I have sup别名为submodule foreach 'git co master; git up' (co & up是别名checkout & pull --rebase， 分别。）。
如何添加条件，以便如果子模块名称是Libraries/JSONKit，它检查名为的分支experimental， 代替master?
脚本密码为git submodule运行时其工作目录设置为给定子模块的顶部...因此您可以简单地查看pwd查看您是否在特定的子模块中。但是，如果您花一些时间阅读git submodule文档，事实证明更加容易：
foreach
Evaluates an arbitrary shell command in each checked out submodule. The
command has access to the variables $name, $path, $sha1
and $toplevel: $name is the name of the relevant submodule section in
.gitmodules, $path is the name of the submodule directory
relative to the superproject, $sha1 is the commit as recorded in the superproject,
and $toplevel is the absolute path to the top-level of the superproject.
所以你可以这样做：
git submodule foreach '[ "$path" = "Libraries/JSONKit" ] \
&& branch=experimental \
|| branch=master; git co $branch'
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