Add ability to retain debuginfo before stripping binaries

Author: brancz

.github/.cspell/project-dictionary.txt

@@ -3,3 +3,7 @@ gtar
 lipo
 mktemp
 tmpdir
+DEBUGINFO
+debuginfo
+debuginfos
+objcopy

action.yml

@@ -68,6 +68,10 @@ inputs:
     description: The cargo profile to build. This defaults to the release profile.
     required: false
     default: 'release'
+  split_debuginfo:
+    description: Split debuginfos off of the production binary using objcopy before stripping.
+    required: false
+    default: 'false'
 
 # TODO: allow kebab-case input option names?
 # Note:
@@ -95,3 +99,4 @@ runs:
         INPUT_TOKEN: ${{ inputs.token }}
         INPUT_REF: ${{ inputs.ref }}
         INPUT_PROFILE: ${{ inputs.profile }}
+        INPUT_SPLIT_DEBUGINFO: ${{ inputs.split_debuginfo }}

main.sh

@@ -47,6 +47,13 @@ elif [[ ! "${INPUT_ZIP}" =~ ^(all|unix|windows|none)$ ]]; then
     bail "invalid input 'zip': ${INPUT_ZIP}"
 fi
 
+split_debuginfo="${INPUT_SPLIT_DEBUGINFO:-}"
+case "${split_debuginfo}" in
+    true) split_debuginfo="1" ;;
+    false) split_debuginfo="" ;;
+    *) bail "'split_debuginfo' input option must be 'true' or 'false': '${split_debuginfo}'" ;;
+esac
+
 leading_dir="${INPUT_LEADING_DIR:-}"
 case "${leading_dir}" in
     true) leading_dir="1" ;;
@@ -245,6 +252,11 @@ build() {
 do_strip() {
     target_dir="$1"
     if [[ -n "${strip:-}" ]]; then
+        if [[ -n "${split_debuginfo}" ]]; then
+            for bin_exe in "${bins[@]}"; do
+                x objcopy --only-keep-debug "${target_dir}/${bin_exe}" "${target_dir}/${bin_exe}.debug"
+            done
+        fi
         for bin_exe in "${bins[@]}"; do
             x "${strip}" "${target_dir}/${bin_exe}"
         done