i.sentinel.import: added extent parameter

With extent=region the import can be reduced to the current region rather than full scene import.

grass7/imagery/i.sentinel/i.sentinel.import/i.sentinel.import.html

@@ -10,6 +10,10 @@ <h2>DESCRIPTION</h2>
 reduced by the <b>pattern_file</b> option. In this option, a regular expression 
 for filtering the file names should be given, e.g. "MSIL2A.*T32VNR_2019" for 
 importing only level 2A products for tile T32VNR from 2019.
+<p>
+By default <em>i.sentinel.import</em> imports the full scene. Optionally, the
+import can be reduced to the computational region extent with
+<b>extent=region</b>.
 
 <p>
 Note that in the case that spatial reference system of input data differs

grass7/imagery/i.sentinel/i.sentinel.import/i.sentinel.import.py

@@ -42,6 +42,17 @@
 #% guisection: Filter
 #%end
 #%option
+#% key: extent
+#% type: string
+#% required: no
+#% multiple: no
+#% options: input,region
+#% answer: input
+#% description: Output raster map extent
+#% descriptions: region;extent of current region;input;extent of input map
+#% guisection: Filter
+#%end
+#%option
 #% key: memory
 #% type: integer
 #% required: no
@@ -215,9 +226,15 @@ def import_products(self, reproject=False, link=False, override=False):
                 module = 'r.import'
                 args['resample'] = 'bilinear'
                 args['resolution'] = 'value'
+                args['extent'] = options['extent']
             else:
                 module = 'r.in.gdal'
                 args['flags'] = 'o' if override else None
+                if options['extent'] == 'region':
+                    if args['flags']:
+                        args['flags'] += 'r'
+                    else:
+                        args['flags'] = 'r'
 
         for f in self.files:
             if not override and (link or (not link and not reproject)):