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Document environment variable usage

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Nick Craig-Wood 2017-01-03 22:42:08 +00:00
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@ -733,3 +733,64 @@ message and which file caused the problem. A high priority message is
also shown when starting a retry so the user can see that any previous
error messages may not be valid after the retry. If rclone has done a
retry it will log a high priority message if the retry was successful.
Environment Variables
---------------------
Rclone can be configured entirely using environment variables. These
can be used to set defaults for options or config file entries.
### Options ###
Every option in rclone can have its default set by environment
variable.
To find the name of the environment variable, first take the long
option name, strip the leading `--`, change `-` to `_`, make
upper case and prepend `RCLONE_`.
For example to always set `--stats 5s`, set the environment variable
`RCLONE_STATS=5s`. If you set stats on the command line this will
override the environment variable setting.
Or to always use the trash in drive `--drive-use-trash`, set
`RCLONE_DRIVE_USE_TRASH=true`.
The same parser is used for the options and the environment variables
so they take exactly the same form.
### Config file ###
You can set defaults for values in the config file on an individual
remote basis. If you want to use this feature, you will need to
discover the name of the config items that you want. The easiest way
is to run through `rclone config` by hand, then look in the config
file to see what the values are (the config file can be found by
looking at the help for `--config` in `rclone help`).
To find the name of the environment variable, you need to set, take
`RCLONE_` + name of remote + `_` + name of config file option and make
it all uppercase.
For example to configure an S3 remote named `mys3:` without a config
file (using unix ways of setting environment variables):
```
$ export RCLONE_CONFIG_MYS3_TYPE=s3
$ export RCLONE_CONFIG_MYS3_ACCESS_KEY_ID=XXX
$ export RCLONE_CONFIG_MYS3_SECRET_ACCESS_KEY=XXX
$ rclone lsd MYS3:
-1 2016-09-21 12:54:21 -1 my-bucket
$ rclone listremotes | grep mys3
mys3:
```
Note that if you want to create a remote using environment variables
you must create the `..._TYPE` variable as above.
### Other environment variables ###
* RCLONE_CONFIG_PASS` set to contain your config file password (see [Configuration Encryption](#configuration-encryption) section)
* HTTP_PROXY, HTTPS_PROXY and NO_PROXY (or the lowercase versions thereof).
* HTTPS_PROXY takes precedence over HTTP_PROXY for https requests.
* The environment values may be either a complete URL or a "host[:port]" for, in which case the "http" scheme is assumed.