docker - Dockerfile: Copied file not found -

i'm trying add shell script container, , run part of build.

here's relevant section of dockerfile:

#phantomjs install copy conf/phantomjs.sh ~/phantomjs.sh run chmod +x ~/phantomjs.sh && ~/phantomjs.sh 

and here's output during build:

step 16 : copy conf/phantomjs.sh ~/phantomjs.sh  ---> using cache  ---> 8199d97eb936 step 17 : run chmod +x ~/phantomjs.sh && ~/phantomjs.sh  ---> running in 3c7ecb307bd3 [91mchmod: [0m[91mcannot access '/root/phantomjs.sh'[0m[91m: no such file or directory[0m[91m 

the file i'm copying exists in conf folder underneath build directory... whatever doesn't seem copied across.

tl;dr

don't rely on shell expansions ~ in copy instructions. use copy conf/phantomjs.sh /path/to/user/home/phantomjs.sh instead!

detailed explanation

using ~ shortcut user's home directory feature offered shell (i.e. bash or zsh). copy instructions in dockerfile not run in shell; take file paths argument (also see manual).

this issue can reproduced minimal dockerfile:

from alpine copy test ~/test 

then build , run:

$ echo foo > test $ docker built -t test $ docker run --rm -it test /bin/sh 

when running ls -l / inside container, you'll see docker build did not expand ~ /root/, created directory named ~ file test in it:

/ # ls -l /~/test.txt  -rw-r--r--    1 root     root             7 jan 16 12:26 /~/test.txt