use env variable in strategy matrix #56787
Replies: 6 comments 7 replies
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You can't, the
A job output would work there. Small catch: The value of an output is a string. If you want to define an array from it, that string must be valid JSON defining the array. Then use |
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Thanks for the reply.
But then again what's the use if I have to repeat the code instead of defining it at one place(that I thought would be environment variables) and moreover the string which I want to mention will not be generated as an output, that will more like user-defined value.
Is there any other way in which I can achieve it, that is, just mention that string(may we can convert it to json later-on in your code, like you suggested) once in the code and use it in strategy matrix?
2 questions:
Can I convert the string value of an env variable to json like you showed and use it in strategy tag?
You said we can use env variable anywhere except id and uses keys, why can't we use it in strategy tag?
Thanks,
Shreyans Bhardwaj
Linux System Administrator
From: Airtower ***@***.***>
Sent: Wednesday, May 31, 2023 1:07 AM
To: community/community ***@***.***>
Cc: Shreyans Bhardwaj ***@***.***>; Author ***@***.***>
Subject: Re: [community/community] use env variable in strategy matrix (Discussion #56787)
You can't, the env context documentation<https://docs.github.com/en/actions/learn-github-actions/contexts#env-context> describes it pretty clearly:
You can use the env context in the value of any key in a step except for the id and uses keys.
A job output would work there. Small catch: The value of an output is a string. If you want to define an array from it, that string must be valid JSON defining the array. Then use fromJSON()<https://docs.github.com/en/actions/learn-github-actions/expressions#fromjson> to turn the JSON into an actual array (see the examples behind that link).
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Where it is available, yes.
You missed an important part of the quote: anywhere in a step. So only within the
With the method I described above: By adding a job that creates the string as an output. Ironically the step within that job that sets the output could copy it from |
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I have one more doubt, the attached screenshot is the summary of my workflow: One problem I am facing now is, that I can’t re-trigger the whole 3rd and 4th job separately, instead I can just trigger one matrix job within it. Am I making any coding mistakes in the workflow, let me know in case you want more information. |
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@airtower-luna can you please help on this? |
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@sg-sbhardwa Community members are encouraged to help one another--however, please respect folks' time and refrain from tagging individuals as they are helping when and where they can. |
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I still have not got any reply on it, what should I do ? |
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Work it out for yourself? If you only want to retrigger one thing, you'd have to add some condition somewhere that you can influence, whether it be a url, or a dns entry, or a github tag. |
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Note that generally if you go into a job view, you can hover over a list of jobs on the left and click the Or, you could go into a job run that would start the cascade you want and click the same icon at the top right of the log: |
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kind of weird that this is not possible in 2024. i have several jobs that should use the same strategy. what is an easy way to define the strategy once and reuse it across jobs? |
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Create a job that constructs a string containing json as an output and then have multiple jobs that declare |
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i know this is possible. still, so many additional lines ( |
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Hi, I have trying to resolve an issue with github actions workflow, can I give an env variable in strategy matrix instead of mentioning it explicitly in the matrix. e.g instead of this:
jobs:
Backup_ServerCopy:
runs-on: [self-hosted]
needs: Clone
strategy:
matrix:
vhost_loop: [abc.com,xyz.com]
steps:
- run: <command#1 taking matrix.vhost_loop as an argument>
- run: <command#2 taking matrix.vhost_loop as an argument>
if I can some how use it like this:
env:
vhosts: [abc.com,xyz.com]
jobs:
Backup_ServerCopy:
runs-on: [self-hosted]
needs: Clone
strategy:
matrix:
vhost_loop: ${{ env.vhosts }}
steps:
- run: <command#1 taking matrix.vhost_loop as an argument>
- run: <command#2 taking matrix.vhost_loop as an argument>
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