'git submodule' [--quiet] update [--init] [-N|--no-fetch] [--rebase]
[--reference <repository>] [--merge] [--] [<path>...]
'git submodule' [--quiet] summary [--cached] [--summary-limit <n>] [commit] [--] [<path>...]
-'git submodule' [--quiet] foreach <command>
+'git submodule' [--quiet] foreach [--recursive] <command>
'git submodule' [--quiet] sync [--] [<path>...]
Any submodules defined in the superproject but not checked out are
ignored by this command. Unless given --quiet, foreach prints the name
of each submodule before evaluating the command.
+ If --recursive is given, submodules are traversed recursively (i.e.
+ the given shell command is evaluated in nested submodules as well).
A non-zero return from the command in any submodule causes
the processing to terminate. This can be overridden by adding '|| :'
to the end of the command.
*NOTE*: Do *not* use this option unless you have read the note
for linkgit:git-clone[1]'s --reference and --shared options carefully.
+--recursive::
+ This option is only valid for the foreach command.
+ Traverse submodules recursively. The operation is performed not
+ only in the submodules of the current repo, but also
+ in any nested submodules inside those submodules (and so on).
+
<path>...::
Paths to submodule(s). When specified this will restrict the command
to only operate on the submodules found at the specified paths.