Dockerfile不是shell或构建脚本,因此它不会执行您在ARG中传递的内容。有一个解决方法-将版本定义为
ARG
Dockerfile文件:
FROM ubuntu:latest
ARG LATESTWPVER
RUN echo $LATESTWPVER
ADD https://downloads.wordpress.org/release/wordpress-$LATESTWPVER-no-content.zip /var/www/latest.zip
docker build --build-arg LATESTWPVER=`curl -s https://api.wordpress.org/core/version-check/1.5/ | head -n 4 | tail -n 1` .
Sending build context to Docker daemon 6.656kB
Step 1/4 : FROM ubuntu:latest
---> 113a43faa138
Step 2/4 : ARG LATESTWPVER
---> Using cache
---> 64f47dcfe7fa
Step 3/4 : RUN echo $LATESTWPVER
---> Running in eb5fdd005d77
4.9.8
Removing intermediate container eb5fdd005d77
---> 1015629b927e
Step 4/4 : ADD https://downloads.wordpress.org/release/wordpress-$LATESTWPVER-no-content.zip /var/www/latest.zip
Downloading [==================================================>] 7.118MB/7.118MB
---> 72f0d3790e51
Successfully built 72f0d3790e51