feat(metrics): Add send-metric command (#2063)

Add CLI command send-metric for emitting metrics to Sentry.
Add new command-parser that uses clap's Derive API. Future commands should use this as the Derive API makes it:
-Easier to read, write, and modify arguments and commands.
-Easier to keep the argument declaration and reading of argument in sync.
-Easier to reuse shared arguments.

Fixes GH-2001

Cargo.toml

@@ -16,6 +16,7 @@ bytecount = "0.6.3"
 chardet = "0.2.4"
 chrono = { version = "0.4.31", features = ["serde"] }
 clap = { version = "4.1.6", default-features = false, features = [
+  "derive",
   "std",
   "suggestions",
   "wrap_help",
@@ -58,10 +59,11 @@ regex = "1.7.3"
 runas = "1.0.0"
 rust-ini = "0.18.0"
 semver = "1.0.16"
-sentry = { version = "0.32.2", default-features = false, features = [
+sentry = { version = "0.33.0", default-features = false, features = [
   "anyhow",
   "curl",
   "contexts",
+  "UNSTABLE_metrics",
 ] }
 serde = { version = "1.0.152", features = ["derive"] }
 serde_json = "1.0.93"

src/api/envelopes_api.rs

@@ -0,0 +1,39 @@
+use super::{
+    errors::{ApiErrorKind, ApiResult},
+    Api, ApiResponse, Method,
+};
+use crate::{api::errors::ApiError, constants::USER_AGENT};
+use log::debug;
+use sentry::{types::Dsn, Envelope};
+use std::sync::Arc;
+
+pub struct EnvelopesApi {
+    api: Arc<Api>,
+    dsn: Dsn,
+}
+
+impl EnvelopesApi {
+    pub fn try_new() -> ApiResult<EnvelopesApi> {
+        let api = Api::current();
+        api.config
+            .get_dsn()
+            .map(|dsn| EnvelopesApi { api, dsn })
+            .map_err(|_| ApiErrorKind::DsnMissing.into())
+    }
+
+    pub fn send_envelope(&self, envelope: Envelope) -> ApiResult<ApiResponse> {
+        let mut body = vec![];
+        envelope
+            .to_writer(&mut body)
+            .map_err(|e| ApiError::with_source(ApiErrorKind::CannotSerializeEnvelope, e))?;
+        let url = self.dsn.envelope_api_url();
+        let auth = self.dsn.to_auth(Some(USER_AGENT));
+        debug!("Sending envelope:\n{}", String::from_utf8_lossy(&body));
+        self.api
+            .request(Method::Post, url.as_str(), None)?
+            .with_header("X-Sentry-Auth", &auth.to_string())?
+            .with_body(body)?
+            .send()?
+            .into_result()
+    }
+}

src/api/errors/api_error.rs

@@ -12,6 +12,8 @@ pub struct ApiError {
 pub(in crate::api) enum ApiErrorKind {
     #[error("could not serialize value as JSON")]
     CannotSerializeAsJson,
+    #[error("could not serialize envelope")]
+    CannotSerializeEnvelope,
     #[error("could not parse JSON response")]
     BadJson,
     #[error("not a JSON response")]
@@ -38,6 +40,10 @@ pub(in crate::api) enum ApiErrorKind {
         "Auth token is required for this request. Please run `sentry-cli login` and try again!"
     )]
     AuthMissing,
+    #[error(
+        "DSN missing. Please set the `SENTRY_DSN` environment variable to your project's DSN."
+    )]
+    DsnMissing,
 }
 
 impl fmt::Display for ApiError {

src/api/mod.rs

@@ -3,6 +3,8 @@
 //! to the GitHub API to figure out if there are new releases of the
 //! sentry-cli tool.
 
+pub mod envelopes_api;
+
 mod connection_manager;
 mod encoding;
 mod errors;
@@ -1746,6 +1748,11 @@ impl ApiRequest {
         Ok(self)
     }
 
+    pub fn with_body(mut self, body: Vec<u8>) -> ApiResult<Self> {
+        self.body = Some(body);
+        Ok(self)
+    }
+
     /// attaches some form data to the request.
     pub fn with_form_data(mut self, form: curl::easy::Form) -> ApiResult<Self> {
         debug!("sending form data");

src/commands/derive_parser.rs

@@ -0,0 +1,36 @@
+use crate::utils::auth_token::AuthToken;
+use crate::utils::value_parsers::kv_parser;
+use clap::{command, value_parser, ArgAction::SetTrue, Parser, Subcommand};
+
+use super::send_metric::SendMetricArgs;
+
+#[derive(Parser)]
+pub(super) struct SentryCLI {
+    #[command(subcommand)]
+    pub(super) command: SentryCLICommand,
+
+    #[arg(global=true, long="header", value_name="KEY:VALUE", value_parser=kv_parser)]
+    #[arg(help = "Custom headers that should be attached to all requests{n}in key:value format")]
+    pub(super) headers: Vec<(String, String)>,
+
+    #[arg(global=true, long, value_parser=value_parser!(AuthToken))]
+    #[arg(help = "Use the given Sentry auth token")]
+    pub(super) auth_token: Option<AuthToken>,
+
+    #[arg(global=true, ignore_case=true, value_parser=["trace", "debug", "info", "warn", "error"])]
+    #[arg(long, help = "Set the log output verbosity")]
+    pub(super) log_level: Option<String>,
+
+    #[arg(global=true, action=SetTrue, visible_alias="silent", long)]
+    #[arg(help = "Do not print any output while preserving correct exit code. \
+        This flag is currently implemented only for selected subcommands")]
+    pub(super) quiet: bool,
+
+    #[arg(global=true, action=SetTrue, long, hide=true, help="Always return 0 exit code")]
+    pub(super) allow_failure: bool,
+}
+
+#[derive(Subcommand)]
+pub(super) enum SentryCLICommand {
+    SendMetric(SendMetricArgs),
+}