I have a shell script where I am running a multiline command to fetch version from our UI.
Command I am using is:
var=$(curl -k myurl| awk something | sed something)
Then I am using the var for further validations.
The above shell is not promoting the correct response. I checked running this in my terminal and command seems fine but this is not working with Jenkins.
Can someone please help me to understand how to solve this issue.
I have gone through multiple posts but no help.
As you mentioned, it is working on your terminal, then it should also work on your Jenkins shell, can you be more brief by sharing the error or difference in response you are getting ,
But anyways as an alternative to this, you can save your shell command in a script file, and execute it using Jenkins.
I encounter the issue that I have a parameterized project with several string parameters, e.g., "VARIABLE_A", and that Jenkins doesn't know them anymore when executing a shell script in the Build section, i.e., there is simply no value.
This is very bizarre and I am convinced this should work using a string parameter (variable) in these ways:
"echo $VARIABLE_A"
"python3 $PATH/abc.py $VARIABLE_A"
...
but there is no values anymore.
echo-command does not print anything and the Python script misses the value as VARIABLE_A is apparently empty.
Perhaps someone has an idea ?
Thanks
Rainer
PS
Jenkins version is "2.277.2".
I have a variable $svn_tag in a Jenkins job.
Its value is branches/sprint-77.
I want the output branches-sprint-77, but I didn't get any output.
I tried these two methods:
$svn_tag|tr "/" -
${svn_tag////-}
It is giving output in bash script, but it is not working in the Jenkins job.
What am I doing wrong?
Your first approach does not make sense, not the least because you try to run `$svn_tag´ as a command. Your second approach works for me:
svn_tag=branches/sprint-77
echo ${svn_tag////-}
prints branches-sprint-77.
For the safe side, you could also check your bash version, by doing a
echo bash=$BASH_VERSION
though I don't think that this feature is version-dependent. Mine is 4.4.12(3)-release.
Use code like below
${svn_tag.replaceAll('/', '-')}
I have a bash script that executes a series of commands, some involving redirection. See cyrus-mark-ham-spam.
I want the script to have a test mode, where all the commands run are printed instead of executing them. As you can see, I have tried to do that by just putting "echo" on the front of each command in test mode.
Unfortunately this doesn't deal with redirection - any redirections are still done, so the program leaves lots of temp files littered about the place when run in test mode.
I have tried various ways to get round this, like quoting the whole command and passing it to a function that either prints it or runs it, but either the redirections work in test mode, or they don't work in run mode.
I thought this must have come up before, and wonder if there is a known solution which does not involve every command being repeated with an if TEST round the pair?
Please note, this is NOT a duplicate of show commands without executing them because neither that question, nor its answers, covers redirection (which is the essence of this question).
I see that it is not a duplicate but there is not general solution to this. You need to look at each command separately.
As long as the command doesn't use arguments enclosed in spaces, like
cmd -a -b -c > filename
, you can quote it:
echo 'cmd -a -b -c > filename'
But real life code is more complex, sure.
The horror stories I found while searching for an answer for this one...
OK, I have a .sh script which pretty much does everything Jenkins supposed to do:
checks out sources from SVN
build the project
deploys the project
cleans after itself
So in Jenkins I only have to 'build' the project by running the script in an Execute Shell command.
The script is ran (the sources are downloaded, the project is build/deploy) but then it marks the build as a failure:
Build step 'Execute shell' marked build as failure
Even if the script was successfully ran! I tried closing the script with:
exit 0 (still marks it as failure)
exit 1 (marks it as failure, as expected)
no exit command at all (marks it as failure)
When, how and why does Execute Shell mark my build as a failure?
First things first, hover the mouse over the grey area below. Not part of the answer, but absolutely has to be said:
If you have a shell script that does "checkout, build, deploy" all by itself, then why are you using Jenkins? You are foregoing all the features of Jenkins that make it what it is. You might as well have a cron or an SVN post-commit hook call the script directly. Jenkins performing the SVN checkout itself is crucial. It allows the builds to be triggered only when there are changes (or on timer, or manual, if you prefer). It keeps track of changes between builds. It shows those changes, so you can see which build was for which set of changes. It emails committers when their changes caused successful or failed build (again, as configured as you prefer). It will email committers when their fixes fixed the failing build. And more and more. Jenkins archiving the artifacts also makes them available, per build, straight off Jenkins. While not as crucial as the SVN checkout, this is once again an integral part of what makes it Jenkins. Same with deploying. Unless you have a single environment, deployment usually happens to multiple environments. Jenkins can keep track of which environment a specific build (with specific set of SVN changes) is deployed it, through the use of Promotions. You are foregoing all of this. It sounds like you are told "you have to use Jenkins" but you don't really want to, and you are doing it just to get your bosses off your back, just to put a checkmark "yes, I've used Jenkins"
The short answer is: the exit code of last command of the Jenkin's Execute Shell build step is what determines the success/failure of the Build Step. 0 - success, anything else - failure.
