From ff518a0b8581dca887d957974f7a43ecb934a0bb Mon Sep 17 00:00:00 2001
From: Matt Stark <msta@google.com>
Date: Mon, 29 Apr 2024 11:12:43 +1000
Subject: [PATCH] Demo API client.

To try this out, run:
cargo run api grpc --port 8888

Then run cargo run api_client
---
 Cargo.lock             |  9 +++++++++
 Cargo.toml             |  3 ++-
 api_client/Cargo.toml  | 19 +++++++++++++++++++
 api_client/src/main.rs | 15 +++++++++++++++
 4 files changed, 45 insertions(+), 1 deletion(-)
 create mode 100644 api_client/Cargo.toml
 create mode 100644 api_client/src/main.rs

diff --git a/Cargo.lock b/Cargo.lock
index 1bded5786d..5b97c43023 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -119,6 +119,15 @@ version = "1.0.82"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f538837af36e6f6a9be0faa67f9a314f8119e4e4b5867c6ab40ed60360142519"
 
+[[package]]
+name = "api_client"
+version = "0.16.0"
+dependencies = [
+ "jj-api",
+ "tokio",
+ "tonic",
+]
+
 [[package]]
 name = "arc-swap"
 version = "1.7.1"
diff --git a/Cargo.toml b/Cargo.toml
index 2c42de10d7..9cfe4b5c91 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,7 @@ cargo-features = []
 
 [workspace]
 resolver = "2"
-members = [ "api", "cli", "lib", "lib/gen-protos", "lib/proc-macros", "lib/testutils"]
+members = [ "api", "api_client","cli", "lib", "lib/gen-protos", "lib/proc-macros", "lib/testutils"]
 
 [workspace.package]
 version = "0.16.0"
@@ -102,6 +102,7 @@ tokio = { version = "1.37.0", features = ["rt", "macros"] }
 toml_edit = { version = "0.19.15", features = ["serde"] }
 tonic = "0.11.0"
 tonic-build = "0.11.0"
+tonic-reflection = "0.11.0"
 tonic-web = "0.11.0"
 tracing = "0.1.40"
 tracing-chrome = "0.7.2"
diff --git a/api_client/Cargo.toml b/api_client/Cargo.toml
new file mode 100644
index 0000000000..64a13edb17
--- /dev/null
+++ b/api_client/Cargo.toml
@@ -0,0 +1,19 @@
+[package]
+name = "api_client"
+version.workspace = true
+license.workspace = true
+rust-version.workspace = true
+edition.workspace = true
+readme.workspace = true
+homepage.workspace = true
+repository.workspace = true
+documentation.workspace = true
+categories.workspace = true
+keywords.workspace = true
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+tonic.workspace = true
+jj-api.workspace = true
+tokio = { workspace = true, features = ["full"] }
\ No newline at end of file
diff --git a/api_client/src/main.rs b/api_client/src/main.rs
new file mode 100644
index 0000000000..e521b3441c
--- /dev/null
+++ b/api_client/src/main.rs
@@ -0,0 +1,15 @@
+use jj_api::client::JjServiceClient;
+use jj_api::rpc::ListWorkspacesRequest;
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let mut client = JjServiceClient::connect("http://[::1]:8888").await?;
+
+    let request = tonic::Request::new(ListWorkspacesRequest::default());
+
+    let response = client.list_workspaces(request).await?;
+
+    println!("RESPONSE={:?}", response);
+
+    Ok(())
+}