thisisnic commented on a change in pull request #12131:
URL: https://github.com/apache/arrow/pull/12131#discussion_r785008847
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File path: r/vignettes/fs.Rmd
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@@ -144,3 +147,28 @@
s3://minioadmin:minioadmin@?scheme=http&endpoint_override=localhost%3A9000
Among other applications, this can be useful for testing out code locally
before
running on a remote S3 bucket.
+
+## Disabling the use of environment variables
+
+As mentioned above, it is possible to make use of environment variables to
+configure access. However, if you wish to pass in connection details via a URI
+or alternative methods but also have existing AWS environment variables
defined,
+these may interfere with your session. You can unset these environment
+variables using `Sys.unsetenv()`, for example:
+
+```{r, eval = FALSE}
+Sys.unsetenv("AWS_DEFAULT_REGION")
+Sys.unsetenv("AWS_S3_ENDPOINT")
+```
+
+By default, the AWS SDK tries to retrieve metadata about user configuration,
+which can cause conficts when passing in connection details via URI (for
example
+when accessing a MINIO bucket). To disable the use of AWS environment
+variables, you can set environment variable `AWS_EC2_METADATA_DISABLED` to
+`TRUE`.
+
+```{r, eval = FALSE}
+Sys.setenv(AWS_EC2_METADATA_DISABLED = TRUE)
+```
+
+
Review comment:
Just checking - those backticks are required, right? Was it the trailing
whitespace that needs removing?
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