To assign the output of a command to the ARG variable in a Dockerfile, you can use the following syntax:
ARG VARIABLE_NAME=$(command)
For example, if you want to assign the output of the date
command to an ARG variable called BUILD_DATE
, you would use:
ARG BUILD_DATE=$(date +%Y-%m-%d)
This will set the value of the BUILD_DATE
ARG variable to the current date in YYYY-MM-DD
format. You can then use this variable in other parts of your Dockerfile, such as in labels or ENV statements.
Asked: 2023-06-07 11:14:13 +0000
Seen: 17 times
Last updated: Jun 07 '23