Tune up backend GHA (#495)

* run cargo steps in sequence

* reorder jobs and gha push event only for master

* split backend gha

.github/workflows/backend.yml

@@ -1,110 +0,0 @@
-name: Backend CI
-
-on:
-  push:
-    paths:
-      - '.github/workflows/backend.yml'
-      - 'backend/**'
-      - '!frontend/**'
-  pull_request:
-    paths:
-      - '.github/workflows/backend.yml'
-      - 'backend/**'
-      - '!frontend/**'
-
-env:
-  CARGO_TERM_COLOR: always
-
-defaults:
-  run:
-    working-directory: ./backend
-
-jobs:
-  build:
-    name: Check Code
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout sources
-        uses: actions/checkout@v3
-
-      - name: Install Rust stable toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: stable
-          override: true
-
-      - name: Rust Cache
-        uses: Swatinem/rust-cache@6720f05bc48b77f96918929a9019fb2203ff71f8 # v2.0.0
-        with:
-          workspaces: backend
-
-      - name: Build
-        run: cargo check --all-targets
-
-  fmt:
-    name: Run rustfmt
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout sources
-        uses: actions/checkout@v3
-
-      - name: Install Rust stable toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: stable
-          override: true
-          components: clippy, rustfmt
-
-      - name: Rust Cache
-        uses: Swatinem/rust-cache@6720f05bc48b77f96918929a9019fb2203ff71f8 # v2.0.0
-        with:
-          workspaces: backend
-
-      - name: Cargo fmt
-        run: cargo fmt --all -- --check
-
-  docs:
-    name: Check Documentation
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout sources
-        uses: actions/checkout@v3
-
-      - name: Install Rust stable toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: stable
-          override: true
-
-      - name: Rust Cache
-        uses: Swatinem/rust-cache@6720f05bc48b77f96918929a9019fb2203ff71f8 # v2.0.0
-        with:
-          workspaces: backend
-
-      - name: Check internal documentation links
-        run: RUSTDOCFLAGS="--deny broken_intra_doc_links" cargo doc --verbose --workspace --no-deps --document-private-items
-
-  tests:
-    name: Run tests
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout sources
-        uses: actions/checkout@v3
-
-      - name: Install Rust stable toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: stable
-          override: true
-
-      - name: Rust Cache
-        uses: Swatinem/rust-cache@6720f05bc48b77f96918929a9019fb2203ff71f8 # v2.0.0
-        with:
-          workspaces: backend
-
-      - name: Cargo test
-        run: cargo test --verbose --jobs 1

.github/workflows/backend_check.yml

@@ -0,0 +1,45 @@
+name: Backend CI - cargo check
+
+on:
+  push:
+    branches:
+      - master
+    paths:
+      - '.github/workflows/backend*'
+      - 'backend/**'
+      - '!frontend/**'
+  pull_request:
+    paths:
+      - '.github/workflows/backend*'
+      - 'backend/**'
+      - '!frontend/**'
+
+env:
+  CARGO_TERM_COLOR: always
+
+defaults:
+  run:
+    working-directory: ./backend
+
+jobs:
+  check:
+    name: Check Code
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v3
+
+      - name: Install Rust stable toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+
+      - name: Rust Cache
+        uses: Swatinem/rust-cache@6720f05bc48b77f96918929a9019fb2203ff71f8 # v2.0.0
+        with:
+          workspaces: backend
+
+      - name: Build
+        run: cargo check --all-targets --verbose

.github/workflows/backend_docs.yml

@@ -0,0 +1,45 @@
+name: Backend CI - cargo doc
+
+on:
+  push:
+    branches:
+      - master
+    paths:
+      - '.github/workflows/backend*'
+      - 'backend/**'
+      - '!frontend/**'
+  pull_request:
+    paths:
+      - '.github/workflows/backend*'
+      - 'backend/**'
+      - '!frontend/**'
+
+env:
+  CARGO_TERM_COLOR: always
+
+defaults:
+  run:
+    working-directory: ./backend
+
+jobs:
+  docs:
+    name: Check Documentation
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v3
+
+      - name: Install Rust stable toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+
+      - name: Rust Cache
+        uses: Swatinem/rust-cache@6720f05bc48b77f96918929a9019fb2203ff71f8 # v2.0.0
+        with:
+          workspaces: backend
+
+      - name: Check internal documentation links
+        run: RUSTDOCFLAGS="--deny broken_intra_doc_links" cargo doc --verbose --workspace --no-deps --document-private-items

.github/workflows/backend_fmt.yml

@@ -0,0 +1,41 @@
+name: Backend CI - cargo fmt
+
+on:
+  push:
+    branches:
+      - master
+    paths:
+      - '.github/workflows/backend*'
+      - 'backend/**'
+      - '!frontend/**'
+  pull_request:
+    paths:
+      - '.github/workflows/backend*'
+      - 'backend/**'
+      - '!frontend/**'
+
+env:
+  CARGO_TERM_COLOR: always
+
+defaults:
+  run:
+    working-directory: ./backend
+
+jobs:
+  fmt:
+    name: Run rustfmt
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v3
+
+      - name: Install Rust stable toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+          components: clippy, rustfmt
+
+      - name: Cargo fmt
+        run: cargo fmt --verbose --all -- --check

.github/workflows/backend_tests.yml

@@ -0,0 +1,45 @@
+name: Backend CI - cargo test
+
+on:
+  push:
+    branches:
+      - master
+    paths:
+      - '.github/workflows/backend*'
+      - 'backend/**'
+      - '!frontend/**'
+  pull_request:
+    paths:
+      - '.github/workflows/backend*'
+      - 'backend/**'
+      - '!frontend/**'
+
+env:
+  CARGO_TERM_COLOR: always
+
+defaults:
+  run:
+    working-directory: ./backend
+
+jobs:
+  tests:
+    name: Run tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v3
+
+      - name: Install Rust stable toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+
+      - name: Rust Cache
+        uses: Swatinem/rust-cache@6720f05bc48b77f96918929a9019fb2203ff71f8 # v2.0.0
+        with:
+          workspaces: backend
+
+      - name: Cargo test
+        run: cargo test --verbose --jobs 1