bash 在非零退出后使用“git submodule foreach”命令继续循环子模块

Continue looping over submodules with the "git submodule foreach" command after a non-zero exit

提问by Casey Flynn

I have a project that contains many submodules. I want to loop over each submodule with the following command:

我有一个包含许多子模块的项目。我想使用以下命令遍历每个子模块：

git submodule foreach npm install

git submodule foreach npm install

And I want the script to continue looping over each submodule even if one submodule returns an error (non zero return code). Currently, a non-zero return code from running this command in any submodule will cause git to stop looping over the remaining submodules.

而且我希望脚本继续循环遍历每个子模块，即使一个子模块返回错误（非零返回代码）。目前，在任何子模块中运行此命令的非零返回码将导致 git 停止在其余子模块上循环。

Any recommendations on how to accomplish this?

关于如何实现这一点的任何建议？

回答by gniourf_gniourf

Just make your command always return a 0code like so:

只需让您的命令始终返回如下0代码：

git submodule foreach 'npm install || :'

This is taken from the manual: git help submodule:

这是从手册中获取的git help submodule：：

   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. 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.

       As an example, git submodule foreach 'echo $path `git rev-parse
       HEAD`' will show the path and currently checked out commit for each
       submodule.

The command :from help :in bash:

:来自help :in的命令bash：

:: :
    Null command.

    No effect; the command does nothing.

    Exit Status:
    Always succeeds.

Always succeeds:)

总是成功:)

回答by Idriss Neumann

You could see this topic.

你可以看到这个话题。

I don't use GIT, but if you can locate the .gitmodules files, it may be easy to loop for each submodules :

我不使用 GIT，但是如果您可以找到 .gitmodules 文件，则可能很容易为每个子模块循环：

<command to find all of your submodules>|while read; do
    # ... (default use $REPLY as an item)
done

Or :

或者 ：

while read; do
    # ...
done <<< "$(command to find all of your submodules)"

See this reminder on how to read a command output with a loop in Bash.

请参阅有关如何在 Bash 中使用循环读取命令输出的提示。