Inserting a conditional RUN statement inside a dockerfile

Question

I am trying to write a docker file which will run a RUN command to search for a word in a package.json file and act upon it:

this is my simple dockerfile:

FROM ubuntu:14.04  COPY package.json package.json  RUN if grep -q "grunt" package.json; then echo succeed fi 

as you can see i just want a simple if statement but it get this error:

Step 2 : RUN if grep -q "grunt" package.json; then echo succeed fi  ---> Running in af460df45239 /bin/sh: 1: Syntax error: end of file unexpected (expecting "fi") INFO[0001] The command [/bin/sh -c if grep -q "grunt" package.json; then echo succeed fi] returned a non-zero code: 2 

How should i run my command? thanks.

Answer 1

Just like when typing at the shell, you need either a newline or a semicolon before fi:

RUN if grep -q "grunt" package.json; then echo succeed; fi                                              add this ^