chore(imagesfiles): Refactor script introducing fetch_source function

Update options preferring their more explicit long form:
`-f` is `--fail`
`-s` is `--silent`
`-S` is `--show-error`
`-L` is `--location`

Additionally, `-O` is removed in favor of explicitly specifying the output file using `-o`

imagefiles/install-cmake-binary.sh

@@ -3,6 +3,12 @@
 set -ex
 set -o pipefail
 
+# Get script directory
+SCRIPT_DIR=$(dirname "${BASH_SOURCE[0]}")
+
+# Get build utilities
+source $SCRIPT_DIR/utils.sh
+
 ARCH="x86_64"
 
 while [ $# -gt 0 ]; do
@@ -18,11 +24,6 @@ while [ $# -gt 0 ]; do
   shift
 done
 
-if ! command -v curl &> /dev/null; then
-	echo >&2 'error: "curl" not found!'
-	exit 1
-fi
-
 if ! command -v tar &> /dev/null; then
 	echo >&2 'error: "tar" not found!'
 	exit 1
@@ -36,15 +37,11 @@ fi
 cd /usr/src
 
 CMAKE_ROOT=cmake-${CMAKE_VERSION}-Centos5-${ARCH}
-url=https://github.com/dockbuild/CMake/releases/download/v${CMAKE_VERSION}/${CMAKE_ROOT}.tar.gz
-echo "Downloading $url"
-curl --connect-timeout 30 \
-    --max-time 10 \
-    --retry 5 \
-    --retry-delay 10 \
-    --retry-max-time 30 \
-    -# -LO $url
+CMAKE_DOWNLOAD_URL=https://github.com/dockbuild/CMake/releases/download/v${CMAKE_VERSION}
 
+echo "Downloading ${CMAKE_DOWNLOAD_URL}/${CMAKE_ROOT}.tar.gz"
+
+fetch_source "${CMAKE_ROOT}.tar.gz" "${CMAKE_DOWNLOAD_URL}"
 tar -xzvf "${CMAKE_ROOT}.tar.gz"
 rm -f "${CMAKE_ROOT}.tar.gz"