Rust Integration: Perform Max Flow in Rust instead of Python

.github/workflows/maturin.yml

@@ -0,0 +1,181 @@
+# This file is autogenerated by maturin v1.7.4
+# To update, run
+#
+#    maturin generate-ci github
+#
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+      - master
+    tags:
+      - '*'
+  pull_request:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  linux:
+    runs-on: ${{ matrix.platform.runner }}
+    strategy:
+      matrix:
+        platform:
+          - runner: ubuntu-latest
+            target: x86_64
+          - runner: ubuntu-latest
+            target: x86
+          - runner: ubuntu-latest
+            target: aarch64
+          - runner: ubuntu-latest
+            target: armv7
+          - runner: ubuntu-latest
+            target: s390x
+          - runner: ubuntu-latest
+            target: ppc64le
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: 3.x
+      - name: Build wheels
+        uses: PyO3/maturin-action@v1
+        with:
+          target: ${{ matrix.platform.target }}
+          args: --release --out dist --find-interpreter
+          sccache: 'true'
+          manylinux: auto
+      - name: Upload wheels
+        uses: actions/upload-artifact@v4
+        with:
+          name: wheels-linux-${{ matrix.platform.target }}
+          path: dist
+
+  musllinux:
+    runs-on: ${{ matrix.platform.runner }}
+    strategy:
+      matrix:
+        platform:
+          - runner: ubuntu-latest
+            target: x86_64
+          - runner: ubuntu-latest
+            target: x86
+          - runner: ubuntu-latest
+            target: aarch64
+          - runner: ubuntu-latest
+            target: armv7
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: 3.x
+      - name: Build wheels
+        uses: PyO3/maturin-action@v1
+        with:
+          target: ${{ matrix.platform.target }}
+          args: --release --out dist --find-interpreter
+          sccache: 'true'
+          manylinux: musllinux_1_2
+      - name: Upload wheels
+        uses: actions/upload-artifact@v4
+        with:
+          name: wheels-musllinux-${{ matrix.platform.target }}
+          path: dist
+
+  windows:
+    runs-on: ${{ matrix.platform.runner }}
+    strategy:
+      matrix:
+        platform:
+          - runner: windows-latest
+            target: x64
+          - runner: windows-latest
+            target: x86
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: 3.x
+          architecture: ${{ matrix.platform.target }}
+      - name: Build wheels
+        uses: PyO3/maturin-action@v1
+        with:
+          target: ${{ matrix.platform.target }}
+          args: --release --out dist --find-interpreter
+          sccache: 'true'
+      - name: Upload wheels
+        uses: actions/upload-artifact@v4
+        with:
+          name: wheels-windows-${{ matrix.platform.target }}
+          path: dist
+
+  macos:
+    runs-on: ${{ matrix.platform.runner }}
+    strategy:
+      matrix:
+        platform:
+          - runner: macos-12
+            target: x86_64
+          - runner: macos-14
+            target: aarch64
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: 3.x
+      - name: Build wheels
+        uses: PyO3/maturin-action@v1
+        with:
+          target: ${{ matrix.platform.target }}
+          args: --release --out dist --find-interpreter
+          sccache: 'true'
+      - name: Upload wheels
+        uses: actions/upload-artifact@v4
+        with:
+          name: wheels-macos-${{ matrix.platform.target }}
+          path: dist
+
+  sdist:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Build sdist
+        uses: PyO3/maturin-action@v1
+        with:
+          command: sdist
+          args: --out dist
+      - name: Upload sdist
+        uses: actions/upload-artifact@v4
+        with:
+          name: wheels-sdist
+          path: dist
+
+  release:
+    name: Release
+    runs-on: ubuntu-latest
+    if: ${{ startsWith(github.ref, 'refs/tags/') || github.event_name == 'workflow_dispatch' }}
+    needs: [linux, musllinux, windows, macos, sdist]
+    permissions:
+      # Use to sign the release artifacts
+      id-token: write
+      # Used to upload release artifacts
+      contents: write
+      # Used to generate artifact attestation
+      attestations: write
+    steps:
+      - uses: actions/download-artifact@v4
+      - name: Generate artifact attestation
+        uses: actions/attest-build-provenance@v1
+        with:
+          subject-path: 'wheels-*/*'
+      - name: Publish to PyPI
+        if: "startsWith(github.ref, 'refs/tags/')"
+        uses: PyO3/maturin-action@v1
+        env:
+          MATURIN_PYPI_TOKEN: ${{ secrets.PYPI_API_TOKEN }}
+        with:
+          command: upload
+          args: --non-interactive --skip-existing wheels-*/*

.github/workflows/ci.yaml → .github/workflows/style_lint_test.yaml

@@ -4,7 +4,7 @@ on:
   push
 
 jobs:
-  ci:
+  style-lint-test:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository

.gitignore

@@ -1,9 +1,82 @@
 .envrc
+.env
+.test
+temp*
 results
 figures
-dist
 workloads*
-*.egg-info
-**/__pycache__
 **/*.png
+Cargo.lock
+
+/target
+
+# Byte-compiled / optimized / DLL files
+__pycache__/
+.pytest_cache/
+*.py[cod]
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+.venv/
+env/
+bin/
+build/
+develop-eggs/
+dist/
+eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+include/
+man/
+venv/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+pip-selfcheck.json
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.coverage
+.cache
+nosetests.xml
+coverage.xml
+
+# Translations
+*.mo
+
+# Mr Developer
+.mr.developer.cfg
+.project
+.pydevproject
+
+# Rope
+.ropeproject
+
+# Django stuff:
+*.log
+*.pot
+
 .DS_Store
+
+# Sphinx documentation
+docs/_build/
+
+# PyCharm
+.idea/
+
+# VSCode
+.vscode/
+
+# Pyenv
+.python-version

Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "_lowtime_rs"
+version = "0.2.0"  # keep synced with __init__.py, pyproject.toml
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+[lib]
+name = "_lowtime_rs"
+crate-type = ["cdylib"]
+
+[dependencies]
+pyo3 = "0.22.0"
+pyo3-log = "0.11.0"
+log = "0.4"
+ordered-float = { version = "4.0", default-features = false }
+pathfinding = "4.11.0"

lowtime/__init__.py

@@ -14,4 +14,4 @@
 
 """A library for solving the time-cost tradeoff problem."""
 
-__version__ = "0.2.0"
+__version__ = "0.2.0"  # keep synced with pyproject.toml, Cargo.toml

lowtime/_lowtime_rs.pyi

@@ -0,0 +1,13 @@
+from __future__ import annotations
+
+import networkx as nx
+
+class PhillipsDessouky:
+    def __init__(
+        self,
+        node_ids: list[int] | nx.classes.reportviews.NodeView,
+        source_node_id: int,
+        sink_node_id: int,
+        edges_raw: list[tuple[tuple[int, int], float]],
+    ) -> None: ...
+    def max_flow(self) -> list[tuple[tuple[int, int], float]]: ...