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diff --git a/docs/markdown/Keyval-module.md b/docs/markdown/Keyval-module.md new file mode 100644 index 0000000..643265e --- /dev/null +++ b/docs/markdown/Keyval-module.md @@ -0,0 +1,55 @@ +--- +short-description: Unstable keyval module +authors: + - name: Mark Schulte, Paolo Bonzini + years: [2017, 2019] + has-copyright: false +... + +# keyval module + +This module parses files consisting of a series of `key=value` lines. One use +of this module is to load kconfig configurations in meson projects. + +**Note**:Â this does not provide kconfig frontend tooling to generate a +configuration. You still need something such as kconfig frontends (see +link below) to parse your Kconfig files, and then (after you've +chosen the configuration options), output a ".config" file. + + [kconfig-frontends]: http://ymorin.is-a-geek.org/projects/kconfig-frontends + +## Usage + +The module may be imported as follows: + +``` meson +keyval = import('unstable-keyval') +``` + +The following functions will then be available as methods on the object +with the name `keyval`. You can, of course, replace the name +`keyval` with anything else. + +### keyval.load() + +This function loads a file consisting of a series of `key=value` lines +and returns a dictionary object. + +`keyval.load()` makes no attempt at parsing the values in the file. +In particular boolean and integer values will be represented as strings, +and strings will keep any quoting that is present in the input file. It +can be useful to create a [`configuration_data()`](#configuration_data) +object from the dictionary and use methods such as `get_unquoted()`. + +Kconfig frontends usually have ".config" as the default name for the +configuration file. However, placing the configuration file in the source +directory limits the user to one configuration per source directory. +In order to allow separate configurations for each build directory, as is +the Meson standard, `meson.build` should not hardcode ".config" as the +argument to `kconfig.load()`, and should instead make the argument to +`kconfig.load()` a [project build option](Build-options.md). + +* The first (and only) argument is the path to the configuration file to + load (usually ".config"). + +**Returns**: a [dictionary object](Reference-manual.md#dictionary-object). |