fr.jeremyschoffen.mbt.alpha.default.config — fr.jeremyschoffen/mbt-alpha 14

In mbt's default api, several config value are computed by default. This API provides the mechanisms used to construct a project's config map.

Lets take an example to illustrate the way this API is tu be used.

The name of an artefact in tools deps is a symbol whose namespace represents its group id and whose name represents its general name. The name is itself subject to be divided into artefact name and classifier. Mbt also has a concept of major version that will add a suffix to artefact names.

Let's say we are building an artefact named com.my-group/my-project-alpha$sources. A simplified config could then look like this:

(def conf {:project/name 'my-project
           :maven/group-id 'com.my-group
           :maven/classifier 'sources
           :versioning/major :alpha

           :maven/artefact-name (calc compute-artefact-name :project/name :versioning/major)
           :computed-coordinate (calc compute-coord-name :maven/artefact-name
                                                         :maven/group-id
                                                         :maven/classifier)})

Here, the first 4 values in the map are given. The last 2 are to be computed, the second one depending on the result of the first. These computations are 'declared' with the (calc computation & dependencies) scheme. Assuming we have the functions such as:

(compute-artefact-name {:project/name 'my-project
                        :versioning/major :alpha})
;=> 'my-project-alpha


(compute-artefact-name {:maven/artefact-name 'my-project-alpha
                        :maven/group-id 'com.my-group
                        :maven/classifier 'sources})
;=> 'com.my-group/my-project-alpha$sources

The compute utility perform several operations with this config. It will:

1. find the keys that need to be computed (:maven/artefact-name & :computed-coordinate)
2. establish a dependency graph between these computation
3. run the computations in order to satisfy dependencies (topological sort of the dependency graph)
4. return a map based on the original where the value that were computations are now the result of these computations.

(compute-conf conf)
;=> {:project/name 'my-project
     :maven/group-id 'com.my-group
     :maven/classifier 'sources
     :versioning/major :alpha

     :maven/artefact-name 'my-project-alpha
     :computed-coordinate 'com.my-group/my-project-alpha$sources}

:maven/artefact-name and :computed-coordinate have been computed based on other values in the config map.

base clj

The base config containing default values and constructors (see fr.jeremyschoffen.mbt.alpha.default.config/calc) for config keys.

calc clj

(calc f & deps)

Define a computation to be made in the config.

args:

• f: a function of 1 argument (map whose keys are the deps) that returns a value to be placed in the config.
• deps: keywords declaring which keys of the config the computation depends on.

clone-key clj

(clone-key k)

Make a calc using fr.jeremyschoffen.mbt.alpha.default.config/calc to easily duplicate a value in the config.

(calc :k :k)
; <=>
(clone-val :k)

compute-conf clj

(compute-conf conf)

Takes a config and compute the parts marked for computation.

A config is a map from keys to values. Special values are made using the fr.jeremyschoffen.mbt.alpha.default.config.impl/calc function. It marks these values of the config map for computation.

make-base-config clj

(make-base-config)

(make-base-config user-defined)

Make the config for a project, user-defined values or constructors are merged into fr.jeremyschoffen.mbt.alpha.default.config/base then the config is computed using fr.jeremyschoffen.mbt.alpha.default.config/compute-conf.

pprint-deps clj

(pprint-deps config)

Use ubergraph to pprint the dependency graph of config values.