme Scheme to validate against
--- @return Boolean indicating weather the given config validates
--- @return String containing the reason for errors (if any)
function UVL._validate_option( self, option, nodeps )
- if not option:option() and
- not ( option:section() and option:section().dynamic )
- then
- return false, "Option '" .. option:cid() ..
- "' not found in scheme"
- end
+ local item = option:option()
+ local val = option:value()
+
+ if not item and not ( option:section() and option:section().dynamic ) then
+ return false, 'Option "%s" not found in scheme' % option:cid()
- if option:option() then
- if option:option().required and not option:value() then
- return false, "Mandatory variable '" .. option:cid() ..
- "' doesn't have a value"
+ elseif item then
+ if item.required and not val then
+ return false, 'Mandatory variable "%s" does not have a value'
+ % option:cid()
end
- if option:option().type == "enum" and option:value() then
- if not option:option().values or
- not option:option().values[option:value()]
- then
- return false, "Value '" .. ( option:value() or '<nil>' ) ..
- "' of given option '" .. option:cid() ..
- "' is not defined in enum { " ..
- table.concat(luci.util.keys(option:option().values),", ") ..
- " }"
+ if ( item.type == "reference" or item.type == "enum" ) and val then
+ if not item.values or not item.values[val] then
+ return false,
+ 'Value "%s" of given option "%s" is not defined in %s { %s }'
+ %{ val or '<nil>', option:cid(), item.type,
+ table.concat( luci.util.keys(item.values or {}), ", " ) }
+ end
+ elseif item.type == "list" and val then
+ if type(val) ~= "table" and STRICT_LIST_TYPE then
+ return false,
+ 'Option "%s" is defined as list but stored as plain value'
+ % option:cid()
end
end
- if option:option().datatype and option:value() then
- if self.datatypes[option:option().datatype] then
- if not self.datatypes[option:option().datatype](
- option:value()
- ) then
- return false, "Value '" .. ( option:value() or '<nil>' ) ..
- "' of given option '" .. option:cid() ..
- "' doesn't validate as datatype '" ..
- option:option().datatype .. "'"
+ if item.datatype and val then
+ if self.datatypes[item.datatype] then
+ val = ( type(val) == "table" and val or { val } )
+ for i, v in ipairs(val) do
+ if not self.datatypes[item.datatype]( v ) then
+ return false,
+ 'Value%s "%s" of given option "%s" does not validate as datatype "%s"'
+ %{ ( #val>1 and ' #' .. i or '' ), v,
+ option:cid(), item.datatype }
+ end
end
else
- return false, "Unknown datatype '" ..
- option:option().datatype .. "' encountered"
+ return false, 'Unknown datatype "%s" encountered'
+ % item.datatype
end
end
if not nodeps then
return luci.uvl.dependencies.check( self, option )
end
+
+ local ok, err = luci.uvl.validation.check( self, option )
+ if not ok and STRICT_EXTERNAL_VALIDATORS then
+ return false, self.log.validator_error( option, err )
+ end
end
return true, nil
end
---- Find all parts of given scheme and construct validation tree
+--- Find all parts of given scheme and construct validation tree.
+-- This is normally done on demand, so you don't have to call this function
+-- by yourself.
