Move integration crates in their own workspaces

Everytime you hit ctrl+s in VS code, the whole project in checked, which
normally is a nice thing, and I would not like to disable that in my
configuration.

But in rinja, the diffent integration crates don't work well with one
another and every single one will have compile errors in the automatic
check, because `rinja_derive` won't know what the relevant `rinja_xyz`
crate is. This renders the automatic check useless. Then it takes ages
to compile and recompile all transitively used `proc_macros`.

This PR moves all integration crates in there own, individual
workspaces. `cargo check` will ignore them unless you traverse manually
into their folders. The CI is set up to do just that.

.github/workflows/rust.yml

@@ -2,7 +2,7 @@ name: CI
 
 on:
   push:
-    branches: ['main']
+    branches: ['master']
   pull_request:
   schedule:
     - cron: "32 4 * * 5"
@@ -24,9 +24,12 @@ jobs:
       - uses: dtolnay/rust-toolchain@master
         with:
           toolchain: ${{ matrix.rust }}
+      - uses: taiki-e/install-action@v2
+        with:
+          tool: cargo-nextest
       - uses: Swatinem/rust-cache@v2
       - run: cargo build --all-targets
-      - run: cargo test
+      - run: cargo nextest run
 
   Package:
     strategy:
@@ -36,22 +39,39 @@ jobs:
           rinja_parser, rinja_rocket, rinja_warp, testing, examples/actix-web-app,
         ]
     runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: Swatinem/rust-cache@v2
-      - run: cd ${{ matrix.package }} && cargo test --all-targets
-      - run: cd ${{ matrix.package }} && cargo clippy --all-targets -- -D warnings
-
-  Lint:
-    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
         with:
-          components: rustfmt, clippy
+          components: clippy
+      - uses: taiki-e/install-action@v2
+        with:
+          tool: cargo-nextest
       - uses: Swatinem/rust-cache@v2
-      - run: cargo fmt --all -- --check
-      - run: cargo clippy --all-targets -- -D warnings
+      - run: cd ${{ matrix.package }} && cargo nextest run
+      - run: cd ${{ matrix.package }} && cargo clippy --all-targets -- -D warnings
+
+  Rustfmt:
+    runs-on: ubuntu-latest
+    steps:
+      # No need to test `rinja_derive_standalone`. It has same the `src` folder as `rinja_derive`.
+      # No need to run the checks in parallel. They are fast enough.
+      # No need for caching. No code is compiled at all.
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@nightly
+        with:
+          components: rustfmt
+      - run: |
+          set -eu
+          for PKG in \
+            rinja rinja_actix rinja_axum rinja_derive rinja_derive_standalone \
+            rinja_parser rinja_rocket rinja_warp testing examples/actix-web-app
+          do
+            cd "$PKG"
+            echo "Testing: $PKG"
+            cargo fmt -- --check
+            cd -
+          done
 
   MSRV:
     runs-on: ubuntu-latest

Cargo.toml

@@ -1,19 +1,8 @@
 [workspace]
 members = [
     "rinja",
-    "rinja_actix",
-    "rinja_axum",
     "rinja_derive",
     "rinja_parser",
-    "rinja_rocket",
-    "rinja_warp",
     "testing",
 ]
 resolver = "2"
-
-default-members = [
-    "rinja",
-    "rinja_derive",
-    "rinja_parser",
-    "testing",
-]

rinja_actix/Cargo.toml

@@ -8,7 +8,6 @@ categories = ["template-engine"]
 homepage = "https://github.com/rinja-rs/rinja"
 repository = "https://github.com/rinja-rs/rinja"
 license = "MIT OR Apache-2.0"
-workspace = ".."
 readme = "README.md"
 edition = "2021"
 rust-version = "1.71"
@@ -29,3 +28,6 @@ humansize = ["rinja/humansize"]
 num-traits = ["rinja/num-traits"]
 serde_json = ["rinja/serde_json"]
 urlencode = ["rinja/urlencode"]
+
+[workspace]
+members = ["."]

rinja_axum/Cargo.toml

@@ -10,7 +10,6 @@ homepage = "https://github.com/rinja-rs/rinja"
 repository = "https://github.com/rinja-rs/rinja"
 documentation = "https://docs.rs/rinja"
 license = "MIT OR Apache-2.0"
-workspace = ".."
 readme = "README.md"
 
 [dependencies]
@@ -31,3 +30,6 @@ humansize = ["rinja/humansize"]
 num-traits = ["rinja/num-traits"]
 serde_json = ["rinja/serde_json"]
 urlencode = ["rinja/urlencode"]
+
+[workspace]
+members = ["."]

rinja_rocket/Cargo.toml

@@ -8,7 +8,6 @@ categories = ["template-engine"]
 homepage = "https://github.com/rinja-rs/rinja"
 repository = "https://github.com/rinja-rs/rinja"
 license = "MIT OR Apache-2.0"
-workspace = ".."
 readme = "README.md"
 edition = "2021"
 rust-version = "1.71"
@@ -27,3 +26,6 @@ humansize = ["rinja/humansize"]
 num-traits = ["rinja/num-traits"]
 serde_json = ["rinja/serde_json"]
 urlencode = ["rinja/urlencode"]
+
+[workspace]
+members = ["."]

rinja_warp/Cargo.toml

@@ -8,7 +8,6 @@ categories = ["template-engine"]
 homepage = "https://github.com/rinja-rs/rinja"
 repository = "https://github.com/rinja-rs/rinja"
 license = "MIT OR Apache-2.0"
-workspace = ".."
 readme = "README.md"
 edition = "2021"
 rust-version = "1.71"
@@ -27,3 +26,6 @@ humansize = ["rinja/humansize"]
 num-traits = ["rinja/num-traits"]
 serde_json = ["rinja/serde_json"]
 urlencode = ["rinja/urlencode"]
+
+[workspace]
+members = ["."]