Rory Hunter 2bd3a05892
Refactor environment variable processing for Docker (#50221)
Backport of #49612.

The current Docker entrypoint script picks up environment variables and
translates them into -E command line arguments. However, since any tool
executes via `docker exec` doesn't run the entrypoint, it results in
a poorer user experience.

Therefore, refactor the env var handling so that the -E options are
generated in `elasticsearch-env`. These have to be appended to any
existing command arguments, since some CLI tools have subcommands and
-E arguments must come after the subcommand.

Also extract the support for `_FILE` env vars into a separate script, so
that it can be called from more than once place (the behaviour is
idempotent).

Finally, add noop -E handling to CronEvalTool for parity, and support
`-E` in MultiCommand before subcommands.
2019-12-16 15:39:28 +00:00
..
2019-10-11 16:34:11 +03:00
2018-04-20 15:33:59 -07:00

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