-- @param scheme Name of the scheme to parse
--- @return Parsed scheme
function UVL.read_scheme( self, scheme )
local schemes = { }
+ local files = luci.fs.glob(self.schemedir .. '/*/' .. scheme)
- for i, file in ipairs( luci.fs.glob(self.schemedir .. '/*/' .. scheme) ) do
- _assert( luci.fs.access(file), "Can't access file '%s'", file )
+ if files then
+ for i, file in ipairs( files ) do
+ _assert( luci.fs.access(file), "Can't access file '%s'", file )
- self.uci.set_confdir( luci.fs.dirname(file) )
- self.uci.load( luci.fs.basename(file) )
+ self.uci.set_confdir( luci.fs.dirname(file) )
+ self.uci.load( luci.fs.basename(file) )
- table.insert( schemes, self.uci.get_all( luci.fs.basename(file) ) )
- end
+ table.insert( schemes, self.uci.get_all( luci.fs.basename(file) ) )
+ end
- return self:_read_scheme_parts( scheme, schemes )
+ return self:_read_scheme_parts( scheme, schemes )
+ else
+ error( 'Can not find scheme "%s" in "%s"' %{ scheme, self.schemedir } )
+ end
end
-- Process all given parts and construct validation tree
local function _id( c, t )
if c == TYPE_SECTION then
return string.format(
- "section '%s.%s'",
+ 'section "%s.%s"',
scheme, t.name or '?' )
elseif c == TYPE_VARIABLE then
return string.format(
- "variable '%s.%s.%s'",
+ 'variable "%s.%s.%s"',
scheme, t.section or '?.?', t.name or '?' )
elseif c == TYPE_ENUM then
return string.format(
- "enum '%s.%s.%s'",
+ 'enum "%s.%s.%s"',
scheme, t.variable or '?.?.?', t.value or '?' )
end
end
-- helper function to check for required fields
local function _req( c, t, r )
for i, v in ipairs(r) do
- _assert( t[v], "Missing required field '%s' in %s", v, _id(c, t) )
+ _assert( t[v], 'Missing required field "%s" in %s', v, _id(c, t) )
end
end
local r = luci.util.split( t[k], "." )
r[1] = ( #r[1] > 0 and r[1] or scheme )
- _assert( #r == c, "Malformed %s reference in %s", k, _id(c, t) )
+ _assert( #r == c, 'Malformed %s reference in %s', k, _id(c, t) )
return r
end
self.packages[r[1]] =
self.packages[r[1]] or {
+ ["name"] = r[1];
["sections"] = { };
["variables"] = { };
}
for k, v2 in pairs(v) do
if k ~= "name" and k ~= "package" and k:sub(1,1) ~= "." then
- if k:match("^depends") then
+ if k == "depends" then
s["depends"] = _assert(
self:_read_dependency( v2, s["depends"] ),
- "Section '%s' in scheme '%s' has malformed " ..
- "dependency specification in '%s'",
+ 'Section "%s" in scheme "%s" has malformed ' ..
+ 'dependency specification in "%s"',
v.name or '<nil>', scheme or '<nil>', k
)
- elseif k == "dynamic" or k == "unique" or k == "required" then
+ elseif k == "dynamic" or k == "unique" or
+ k == "required" or k == "named"
+ then
s[k] = _bool(v2)
else
s[k] = v2
end
end
end
+
+ s.dynamic = s.dynamic or false
+ s.unique = s.unique or false
+ s.required = s.required or false
+ s.named = s.named or false
end
end
end
local r = _ref( TYPE_VARIABLE, v )
local p = _assert( self.packages[r[1]],
- "Variable '%s' in scheme '%s' references unknown package '%s'",
+ 'Variable "%s" in scheme "%s" references unknown package "%s"',
v.name, scheme, r[1] )
local s = _assert( p.variables[r[2]],
- "Variable '%s' in scheme '%s' references unknown section '%s'",
+ 'Variable "%s" in scheme "%s" references unknown section "%s"',
v.name, scheme, r[2] )
s[v.name] = s[v.name] or { }
for k, v2 in pairs(v) do
if k ~= "name" and k ~= "section" and k:sub(1,1) ~= "." then
- if k:match("^depends") then
+ if k == "depends" then
t["depends"] = _assert(
self:_read_dependency( v2, t["depends"] ),
'Invalid reference "%s" in "%s.%s.%s"',
v2, v.name, scheme, k
)
- elseif k:match("^validator") then
+ elseif k == "validator" then
t["validators"] = _assert(
self:_read_validator( v2, t["validators"] ),
- "Variable '%s' in scheme '%s' has malformed " ..
- "validator specification in '%s'",
+ 'Variable "%s" in scheme "%s" has malformed ' ..
+ 'validator specification in "%s"',
v.name, scheme, k
)
+ elseif k == "valueof" then
+ local values, err = self:_read_reference( v2 )
+
+ _assert( values,
+ 'Variable "%s" in scheme "%s" has invalid ' ..
