Fix capture-build-details.sh to work with detached state or tags

Co-Authored-By: Jonas Björkert <bjorkert@users.noreply.github.com>

scripts/capture-build-details.sh

@@ -1,27 +1,22 @@
 #!/bin/sh -e
-
 #  capture-build-details.sh
 #  Trio
 #
 #  Created by Jonas Björkert on 2024-05-08.
-
 # Enable debugging if needed
 #set -x
-
 info_plist_path="${BUILT_PRODUCTS_DIR}/${CONTENTS_FOLDER_PATH}/BuildDetails.plist"
-
 # Ensure the path to BuildDetails.plist is valid.
 if [ "${info_plist_path}" == "/" -o ! -e "${info_plist_path}" ]; then
     echo "BuildDetails.plist file does not exist at path: ${info_plist_path}" >&2
     exit 1
 else
     echo "Gathering build details..."
-
     # Capture the current date and write it to BuildDetails.plist
     plutil -replace com-trio-build-date -string "$(date)" "${info_plist_path}"
 
-    # Retrieve the current branch
-    git_branch=$(git symbolic-ref --short -q HEAD)
+    # Retrieve the current branch, if available
+    git_branch=$(git symbolic-ref --short -q HEAD || echo "")
 
     # Attempt to retrieve the current tag
     git_tag=$(git describe --tags --exact-match 2>/dev/null || echo "")
@@ -29,12 +24,15 @@ else
     # Retrieve the current SHA of the latest commit
     git_commit_sha=$(git log -1 --format="%h" --abbrev=7)
 
-    # Determine the branch or tag information
+    # Determine the branch or tag information, or fallback to SHA if in detached state
     git_branch_or_tag="${git_branch:-${git_tag}}"
+    if [ -z "${git_branch_or_tag}" ]; then
+        git_branch_or_tag="detached"
+    fi
 
     # Update BuildDetails.plist with the branch or tag information
     plutil -replace com-trio-branch -string "${git_branch_or_tag}" "${info_plist_path}"
 
     # Update BuildDetails.plist with the SHA information
     plutil -replace com-trio-commit-sha -string "${git_commit_sha}" "${info_plist_path}"
-fi
+fi