feat(install.sh): download and unpack the compressed file

Since v1.18.0 there are compressed files available under the `bundle/`
directory in releases.crossplane.io. This commit adds the functionality
of downloading the compressed file and unpacking it, instead of
downloading the binary, which would save some bandwidth.

In order to download/unpack a compressed file, a new env var needs to be
passed COMPRESSED=True (or true), for example:

`COMPRESSED=True XP_VERSION="v1.18.0" ./install.sh`

Related PR: crossplane/docs#929

Signed-off-by: Theo Chatzimichos <[email protected]>

Author: tampakrap

install.sh

@@ -10,6 +10,7 @@ arch=$(uname -m)
 OS=${OS:-"${os}"}
 ARCH=${ARCH:-"${arch}"}
 OS_ARCH=""
+COMPRESSED=${COMPRESSED:-"False"}
 
 BIN=${BIN:-crank}
 
@@ -61,16 +62,42 @@ case $OS in
     ;;
 esac
 
-url="https://releases.crossplane.io/${XP_CHANNEL}/${XP_VERSION}/bin/${OS_ARCH}/${BIN}"
-if ! curl -sfLo crossplane "${url}"; then
-  echo "Failed to download Crossplane CLI. Please make sure version ${XP_VERSION} exists on channel ${XP_CHANNEL}."
-  exit 1
+_compr=`echo $COMPRESSED | tr '[:upper:]' '[:lower:]'`
+
+if [ "${_compr}" = "true" ]; then
+    url_dir="bundle"
+    url_file="crank.tar.gz"
+    url_error="a compressed file for "
+else
+    url_dir="bin"
+    url_file="${BIN}"
+    url_error=""
+fi
+
+url="https://releases.crossplane.io/${XP_CHANNEL}/${XP_VERSION}/${url_dir}/${OS_ARCH}/${url_file}"
+
+if ! curl -sfL "${url}" -o "${url_file}"; then
+    echo "Failed to download Crossplane CLI. Please make sure ${url_error}version ${XP_VERSION} exists on channel ${XP_CHANNEL}."
+    exit 1
+fi
+
+if [ "${_compr}" = "true" ]; then
+    if ! tar xzf "${url_file}"; then
+        echo "Failed to unpack the Crossplane CLI compressed file."
+        exit 1
+    fi
+    if ! mv "${BIN}" crossplane; then
+        echo "Failed to rename the unpacked Crossplane CLI binary: \"${BIN}\". Make sure it exists inside the compressed file."
+    fi
+    rm "${BIN}.sha256" "${url_file}"
+else
+    mv "${url_file}" crossplane
 fi
 
 chmod +x crossplane
 
 echo "crossplane CLI downloaded successfully! Run the following commands to finish installing it:"
-echo 
+echo
 echo sudo mv crossplane /usr/local/bin
 echo crossplane --help
 echo