settings

​
Serialize simple Lua variables across Hammerspoon launches Settings must have a string key and must be made up of serializable Lua objects (string, number, boolean, nil, tables of such, etc.)
This module is based partially on code from the previous incarnation of Mjolnir by Steven Degutis.
API Overview
Constants - Useful values which cannot be changed
​bundleID​
​dateFormat​
Functions - API calls offered directly by the extension
​clear​
​get​
​getKeys​
​set​
​setData​
​setDate​
​watchKey​
API Documentation
Constants
​bundleID​
Signature
hs.settings.bundleID
Type
Constant
Description
A string representing the ID of the bundle Hammerspoon's settings are stored in . You can use this with the command line tool defaults or other tools which allow access to the User Defaults of applications, to access these outside of Hammerspoon
​dateFormat​
Signature
hs.settings.dateFormat
Type
Constant
Description
A string representing the expected format of date and time when presenting the date and time as a string to hs.setDate(). e.g. os.date(hs.settings.dateFormat)
Functions
​clear​
Signature
hs.settings.clear(key) -> bool
Type
Function
Description
Deletes a setting
Parameters
key - A string containing the name of a setting
Returns
A boolean, true if the setting was deleted, otherwise false
​get​
Signature
hs.settings.get(key) -> string or boolean or number or nil or table or binary data
Type
Function
Description
Loads a setting
Parameters
key - A string containing the name of the setting
Returns
The value of the setting
Notes
This function can load all of the datatypes supported by hs.settings.set(), hs.settings.setData() and hs.settings.setDate()
​getKeys​
Signature
hs.settings.getKeys() -> table
Type
Function
Description
Gets all of the previously stored setting names
Parameters
None
Returns
A table containing all of the settings keys in Hammerspoon's settings
Notes
Use ipairs(hs.settings.getKeys()) to iterate over all available settings
Use hs.settings.getKeys()["someKey"] to test for the existance of a particular key
​set​
Signature
hs.settings.set(key[, val])
Type
Function
Description
Saves a setting with common datatypes
Parameters
key - A string containing the name of the setting
val - An optional value for the setting. Valid datatypes are:
string
number
boolean
nil
table (which may contain any of the same valid datatypes)
Returns
None
Notes
If no val parameter is provided, it is assumed to be nil
This function cannot set dates or raw data types, see hs.settings.setDate() and hs.settings.setData()
Assigning a nil value is equivalent to clearing the value with hs.settings.clear
​setData​
Signature
hs.settings.setData(key, val)
Type
Function
Description
Saves a setting with raw binary data
Parameters
key - A string containing the name of the setting
val - Some raw binary data
Returns
None
​setDate​
Signature
hs.settings.setDate(key, val)
Type
Function
Description
Saves a setting with a date
Parameters
key - A string containing the name of the setting
val - A number representing seconds since 1970-01-01 00:00:00 +0000 (e.g. os.time()), or a string containing a date in RFC3339 format (YYYY-MM-DD[T]HH:MM:SS[Z])
Returns
None
Notes
See hs.settings.dateFormat for a convenient representation of the RFC3339 format, to use with other time/date related functions
​watchKey​
| Signature | hs.settings.watchKey(identifier, key, [fn]) -> identifier | current value | | -----------------------------------------------------|---------------------------------------------------------------------------------------------------------| | Type | Function | | Description | Get or set a watcher to invoke a callback when the specified settings key changes | | Parameters |
identifier - a required string used as an identifier for this callback
key - the settings key to watch for changes to
fn - the callback function to be invoked when the specified key changes. If this is an explicit nil, removes the existing callback.
| | Returns |
if a callback is set or removed, returns the identifier; otherwise returns the current callback function or nil if no callback function is currently defined.
| | Notes |
the identifier is required so that multiple callbacks for the same key can be registered by separate modules; it's value doesn't affect what is being watched but does need to be unique between multiple watchers of the same key.
|