krata: rewrite all repo infrastructure

scripts/build/target.sh

@@ -0,0 +1,29 @@
+#!/bin/sh
+set -e
+
+if [ -z "${RUST_LIBC}" ]
+then
+  RUST_LIBC="gnu"
+fi
+
+if [ -z "${RUST_TARGET}" ]
+then
+  HOST_ARCH="$(uname -m)"
+  if [ "${HOST_ARCH}" = "x86_64" ]
+  then
+    RUST_TARGET="x86_64-unknown-linux-${RUST_LIBC}"
+  fi
+
+  if [ "${HOST_ARCH}" = "aarch64" ]
+  then
+    RUST_TARGET="aarch64-unknown-linux-${RUST_LIBC}"
+  fi
+fi
+
+if [ -z "${RUST_TARGET}" ]
+then
+  echo "ERROR: Unable to determine RUST_TARGET, your architecture may not be supported by krata." > /dev/stderr
+  exit 1
+fi
+
+echo "${RUST_TARGET}"