+ 'reference specification:\n%s',
+ v.name, scheme, err )
+
+ t.type = "reference"
+ t.values = values
elseif k == "required" then
t[k] = _bool(v2)
else
- t[k] = v2
+ t[k] = t[k] or v2
end
end
end
t.type = t.type or "variable"
+ t.datatype = t.datatype or "string"
t.required = t.required or false
end
end
_req( TYPE_ENUM, v, { "value", "variable" } )
local r = _ref( TYPE_ENUM, v )
-
local p = _assert( self.packages[r[1]],
- "Enum '%s' in scheme '%s' references unknown package '%s'",
+ 'Enum "%s" in scheme "%s" references unknown package "%s"',
v.value, scheme, r[1] )
local s = _assert( p.variables[r[2]],
- "Enum '%s' in scheme '%s' references unknown section '%s'",
+ 'Enum "%s" in scheme "%s" references unknown section "%s"',
v.value, scheme, r[2] )
local t = _assert( s[r[3]],
- "Enum '%s' in scheme '%s', section '%s' references " ..
- "unknown variable '%s'",
+ 'Enum "%s" in scheme "%s", section "%s" references ' ..
+ 'unknown variable "%s"',
v.value, scheme, r[2], r[3] )
_assert( t.type == "enum",
- "Enum '%s' in scheme '%s', section '%s' references " ..
- "variable '%s' with non enum type '%s'",
+ 'Enum "%s" in scheme "%s", section "%s" references ' ..
+ 'variable "%s" with non enum type "%s"',
v.value, scheme, r[2], r[3], t.type )
if not t.values then
t.values[v.value] = v.title or v.value
end
+ if not t.enum_depends then
+ t.enum_depends = { }
+ end
+
if v.default then
_assert( not t.default,
- "Enum '%s' in scheme '%s', section '%s' redeclares " ..
- "the default value of variable '%s'",
+ 'Enum "%s" in scheme "%s", section "%s" redeclares ' ..
+ 'the default value of variable "%s"',
v.value, scheme, r[2], v.variable )
t.default = v.value
end
+
+ if v.depends then
+ t.enum_depends[v.value] = _assert(
+ self:_read_dependency(
+ v.depends, t.enum_depends[v.value]
+ ),
+ 'Invalid reference "%s" in "%s.%s.%s.%s"',
+ v.depends, scheme, r[2], r[3], v.value
+ )
+ end
end
end
end
end
-- Read a dependency specification
-function UVL._read_dependency( self, value, deps )
- local parts = luci.util.split( value, "%s*,%s*", nil, true )
- local condition = { }
-
- for i, val in ipairs(parts) do
- local k, v = unpack(luci.util.split( val, "%s*=%s*", nil, true ))
-
- if k and (
- k:match("^%$?[a-zA-Z0-9_]+%.%$?[a-zA-Z0-9_]+%.%$?[a-zA-Z0-9_]+$") or
- k:match("^%$?[a-zA-Z0-9_]+%.%$?[a-zA-Z0-9_]+$") or
- k:match("^%$?[a-zA-Z0-9_]+$")
- ) then
- condition[k] = v or true
- else
- return nil
- end
- end
+function UVL._read_dependency( self, values, deps )
+ local expr = "%$?[a-zA-Z0-9_]+"
+ if values then
+ values = ( type(values) == "table" and values or { values } )
+ for _, value in ipairs(values) do
+ local parts = luci.util.split( value, "%s*,%s*", nil, true )
+ local condition = { }
+ for i, val in ipairs(parts) do
+ local k, v = unpack(luci.util.split(val, "%s*=%s*", nil, true))
+
+ if k and (
+ k:match("^"..expr.."%."..expr.."%."..expr.."$") or
+ k:match("^"..expr.."%."..expr.."$") or
+ k:match("^"..expr.."$")
+ ) then
+ condition[k] = v or true
+ else
+ return nil
+ end
+ end
- if not deps then
- deps = { condition }
- else
- table.insert( deps, condition )
+ if not deps then
+ deps = { condition }
+ else
+ table.insert( deps, condition )
+ end
+ end
end
return deps
end
-- Read a validator specification
-function UVL._read_validator( self, value, validators )
- local validator
+function UVL._read_validator( self, values, validators )
+ if values then
+ values = ( type(values) == "table" and values or { values } )
+ for _, value in ipairs(values) do
+ local validator
+
+ if value:match("^exec:") then
+ validator = value:gsub("^exec:","")
+ elseif value:match("^lua:") then
+ validator = self:_resolve_function( (value:gsub("^lua:","") ) )
+ end
- if value and value:match("/") and self.datatypes.file(value) then
- validator = value
- else
- validator = self:_resolve_function( value )
+ if validator then
+ if not validators then
+ validators = { validator }
+ else
+ table.insert( validators, validator )
+ end
+ else
+ return nil
+ end
+ end
+
+ return validators
end
+end
+
+-- Read a reference specification (XXX: We should validate external configs too...)
