Update analyzer build/testing script to download necessary Python packages

salt/sensoroni/files/analyzers/build.sh

@@ -1,5 +1,8 @@
 #!/bin/bash
 
+COMMAND=$1
+
+function ci() {
     HOME_DIR=$(dirname "$0")
     TARGET_DIR=${1:-.}
 
@@ -13,3 +16,20 @@ fi
 
     flake8 "$TARGET_DIR" "--config=${HOME_DIR}/pytest.ini"
     pytest "$TARGET_DIR" "--cov-config=${HOME_DIR}/pytest.ini" "--cov=$TARGET_DIR" --doctest-modules --cov-report=term --cov-fail-under=100
+}
+
+function download() {
+    ANALYZERS=$1
+    if [[ $ANALYZERS = "all" ]]; then
+        ANALYZERS="*/"
+    fi
+    for ANALYZER in $ANALYZERS; do
+        docker exec -it so-sensoroni pip download -r /opt/sensoroni/analyzers/$ANALYZER/requirements.txt -d /opt/sensoroni/analyzers/$ANALYZER/source-packages
+    done
+}
+
+if [[ "$COMMAND" == "download" ]]; then
+  download "$2"
+else
+  ci
+fi