Support building conda packages

.github/workflows/build_conda_macos.yml

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+name: build_conda_macos
+
+on:
+  push:
+    tags:
+      - '*'
+    branches:
+      - conda
+
+concurrency:
+  group: build_conda_macos-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build_conda_macos:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macos-10.15]
+        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10"]
+
+    steps:
+      # refer to https://github.com/actions/checkout
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - uses: conda-incubator/setup-miniconda@v2
+        with:
+          auto-update-conda: true
+          python-version: ${{ matrix.python-version }}
+          activate-environment: kaldialign
+
+      - name: Display Python version
+        shell: bash -l {0}
+        run: |
+          python3 -c "import sys; print(sys.version)"
+          which python3
+
+      - name: Install conda dependencies
+        shell: bash -l {0}
+        run: |
+          conda install -y -q anaconda-client
+          conda install -y -q conda-build
+
+      - name: Display conda info
+        shell: bash -l {0}
+        run: |
+          which conda
+          conda env list
+          conda info
+
+      - name: Build kaldialign
+        shell: bash -l {0}
+        env:
+          KALDIALIGN_CONDA_TOKEN: ${{ secrets.KALDIALIGN_CONDA_TOKEN }}
+        run: |
+          ./scripts/build_conda.sh
+
+      - name: Display generated files
+        run: |
+          ls -lh /usr/local/miniconda/envs/kaldialign/conda-bld/osx-64
+
+      - name: Upload generated files
+        uses: actions/upload-artifact@v2
+        with:
+          name: cpu-python-${{ matrix.python-version }}-${{ matrix.os }}
+          path: /usr/local/miniconda/envs/kaldialign/conda-bld/osx-64/*.tar.bz2

.github/workflows/build_conda_ubuntu.yml

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+name: build_conda_ubuntu
+
+on:
+  push:
+    tags:
+      - '*'
+    branches:
+      - conda
+
+concurrency:
+  group: build_conda_ubuntu-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build_conda_ubuntu:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-18.04]
+        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10"]
+
+    steps:
+      # refer to https://github.com/actions/checkout
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - uses: conda-incubator/setup-miniconda@v2
+        with:
+          auto-update-conda: true
+          python-version: ${{ matrix.python-version }}
+          activate-environment: kaldialign
+
+      - name: Display Python version
+        shell: bash -l {0}
+        run: |
+          python3 -c "import sys; print(sys.version)"
+          which python3
+
+      - name: Install conda dependencies
+        shell: bash -l {0}
+        run: |
+          conda install -y -q anaconda-client
+          conda install -y -q conda-build
+          conda install -y -q numpy
+
+      - name: Display conda info
+        shell: bash -l {0}
+        run: |
+          which conda
+          conda env list
+          conda info
+          nproc
+
+      - name: Build kaldialign
+        shell: bash -l {0}
+        env:
+          KALDIALIGN_CONDA_TOKEN: ${{ secrets.KALDIALIGN_CONDA_TOKEN }}
+        run: |
+          ./scripts/build_conda.sh
+
+      - name: Display generated files
+        run: |
+          ls -lh /usr/share/miniconda/envs/kaldialign/conda-bld/linux-64
+
+      - name: Upload generated files
+        uses: actions/upload-artifact@v2
+        with:
+          name: python-${{ matrix.python-version }}-${{ matrix.os }}
+          path: /usr/share/miniconda/envs/kaldialign/conda-bld/linux-64/*.tar.bz2

