feat: change variable name, add docs, add + for params extension

README.md

@@ -47,8 +47,15 @@ with the previous variables defined.
 The following environment variables are optional:
 
 ```
-# export ACTIVATE_GEOMETRY_TYPE=false 
-True by default
+/**
+* PROMOTE_TO_MULTI can be used to automatically promote layers that mix polygon or multipolygons to multipolygons, 
+* and layers that mix linestrings or multilinestrings to multilinestrings. 
+* Can be useful when converting shapefiles to PostGIS 
+* and other target drivers that implement strict checks for geometry types
+*
+* Enabled by default
+**/
+# export PROMOTE_TO_MULTI=false 
 ```
 
 

vrt.sh

@@ -32,8 +32,8 @@ touch ${SOURCEDIR}/vrtbot.log
         cd "${SOURCEDIR}"
 
         params=()
-        if [[ ${ACTIVATE_GEOMETRY_TYPE:-true} == true ]]; then
-            params=(-nlt PROMOTE_TO_MULTI)
+        if [[ ${PROMOTE_TO_MULTI:-true} == true ]]; then
+            params+=(-nlt PROMOTE_TO_MULTI)
         fi
         # cycle vrt
         for vrt in *.vrt;