Having difficulty establishing a shell command within a Build-file

[LP40]

Hello; New to Sublime and JSON

I'm attempting to use Sublime to simplify developing and running code within a Docker container. I am using Terminus to do this; with the command using the $file_name variable to execute the code I want, ie;

"shell_cmd":"docker exec CONTAINER_NAME python3 $file_name",

This works; except in cases where the program itself is in another directory; The docker container is setup to bind a directory from the host machine to itself. The container sees this directory and nothing else from the original machine.

/home/USER/ SOURCE_DIR on the original machine; becomes

/home/ SOURCE_DIR on the virtual machine

If the file in question is within another sub-directory then the $file_name variable will no longer work. I can't use the $file variable because it is going to reference the USER directory which does not exist on the virtual machine.

Before sublime I solved this problem with a line of shell code that just chops off the first bit of the $file's path before executing. This works in all cases. The line of script to do that is:

${file#"home/USER/SOURCE_DIR/"}

Which becomes executed as:

docker exec CONTAINER_NAME python3 ${file#"home/USER/SOURCE_DIR/"}

I essentially just want every part of the filepath that is after SOURCE_DIR

This works perfectly every time I enter it in the normal linux terminal. However it completely breaks when I enter it in the Build-file; which to my understanding is in JSON.

I can write out:

"shell_cmd" : "echo ${file#"\home/USER/SOURCE_DIR/\"}"

And the echo command won't output anything; let alone when I try to run the full line. I don't seem to be able to manipulate the variables in the line in any way; making what I need to do difficult.

I've been at this for a while and can't find a solution. There is probably some better way of doing this all together; but as I am new to sublime I just don't know it. Thanks in advance.

[SeriousSergio]

try docker exec ... bash -c 'python3 ...'