Adding dynamically an object to a json file using jq in a bash script-CodePudding

Im trying to build dynamically a json using a bash script with a loop inside:

touch credScanSuppressionsFile.json
echo '{"tool": "Credential Scanner", "suppressions":[]}' | jq > credScanSuppressionsFile.json

webapp_name=customer-brasil-forms

for env in develop #staging demo preprod prod
do
    file='azure_portal_variables\'$env-$webapp_name.json
    echo $file
    jq --arg file $file '.suppressions  = [{"file": $file, "_justification": "app setting file"}]' <<< "$(cat credScanSuppressionsFile.json)" > credScanSuppressionsFile.json
done

Everything looks like its working... but when you see the output:

{
  "tool": "Credential Scanner",
  "suppressions": [
    {
      "file": "azure_portal_variables\\develop-customer-brasil-forms.json",
      "_justification": "app setting file"
    }
  ]
}

The desire output should be (be aware of the filename with double slash):

{
  "tool": "Credential Scanner",
  "suppressions": [
    {
      "file": "azure_portal_variables\develop-customer-brasil-forms.json",
      "_justification": "app setting file"
    }
  ]
}

CodePudding user response：

Please do the shellcheck as I recommended you to here

$ shellcheck myscript
 
Line 8:
for env in develop #staging demo preprod prod
           ^-- SC2043 (warning): This loop will only ever run once. Bad quoting or missing glob/expansion?
 
Line 10:
    file='azure_portal_variables\'$env-$webapp_name.json
                                ^-- SC1003 (info): Want to escape a single quote? echo 'This is how it'\''s done'.
 
Line 12:
    jq --arg file $file '.suppressions  = [{"file": $file, "_justification": "app setting file"}]' <<< "$(cat credScanSuppressionsFile.json)" > credScanSuppressionsFile.json
>>                                                                                                            ^-- SC2094 (info): Make sure not to read and write the same file in the same pipeline.
>>                                                                                                                                              ^-- SC2094 (info): Make sure not to read and write the same file in the same pipeline.

$

Once you have fixed all the shell issues, then we can start helping you about the jq issue.

CodePudding user response：

Finally, the chosen code, at least a valid one for my case, is:

touch credScanSuppressionsFile.json
echo '{"tool": "Credential Scanner", "suppressions":[]}' | jq > credScanSuppressionsFile.json

webapp_name=customer-brasil-forms

for env in develop #staging demo preprod prod
do
    file=$env-$webapp_name.json
    echo $file
    jq --arg file $file '.suppressions  = [{"file": $file, "_justification": "app setting file"}]' <<< "$(cat credScanSuppressionsFile.json)" > credScanSuppressionsFile.json
done

I have realised that just using the name of the file is enough.

Things to highlight is that @Armali is right, the json as it was (my supposed wrong result) is correct and the backslash should be scaped with double backslash and @LeaGris thanks for your help, but the code was correct after the edition, the errors you see its just info in case you want to use it.

touch credScanSuppressionsFile.json
echo '{"tool": "Credential Scanner", "suppressions":[]}' | jq > credScanSuppressionsFile.json

webapp_name=customer-brasil-forms

for env in develop staging demo preprod prod
do
    file='azure_portal_variables\'$env-$webapp_name.json
    echo $file
    jq --arg file $file '.suppressions  = [{"file": $file, "_justification": "app setting file"}]' <<< "$(cat credScanSuppressionsFile.json)" > credScanSuppressionsFile.json
done

This code is also correct