First version of an icon import script (cf #201)

.gitignore

@@ -5,3 +5,4 @@ umap/settings/local/*
 docs/_build
 umap/remote_static
 .idea
+tmp/*

osmic-white.yaml

+input_dirs:
+  - "accommodation"
+  - "administration"
+  - "amenity"
+  - "barrier"
+  - "eat-drink"
+  - "emergency"
+  - "energy"
+  - "health"
+  - "money"
+  - "nature"
+  - "outdoor"
+  - "religious"
+  - "shop"
+  - "sports"
+  - "tourism"
+  - "transport"
+
+output: "tmp/white"
+empty_output: true
+format: "png"
+subdirs: false
+
+global_style:
+  padding: 4
+  fill: "#ededed"
+
+  halo:
+    fill: "#444444"
+    width: 1
+    opacity: 0.3

osmic.yaml

+input_dirs:
+  - "accommodation"
+  - "administration"
+  - "amenity"
+  - "barrier"
+  - "eat-drink"
+  - "emergency"
+  - "energy"
+  - "health"
+  - "money"
+  - "nature"
+  - "outdoor"
+  - "religious"
+  - "shop"
+  - "sports"
+  - "tourism"
+  - "transport"
+
+output: "tmp/grey"
+empty_output: true
+format: "png"
+subdirs: false
+
+global_style:
+  padding: 4
+  fill: "#444444"
+
+  halo:
+    fill: "#ededed"
+    width: 1
+    opacity: 0.3

umap/management/commands/import_pictograms.py

+import os
+
+from django.core.files import File
+from django.core.management.base import BaseCommand
+
+from leaflet_storage.models import Pictogram
+
+
+class Command(BaseCommand):
+    help = 'Import pictograms from a folder'
+
+    def add_arguments(self, parser):
+        parser.add_argument('path')
+        parser.add_argument('--attribution', required=True,
+                            help='Attribution of the imported pictograms')
+        parser.add_argument('--suffix',
+                            help='Optionnal suffix to add to each name')
+        parser.add_argument('--force', action='store_true',
+                            help='Update picto if it already exists.')
+
+    def handle(self, *args, **options):
+        path = options['path']
+        attribution = options['attribution']
+        suffix = options['suffix']
+        force = options['force']
+        for filename in os.listdir(path):
+            if filename.endswith("-24.png"):
+                name = self.extract_name(filename)
+                if suffix:
+                    name = '{name}{suffix}'.format(name=name, suffix=suffix)
+                picto = Pictogram.objects.filter(name=name).last()
+                if picto:
+                    if not force:
+                        self.stdout.write(u"⚠ Pictogram with name '{name}' already exists. Skipping.".format(name=name))  # noqa
+                        continue
+                else:
+                    picto = Pictogram()
+                    picto.name = name
+                filepath = os.path.join(path, filename)
+                with open(filepath, 'rb') as f:
+                    picto.attribution = attribution
+                    picto.pictogram.save(filename, File(f), save=True)
+                    self.stdout.write(u"✔ Imported pictogram {filename}.".format(filename=filename))  # noqa
+
+    def extract_name(self, filename):
+        return filename[:-7].replace('-', ' ')