docker/cli
1
0
Fork 0
mirror of https://github.com/docker/cli.git synced 2025-07-29 06:01:13 +03:00
Code Activity

Merge pull request #970 from cowlinator/temp2

Browse Source 
Clarify --build-arg documentation
This commit is contained in:
Sebastiaan van Stijn
2018-04-13 18:54:16 -07:00
committed by GitHub
parent 6b31ea0f0d ad44e2d45e
commit e5980c541a
1 changed files with 2 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
docs/reference/commandline/build.md
View File

@ -411,13 +411,13 @@ files. The `ARG` instruction lets Dockerfile authors define values that users
can set at build-time using the `--build-arg` flag:
```bash
$ docker build --build-arg HTTP_PROXY=http://10.20.30.2:1234 .
$ docker build --build-arg HTTP_PROXY=http://10.20.30.2:1234 --build-arg FTP_PROXY=http://40.50.60.5:4567 .
```
This flag allows you to pass the build-time variables that are
accessed like regular environment variables in the `RUN` instruction of the
Dockerfile. Also, these values don't persist in the intermediate or final images
like `ENV` values do.
like `ENV` values do. You must add `--build-arg` for each build argument.
Using this flag will not alter the output you see when the `ARG` lines from the
Dockerfile are echoed during the build process.