Catch npm ERR! when running npm test from shell script

Question

I have a shell script that recursively searches for package.json from a base directory and runs npm test like so.

find "$parent_dir" -name package.json -maxdepth 2 -execdir npm test \;

I want to intercept tests failure in the form of:

npm ERR! Test failed.  See above for more details.
npm ERR! not ok code 0

So I can have the shell script exit with an error status.

Any help is appreciated.

just found this question, which is similar to mine. Two years and no answers... — Felipe
– Felipe, Commented Jun 3, 2018 at 0:13
There is a related question that may solve this problem here stackoverflow.com/questions/17830326/… — EGS
– EGS, Commented Sep 2, 2020 at 10:55
Does this answer your question? Ignoring specific errors in a shell script — EGS
– EGS, Commented Sep 2, 2020 at 11:04

Han · Accepted Answer · 2020-01-13 02:51:08Z

7

Another 3 year late and was looking for solution in this too.

Finally found it and if these help others in future. I used shell script $? command, which returns the exit status of the last executed command. I.e. if a shell script fails it returns 1 while a 0 if it's success. NPM implements this return hence.

npm run test
if [ $? -eq 0 ]
then
  echo "SUCCESS"
else
  echo "FAIL"
fi

answered Jan 13, 2020 at 2:51

Han

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EGS Over a year ago

This did not worked for me. The script kept breaking at the line of the test. I finally solved with the answer from this question: stackoverflow.com/questions/17830326/…

Delmys Asteroraena · Accepted Answer · 2018-06-12 23:33:49Z

1

If I understood you correctly you want to execute something or stop execution of script if npm ERR! has been thrown? This might help:

 if ./somecommand | grep -q 'npm ERR!'; then
      #what you want to do
      # exit executing the script
      return
    fi

Sorry what I am two years late, just joined the SO community.

answered Jun 12, 2018 at 23:33

Delmys Asteroraena

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