bash gitlab ci 脚本在哪个 $? 允许非零
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gitlab ci scripts during which $? is allowed to be non-zero
提问by pseyfert
In our project we have a shell script which is to be sourced to set up environment variables for the subsequent build process or to run the built applications.
在我们的项目中，我们有一个 shell 脚本，用于为后续构建过程设置环境变量或运行构建的应用程序。
It contains a block which checks the already set variables and does some adjustment.
它包含一个检查已经设置的变量并进行一些调整的块。
# part of setup.sh
for LIBRARY in "${LIBRARIES_WE_NEED[@]}"
do
echo $LD_LIBRARY_PATH | \grep $LIBRARY > /dev/null
if [ $? -ne 0 ]
then
echo Adding $LIBRARY
LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$LIBRARY
else
echo Not adding $LIBRARY
fi
done
i.e. it checks if a path to a library is already in $LD_LIBRARY_PATHand if not, adds it.
(To be fair, this could be written differently (like here), but assume the script is supposed to achieve something which is very hard to do without calling a program, checking $?and then either doing one thing or doing another thing).
即它检查库的路径是否已经存在$LD_LIBRARY_PATH，如果没有，则添加它。（公平地说，这可以用不同的方式编写（就像这里），但假设脚本应该实现一些事情，如果不调用程序，检查$?然后做一件事或做另一件事，这是很难做到的）。
The .gitlab-ci.ymlthen contains
该.gitlab-ci.yml则包含
before_script:
- yum install -y <various packages>
- source setup.sh
but the runner decides to stop the before script the very moment $?is non-zero, i.e. when the if-statement decides to add a path to $LD_LIBRARY_PATH.
Now it is nice that the gitlab runner checks $?after each line of my script, but here it'd be great if the lines in .gitlab-ci.ymlwere considered atomic.
但是跑步者决定在$?非零时刻停止 before 脚本，即当 if 语句决定向$LD_LIBRARY_PATH. 现在很高兴 gitlab runner$?在我的脚本的每一行之后检查，但如果这些行.gitlab-ci.yml被认为是原子的，那就太好了。
Is there a way to avoid the intermediate checks of $?in a script that's sourced in .gitlab-ci.yml?
有没有办法避免在$?源自 的脚本中进行中间检查.gitlab-ci.yml？
回答by andlrc
Use command_that_might_fail || trueto mask the exit status of said command.
使用command_that_might_fail || true来掩盖所述命令的退出状态。
Also note that you can use grep -qto prevent output:
另请注意，您可以使用grep -q来防止输出：
echo "$LD_LIBRARY_PATH" | grep -q "$LIBRARY" || true
This will however also mask $?which you might not want. If you want to check if the command exits correct you might use:
然而，这也将掩盖$?您可能不想要的。如果您想检查命令退出是否正确，您可以使用：
if echo "$LD_LIBRARY_PATH" | grep -q "$LIBRARY"; then
echo "Adding $LIBRARY"
else
...
fi
I suspect that gitlab-cisets -ewhich you can disabled with set +e:
我怀疑gitlab-ci套-e，你可以禁用set +e：
set +e # Disable exit on error
for library in "${LIBRARIES_WE_NEED[@]}"; do
...
done
set -e # Enable exit on error
Future reading: Why double quotes matterand Pitfalls with set -e
