feat(snapshots): Add download command for baseline snapshots

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: NicoHinderling

CHANGELOG.md

@@ -5,6 +5,7 @@
 ### Features
 
 - (snapshots) Add `snapshots diff` command for locally comparing directories of PNG snapshot images using odiff ([#3306](https://github.com/getsentry/sentry-cli/pull/3306))
+- (snapshots) Add `snapshots download` command for downloading baseline snapshot images from Sentry ([#3310](https://github.com/getsentry/sentry-cli/pull/3310))
 
 ### Performance
 

Cargo.toml

@@ -70,6 +70,7 @@ sha2 = "0.10.9"
 sourcemap = { version = "9.3.0", features = ["ram_bundle"] }
 symbolic = { version = "12.13.3", features = ["debuginfo-serde", "il2cpp"] }
 tar = "0.4"
+tempfile = "3.8.1"
 thiserror = "1.0.38"
 tokio = { version = "1.47", features = ["rt"] }
 url = "2.3.1"

src/api/mod.rs

@@ -1028,6 +1028,45 @@ impl AuthenticatedApi<'_> {
         );
         self.get(&path)?.convert()
     }
+
+    pub fn get_latest_base_snapshot(
+        &self,
+        org: &str,
+        app_id: &str,
+        branch: Option<&str>,
+    ) -> ApiResult<Option<LatestBaseSnapshotResponse>> {
+        let mut path = format!(
+            "/organizations/{}/preprodartifacts/snapshots/latest-base/?app_id={}",
+            PathArg(org),
+            QueryArg(app_id),
+        );
+        if let Some(branch) = branch {
+            path.push_str(&format!("&branch={}", QueryArg(branch)));
+        }
+        let resp = self.get(&path)?;
+        if resp.status() == 404 {
+            Ok(None)
+        } else {
+            resp.convert()
+        }
+    }
+
+    pub fn download_snapshot_zip(
+        &self,
+        org: &str,
+        snapshot_id: &str,
+        dst: &mut std::fs::File,
+    ) -> ApiResult<ApiResponse> {
+        let path = format!(
+            "/organizations/{}/preprodartifacts/snapshots/{}/download/",
+            PathArg(org),
+            PathArg(snapshot_id),
+        );
+        self.request(Method::Get, &path)?
+            .follow_location(true)?
+            .progress_bar_mode(ProgressBarMode::Response)
+            .send_into(dst)
+    }
 }
 
 /// Available datasets for fetching organization events
@@ -2044,6 +2083,12 @@ pub struct LogEntry {
     pub message: Option<String>,
 }
 
+#[derive(Deserialize)]
+pub struct LatestBaseSnapshotResponse {
+    pub head_artifact_id: String,
+    pub image_count: u64,
+}
+
 /// Upload options returned by the snapshots upload-options endpoint.
 #[derive(Debug, Deserialize)]
 #[serde(rename_all = "camelCase")]

