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podman/docs/source/markdown/options/env.md
Jan Kaluza c12b1b32bc Rewrite the Quadlet documentation. 
This commit does the following:

- Splits the podman-systemd.unit.5.md into multiple files - one for each
  quadlet file type, podman-quadlet.7.md for general quadlet information
  and podman-quadlet-basic-usage.7.md for quadlet examples.
- Removes the original podman-systemd.unit.5.md file.
- Adds support for jinja2 templating language in the markdown_preprocess.
- Uses jinja2 in options/*.md to use the single .md file for both podman
  subcommands man-pages and quadlet man-pages. This deduplicates
  the Quadlet man-pages a lot.
- Adds new `@@option quadlet:source.md` preprocess command to import
  such .md files from options directory.

Signed-off-by: Jan Kaluza <jkaluza@redhat.com>
2025-09-02 12:49:45 +02:00

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####> This option file is used in: ####> podman podman-container.unit.5.md.in, create, exec, run ####> If file is edited, make sure the changes ####> are applicable to all of those. {% if is_quadlet %}

Environment=env

{% else %}

--env, -e=env

{% endif %}

Set environment variables.

This option allows arbitrary environment variables that are available for the process to be launched inside of the container. If an environment variable is specified without a value, Podman checks the host environment for a value and set the variable only if it is set on the host. As a special case, if an environment variable ending in * is specified without a value, Podman searches the host environment for variables starting with the prefix and adds those variables to the container.