cartocc
v0.0.3
Published
Carto Config Customizer is a very simple tool for customizing layers values of a `.mml` config file
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CartoCC — Carto Config Customizer
Very simple tool for customizing layers values of a .mml
config file.
Warning: it's experimental and work in progress.
Usage
For example, you may want to customize the database connection or some shp file path.
CartoCC makes it very simple. You just create some rules, stored in a json file, applying to layers fields. Each rule define some values to set to a layer if some field has some value.
Example of rules:
[
{
"if": {
"Datasource.type": "postgis"
},
"then": {
"Datasource.dbname": "osm2",
"Datasource.host": "localhost2",
"Datasource.password": "blahblah"
}
},
{
"if": {
"class": "shp"
},
"then": {
"Datasource.file": "/data/{id}.shp"
}
}
]
You can also have multiple conditions (which are ANDed):
[
{
"if": {
"geometry": "multipolygon",
"class": "bigdata"
},
"then": {
"Datasource.dbname": "anotherdb",
"Datasource.host": "hostforbigqueries",
"Datasource.password": "123456"
}
}
]
You can also test on an array of values (which are ORed):
[
{
"if": {
"id": ["id1", "id2"]
},
"then": {
"Datasource.dbname": "anotherdb",
"Datasource.host": "anotherhost",
"Datasource.password": "123456"
}
}
]
You can use dynamic properties of the layer in the final value (this will use Layer.id in the final path):
[
{
"if": {
"class": "shp"
},
"then": {
"Datasource.file": "/data/{id}/{id}.shp"
}
}
]
Notes:
- Fields are relative to
Layer
. You can use a path as field reference. For example,Datasource.type
will look for the fieldtype
ofLayer.Datasource
. - only first matching rule apply
Then run the script from command line to get the customized .mml
file:
node cartocc.js <path-to-project.mml> <path-to-custom-rules.json> > local_project.mml