Implement downloader script

download.sh

@@ -0,0 +1,62 @@
+#!/bin/sh
+#
+# Downloads file form the URL passed as $1 and saves it to path as $2.
+# Extracts the archive if needed.
+# Pass --no-cache option to force script to download a file.
+#
+
+DOWNLOAD_URL="${1}"
+DOWNLOAD_PATH="${2}.download"
+FINAL_PATH="${2}"
+CACHE=1
+
+while [ "$#" -gt 0 ]; do
+    case $1 in
+        --no-cache)
+            CACHE=0
+            ;;
+    esac
+    shift
+done
+
+# download
+if [ ! -f "${DOWNLOAD_PATH}" ]; then
+    if [ ! -d `dirname "${DOWNLOAD_PATH}"` ]; then
+        mkdir -p `dirname "${DOWNLOAD_PATH}"`
+    fi
+    echo "Downloading ${DOWNLOAD_URL}..."
+    curl -L -# -o ${DOWNLOAD_PATH} "${DOWNLOAD_URL}"
+fi
+
+# unarchive
+FILE=`file "${DOWNLOAD_PATH}" | awk '{print tolower($0)}'`
+if [[ "${FILE}" == *"zip"* ]]; then
+    echo "Unarchiving ${DOWNLOAD_PATH}..."
+
+    if [ -d "${FINAL_PATH}" ]; then
+        rm -rf "${FINAL_PATH}"
+    fi
+    mkdir -p "${FINAL_PATH}"
+
+    pushd . > /dev/null
+
+    cd "${FINAL_PATH}"
+    tar -xf "${DOWNLOAD_PATH}"
+
+    NUMBER_OF_LINES=`ls -1 | wc -l`
+    if (( ${NUMBER_OF_LINES} == 1 )); then
+        if [ -d "`ls -1`" ]; then
+            mv "${FINAL_PATH}/`ls -1`" "${FINAL_PATH}~"
+            rm -rf "${FINAL_PATH}"
+            mv "${FINAL_PATH}~" "${FINAL_PATH}"
+        fi
+    fi
+
+    popd > /dev/null
+else
+    cp "${DOWNLOAD_PATH}" "${FINAL_PATH}"
+fi
+
+if (( ${CACHE} == 0 )); then
+    rm ${DOWNLOAD_PATH}
+fi