use pip within conda, update docs + links

scripts/init-vlsi.sh

@@ -4,24 +4,25 @@
 set -e
 set -o pipefail
 
-# Initialize HAMMER and CAD-plugins
-git submodule update --init --recursive vlsi/hammer
+# exit script if not in Chipyard conda env
+if [[ `basename $CONDA_PREFIX` != .conda-env ]]; then
+    echo 'ERROR: Chipyard conda env not activated. Please source env.sh and run this script again.'
+    exit
+fi
+
+# Initialize HAMMER CAD-plugins
 if [[ $1 != *openroad* ]] && [[ $2 != *openroad* ]]; then
     git submodule update --init --recursive vlsi/hammer-cadence-plugins
+    pip install -e vlsi/hammer-cadence-plugins
     git submodule update --init --recursive vlsi/hammer-synopsys-plugins
+    pip install -e vlsi/hammer-synopsys-plugins
     git submodule update --init --recursive vlsi/hammer-mentor-plugins
+    pip install -e vlsi/hammer-mentor-plugins
 fi
 
 # Initialize HAMMER tech plugin
 # And add tech plugin to conda dependencies
 if [[ $1 != *asap7* ]] && [[ $1 != *sky130* ]]; then
     git submodule update --init --recursive vlsi/hammer-$1-plugin
-    echo '        '- -e ../vlsi/hammer-$1-plugin >> conda-reqs/vlsi.yaml
+    pip install -e vlsi/hammer-$1-plugin
 fi
-
-# Update the conda-env with the plugins
-if [[ `basename $CONDA_PREFIX` != .conda-env ]]; then
-    echo 'Activating Chipyard conda environment...'
-    source env.sh
-fi
-conda env update -f conda-reqs/vlsi.yaml