Note, this is determining the success/failure of the build step, not the whole job run. The success/failure of the whole job run can further be affected by multiple build steps, and post-build actions and plugins.
You've mentioned Build step 'Execute shell' marked build as failure, so we will focus just on a single build step. If your Execute shell build step only has a single line that calls your shell script, then the exit code of your shell script will determine the success/failure of the build step. If you have more lines, after your shell script execution, then carefully review them, as they are the ones that could be causing failure.
Finally, have a read here Jenkins Build Script exits after Google Test execution. It is not directly related to your question, but note that part about Jenkins launching the Execute Shell build step, as a shell script with /bin/sh -xe
The -e means that the shell script will exit with failure, even if just 1 command fails, even if you do error checking for that command (because the script exits before it gets to your error checking). This is contrary to normal execution of shell scripts, which usually print the error message for the failed command (or redirect it to null and handle it by other means), and continue.
To circumvent this, add set +e to the top of your shell script.
Since you say your script does all it is supposed to do, chances are the failing command is somewhere at the end of the script. Maybe a final echo? Or copy of artifacts somewhere? Without seeing the full console output, we are just guessing.
Please post the job run's console output, and preferably the shell script itself too, and then we could tell you exactly which line is failing.
Simple and short answer to your question is
Please add following line into your "Execute shell" Build step.
#!/bin/sh
Now let me explain you the reason why we require this line for "Execute Shell" build job.
By default Jenkins take /bin/sh -xe and this means -x will print each and every command.And the other option -e, which causes shell to stop running a script immediately when any command exits with non-zero (when any command fails) exit code.
So by adding the #!/bin/sh will allow you to execute with no option.
In my opinion, turning off the -e option to your shell is a really bad idea. Eventually one of the commands in your script will fail due to transient conditions like out of disk space or network errors. Without -e Jenkins won't notice and will continue along happily. If you've got Jenkins set up to do deployment, that may result in bad code getting pushed and bringing down your site.
If you have a line in your script where failure is expected, like a grep or a find, then just add || true to the end of that line. That ensures that line will always return success.
If you need to use that exit code, you can either hoist the command into your if statement:
grep foo bar; if [ $? == 0 ]; then ... --> if grep foo bar; then ...
Or you can capture the return code in your || clause:
grep foo bar || ret=$?
I 've tried all mentioned options (even changing sh to bash without -xe params), the only one option worked for me is:
<command-which-returns-not-zero> || exit 0
Plain and simple:
If Jenkins sees the build step (which is a script too) exits with non-zero code, the build is marked with a red ball (= failed).
Why exactly that happens depends on your build script.
I wrote something similar from another point-of-view but maybe it will help to read it anyway:
Why does Jenkins think my build succeeded?
So by adding the #!/bin/sh will allow you to execute with no option.
It also helped me in fixing an issue where I was executing bash script from Jenkins master on my Linux slave. By just adding #!/bin/bash above my actual script in "Execute Shell" block it fixed my issue as otherwise it was executing windows git provided version of bash shell that was giving an error.
Try and always find where exactly its failing by adding the following line into your "Execute shell" Build step.
#!/bin/sh -xe
By adding the -x you will print each and every command that ran (including the lines from embedded scripts) and that will help in spotting the root cause.
Removing the -e option i.e. running #!/bin/sh will allow you to execute with no option, which is really a bad idea as Bryan explained well in one of the answers.
The problem is with no option Jenkins will ignore errors and continue execution of subsequent steps (if there are any) which will leave your process in an consistent state. If this is for a production build or deployment, that may have a bad impact.
Once you find the problem area, run the same failing command from the directory as jenkins-user manually, to get to the exact error/rootcause.
In Jenkins ver. 1.635, it is impossible to show a native environment variable like this:
$BUILD_NUMBER or ${BUILD_NUMBER}
In this case, you have to set it in an other variable.
set BUILDNO = $BUILD_NUMBER
$BUILDNO