+function UVL._read_reference( self, values )
+ local val = { }
+ values = ( type(values) == "table" and values or { values } )
+
+ for _, value in ipairs(values) do
+ local ref = luci.util.split(value, ".")
+
+ if #ref == 2 or #ref == 3 then
+ self.uci.load_config(ref[1])
+ local co = self.uci.get_all(ref[1])
+
+ if not co then
+ return nil, 'Can not load config "%s" for reference "%s"'
+ %{ ref[1], value }
+ end
- if validator then
- if not validators then
- validators = { validator }
+ for k, v in pairs(co) do
+ if v['.type'] == ref[2] then
+ if #ref == 2 then
+ if v['.anonymous'] == true then
+ return nil, 'Illegal reference "%s" to an anonymous section'
+ % value
+ end
+ val[k] = k -- XXX: title/description would be nice
+ elseif v[ref[3]] then
+ val[v[ref[3]]] = v[ref[3]] -- XXX: dito
+ end
+ end
+ end
else
- table.insert( validators, validator )
+ return nil, 'Malformed reference "%s"' % value
end
-
- return validators
end
+
+ return val, nil
end
-- Resolve given path
end
+--- Object representation of a scheme/config section.
+-- @class module
+-- @cstyle instance
+-- @name luci.uvl.section
+
+--- Section instance constructor.
+-- @class function
+-- @name section
+-- @param scheme Scheme instance
+-- @param co Configuration data
+-- @param st Section type
+-- @param c Configuration name
+-- @param s Section name
+-- @return Section instance
section = luci.util.class()
function section.__init__(self, scheme, co, st, c, s)
self.type = luci.uvl.TYPE_SECTION
end
+--- Get the config path of this section.
+-- @return String containing the identifier
function section.cid(self)
return ( self.cref[1] or '?' ) .. '.' .. ( self.cref[2] or '?' )
end
+--- Get the scheme path of this section.
+-- @return String containing the identifier
function section.sid(self)
return ( self.sref[1] or '?' ) .. '.' .. ( self.sref[2] or '?' )
end
+--- Get all configuration values within this section.
+-- @return Table containing the values
function section.values(self)
return self.csection
end
+--- Get the associated section information in scheme.
+-- @return Table containing the scheme properties
function section.section(self)
return self.ssection
end
+--- Get all option objects associated with this section.
+-- @return Table containing all associated luci.uvl.option instances
function section.variables(self)
local v = { }
if self.scheme.packages[self.sref[1]].variables[self.sref[2]] then
end
+--- Object representation of a scheme/config option.
+-- @class module
+-- @cstyle instance
+-- @name luci.uvl.option
+
+--- Section instance constructor.
+-- @class function
+-- @name option
+-- @param scheme Scheme instance
+-- @param co Configuration data
+-- @param st Section type
+-- @param c Configuration name
+-- @param s Section name
+-- @param o Option name
+-- @return Option instance
option = luci.util.class()
function option.__init__(self, scheme, co, st, c, s, o)
self.type = luci.uvl.TYPE_OPTION
end
+--- Get the config path of this option.
+-- @return String containing the identifier
function option.cid(self)
return ( self.cref[1] or '?' ) .. '.' ..
( self.cref[2] or '?' ) .. '.' ..
( self.cref[3] or '?' )
end
+--- Get the scheme path of this option.
+-- @return String containing the identifier
function option.sid(self)
return ( self.sref[1] or '?' ) .. '.' ..
( self.sref[2] or '?' ) .. '.' ..
( self.sref[3] or '?' )
end
+--- Get the value of this option.
+-- @return The associated configuration value
function option.value(self)
return self.coption
end
+--- Get the associated option information in scheme.
+-- @return Table containing the scheme properties
function option.option(self)
return self.soption
end
+--- Get the associated section information in scheme.
+-- @return Table containing the scheme properties
function option.section(self)
return self.scheme.packages[self.sref[1]].sections[self.sref[2]]
end