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[docs] Separate notes about environment variables

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@ -49,6 +49,7 @@
* [Extractor Options](#extractor-options)
* [CONFIGURATION](#configuration)
* [Authentication with .netrc file](#authentication-with-netrc-file)
* [Notes about environment variables](#notes-about-environment-variables)
* [OUTPUT TEMPLATE](#output-template)
* [Output template examples](#output-template-examples)
* [FORMAT SELECTION](#format-selection)
@ -679,8 +680,7 @@ ## Filesystem Options:
--cache-dir DIR Location in the filesystem where yt-dlp can
store some downloaded information (such as
client ids and signatures) permanently. By
default $XDG_CACHE_HOME/yt-dlp or
~/.cache/yt-dlp
default ${XDG_CACHE_HOME}/yt-dlp
--no-cache-dir Disable filesystem caching
--rm-cache-dir Delete all filesystem cache files
@ -1088,20 +1088,25 @@ # CONFIGURATION
You can configure yt-dlp by placing any supported command line option to a configuration file. The configuration is loaded from the following locations:
1. **Main Configuration**: The file given by `--config-location`
1. **Portable Configuration**: `yt-dlp.conf` in the same directory as the bundled binary. If you are running from source-code (`<root dir>/yt_dlp/__main__.py`), the root directory is used instead.
1. **Home Configuration**: `yt-dlp.conf` in the home path given by `-P`, or in the current directory if no such path is given
1. **Main Configuration**:
* The file given by `--config-location`
1. **Portable Configuration**: (Recommended for portable installations)
* If using a binary, `yt-dlp.conf` in the same directory as the binary
* If running from source-code, `yt-dlp.conf` in the parent directory of `yt_dlp`
1. **Home Configuration**:
* `yt-dlp.conf` in the home path given by `-P`
* If `-P` is not given, the current directory is searched
1. **User Configuration**:
* `$XDG_CONFIG_HOME/yt-dlp/config` (recommended on Linux/macOS)
* `$XDG_CONFIG_HOME/yt-dlp.conf`
* `$APPDATA/yt-dlp/config` (recommended on Windows)
* `$APPDATA/yt-dlp/config.txt`
* `${XDG_CONFIG_HOME}/yt-dlp/config` (recommended on Linux/macOS)
* `${XDG_CONFIG_HOME}/yt-dlp.conf`
* `${APPDATA}/yt-dlp/config` (recommended on Windows)
* `${APPDATA}/yt-dlp/config.txt`
* `~/yt-dlp.conf`
* `~/yt-dlp.conf.txt`
`$XDG_CONFIG_HOME` defaults to `~/.config` if undefined. On windows, `$APPDATA` generally points to `C:\Users\<user name>\AppData\Roaming` and `~` points to `$HOME` if present, `$USERPROFILE` (generally `C:\Users\<user name>`), or `${HOMEDRIVE}${HOMEPATH}`
1. **System Configuration**: `/etc/yt-dlp.conf`
See also: [Notes about environment variables](#notes-about-environment-variables)
1. **System Configuration**:
* `/etc/yt-dlp.conf`
E.g. with the following configuration file yt-dlp will always extract the audio, not copy the mtime, use a proxy and save all videos under `YouTube` directory in your home directory:
```
@ -1134,8 +1139,8 @@ ### Authentication with `.netrc` file
You may also want to configure automatic credentials storage for extractors that support authentication (by providing login and password with `--username` and `--password`) in order not to pass credentials as command line arguments on every yt-dlp execution and prevent tracking plain text passwords in the shell command history. You can achieve this using a [`.netrc` file](https://stackoverflow.com/tags/.netrc/info) on a per extractor basis. For that you will need to create a `.netrc` file in `--netrc-location` and restrict permissions to read/write by only you:
```
touch $HOME/.netrc
chmod a-rwx,u+rw $HOME/.netrc
touch ${HOME}/.netrc
chmod a-rwx,u+rw ${HOME}/.netrc
```
After that you can add credentials for an extractor in the following format, where *extractor* is the name of the extractor in lowercase:
```
@ -1148,7 +1153,14 @@ ### Authentication with `.netrc` file
```
To activate authentication with the `.netrc` file you should pass `--netrc` to yt-dlp or place it in the [configuration file](#configuration).
The default location of the .netrc file is `$HOME` (`~`). On Windows, if `$HOME` is not present, `$USERPROFILE` (generally `C:\Users\<user name>`) or `${HOMEDRIVE}${HOMEPATH}` is used
The default location of the .netrc file is `~` (see below).
### Notes about environment variables
* Environment variables are normally specified as `${VARIABLE}`/`$VARIABLE` on UNIX and `%VARIABLE%` on Windows; but is always shown as `${VARIABLE}` in this documentation
* yt-dlp also allow using UNIX-style variables on Windows for path-like options; e.g. `--output`, `--config-location`
* If unset, `${XDG_CONFIG_HOME}` defaults to `~/.config` and `${XDG_CACHE_HOME}` to `~/.cache`
* On Windows, `~` points to `${HOME}` if present; or, `${USERPROFILE}` or `${HOMEDRIVE}${HOMEPATH}` otherwise
* On Windows, `${USERPROFILE}` generally points to `C:\Users\<user name>` and `${APPDATA}` to `${USERPROFILE}\AppData\Roaming`
# OUTPUT TEMPLATE