env_file not able to parse spaces

[altsalt]

Currently, there appears to be no way to add a space character to an env_file entry.

Here are some of the combinations I have tried:

VAR=foo bar
VAR=foo\ bar
VAR='foo bar'
VAR="foo bar"
VAR='foo\ bar'
VAR={foo bar}
"VAR='foo bar'"
'VAR="foo bar"'
VAR=foo%20bar
VAR=foo bar
etc ...

I am using Docker 1.10.3 and Compose 1.7.0

This issue seems to be directly related to moby/moby#12997 which looked to be closed unsatisfactorily.

Another related issue may be: #2854

Any fix or work-around would be appreciated.

Thanks!

[dnephin]

My understanding is that the first one should work. The quotes will be taken literally, so nothing with quotes will be correct.

[altsalt]

Unfortunately it just ends up as VAR=foo

[dnephin]

$ docker run -ti --env-file envs alpine:3.3 env
WITH_SPACE=foo bar
WITH_ESCAPE=foo\ bar

$ docker-compose up
Creating network "envfile_default" with the default driver
Creating envfile_web_1
Attaching to envfile_web_1
web_1  | WITH_ESCAPE=foo\ bar
web_1  | WITH_SPACE=foo bar
envfile_web_1 exited with code 0

Seems to work for me with both space and backslash. I suspect the issue is in the script you're using to consume the variable.

[junneyang]

so, what's the solution?

[takano32]

@junneyang
this issue may be duped with #2854 .