move the client example to its own crate

We're likely to add more examples with more dependencies (e.g. ffmpeg,
gstreamer, webrtc). Nice to not have their deps in the main crate's
dev-dependencies, and likewise to have each example show its true
dependencies.

As mentioned here:
#19 (comment)

Author: scottlamb

.github/workflows/ci.yml

@@ -35,27 +35,29 @@ jobs:
         toolchain: ${{ matrix.rust }}
         override: true
         components: ${{ matrix.extra_components }}
+    - name: Build
+      run: cargo build --all-features --all-targets --workspace
     - name: Test
-      run: cargo test --all-features --all-targets
+      run: cargo test --all-features --all-targets --workspace
     - name: Check fuzz tests
-      run: cd fuzz && cargo check
+      run: cd fuzz && cargo check --workspace
     - name: Check main crate formatting
       if: matrix.rust == 'stable'
       run: cargo fmt -- --check
     - name: Check fuzz crate formatting
       if: matrix.rust == 'stable'
-      run: cd fuzz && cargo fmt -- --check
+      run: cd fuzz && cargo fmt -- --check --all
     - name: Clippy on main crate
       if: matrix.rust == 'stable'
-      run: cargo clippy -- -D warnings
+      run: cargo clippy --workspace -- -D warnings
     - name: Clippy on fuzz crate
       if: matrix.rust == 'stable'
-      run: cd fuzz && cargo clippy -- -D warnings
+      run: cd fuzz && cargo clippy --workspace -- -D warnings
 
   license:
     name: Check copyright/license headers
     runs-on: ubuntu-20.04
     steps:
       - name: Checkout
         uses: actions/checkout@v2
-      - run: find . -type f -print0 | xargs -0 .github/workflows/check-license.py
+      - run: find . -type f -print0 | xargs -0 .github/workflows/check-license.py

Cargo.lock

@@ -1,3 +1,7 @@
+[workspace]
+members = [".", "examples/client"]
+default-members = ["."]
+
 [package]
 name = "retina"
 version = "0.4.0"
@@ -34,12 +38,9 @@ tokio-util = { version = "0.7.3", features = ["codec"] }
 url = "2.2.1"
 
 [dev-dependencies]
-anyhow = "1.0.41"
 criterion = { version = "0.3.4", features = ["async_tokio"] }
-itertools = "0.10.1"
 mylog = { git = "https://github.com/scottlamb/mylog" }
-structopt = "0.3.21"
-tokio = { version = "1.5.0", features = ["fs", "io-util", "macros", "parking_lot", "rt-multi-thread", "signal", "test-util"] }
+tokio = { version = "1.5.0", features = ["io-util", "macros", "rt-multi-thread", "test-util"] }
 
 [profile.bench]
 debug = true

Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "client"
+version = "0.0.0"
+publish = false
+edition = "2021"
+rust-version = "1.59"
+
+[dependencies]
+bytes = "1.0.1"
+futures = "0.3.14"
+log = "0.4.8"
+retina = { path = "../../" }
+tokio = { version = "1.5.0", features = ["fs", "io-util", "macros", "rt-multi-thread", "signal"] }
+url = "2.2.1"
+anyhow = "1.0.41"
+itertools = "0.10.1"
+mylog = { git = "https://github.com/scottlamb/mylog" }
+structopt = "0.3.21"