X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/898915d5569f503c278ef53cb6f10e003034943c..114e8357e65384e17baaa3c31aa528371e15679b:/docs/usage_and_configuration/the_basics.md

diff --git a/docs/usage_and_configuration/the_basics.md b/docs/usage_and_configuration/the_basics.md
index 6f3a3cf..2a46148 100644
--- a/docs/usage_and_configuration/the_basics.md
+++ b/docs/usage_and_configuration/the_basics.md
@@ -246,7 +246,8 @@ respect the `--force-exclude` option on some editors that rely on using stdin.
 #### `-W`, `--workers`
 
 When _Black_ formats multiple files, it may use a process pool to speed up formatting.
-This option controls the number of parallel workers.
+This option controls the number of parallel workers. This can also be specified via the
+`BLACK_NUM_WORKERS` environment variable.
 
 #### `-q`, `--quiet`
 
@@ -296,6 +297,19 @@ Read configuration options from a configuration file. See
 
 Show available command-line options and exit.
 
+### Environment variable options
+
+_Black_ supports the following configuration via environment variables.
+
+#### `BLACK_CACHE_DIR`
+
+The directory where _Black_ should store its cache.
+
+#### `BLACK_NUM_WORKERS`
+
+The number of parallel workers _Black_ should use. The command line option `-W` /
+`--workers` takes precedence over this environment variable.
+
 ### Code input alternatives
 
 _Black_ supports formatting code via stdin, with the result being printed to stdout.