my_buildctl : split into 2 functions

functions.sh

@@ -260,24 +260,18 @@ get_podman_volume_path () {
     podman volume inspect --format '{{ .Mountpoint }}' ${1}
 }
 
-# Execute buildctl directly from the web
-my_buildctl () {
-    opts=$(echo -n "$@")
-
+# Execute elf binary from stdin
+elfexec () {
+    opts=$(echo "$@")
     if [[ $(uname -i) == 'aarch64' ]]; then
-	buildkitarch='arm64'
 	memfd_create='279'
     elif [[ $(uname -i) == 'x86_64' ]]; then
-	buildkitarch='amd64'
 	memfd_create='319'
     else
 	# defaults to amd64
-	buildkitarch='amd64'
 	memfd_create='319'
     fi
 
-    curl -sSLf https://github.com/moby/buildkit/releases/download/v0.9.3/buildkit-v0.9.3.linux-${buildkitarch}.tar.gz |
-	tar xOz bin/buildctl |
     python3 -c "
 import ctypes, os;
 from sys import stdin;
@@ -290,3 +284,17 @@ p = '/proc/self/fd/%d' % f;
 myargs='${opts}';
 os.execve(p, ['buildctl'] + myargs.split(), {'PATH': '${PATH}'})"
 }
+
+# Execute buildctl directly from the web
+my_buildctl () {
+    if [[ $(uname -i) == 'aarch64' ]]; then
+	buildkitarch='arm64'
+    elif [[ $(uname -i) == 'x86_64' ]]; then
+	buildkitarch='amd64'
+    else
+	# defaults to amd64
+	buildkitarch='amd64'
+    fi
+    curl -sSLf https://github.com/moby/buildkit/releases/download/v0.9.3/buildkit-v0.9.3.linux-${buildkitarch}.tar.gz |
+	tar xOz bin/buildctl | elfexec "${@}"
+}