Add new runtime environment variable to dgoss to copy additional files (#898)

* Add an option to dgoss to copy additional directories.

* remove new line

Author: dklimpel

extras/dgoss/README.md

@@ -96,6 +96,17 @@ Time to sleep after running container (and optionally `goss_wait.yaml`) and befo
 
 Location of the goss yaml files. (Default: `.`)
 
+#### GOSS_ADDITIONAL_COPY_PATH
+
+Colon-seperated list of additional directories to copy to container.
+
+By default dgoss copies `goss.yaml` from the current working directory and
+nothing else. You may need other files like scripts and configurations copied
+as well. Specify `GOSS_ADDITIONAL_COPY_PATH` similar to `$PATH` as colon seperated
+list of directories for each additional directory you'd like to recursively copy.
+These will be copied as directories next to `goss.yaml` in the temporary
+directory `DGOSS_TEMP_DIR`. (Default: `''`)
+
 #### GOSS_VARS
 
 The name of the variables file relative to `GOSS_FILES_PATH` to copy into the

extras/dgoss/dgoss

@@ -36,6 +36,12 @@ run(){
     [[ -e "${GOSS_FILES_PATH}/${GOSS_FILE:-goss.yaml}" ]] && cp "${GOSS_FILES_PATH}/${GOSS_FILE:-goss.yaml}" "$tmp_dir/goss.yaml" && chmod 644 "$tmp_dir/goss.yaml"
     [[ -e "${GOSS_FILES_PATH}/goss_wait.yaml" ]] && cp "${GOSS_FILES_PATH}/goss_wait.yaml" "$tmp_dir" && chmod 644 "$tmp_dir/goss_wait.yaml"
     [[ -n "${GOSS_VARS}" ]] && [[ -e "${GOSS_FILES_PATH}/${GOSS_VARS}" ]] && cp "${GOSS_FILES_PATH}/${GOSS_VARS}" "$tmp_dir" && chmod 644 "$tmp_dir/${GOSS_VARS}"
+    if [ -n "$GOSS_ADDITIONAL_COPY_PATH" ]; then
+        for dir in "$(echo "$GOSS_ADDITIONAL_COPY_PATH" | sed 's/:/ /g')"; do
+            cp -r ${dir} "${tmp_dir}/"
+            chmod -R 755 "$tmp_dir/$(basename ${dir})"
+        done
+    fi
 
     # Switch between mount or cp files strategy
     GOSS_FILES_STRATEGY=${GOSS_FILES_STRATEGY:="mount"}