Take submodules into account for calculating repo checksums.

law/contrib/git/scripts/repository_checksum.sh

@@ -1,12 +1,14 @@
 #!/usr/bin/env bash
 
 # Computes a checksum of a git repository considering
-# 1. the current revision,
-# 2. the current diff, and
-# 3. the content of new files.
+#   1. the current revision,
+#   2. the current diff, and
+#   3. the content of new files
+# of the repository itself and optionally all of its submodules.
 
 # Arguments:
-# 1. the path to the repository
+# 1. path to the repository
+# 2. (optional) recursive flag ("0" or "1"), defaults to "1"
 
 action() {
     local shell_is_zsh=$( [ -z "${ZSH_VERSION}" ] && echo "false" || echo "true" )
@@ -18,6 +20,7 @@ action() {
 
     # handle arguments
     local repo_path="$1"
+    local recursive="${2:-1}"
     if [ -z "${repo_path}" ]; then
         >&2 echo "please provide the path to the repository to bundle"
         return "1"
@@ -28,11 +31,15 @@ action() {
         return "2"
     fi
 
-    ( \
+    (
         cd "${repo_path}" && \
         git rev-parse HEAD && \
         git diff && \
-        ( git ls-files --others --exclude-standard | xargs cat ) \
+        git ls-files --others --exclude-standard | xargs cat; \
+        [ "${recursive}" = "1" ] && git submodule foreach --recursive --quiet "\
+            git rev-parse HEAD && \
+            git diff && \
+            git ls-files --others --exclude-standard | xargs cat";
     ) | shasum | cut -d " " -f 1
     local ret="$?"