.github/workflows/build_conda_windows.yml

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+name: build_conda_windows
+
+on:
+  push:
+    tags:
+      - '*'
+    branches:
+      - conda
+
+concurrency:
+  group: build_conda_windows-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build_conda_windows:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [windows-2019]
+        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10"]
+
+    steps:
+      # refer to https://github.com/actions/checkout
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - uses: conda-incubator/setup-miniconda@v2
+        with:
+          auto-update-conda: true
+          python-version: ${{ matrix.python-version }}
+          activate-environment: kaldialign
+
+      - name: Display Python version
+        shell: bash -l {0}
+        run: |
+          python -c "import sys; print(sys.version)"
+          which python
+
+      - name: Install conda dependencies
+        shell: bash -l {0}
+        run: |
+          conda install -y -q anaconda-client
+          conda install -y -q conda-build
+
+      - name: Display conda info
+        shell: bash -l {0}
+        run: |
+          which conda
+          conda env list
+          conda info
+          which python
+
+      - name: Build kaldialign
+        shell: bash -l {0}
+        env:
+          KALDIALIGN_CONDA_TOKEN: ${{ secrets.KALDIALIGN_CONDA_TOKEN }}
+        run: |
+          ./scripts/build_conda.sh
+
+      - name: Display generated files
+        shell: bash -l {0}
+        run: |
+          ls -lh /c/Miniconda/envs/kaldialign/conda-bld
+          ls -lh /c/Miniconda/envs/kaldialign/conda-bld/*/*
+          ls -lh /c/Miniconda/envs/kaldialign/conda-bld/win-64/*
+
+      - name: Upload generated files
+        uses: actions/upload-artifact@v2
+        with:
+          name: python-${{ matrix.python-version }}-windows-2019
+          path: c:/Miniconda/envs/kaldialign/conda-bld/win-64/*.tar.bz2

scripts/build_conda.sh

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+#!/usr/bin/env bash
+#
+# The following environment variables are supposed to be set by users
+#
+# - KALDIALIGN_CONDA_TOKEN
+#     If not set, auto upload to anaconda.org is disabled.
+#
+#     Its value is from https://anaconda.org/kaldialign/settings/access
+#      (You need to login as user kaldialign to see its value)
+#
+set -e
+export CONDA_BUILD=1
+
+cur_dir=$(cd $(dirname $BASH_SOURCE) && pwd)
+kaldialign_dir=$(cd $cur_dir/.. && pwd)
+
+cd $kaldialign_dir
+
+export KALDIALIGN_ROOT_DIR=$kaldialign_dir
+echo "KALDIALIGN_DIR: $KALDIALIGN_ROOT_DIR"
+
+KALDIALIGN_PYTHON_VERSION=$(python -c "import sys; print('.'.join(sys.version.split('.')[:2]))")
+
+# Example value: 3.8
+export KALDIALIGN_PYTHON_VERSION
+
+if [ -z $KALDIALIGN_CONDA_TOKEN ]; then
+  echo "Auto upload to anaconda.org is disabled since KALDIALIGN_CONDA_TOKEN is not set"
+  conda build --no-test --no-anaconda-upload ./scripts/conda/kaldialign
+else
+  conda build --no-test --token $KALDIALIGN_CONDA_TOKEN ./scripts/conda/kaldialign
+fi

scripts/conda/kaldialign/meta.yaml

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+package:
+  name: kaldialign
+  version: "1.4"
+
+source:
+  path: "{{ environ.get('KALDIALIGN_ROOT_DIR') }}"
+
+build:
+  number: 0
+  string: py{{ environ.get('KALDIALIGN_PYTHON_VERSION') }}
+  script: {{ PYTHON }} setup.py install --single-version-externally-managed --record=record.txt
+
+requirements:
+  build:
+    - {{ compiler('c') }} # [win]
+    - {{ compiler('cxx') }} # [win]
+
+  host:
+    - anaconda-client
+    - conda-build
+    - cmake
+    - python
+  run:
+    - python
+
+about:
+  home: https://github.com/pzelasko/kaldialign
+  license: Apache V2
+  license_file: LICENSE
+  summary: Python wrappers for Kaldi Levenshtein's distance and alignment code.
+  description: |
+    A small package that exposes edit distance computation functions from Kaldi.
+    It uses the original Kaldi code and wraps it using pybind11.