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https://github.com/jcpsantiago/sentryR

Unofficial R client for Sentry
https://github.com/jcpsantiago/sentryR

error-monitoring r sentry shared-lib

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Unofficial R client for Sentry

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# sentryR

`sentryR` is an unofficial R client for [Sentry](https://sentry.io).
It includes an error handler for Plumber for uncaught exceptions.

## Installation
You can install the latest development version of `sentryR` with:

``` r
# install.packages("remotes")
remotes::install_github("jcpsantiago/sentryR")
```

or the stable version in CRAN with:

```r
install.packages("sentryR")
```

## Using sentryR

`configure_sentry` and `capture` are the two core functions of `sentryR`.
The first sets up an isolated environment with your Sentry project's DSN,
optionally your app's name, version and the environment it's running in.
Both `configure_sentry` and any of the `capture_` functions accept
additional fields to pass on to Sentry as named lists.
`NULL`ifying a field will remove it.

```r
library(sentryR)

configure_sentry(dsn = Sys.getenv("SENTRY_DSN"),
app_name = "myapp", app_version = "8.8.8",
environment = Sys.getenv("APP_ENV"),
tags = list(foo = "tag1", bar = "tag2"),
runtime = NULL)

capture(message = "my message", level = "info")
```

You are encouraged to use the two wrappers around `capture` included:
`capture_exception`, which handles the error object and then reports the error
to Sentry, and `capture_message` for transmitting messages.
Refer to the [Sentry docs](https://docs.sentry.io/development/sdk-dev/event-payloads/)
for a full list of available fields.

By default `sentryR` will send the following fields to Sentry:
```r
list(
logger = "R",
platform = "R", # Sentry will ignore this for now
sdk = list(
name = "SentryR",
version = ...
),
contexts = list(
os = list(
name = ...,
version = ...,
kernel_version = ...
),
runtime = list(
version = ...,
type = "runtime",
name = "R",
build = ...
)
),
timestamp = ...,
event_id = ...
)
```

`capture_exception` further adds the `exception` field to the payload.

## Example with Plumber

In a Plumber API, besides the initial configuration for Sentry,
you'll also have to set the error handler.

`sentryR` ships with the default `plumber` error handler wrapped
in the convenience function `sentry_error_handler`, but you can use
your own function and wrap it as below:

```r
library(plumber)
library(sentryR)

# add list of installed packages and their versions.
# this can be slow in systems with a high number of packages installed,
# so it is not the default behavior
installed_pkgs_df <- as.data.frame(utils::installed.packages(),
stringsAsFactors = FALSE
)
versions <- installed_pkgs_df$Version
names(versions) <- installed_pkgs_df$Package
packages <- as.list(versions)

configure_sentry(dsn = Sys.getenv('SENTRY_DSN'),
app_name = "myapp", app_version = "1.0.0",
modules = packages)

my_sentry_error_handler <- wrap_error_handler_with_sentry(my_error_handler)

r <- plumb("R/api.R")
r$setErrorHandler(my_sentry_error_handler)
r$run(host = "0.0.0.0", port = 8000)
```

and wrap your endpoint functions with `with_captured_calls`

```r
#* @get /error
api_error <- with_captured_calls(function(res, req){
stop("error")
})
```

once this is done, Plumber will handle any errors, send them to Sentry using
`capture_exception`, and respond with status `500` and the error message.
You don't need to do any further configuration.

## Example with Shiny

You can also use `sentryR` to capture exceptions in your Shiny applications
by providing a callback function to the `shiny.error` option.

```r
library(shiny)
library(sentryR)

configure_sentry(dsn = Sys.getenv('SENTRY_DSN'),
app_name = "myapp", app_version = "1.0.0",
modules = packages)

error_handler <- function() {
capture_exception(error = geterrmessage())
}

options(shiny.error = error_handler)

shinyServer(function(input, output) {
# Define server logic
...
}
```

## Acknowledgements

`sentryR` took inspiration from
[raven-clj](https://github.com/sethtrain/raven-clj) a Clojure interface to Sentry.

## Contributing

PRs and issues are welcome! :tada: