Adds basic error crate and CI

.github/dependabot.yml

@@ -0,0 +1,10 @@
+version: 2
+updates:
+  - package-ecosystem: cargo
+    directory: "/"
+    schedule:
+      interval: weekly
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: weekly

.github/workflows/ci.yml

@@ -0,0 +1,81 @@
+name: ci
+
+on:
+  pull_request:
+    branches:
+      - main
+  push:
+    branches:
+      - main
+  schedule:
+    - cron: "12 3 * * *"
+
+jobs:
+  fmt:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - run: rustup component add rustfmt
+      - run: cargo fmt --check
+
+  clippy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - run: rustup component add clippy
+      - uses: Swatinem/rust-cache@v2
+      - run: cargo clippy --all-targets -- -D warnings -D clippy::all
+      - run: cargo clippy --all-targets --all-features -- -D warnings -D clippy::all
+
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: Swatinem/rust-cache@v2
+      - run: cargo test
+      - run: cargo test --all-features
+
+  test_msv:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - run: rustup override set 1.75.0 && rustup toolchain install nightly
+      - uses: Swatinem/rust-cache@v2
+      - run: Cargo.lock
+      - run: cargo +nightly update -Z direct-minimal-versions
+      - run: cargo test
+      - run: cargo test --all-features
+
+  rustdoc:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: Swatinem/rust-cache@v2
+      - run: cargo doc --all-features --no-deps
+        env:
+          RUSTDOCFLAGS: -D warnings
+
+  deny:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: taiki-e/install-action@v2
+        with: { tool: cargo-deny }
+      - run: cargo deny check
+
+  semver_checks:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: Swatinem/rust-cache@v2
+      - uses: taiki-e/install-action@v2
+        with: { tool: cargo-semver-checks }
+      # TODO: enable after first release - run: cargo semver-checks check-release || true
+
+  typos:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: taiki-e/install-action@v2
+        with: { tool: typos-cli }
+      - run: typos

Cargo.toml

@@ -1,8 +1,12 @@
 [workspace]
-members = []
+members = ["error"]
 resolver = "2"
 
 [workspace.package]
 edition = "2021"
 version = "0.0.0"
 license = "Apache-2.0"
+rust-version = "1.75"
+
+[workspace.dependencies]
+serde = "1"

deny.toml

@@ -0,0 +1,8 @@
+[licenses]
+allow = [
+    "Apache-2.0",
+    "MIT",
+]
+
+[sources]
+unknown-registry = "deny"

error/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "twurst-error"
+description = "Twirp error struct"
+edition.workspace = true
+version.workspace = true
+license.workspace = true
+
+[dependencies]
+serde = { workspace = true, features = ["derive"], optional = true }

error/README.md

@@ -0,0 +1,12 @@
+Small library implementing the `TwirpError` struct.
+Please don't use it directly but rely on `twurst-client` or `twurst-server`that re-export this type.
+
+## License
+
+Copyright 2024 Helsing GmbH
+
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.
+You may obtain a copy of the License at <http://www.apache.org/licenses/LICENSE-2.0>
+
+Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and limitations under the License.