git-submodule summary: code framework

diff --git a/git-submodule.sh b/git-submodule.sh
index a6aaf40b0ac5b477b73684b5a2b8b7417adaad81..dbb866644a24d587b67b85a3efa8c23e7bef0178 100755 (executable)
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -4,7 +4,7 @@
 #
 # Copyright (c) 2007 Lars Hjemli
 
-USAGE='[--quiet] [--cached] [add <repo> [-b branch]|status|init|update] [--] [<path>...]'
+USAGE='[--quiet] [--cached] [add <repo> [-b branch]|status|init|update|summary [<commit>]] [--] [<path>...]'
 OPTIONS_SPEC=
 . git-sh-setup
 require_work_tree
@@ -320,7 +320,58 @@ set_name_rev () {
        ) )
        test -z "$revname" || revname=" ($revname)"
 }
+#
+# Show commit summary for submodules in index or working tree
+#
+# If '--cached' is given, show summary between index and given commit,
+# or between working tree and given commit
+#
+# $@ = [commit (default 'HEAD'),] requested paths (default all)
+#
+cmd_summary() {
+       # parse $args after "submodule ... summary".
+       while test $# -ne 0
+       do
+               case "$1" in
+               --cached)
+                       cached="$1"
+                       ;;
+               --)
+                       shift
+                       break
+                       ;;
+               -*)
+                       usage
+                       ;;
+               *)
+                       break
+                       ;;
+               esac
+               shift
+       done
 
+       if rev=$(git rev-parse --verify "$1^0" 2>/dev/null)
+       then
+               head=$rev
+               shift
+       else
+               head=HEAD
+       fi
+
+       cd_to_toplevel
+       # Get modified modules cared by user
+       modules=$(git diff-index $cached --raw $head -- "$@" |
+               grep -e '^:160000' -e '^:[0-7]* 160000' |
+               while read mod_src mod_dst sha1_src sha1_dst status name
+               do
+                       # Always show modules deleted or type-changed (blob<->module)
+                       test $status = D -o $status = T && echo "$name" && continue
+                       # Also show added or modified modules which are checked out
+                       GIT_DIR="$name/.git" git-rev-parse --git-dir >/dev/null 2>&1 &&
+                       echo "$name"
+               done
+       )
+}
 #
 # List all submodules, prefixed with:
 #  - submodule not initialized
@@ -362,7 +413,7 @@ cmd_status()
        do
                name=$(module_name "$path") || exit
                url=$(git config submodule."$name".url)
-               if test -z "url" || ! test -d "$path"/.git
+               if test -z "$url" || ! test -d "$path"/.git
                then
                        say "-$sha1 $path"
                        continue;
@@ -391,7 +442,7 @@ cmd_status()
 while test $# != 0 && test -z "$command"
 do
        case "$1" in
-       add | init | update | status)
+       add | init | update | status | summary)
                command=$1
                ;;
        -q|--quiet)
@@ -406,7 +457,7 @@ do
                branch="$2"; shift
                ;;
        --cached)
-               cached=1
+               cached="$1"
                ;;
        --)
                break
@@ -430,8 +481,8 @@ then
        usage
 fi
 
-# "--cached" is accepted only by "status"
-if test -n "$cached" && test "$command" != status
+# "--cached" is accepted only by "status" and "summary"
+if test -n "$cached" && test "$command" != status -a "$command" != summary
 then
        usage
 fi