bash脚本中的源文件 [英] Source files in a bash script

问题描述

我正在使用彼此相邻的两个版本的ROS.要使用它，我必须为特定版本提供一些环境变量.我想创建一个执行此操作的脚本. 但是，如果我像下面那样创建脚本，则未设置变量，它们可能是在子shell中设置的.如何将文件来源到主终端外壳?

I am using two versions of ROS next to each other. To use one I have to source some environment variables for the specific version. I would like to create a script that does this. But if I create a script like below the variables are not set, they are probably set in a subshell. How can I source the files to the main terminal shell?

source.sh:

source.sh:

source /opt/ros/fuerte/setup.bash;
source  ~/fuerte_workspace/setup.bash;

这是我如何调用source.sh:

Here is how i am calling source.sh:

./source.sh
# This does not echo anything, but I expect it should
echo $ros_config

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更新:通过按照答案中的建议来源source.sh，我现在可以看到设置的变量.

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Update: By sourcing source.sh as suggested in the answer, I can now see the variables being set.

source ./source.sh
# This works now
echo $ros_config

推荐答案

使用执行Shell脚本. ./(点空格点斜杠)

当使用dot space dot slash执行shell脚本时，如下所示，它将在当前shell中执行脚本，而不会派生子shell.

While executing the shell script using "dot space dot slash", as shown below, it will execute the script in the current shell without forking a sub shell.

$ . ./setup.bash

换句话说，这将在当前shell中执行setup.bash中指定的命令，并为您准备环境.

In other words, this executes the commands specified in the setup.bash in the current shell, and prepares the environment for you.

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