build(f722): centralize linker layout

firmware/scripts/create-dfu-image.sh

@@ -1,18 +1,16 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-if [[ $# -ne 1 ]]; then
-    printf 'Usage: %s <firmware.elf>\n' "$0" >&2
+if [[ $# -lt 1 || $# -gt 2 ]]; then
+    printf 'Usage: %s <firmware.elf> [memory.x]\n' "$0" >&2
     exit 2
 fi
 
 readonly input_elf="$1"
-readonly firmware_name="$(basename "${input_elf%.elf}")"
-readonly board_name="${firmware_name#kaptan-}"
 readonly output_image="${input_elf%.elf}.bin"
 readonly script_directory="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
 readonly workspace_root="$(cd -- "$script_directory/.." && pwd)"
-readonly memory_x="$workspace_root/boards/$board_name/memory.x"
+readonly memory_x="${2:-$workspace_root/platforms/stm32f7/link/f722/memory.x}"
 readonly host="$(rustc -vV | sed -n 's/^host: //p')"
 readonly llvm_objcopy="$(rustc --print sysroot)/lib/rustlib/$host/bin/llvm-objcopy"
 
@@ -22,7 +20,7 @@ if [[ ! -f "$input_elf" ]]; then
 fi
 
 if [[ ! -f "$memory_x" ]]; then
-    printf 'cannot find the linker layout for board %q: %s\n' "$board_name" "$memory_x" >&2
+    printf 'cannot find linker layout: %s\n' "$memory_x" >&2
     exit 1
 fi
 
@@ -31,6 +29,11 @@ if [[ ! -x "$llvm_objcopy" ]]; then
     exit 1
 fi
 
-"$llvm_objcopy" -O binary "$input_elf" "$output_image"
-printf 'DFU image: %s\n' "$output_image"
 "$script_directory/analyze-fw.py" "$input_elf" "$memory_x"
+
+temporary_image="$(mktemp "${output_image}.tmp.XXXXXX")"
+trap 'rm -f -- "$temporary_image"' EXIT
+"$llvm_objcopy" -O binary "$input_elf" "$temporary_image"
+mv -f -- "$temporary_image" "$output_image"
+trap - EXIT
+printf 'DFU image: %s\n' "$output_image"