Hi We want to run a `bash command solid` inside a `composit

Question

Hi We want to run a `bash command solid` inside a `composit solid` and need to set a dependancy between the output of the bash command and another solid in the `pipeline` We are not able to get an output from the bash command solid What would be the correct approach for such task While researching this issue I m trying to understand the <https github com dagster io dagster blob master python modules libraries dagster bash dagster bash tests example bash script solid py 9|bash script solid> test example can you get the return from the bash script what does the following line do in the pipeline gt a

sephi · Answer

This is gist of the pipeline that we want to try and run ```from dagster bash import bash script solid from dagster import file relative path pipeline composite solid composite solid def composite bash a = bash script solid file relative path file hello world sh name= my script return a solid def print string str print print str print composite solid def composite print str to print print string str to print pipeline def pip a = composite bash composite print a ``` But this is a non starter since there is an issue with the input output of the `composit solid` gt composite solid composite bash returned problematic value of type lt class dagster core definitions solid SolidDefinition gt Expected return value from invoked solid or dict mapping output name to return values from invoked solids

alex · Answer

`bash script solid` is actually a solid factory so what may fix it for you is just adding ` ` to invoke the solid ``` a = bash script solid file relative path file hello world sh name= my script ```

sephi · Answer

Thx < alex> Now the sample code is running without any errors but nothing is printed out If I understand the code correctly there is no option to receive an output from `bash script solid` Here is the updated code ```from dagster bash import bash script solid from dagster import file relative path pipeline composite solid solid composite solid def composite bash gt str a = bash script solid file relative path file hello world sh name= my script return a solid def print string context str print print str print composite solid def composite print str to print print string str to print pipeline def pip a = composite bash composite print a ```

sephi · Answer

If we still would need to set a dependency between composite bash and composite print would you use `Nothing` or is there another option

alex · Answer

hmm the solid that the `bash script solid` returns returns its output so what you have should work

alex · Answer

how are you executing this

alex · Answer

you may want to switch from `print` to `<http context log info|context log info>` if you want to see the entry in the event stream

sephi · Answer

Thx Now it works I forgot to run `execute pipeline`

sephi · Answer

Assuming we would want to log materialize some of the processes 1 how would you suggest to do so if we are using `bash coommand solid` 2 should we go down the route that < Tobias Macey> did and work directly with `execute`

alex · Answer

gt log materialize some of the processes I dont quite understand what you mean here but I am guessing yes to use an approach of building the solid you need from the building blocks in the dagster bash library

sephi · Answer

thx

Harry Nguyen · Answer

< alex> is there anyway that we get the output from `print` I m debugging code in another module which does not have access to context

alex · Answer

you should be able to see it in stdout stderr of where ever the process is running