src/commands/snapshots/download.rs

@@ -0,0 +1,134 @@
+use std::fs;
+use std::io::{self, Seek as _};
+use std::path::PathBuf;
+
+use anyhow::{bail, Result};
+use clap::{Arg, ArgMatches, Command};
+
+use crate::api::Api;
+use crate::config::Config;
+use crate::utils::fs::path_as_url;
+
+const EXPERIMENTAL_WARNING: &str =
+    "[EXPERIMENTAL] The \"snapshots download\" command is experimental. \
+    The command is subject to breaking changes, including removal, in any Sentry CLI release.";
+
+pub fn make_command(command: Command) -> Command {
+    command
+        .about("[EXPERIMENTAL] Download baseline snapshot images from Sentry.")
+        .long_about(format!(
+            "Download baseline snapshot images from Sentry's preprod system to a local directory.\n\n\
+            {EXPERIMENTAL_WARNING}"
+        ))
+        .arg(
+            Arg::new("app_id")
+                .long("app-id")
+                .value_name("APP_ID")
+                .help("App identifier (e.g. sentry-frontend). Mutually exclusive with --snapshot-id.")
+                .conflicts_with("snapshot_id"),
+        )
+        .arg(
+            Arg::new("snapshot_id")
+                .long("snapshot-id")
+                .value_name("ID")
+                .help("Direct snapshot artifact ID. Mutually exclusive with --app-id.")
+                .conflicts_with("app_id"),
+        )
+        .arg(
+            Arg::new("branch")
+                .long("branch")
+                .value_name("NAME")
+                .help("Git branch filter (only with --app-id).")
+                .requires("app_id"),
+        )
+        .arg(
+            Arg::new("output")
+                .long("output")
+                .short('o')
+                .value_name("DIR")
+                .help("Directory for extracted images.")
+                .default_value("./snapshots-base/"),
+        )
+}
+
+pub fn execute(matches: &ArgMatches) -> Result<()> {
+    eprintln!("{EXPERIMENTAL_WARNING}");
+
+    let config = Config::current();
+    let org = config.get_org(matches)?;
+    let api_ref = Api::current();
+    let api = api_ref.authenticated()?;
+
+    let app_id = matches.get_one::<String>("app_id");
+    let snapshot_id_arg = matches.get_one::<String>("snapshot_id");
+    let branch = matches.get_one::<String>("branch").map(|s| s.as_str());
+    let output_dir = PathBuf::from(
+        matches
+            .get_one::<String>("output")
+            .expect("output has a default value"),
+    );
+
+    let snapshot_id = match (app_id, snapshot_id_arg) {
+        (Some(app_id), None) => {
+            eprintln!("Resolving latest baseline snapshot for app '{app_id}'...");
+            match api.get_latest_base_snapshot(&org, app_id, branch)? {
+                Some(resp) => {
+                    eprintln!(
+                        "Found snapshot {} ({} images)",
+                        resp.head_artifact_id, resp.image_count
+                    );
+                    resp.head_artifact_id
+                }
+                None => {
+                    let branch_msg = branch
+                        .map(|b| format!(" on branch '{b}'"))
+                        .unwrap_or_default();
+                    bail!("No baseline snapshot found for app '{app_id}'{branch_msg}");
+                }
+            }
+        }
+        (None, Some(id)) => id.clone(),
+        _ => bail!("Exactly one of --app-id or --snapshot-id must be provided"),
+    };
+
+    eprintln!("Downloading snapshot {snapshot_id}...");
+    let mut tmp = tempfile::tempfile()?;
+    let response = api.download_snapshot_zip(&org, &snapshot_id, &mut tmp)?;
+
+    if response.failed() {
+        bail!(
+            "Failed to download snapshot (server returned status {}).",
+            response.status()
+        );
+    }
+
+    tmp.seek(io::SeekFrom::Start(0))?;
+    let mut archive = zip::ZipArchive::new(&mut tmp)?;
+
+    fs::create_dir_all(&output_dir)?;
+
+    let mut extracted = 0usize;
+    for i in 0..archive.len() {
+        let mut entry = archive.by_index(i)?;
+        if entry.is_dir() {
+            continue;
+        }
+        let Some(enclosed_name) = entry.enclosed_name() else {
+            continue;
+        };
+        let out_path = output_dir.join(&enclosed_name);
+        if let Some(parent) = out_path.parent() {
+            fs::create_dir_all(parent)?;
+        }
+        let mut out_file = fs::File::create(&out_path)?;
+        io::copy(&mut entry, &mut out_file)?;
+        extracted += 1;
+    }
+
+    eprintln!(
+        "\nDownloaded {extracted} images from snapshot {snapshot_id} to {}",
+        path_as_url(&output_dir)
+    );
+
+    Ok(())
+}

src/commands/snapshots/mod.rs

@@ -2,10 +2,12 @@ use anyhow::Result;
 use clap::{ArgMatches, Command};
 
 pub mod diff;
+pub mod download;
 
 macro_rules! each_subcommand {
     ($mac:ident) => {
         $mac!(diff);
+        $mac!(download);
     };
 }
 

tests/integration/_cases/snapshots/snapshots-download-help.trycmd

@@ -0,0 +1,45 @@
+```
+$ sentry-cli snapshots download --help
+? success
+Download baseline snapshot images from Sentry's preprod system to a local directory.
+
+[EXPERIMENTAL] The "snapshots download" command is experimental. The command is subject to breaking
+changes, including removal, in any Sentry CLI release.
+
+Usage: sentry-cli[EXE] snapshots download [OPTIONS]
+
+Options:
+      --app-id <APP_ID>
+          App identifier (e.g. sentry-frontend). Mutually exclusive with --snapshot-id.
+
+      --header <KEY:VALUE>
+          Custom headers that should be attached to all requests
+          in key:value format.
+
+      --snapshot-id <ID>
+          Direct snapshot artifact ID. Mutually exclusive with --app-id.
+
+      --auth-token <AUTH_TOKEN>
+          Use the given Sentry auth token.
+
+      --branch <NAME>
+          Git branch filter (only with --app-id).
+
+      --log-level <LOG_LEVEL>
+          Set the log output verbosity. [possible values: trace, debug, info, warn, error]
+
+  -o, --output <DIR>
+          Directory for extracted images.
+          
+          [default: ./snapshots-base/]
+
+      --quiet
+          Do not print any output while preserving correct exit code. This flag is currently
+          implemented only for selected subcommands.
+          
+          [aliases: --silent]
+
+  -h, --help
+          Print help (see a summary with '-h')
+
+```

tests/integration/snapshots.rs

@@ -9,3 +9,8 @@ fn command_snapshots_diff_help() {
 fn command_snapshots_diff_missing_dir() {
     TestManager::new().register_trycmd_test("snapshots/snapshots-diff-missing-dir.trycmd");
 }
+
+#[test]
+fn command_snapshots_download_help() {
+    TestManager::new().register_trycmd_test("snapshots/snapshots-download-help.trycmd");
+}