Merge pull request #27256 from givensuman/T-27065-add-quadlet-build-args-support

Add BuildArg key to quadlets

docs/source/markdown/podman-systemd.unit.5.md

@@ -1715,6 +1715,7 @@ Valid options for `[Build]` are listed below:
 | Annotation=annotation=value         | --annotation=annotation=value               |
 | Arch=aarch64                        | --arch=aarch64                              |
 | AuthFile=/etc/registry/auth\.json   | --authfile=/etc/registry/auth\.json         |
+| BuildArg=foo=bar                    | --build-arg foo=bar                         |
 | ContainersConfModule=/etc/nvd\.conf | --module=/etc/nvd\.conf                     |
 | DNS=192.168.55.1                    | --dns=192.168.55.1                          |
 | DNSOption=ndots:1                   | --dns-option=ndots:1                        |
@@ -1757,6 +1758,14 @@ Path of the authentication file.
 
 This is equivalent to the `--authfile` option of `podman build`.
 
+### `BuildArg=`
+
+Specifies a build argument and its value in the same way environment variables are
+(e.g., env=*value*), but it is not added to the environment variable list in the
+resulting image's configuration. Can be listed multiple times.
+
+This is equivalent to the `--build-arg` option of `podman build`.
+
 ### `ContainersConfModule=`
 
 Load the specified containers.conf(5) module. Equivalent to the Podman `--module` option.
@@ -2281,7 +2290,7 @@ Yaml=/opt/k8s/deployment.yml
 WantedBy=multi-user.target default.target
 ```
 
-Example for locally built image to be used in a container:
+Example for locally built image to be used in a container with build-specific arguments:
 
 `test.build`
 ```
@@ -2293,6 +2302,9 @@ ImageTag=localhost/imagename
 # expecting to find a Containerfile/Dockerfile
 # + other files needed to build the image
 SetWorkingDirectory=unit
+# Set build arguments VERSION and DEBUG
+BuildArg=VERSION=1.0 \
+          DEBUG=false
 ```
 
 `test.container`