Samuel Dionne-Riel ec57bd7454 cmd: env: Add indirect to indirectly set values
This allows an ergonomic-enough approximation of ${!variable} expansion.
This could be used the following way:

```
for target in ${boot_targets}; do
   env indirect target_name target_name_${target}
   # ...
done
```

Assuming `target_name_mmc0` and similar are set appropriately.

A default value can be optionally provided.

Note: this acts on environment variables, not hush variables.

Signed-off-by: Samuel Dionne-Riel <samuel@dionne-riel.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: "Marek Behún" <marek.behun@nic.cz>
[trini: Don't enable by default]
2022-04-07 16:50:42 -04:00
..
2017-02-08 15:56:28 -05:00
2022-01-25 11:44:36 -07:00
2022-01-14 13:16:11 -05:00
2022-02-05 15:49:00 +01:00
2021-08-26 08:08:11 +02:00
2022-03-31 14:12:23 -04:00
2020-05-18 18:36:55 -04:00
2020-05-18 18:36:55 -04:00
2022-02-25 01:41:04 -05:00
2022-03-28 20:14:24 +02:00
2020-05-18 18:36:55 -04:00
2020-12-18 20:32:21 -07:00
2022-01-19 18:11:34 +01:00
2022-01-19 18:11:34 +01:00
2020-05-18 18:36:55 -04:00
2022-01-15 10:57:22 +01:00
2021-11-16 14:35:09 -05:00
2022-03-15 16:19:29 -04:00
2020-05-18 18:36:55 -04:00
2022-03-10 08:28:36 -05:00
2020-05-18 18:36:55 -04:00
2020-05-18 18:36:55 -04:00
2020-10-23 13:33:07 -04:00
2022-01-21 14:01:35 -05:00
2022-01-19 18:11:34 +01:00
2020-05-18 18:36:55 -04:00
2020-05-18 18:36:55 -04:00
2021-12-05 09:23:15 -07:00
2021-08-30 14:10:07 -04:00
2020-05-18 18:36:55 -04:00
2020-05-18 18:36:55 -04:00
2022-01-19 18:11:34 +01:00
2020-05-18 18:36:55 -04:00
2022-03-15 16:19:29 -04:00
2021-11-28 16:51:51 -07:00
2022-01-19 18:11:34 +01:00
2020-10-28 11:49:31 -04:00
2020-05-18 18:36:55 -04:00
2020-07-08 17:21:46 -04:00
2022-01-15 10:57:22 +01:00
2022-01-19 18:11:34 +01:00
2020-05-18 18:36:55 -04:00
2020-12-18 20:32:21 -07:00
2020-05-18 18:36:55 -04:00
2022-01-19 18:11:34 +01:00
2022-01-19 18:11:34 +01:00
2021-09-24 14:30:46 -04:00
2020-08-07 22:31:32 -04:00
2020-05-18 21:19:18 -04:00
2020-05-18 18:36:55 -04:00
2021-10-21 07:39:05 +02:00
2022-01-19 18:11:34 +01:00
2021-10-09 13:09:56 -04:00
2020-05-18 18:36:55 -04:00
2020-05-18 18:36:55 -04:00
2020-05-18 18:36:55 -04:00